Configuring Port Adapter Modules Interfaces

This chapter describes the individual steps needed to configure the individual port adapter modules. Your switch is configured as specified in your order and is ready for installation and startup when it leaves the factory. As your communication requirements change, you might want to upgrade your system, add components, or change the initial configuration.

Hardware installation and cabling instructions are included in the LightStream 1010 ATM Switch PAM Installation Guide, while command-line interface (CLI) command descriptions are provided in the LightStream 1010 ATM Switch Command Reference.

See the following sections for detailed PAM default configuration instructions:

• Configure 155 SM, MM, UTP Interfaces

• Configure 622 SM and MM Interfaces

• Configure DS-3 and E3 Interfaces

• Configure T1/E1 Trunk Interfaces

• Configure CES/T1 Interfaces

• Configure CES PAMs for Unstructured CES Services

• Configure CES PAMs for Structured CES Services

• Configure 25Mbps Interfaces

• Troubleshoot Interface Configuration

Configure 155 SM, MM, UTP Interfaces

The 155-Mbps SONET STS3c/SDH STM1 Port Adapter Module has four ports and is ideal for intercampus or wide-area links. The four ports on the PAM can be configured as redundant links using the switch routing protocols. The PAM supports SC-type and UTP connectors, while receive and transmit LEDs on each port give quick, visual indications of port status and operation. For detailed network management support, comprehensive statistics gathering and alarm monitoring capabilities are provided, building on the sophisticated manageability mechanisms of SONET/SDH

Each of the ports on the PAM can be configured to support the following clocking options:

• Self-timing based on a Stratum 4 level clock

• Loop timing from the received data stream--ideal for public network connections

• Timing synchronized to a selected master clock port, required in order to distribute a single clock across a network.

The plug-and-play mechanisms of the LightStream 1010 allow the switch to come up automatically. All configuration information for port adapter modules can be saved between hot swaps and switch reboots, while interface types are automatically discovered by the switch. This eliminates mandatory manual configuration.

Traffic-pacing allows the aggregate output traffic rate on any port to be set to a rate below the line rate; this is useful when communicating with a slow receiver or when connected to public networks with peak-rate tariffs.

The plug-and-play mechanisms of the LightStream 1010 switch allow the switches to come up automatically. All configuration information for port adapter modules can be saved between hot swaps and switch reboots, while interface types are automatically discovered by the switch. This eliminates mandatory manual configuration.

The LightStream 1010 supports any combination of port adapter modules, allowing customers to configure their switches with only the number and type of interfaces required, with up to 32 155 Mbps interface ports.

Default 155 ATM Interface Configuration Without Autoconfiguration

If ILMI has been disabled or if the connecting end node does not support ILMI, the following defaults are assigned to all 155 Mbps interfaces:

• ATM interface type = UNI

• UNI version = 3.0

• Maximum VPI bits = 8

• Maximum VCI bits = 14

• ATM interface side = network

• ATM UNI type = private

• Framing = sts-3c

• Clock source = network-derived

• Synchronous Transfer Signal (STS) -stream scrambling = on

• Cell payload scrambling = on

Manual 155 Interface Configuration

Use the following commands to manually change any of the default configuration values:

Examples

The following example changes the default ATM interface type to private using the atm uni type private command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface atm 0/0/0
Switch(config-if)#shutdown
Switch(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/1, changed state to down
%LINK-5-CHANGED: Interface ATM0/0/0, changed state to administratively down
%LINK-5-CHANGED: Interface ATM0/0/1, changed state to going down
%LINK-3-UPDOWN: Interface ATM0/0/1, changed state to down
Switch(config-if)#no atm auto-configuration
% Please 'shut/no shut' this interface for this command to take effect.
Switch(config-if)#atm uni type private
Switch(config-if)#no shutdown
Switch(config-if)#
%LINK-5-CHANGED: Interface ATM0/0/0, changed state to going down
%LINK-3-UPDOWN: Interface ATM0/0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/1, changed state to up
%LINK-3-UPDOWN: Interface ATM0/0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/0, changed state to up
Switch(config-if)#

The following example changes the clock source using the clock source network-derived command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface atm 0/0/0
Switch(config-if)#clock source network-derived

Refer to the section "Troubleshoot Interface Configuration" to confirm your interface configuration.

Configure 622 SM and MM Interfaces

The 622-Mbps SONET STS12/SDH STM4 Port Adapter Module has one port and is ideal for intercampus or wide-area links. The port on the PAM can be configured as a redundant link using the switch routing protocols. The PAM supports an SC-type connector, and receive and transmit LEDs give quick, visual indications of port status and operation. For detailed network management support, comprehensive statistics gathering and alarm monitoring capabilities are provided, building on the sophisticated manageability mechanisms of SONET/SDH

Each of the ports on the PAM can be configured to support the following clocking options:

• Self-timing based on a Stratum 4 level clock

• Loop timing from the received data stream--ideal for public network connections

• Timing synchronized to a selected master clock port, required in order to distribute a single clock across a network.

The plug-and-play mechanisms of the LightStream 1010 allow the switch to come up automatically. All configuration information for port adapter modules can be saved between hot swaps and switch reboots, while interface types are automatically discovered by the switch. This process eliminates mandatory manual configuration.

The plug-and-play mechanisms of the LightStream 1010 switch allow the switches to come up automatically. All configuration information for port adapter modules can be saved between hot swaps and switch reboots, while interface types are automatically discovered by the switch. This eliminates mandatory manual configuration.

The LightStream 1010 supports any combination of port adapter modules, allowing customers to configure their switches with only the number and type of interfaces required, with up to 8 622-Mbps interface ports.

Default 622 ATM Interface Configuration Without Autoconfiguration

If ILMI has been disabled or if the connecting end node does not support ILMI, the following defaults are assigned to all 622 Mbps interfaces:

• ATM interface type = UNI

• UNI version = 3.0

• Maximum VPI bits = 8

• Maximum VCI bits = 14

• ATM interface side = network

• ATM UNI type = private

• Framing = sts-12c

• Clock source = network-derived

• Synchronous Transfer Signal (STS) -stream scrambling = on

• Cell payload scrambling = on

Manual 622 Interface Configuration

Use the following commands to manually change any of the default configuration values:

Examples

The following example changes the default ATM interface type to private using the atm uni type private command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface atm 0/0/0
Switch(config-if)#shutdown
Switch(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/1, changed state to down
%LINK-5-CHANGED: Interface ATM0/0/0, changed state to administratively down
%LINK-5-CHANGED: Interface ATM0/0/1, changed state to going down
%LINK-3-UPDOWN: Interface ATM0/0/1, changed state to down
Switch(config-if)#no atm auto-configuration
% Please 'shut/no shut' this interface for this command to take effect.
Switch(config-if)#atm uni type private
Switch(config-if)#no shutdown
Switch(config-if)#
%LINK-5-CHANGED: Interface ATM0/0/0, changed state to going down
%LINK-3-UPDOWN: Interface ATM0/0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/1, changed state to up
%LINK-3-UPDOWN: Interface ATM0/0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/0, changed state to up
Switch(config-if)#

The following example changes the clock source using the clock source network-derived command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface atm 0/0/0
Switch(config-if)#clock source network-derived

Refer to the section "Troubleshoot Interface Configuration" to confirm your interface configuration.

Configure DS-3 and E3 Interfaces

The 45 Mbps DS-3 Port Adapter Module 34-Mbps and the E3 PAMs are ideal for wide-area connectivity, to link multiple campuses, or to connect to public networks. The ports on the PAM can be set up as redundant links, which are exploited by the switch's sophisticated routing protocols.

Each of the ports on the PAM can be configured to support the following clocking options:

• self-timing based on a Stratum 4 level clock

• loop timing from the received data stream--ideal for public network connections

• timing synchronized to a selected master clock port, required in order to distribute a single clock across a network.

Traffic-pacing allows the aggregate output traffic rate on any port to be set to a rate below the line rate; this is useful when communicating with a slow receiver or when connected to public networks with peak-rate tariffs.

The plug-and-play mechanisms of the LightStream 1010 switch allow the switches to come up automatically. All configuration information for port adapter modules can be saved between hot swaps and switch reboots, while interface types are automatically discovered by the switch. This process eliminates mandatory manual configuration.

The LightStream 1010 supports any combination of port adapter modules, allowing customers to configure their switches with only the number and type of interfaces required, with up to 32 DS-3 or E3 interface ports.

Default DS-3 and E3 ATM Interface Configuration Without Autoconfiguration

If ILMI has been disabled or if the connecting end node does not support ILMI, the following defaults are assigned to all DS-3 or E3 interfaces:

• ATM interface type = UNI

• UNI version = 3.0

• Maximum VPI bits = 8

• Maximum VCI bits = 14

• ATM interface side = network

• ATM UNI type = private

DS3 PAM:

• Framing = cbit-adm

• Cell payload scrambling = off

• Clock source = network-derived

• Line build out (LBO) = short

• Auto-ferf on loss of signal (LOS) = on

• Auto-ferf on out of frame (OOF) = on

• Auto-ferf on red = on

• Auto-ferf on loss of cell delineation (LCD) = on

• Auto-ferf on alarm indication signaling (AIS) = on

E3 PAM:

• Framing = g.832 adm

• Cell payload scrambling = on

• Clock source = network-derived

• Auto-ferf on LOS = on

• Auto-ferf on out of frame (OOF) = on

• Auto-ferf on LCD = on (applicable to nonplcp mode only)

• Auto-ferf on AIS = on

Manual DS-3 and E3 Interface Configuration

Use the following commands to manually change any of the default configuration values:

Examples

The following example changes the default ATM interface type to private using the atm uni type private command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface atm 0/0/0
Switch(config-if)#shutdown
Switch(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/1, changed state to down
%LINK-5-CHANGED: Interface ATM0/0/0, changed state to administratively down
%LINK-5-CHANGED: Interface ATM0/0/1, changed state to going down
%LINK-3-UPDOWN: Interface ATM0/0/1, changed state to down
Switch(config-if)#no atm auto-configuration
% Please 'shut/no shut' this interface for this command to take effect.
Switch(config-if)#atm uni type private
Switch(config-if)#no shutdown
Switch(config-if)#
%LINK-5-CHANGED: Interface ATM0/0/0, changed state to going down
%LINK-3-UPDOWN: Interface ATM0/0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/1, changed state to up
%LINK-3-UPDOWN: Interface ATM0/0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/0, changed state to up
Switch(config-if)#

The following example changes the clock source using the clock source network-derived command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface atm 0/0/0
Switch(config-if)#clock source network-derived

Refer to the section "Troubleshoot Interface Configuration" to confirm your interface configuration.

Configure T1/E1 Trunk Interfaces

The T1 and E1 trunk port adapter module has four ports and is ideal for intercampus or wide-area links. The four ports on the PAM can be configured as redundant links using the switch routing protocols. The PAM supports SC-type and BNC connectors while receive and transmit LEDs on each port give quick, visual indications of port status and operation. For detailed network management support, comprehensive statistics gathering and alarm monitoring capabilities are provided, building on the sophisticated manageability mechanisms of SONET/SDH

Each of the ports on the PAM can be configured to support the following clocking options:

• Self-timing based on a Stratum 4 level clock

• Loop timing from the received data stream--ideal for public network connections

• Timing synchronized to a selected master clock port, required in order to distribute a single clock across a network.

Traffic-pacing allows the aggregate output traffic rate on any port to be set to a rate below the line rate; this is useful when communicating with a slow receiver or when connected to public networks with peak-rate tariffs.

The plug-and-play mechanisms of the LightStream 1010 switch allow the switches to come up automatically. All configuration information for port adapter modules can be saved between hot swaps and switch reboots, while interface types are automatically discovered by the switch. This process eliminates mandatory manual configuration.

The LightStream 1010 supports any combination of port adapter modules, allowing customers to configure their switches with only the number and type of interfaces required, with up to 32 T1 or E1 interface ports.

The T1 and E1 PAMs provide connectivity to the wide area network through T1 or E1 trunk lines.

Default T1 and E1 ATM Interface Configuration Without Autoconfiguration

If ILMI has been disabled or if the connecting end node does not support ILMI, the following defaults are assigned to all T1 and E1 interfaces:

• ATM interface type = UNI

• UNI version = 3.0

• Maximum VPI bits = 8

• Maximum VCI bits = 14

• ATM interface side = network

• ATM UNI type = private

The following PAM types have specific defaults assigned:

T1 PAM:

• Framing = ESF

• Line coding = B8ZS

• Cell payload scrambling = off

• Clock source = network-derived

• Line build out (LBO) = 0 to 110 feet

• Auto-ferf on loss of signal (LOS) = on

• Auto-ferf on out of frame (OOF) = on

• Auto-ferf on red = on

• Auto-ferf on loss of cell delineation (LCD) = on

• Auto-ferf on alarm indication signaling (AIS) = on

E1 PAM:

• Framing = g.832 adm

• Line coding = HDB3

• Cell payload scrambling = off

• Clock source = network-derived

• Auto-ferf on LOS = on

• Auto-ferf on out of frame (OOF) = on

• Auto-ferf on red = on

• Auto-ferf on LCD = on

• Auto-ferf on AIS = on

Manual T1and E1 Interface Configuration

Use the following commands to manually change any of the default configuration values:

Examples

The following example changes the default ATM interface type to private using the atm uni type private command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface atm 0/0/0
Switch(config-if)#shutdown
Switch(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/1, changed state to down
%LINK-5-CHANGED: Interface ATM0/0/0, changed state to administratively down
%LINK-5-CHANGED: Interface ATM0/0/1, changed state to going down
%LINK-3-UPDOWN: Interface ATM0/0/1, changed state to down
Switch(config-if)#no atm auto-configuration
% Please 'shut/no shut' this interface for this command to take effect.
Switch(config-if)#atm uni type private
Switch(config-if)#no shutdown
Switch(config-if)#
%LINK-5-CHANGED: Interface ATM0/0/0, changed state to going down
%LINK-3-UPDOWN: Interface ATM0/0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/1, changed state to up
%LINK-3-UPDOWN: Interface ATM0/0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/0, changed state to up
Switch(config-if)#

The following example changes the clock source using the clock source network-derived command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface atm 0/0/0
Switch(config-if)#clock source network-derived

Refer to the section "Troubleshoot Interface Configuration" to confirm your interface configuration.

Configure CES/T1 Interfaces

The circuit emulation service (CES) T1 and E1 PAMs are ideal for links that require constant bit rate (CBR) services, such as interconnecting Private Branch Exchanges (PBXs), time-division multiplexers, and video conference equipment over campus, public, or private networks. The four ports on the PAM can be configured as redundant links using the switch's routing protocols. The T1 PAMs support UTP connectors and the E1 PAMs support either unshielded twisted-pair (UTP), shielded twisted-pair (STP), or 75-ohm BNC connectors. Status and carrier detect LEDs on each port give quick, visual indications of port status and operation. For detailed network management support, comprehensive statistics gathering and alarm monitoring capabilities are provided.

Each of the ports on the PAM can be configured to support the following clocking options:

• Self-timing based on a Stratum 4 level clock

• Loop timing from the received data stream--ideal for public network connections

• Timing synchronized to a selected master clock port, required in order to distribute a single clock across a network

The plug-and-play mechanisms of the LightStream 1010 allow the switch to come up automatically. All configuration information for port adapter modules can be saved between hot swaps and switch reboots, while interface types are automatically discovered by the switch. This eliminates mandatory manual configuration.

The LightStream 1010 supports any combination of port adapter modules. Customers can configure their switches with only the number and type of interfaces required, with up to 32 CES T1 or CES E1 interface ports.

The CES T1 or CES E1 PAM provides the following ATM connections:

• Interconnecting PBXs

• Time-division multiplexer connections

• Video conference connections

Functionality Supported by CES Modules

The functionality supported by a CES module includes the following:

• Circuit Emulation Services Interworking Function (CES-IWF). This function enables communications to occur between CBR and ATM UNI interfaces.

• T1/E1 CES unstructured services

• T1/E1 CES structured services

These CES services are described briefly in separate sections below.

Figure 16-1 shows a simplified representation of how these types of circuit emulation services can coexist in a LightStream 1010 ATM network and be performed by means of CES modules in LightStream 1010 switches.

CES-IWF

CES-IWF is a service based on ATM Forum standards that allows communications to occur between CBR and ATM User-Network Interface (UNI) interfaces, that is, between non-ATM telephony devices (such as classic PBXs or TDMs) and ATM devices (such as LightStream 1010 switches). For example, an LightStream 1010 equipped with a CES module offers a migration path from classic T1/E1 CBR data communications services to emulated CES T1/E1 unstructured (clear channel) services or structured (N x 64) services in an ATM network.

Figure 16-2 is a simplified representation of CES-IWF functions in a LightStream 1010 network.

T1/E1 Unstructured (Clear Channel) CES Services

Unstructured CES services in a LightStream 1010 network emulate point-to-point connections over T1/E1 leased lines. This service maps the entire bandwidth necessary for a T1/E1 leased line connection across the ATM network, allowing users to interconnect private base exchanges (PBXs), time division multiplexers (TDMs), and video conferencing equipment, as shown in Figure 16-4. Unstructured CES operations do not decode or alter the CBR data in any way.

By means of a CES module, the following unstructured CES services are provided to LightStream 1010 users:

• CES T1 PAM--Supports DSX-1 physical interfaces to provide T1 unstructured (clear channel) CBR data transmission services to LightStream 1010 users at a rate of 1.544 Mbps.

Using a CES T1 PAM for unstructured CES services simulates a point-to-point T1 leased line across your ATM network.

• CES E1 PAM (either 120-ohm or 75-ohm version)--Supports G.703 physical interfaces to provide E1 unstructured (clear channel) CBR data transmission services to LightStream 1010 users at a rate of 2.048 Mbps.

Similarly, using a CES T1 PAM for unstructured CES services simulates a point-to-point E1 leased line across your ATM network.

Figure 16-3 is a generalized representation of how T1/E1 unstructured CES services are accomplished in conjunction with a LightStream 1010 switch equipped with a CES T1/E1 PAM.

Figure 16-4 provides a generalized example of unstructured CES applications in a LightStream 1010 network. During unstructured CES services, user CBR data received from an edge device at one side of the network is segmented into ATM cells and propagated through the ATM network. After traversing the network, the ATM cells are reassembled into a CBR bit stream that matches the original user data. This CBR data is then passed out of the network to the edge device at the destination endpoint.

T1/E1 Structured (N x 64) CES Services

N x 64 refers to a circuit bandwidth (data transmission speed) provided by the aggregation of N x 64 Kbps channels, where N is an integer greater than 1. The 64 Kbps data rate, or the DS0 channel, is the basic building block of the T carrier systems (T1, T2, and T3).

The T1/E1 structured (N x 64) CES services enable a CES module to function in the same way as a classic digital access and crossconnect system (DACS) switch. By means of a CES T1/E1 module, the following structured services are provided to LightStream 1010 users:

• CES T1 PAM--Supports DSX-1 physical interfaces to provide T1 channelized data transmission services at a rate of 1.544 Mbps.

Using a CES T1 PAM, you can map a single digital signal level 0 (DS0) channel or multiple DS0 channels across an ATM network. Each T1 port has up to 24 time slots for allocation to structured CES circuits. Each time slot can transmit CBR data at a rate of 64 Kbps, or at 56 Kbps, if you choose to use optional channel associated signaling (CAS). The later section "Channel Associated Signaling for Structured CES Services Only" describes the CAS mechanism.

• CES E1 PAM (either 120-ohm or 75-ohm version)--Supports G.703 physical interfaces to provide E1 channelized data transmission services at a rate of 2.048 Mbps.

Using either the 120- or 75-ohm version of a CES E1 PAM, you can map a single DS0 channel (64 Kbps) or multiple DS0 channels across an ATM network. Each E1 port has up to 31 available time slots for allocation to structured CES circuits. Each time slot can transmit CBR data at a rate of 64 Kbps.

If you choose to use optional CAS in conjunction with a structured CES circuit, the effective data transfer rate of the circuit is limited to 56 Kbps, since 8 Kbps of the circuit's bandwidth is required for signaling purposes.

Figure 16-5 illustrates the digital crossconnect and channelized mapping functions supported by a LightStream 1010 switch equipped with a CES module.

With T1/E1 structured CES services, network designers can simplify networks by eliminating TDM devices, using LightStream 1010 CES modules instead as a means of allocating T1/E1 bandwidth to PBXs and teleconferencing equipment.

As Figure 16-5 demonstrates, structured services in a CES module allow T1/E1-formatted CBR data to be provisioned into individual DS0 channels (PVCs) or groups of DS0 channels.

Data from these channels can be sent to multiple individual output ports on a CES module where the data can be combined with CBR data from other DS0 channels or groups of DS0 channels to form an outgoing T1/E1 bit stream. Thus, you can combine structured CBR data in a highly flexible way for transport across an ATM network.

Figure 16-6, for example, illustrates how 24 available N x 64 DS0 time slots in a CES T1 PAM can be combined in any number of ways to accomplish structured CBR data transport in an ATM network. Note that the DS0 channels can be grouped as contiguous or non-contiguous time slots.

The DS0 time slots chosen for illustrative purpose in Figure 16-6 have no particular significance. In other words, you can allocate the available DS0 time slots for a CES T1 PAM in any way that suits the bandwidth requirements of a particular CES circuit.

For example, Figure 16-6 shows DS0 time slots #7, #8, and #24 being bundled to form a single 192 Kbps circuit; at the other end of the connection, you can bundle any of three (available, as well as different) DS0 time slots (such as #18, #19, and #20) to complete the CES circuit. For example, if you allocate three DS0 time slots at one end of the connection, you must also allocate three DS0 time slots at the other end of the connection.

For CES structured services, each DS0 time slot represents a data bandwidth of 64 Kbps for CBR data transport. However, if you are using optional CAS during CBR data transport, the data bandwidth is limited to 56 Kbps per DS0 time slot.

Figure 16-7 illustrates how 31 available N x 64 DS0 time slots can be provisioned for structured CES services in a CES E1 PAM. The previous rule for DS0 time slot allocation with a CES T1 PAM also applies to the CES E1 PAM. In other words, the specific DS0 time slot numbers assigned at one end of the circuit in a CES E1 PAM need not map identically one for one to the DS0 time slot numbers at the other end of the CES circuit. Only the aggregate number of such DS0 time slots provisioned at each end of the circuit must agree.

Channel Associated Signaling for Structured CES Services Only

Since the CES T1/E1 PAM emulates constant bit rate services over ATM networks, it must be capable of providing support for handling CAS information introduced into structured CES circuits by PBXs and TDMs. An optional CAS feature for the CES T1/E1 PAM meets this requirement.

With respect to the CAS information carried in a CBR bit stream, a CES module can be configured to operate as follows:

• Case 1--Without the optional CAS feature enabled (the default state)

In this case, the CES module does not sense the CAS information (carried as ABCD bits in the CBR bit stream) and provides no support for CAS functions.

• Case 2--With the optional CAS feature enabled, but without the optional, Cisco-proprietary on-hook detection feature enabled

In this case, in addition to packaging incoming CBR data into ATM AAL1 cells in the usual manner for transport through the network, the CES module in the ingress LightStream 1010 node (see Figure 16-8) senses the ABCD bit patterns in the incoming data, incorporates these patterns in the ATM cell stream, and propagates the cells to the next node in the network. The ATM cells are transported across the network from link to link until the egress LightStream 1010 node is reached (see Figure 16-8).

At the egress node, the CES module strips off the ABCD bit patterns carried by the ATM cells, reassembles the CAS ABCD bits and the user's CBR data into original form, and passes the frames out of the ATM network on the proper DS0 time slot.

All these processes occur transparently without user notice.

• Case 3--With both the optional CAS and on-hook detection features enabled

In this case, the CAS and on-hook detection features work together to provide a means for an ingress node in an ATM network to monitor on-hook and off-hook conditions for a specified 1 x 64 structured CES circuit. As implied by 1 x 64, the on-hook detection (or bandwidth-release) feature is supported only in a structured CES circuit that involves a single DS0 time slot at each end of the connection, as shown in Figure 16-8.

As shown in Figure 16-8, however, the DS0 time slot configured for the structured CES circuit at the ingress node (time slot 2) can be different from the DS0 time slot configured at the egress node (time slot 4). These particular time slots were chosen merely for illustrative purposes; only one such time slot can be configured at each end of the circuit when using the on-hook detection feature.

When you invoke this feature, the ingress CES module monitors the ABCD bits in the incoming CBR bit stream to detect on-hook and off-hook conditions in the circuit. In an off-hook condition, all the bandwidth provisioned for the specified CES circuit is used for transporting ATM AAL1 cells across the network from the ingress node to the egress node.

Conversely, in an on-hook condition, the network periodically sends dummy ATM cells from the ingress node to the egress node to maintain the connection. However, these dummy cells consume only a fraction of the circuit's reserved bandwidth, leaving the rest of the bandwidth available for use by other network traffic. Hence, this bandwidth-release feature enables the network to make more efficient use of its resources.

When the CAS feature is enabled for a CES circuit, the bandwidth of the DS0 channel is limited to 56 Kbps for user data, since CAS functions consume eight Kbps of channel bandwidth for transporting the ABCD signaling bits. These signaling bits are passed transparently from the ingress node to the egress node as part of the ATM AAL1 cell stream.

In summary, when the optional CAS and on-hook detection features are enabled, the following conditions apply:

• The permanent virtual connection (PVC) provisioned for the CES circuit always exists.

• The bandwidth for the CES circuit is always reserved.

• During an on-hook state, most of the bandwidth reserved for the CES circuit is not in use. (Dummy cells are sent from the ingress node to the egress node to maintain the connection.) Therefore, this bandwidth becomes available for use by other network traffic, such as available bit rate (ABR) traffic.

• During an off-hook state, all the bandwidth reserved for the CES circuit is dedicated to that circuit.

A later section entitled "Configure a Soft PVC for Structured CES Services with CAS" outlines the procedures for enabling the CAS feature using CLI commands.

Also, a later section "Configure Structured CES Services with CAS and On-Hook Detection Enabled" outlines the additional steps necessary in setting up a 1 x 64 structured circuit through CLI commands to take advantage of the bandwidth-release feature.

Default CSE T1 and E1 ATM Interface Configuration Without Autoconfiguration

If Interim Link Management Interface (ILMI) has been disabled or if the connecting end node does not support ILMI, the following defaults are assigned to all CES T1 and CES E1 interfaces:

• ATM interface type = UNI

• UNI version = 3.0

• Maximum VPI bits = 8

• Maximum VCI bits = 14

• ATM interface side = network

• ATM UNI type = private

• Loopback = no loop

• Signaling mode = no signaling

• Transmit clock source = through timing

• Data format = clear channel

• Timing = synchronous

• Line build out = 0 to 110 feet

• Cell delay variation = 2000 microseconds

• Channel associated signaling = FALSE

• Partial fill = 47

The following PAM types have specific defaults assigned:

CES T1 PAM:

• Framing = ESF

• Line coding = B8ZS

• Line State = no alarm

CES E1 PAM:

• Line type = E1

• Line coding = HDB3

• International bits = 0x3

• National bits = 0x1f

• Multi-frame spare bits = 0xb

The following defaults apply for all versions of the CES modules, unless you change them manually by means of specific CLI commands issued during module configuration:

• CES-IWF AAL1 service unstructured--This default setting automatically establishes unstructured (clear channel) CES services for a CES module.

• CES-IWF AAL1 clock source synchronous--This default setting automatically establishes synchronous clocking for all CES-IWF operations.

Manual CES T1 and E1 Interface Configuration

Use the following commands to manually change any of the default configuration values:

Examples

The following example changes the default CBR interface DSX-1 framing mode to super frame using the ces dsx1 framing sf command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface cbr 3/0/0
Switch(config-if)# ces dsx1 framing sf

The following example changes the default CBR interface DSX-1 line-build-out to 330 to 440 feet using the ces dsx1 lbo 330_440 command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface cbr 3/0/0
Switch(config-if)#ces dsx1 lbo 330_440

The following example changes the default CBR interface the DSX-1 linecode method to binary 8 zero suppression using the ces dsx1 linecode b8zs command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface cbr 3/0/0
Switch(config-if)#ces dsx1 linecode b8zs

The following example changes the default CBR interface DSX-1 loopback method to use the payload using the ces dsx1 loopback payload command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface cbr 3/0/0
Switch(config-if)#ces dsx1 loopback payload

The following example changes the default CBR interface circuit zero cell delay variation to 30,000 using the ces circuit 0 cdv 30000 command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface cbr 3/0/0
Switch(config-if)#ces circuit 0 cdv 30000

The following example changes the default CBR interface PVC 0 to ATM interface 0/0/0 using the ces pvc 0 dest-address interface atm 0/0/0 command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface cbr 3/0/0
Switch(config-if)#ces pvc 0 dest-address interface atm 0/0/0

Refer to the section "Troubleshoot Interface Configuration" to confirm your interface configuration.

Methods Available for Configuring CES Modules

Basically, two methods are available for configuring a CES module for use in a LightStream 1010 operating environment:

• From a local console or workstation--Connect to the console port or connect to the Ethernet port of a LightStream 1010 switch (see Figure 16-9). This connection allows you to issue CLI commands directly to the LightStream 1010 chassis to configure an installed CES module.

• From a remote console or workstation--Initiate a Telnet connection to a target LightStream 1010 switch (see Figure 16-9). Telnet allows you to remotely issue CLI commands to that chassis to configure an installed CES module.

Conventions Adopted for CES Module Configuration Procedures

The configuration procedures throughout this document are based on the following assumptions/conventions:

• The default host name (or node name) for the target LightStream 1010 chassis is "condor4."

• Unless otherwise indicated, the target LightStream 1010 chassis is assumed to be in the privileged EXEC mode. In this mode, the chassis exhibits the condor4# prompt, indicating that it is ready to receive privileged EXEC commands.

• CLI command input demonstrates the use and syntax of commands for the specific configuration task at hand.

These sample procedures demonstrate typical or common configuration tasks and might not reflect your particular CES module configuration requirements.

• CLI command input is highlighted in bold typeface.

Framing Formats and Line Coding Options for CES Modules

The CES modules support the framing formats and line coding options indicated in Table 16-1.

Guidelines for Creating Soft PVCs for CES Services

As a CES T1/E1 PAM user, you can create either hard PVCs or soft PVCs, depending on your particular CES application requirements. The differences between these two types of CES circuits are noted in later sections dealing with the actual configuration of unstructured (clear channel) and structured (N x 64 Kbps) CES circuits.

The following steps must be performed in a prescribed order when you configure soft PVCs for either unstructured or structured CES services:

Step 1 Determine which two ports you want to define as participants in the soft PVC.

Step 2 Decide which of these two ports you wish to designate as the destination (or passive) side of the soft PVC.

This is an arbitrary decision--it makes no difference which port you define as the destination end of the circuit. However, you must decide which port is to function in this capacity and proceed accordingly.

Step 3 Configure the destination (passive) side of the soft PVC.

You must retrieve this address (see Step 4), as well as the virtual path identifier/virtual channel identifier (VPI/VCI) values for the circuit (see Step 5), and embody these elements as part of the command string when you configure the source (active) end of the soft PVC (see Step 6).

Step 4 Retrieve the CES-IWF ATM address of the destination end of the soft PVC by issuing the CLI show ces address command. This command typically produces output in the following form:

condor4#show ces address

CES-IWF ATM Address(es):
47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1030.10 CBR-PVC-A
47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1030.20 CBR-PVC-AC
47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1034.10 CBR-PVC-B
47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1038.10 CBR-PVC-CA

condor4#

Step 5 Retrieve the VPI/VCI values for the circuit by issuing the CLI show ces circuit interface cbrx/x/x # command. This command typically produces output in the following form:

condor4#show ces circuit interface cbr 0/1/1 1
Circuit: Name CBR-PVC-B, Circuit-state ADMIN_UP / OPER_DOWN
Interface CBR0/1/1, Circuit_id 1, Port-Type T1, Port-State UP
Port Clocking network-derived, aal1 Clocking Method CESIWF_AAL1_CLOCK_SYNC
Channel in use on this port: 10-13
Channels used by this circuit: 10-13
Cell-Rate: 681, Bit-Rate 256000
cas OFF, cell_header 0x4100 (vci = 1040)
cdv 2000 usecs, Measured cdv -1 usecs
ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0
state: VcInactive, maxQueueDepth 57, startDequeueDepth 40
Partial Fill: 47, Structured Data Transfer 1
Passive SoftVC
Src: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1034.10 vpi 0, vci 1040
Dst: atm addr default vpi 0, vci 0

condor4#

Step 6 Configure the source (active) end of the soft PVC; at the same time, complete soft PVC set up using the information derived from Step 4 and Step 5.

You must configure the source end of the soft PVC last, because doing so not only defines the configuration information for the source port, but also requires you to enter the CES-IWF ATM address and VPI/VCI values for the destination port.

If you have not already defined the destination port for the soft PVC (as required by Step 3), this CES-IWF ATM address would not be defined for the destination port, nor would the VPI/VCI values be available as required by Step 6 for use in completing the soft PVC.

Determine Currently Configured CES Interfaces in LightStream 1010 Chassis

Before configuring new interfaces for a CES module, it might be useful to determine which interfaces are already defined for CES modules in your LightStream 1010 chassis. Make this determination by issuing the show ces status CLI command at the privileged EXEC mode prompt:

condor4#show ces status
   Interface      IF      Admin        Port  Channels in
     Name       Status   Status        Type      use    
------------- -------- --------- ----------- -----------
     	CBR0/1/0	       UP	        UP	          T1 	       1-24
	     CBR0/1/1       	UP	        UP	          T1	        1-24
	     CBR0/1/2	       UP	        UP	          T1	        1-24 
	     CBR0/1/3	       UP	        UP          	T1	        1-24
condor4#

This command displays key information about the presently configured CBR interfaces in your LightStream 1010 chassis. In this particular case, the output shows that a CES T1 module is installed in chassis slot 0, module slot 1, and that all four ports (0 - 3) of the module are configured for service.

Configure CES PAMs for Unstructured CES Services

This section presents the CLI-based procedures you use in configuring CES modules for unstructured (clear channel) CES services.

A circuit that you set up on a CBR port for unstructured service is always identified as circuit 0, since there can only be one such circuit established on any given CBR port. Such a circuit consumes the entire bandwidth of a T1/E1 port, as indicated below:

• A hard PVC on a T1/E1 port--The entire bandwidth of a T1 port (1.544 Mbps) or an E1 port (2.048 Mbps) is allocated manually at the time you set up the unstructured circuit and remains dedicated to that port, whether that port is actively transmitting CBR data or not.

• A soft PVC on a T1/E1 port--The entire bandwidth of a T1 port (1.544 Mbps) or an E1 port (2.048 Mbps) is also allocated manually at the time you set up the circuit, but this bandwidth is used by the unstructured circuit only when it is active.

The procedures in this section begin with the simplest of the configuration tasks for unstructured CES services, namely, configuring a hard PVC to use adaptive clocking.

However, synchronous clocking is the default clocking mode for all CES modules. It is the clocking mode used in most CES applications. Proceed directly to the later section entitled "Configure a Hard PVC with Synchronous Clocking" if so doing meets your particular CES application requirements.

Configure a Hard PVC with Adaptive Clocking

A CES module converts CBR traffic into ATM cells for propagation through an ATM network. CBR traffic arriving on a given CES module port must first be segmented into ATM cells. This cell stream is then directed to an outgoing ATM port or CBR port. If the outgoing port is an ATM port on the same LightStream 1010 chassis, then the PVC is called a hard PVC.

As a general rule in setting up a hard PVC, you must interconnect a CBR port and an ATM port in the same LightStream 1010 chassis.

For procedural purposes, assume that a CES module, identified as CBR0/1/0, and an ATM module, identified as ATM0/0/0, are the two interface modules to be involved in the hard PVC; assume further that this hard PVC uses adaptive clocking.

To set up a hard PVC on the target LightStream 1010 switch that satisfies the previous assumptions, perform the following steps:

Step 1 In privileged EXEC mode, enter the configure terminal command:

condor4#configure terminal
condor4(config)#

The configure command sets the chassis to the global configuration mode; terminal is a keyword that identifies the terminal (console) as the source of subsequent configuration commands.

Step 2 In global configuration mode, enter the interface CBR0/1/0 command:

condor4(config)#interface CBR0/1/0
condor4(config-if)#

This command sets the LightStream 1010 chassis to the interface configuration mode and identifies interface CBR0/1/0 as the chassis element for subsequent configuration.

This command also causes particular VPI and VCI values to be assigned automatically (implicitly) to the source port (CBR0/1/0) by LightStream 1010 software (see Figure 16-10). These implicit VPI/VCI values are hardware dependent, that is, they are assigned by the system, based on the particular port being configured.

In effect, the CBR0/1/0 parameter is the port ID for the CES module which tells you that the PAM is installed in the module 1 position of chassis slot 0.

Step 3 In interface configuration mode, enter the following commands:

condor4(config-if)#no shutdown
condor4(config-if)#ces aal1 service unstructured
condor4(config-if)#ces aal1 clock adaptive

Respectively, these commands:

(a) Place the CES module in a fully operational or UP state, enabling all CES functions on the module.

(b) Direct the module to perform unstructured CES services.

(c) Direct the module to use adaptive clocking.

Step 4 To define the destination port (ATM 0/0/0) for the hard PVC, enter the following commands:

(a) Identify the hard PVC as circuit 0 and assign it the logical circuit name CBR-PVC-A (see Figure 16-10). This logical name has been chosen for demonstration purposes only--it can be any ASCII string of your choosing. If you do not explicitly specify the circuit-name and logical-name parameters in the command line, the system automatically assigns a unique default name for the circuit being configured. This default name takes the form CBRx/y/z:#: the default name for this particular circuit would be CBR0/1/0:0. The notation preceding the colon uniquely identifies the port being configured, and the number following the colon identifies the circuit number (which, for unstructured CES services, is always 0).

(b) Identify a particular ATM interface module, port, and VPI/VCI value for the destination end of the hard PVC (see Figure 16-10).

(c) Exit from the interface configuration mode and return you to the privileged EXEC mode prompt.

After performing the previous procedure, a hard PVC (circuit number 0) named CBR-PVC-A exists between the specified source port in the CES module and the specified destination port in the ATM module.

This CES circuit enables bidirectional, unstructured CBR traffic to flow between these two modules. Figure 16-10 is a logical representation of this circuit.

Figure 16-10: Hard PVC Configured for Unstructured CES Services

Verify a Configured Hard PVC with Adaptive Clocking

To verify the hard PVC established in the previous procedure, perform the following steps:

Step 1 To display the configured CES-IWF ATM address(es) for the local LightStream 1010 chassis, enter the show ces address command at the privileged EXEC mode prompt:

This command displays the CES-IWF ATM address for the destination end of the circuit named CBR-PVC-A (see Figure 16-10). This address results from Step 4 in the previous section "Configure a Hard PVC with Adaptive Clocking."

Step 2 To display basic information about the hard PVC, enter the show ces circuit command:

condor4#show ces circuit
Interface Circuit Circuit-Type X-interface X-vpi X-vci Status
CBR0/1/0 0       HardPVC       ATM0/0/0    0     100   UP

condor4#

This command verifies the source and destination port IDs of the hard PVC and indicates that the circuit is UP, or fully operational.

Step 3 To display detailed information about the hard PVC, enter the show ces circuit interface cbr0/1/0 0 command:

Configure a Hard PVC with Synchronous Clocking

For consistency, this procedure refers to the same port IDs that you used in setting up a hard PVC in the section "Configure a Hard PVC with Adaptive Clocking."

To set up a hard PVC on the target LightStream 1010 chassis with synchronous clocking, perform the following steps:

Step 1 In privileged EXEC mode, enter the configure terminal command:

condor4#configure terminal
condor4(config)#

Step 2 In global configuration mode, enter the interface cbr 0/1/0 command:

condor4(config)#interface cbr 0/1/0
condor4(config-if)#

This command sets the LightStream 1010 chassis to the interface configuration mode and identifies interface CBR0/1/0 as the chassis element for subsequent configuration.

Step 3 In interface configuration mode, enter the following commands:

Verify a Configured Hard PVC with Synchronous Clocking

To verify the configuration information for a hard PVC with synchronous clocking, enter the show ces circuit interface cbr 0/1/0 0 command in privileged EXEC mode:

condor4#show ces circuit interface cbr 0/1/0 0
Circuit: Name CBR-PVC-A, Circuit-state ADMIN_UP / 
Interface CBR0/1/0, Circuit_id 0, Port-Type T1, Port-State UP 
Port Clocking network-derived, aal1 Clocking Method CESIWF_AAL1_CLOCK_SYNC
Channel in use on this port: 1-24
Channels used by this circuit: 1-24
Cell-Rate: 4107, Bit-Rate 1544000
cas OFF, cell_header 0x100 (vci = 16)
cdv 2000 usecs, Measured cdv 350 usecs
ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0
state: VcAlarm, maxQueueDepth      879, startDequeueDepth      491
Partial Fill:       47, Structured Data Transfer 0
HardPVC       
src: CBR0/1/0 vpi 0, vci 16
Dst: ATM0/0/0 vpi 0, vci 100
condor4#

The output from this command verifies the configuration information for the source and destination ports for the hard PVC, confirms synchronous clocking for the circuit named CBR-PVC-A, and indicates that the circuit is UP.

Configure a Soft PVC with Synchronous Clocking

In a soft PVC, as in a hard PVC, you also configure both ends of the CES circuit. However, a soft PVC typically involves CES modules at opposite edges of an ATM network, so, a soft PVC can be set up between any two CES modules anywhere in your network.

The destination address of a soft PVC can point to either of the following:

• A port in the same LightStream 1010 chassis

• A port in any other CES module in the network

For example, if you wish to set up a soft PVC involving a local node and a destination node at the opposite edge of the network, you would need to determine the CES-IWF ATM address of the port in the destination node in order to complete soft PVC set-up.

To obtain the destination address (dest-address) for an already configured port in a CES module, you would log into the remote LightStream 1010 chassis containing that module and issue the show ces address command. This command displays all the CES-IWF ATM addresses currently configured for that node.

For simplicity, however, the procedure in this section assumes that you will be creating a soft PVC between interface modules in the same LightStream 1010 chassis. Furthermore, this soft PVC will involve the same port IDs (CBR0/1/0 and CBR0/1/1) as those used in previous configuration procedures.

To obtain the address for a destination port that you are currently configuring as part of a new soft PVC, issue the show ces address, as shown in Step 4 of the following procedure.

To set up a soft PVC involving port IDs CBR0/1/0 and CBR0/1/1 on the target chassis with synchronous clocking, perform the following steps:

Step 1 In privileged EXEC mode, enter the configure terminal command:

condor4#configure terminal
condor4(config)#

Step 2 In global configuration mode, enter the interface cbr 0/1/1 command:

condor4(config)#interface cbr 0/1/1
condor4(config-if)#

This command sets the LightStream 1010 chassis to the interface configuration mode and identifies interface CBR0/1/1 as the chassis element for subsequent configuration commands.

Step 3 In interface configuration mode, enter the following commands:

condor4(config-if)#ces dsx1 clock source network-derived
condor4(config-if)#no shutdown
condor4(config-if)#ces aal1 service unstructured
condor4(config-if)#ces aal1 clock synchronous
condor4(config-if)#ces circuit 0 circuit-name CBR-PVC-B
condor4(config-if)#^Z
condor4#

Respectively, these commands:

(a) Direct interface CBR0/1/1 to use the PRS for network clock synchronization purposes. In the synchronous clocking mode, the PRS is always derived from a source within the networking environment. Therefore, you must set the CBR port to use this global clocking signal for synchronizing CBR data transport.

(b) Ensure that the target LightStream 1010 chassis remains in an UP state.

(c) Set unstructured CES service for the soft PVC.

(d) Set the synchronous clocking mode for the circuit.

(e) Identify circuit 0 with the name CBR-PVC-B. This logical name has been chosen for demonstration purposes only--it can be any ASCII string of your choosing. If you do not explicitly specify the circuit-name and logical-name parameters in this command line, the system automatically assigns a unique default name in the form CBRx/y/z:# for the circuit being configured. Hence, the default name for this particular circuit would be CBR0/1/1:0, where the notation preceding the colon uniquely identifies the port being configured, and the number following the colon identifies the circuit number (which, for unstructured CES services, is always 0).

(f) Exit from the interface configuration mode and return to the privileged EXEC mode prompt.

Step 4 In privileged EXEC mode, enter the show ces address command:

This command displays the CES-IWF ATM addresses for the circuit: CBR-PVC-A is the active (or source) side of the circuit, while CBR-PVC-B is the destination (or passive) side of the circuit (see Figure 16-11). You need the address of the destination side of the circuit to complete Step 7.

Step 5 Establish global configuration mode by entering the following command:

condor4#configure terminal
condor4(config)#

Step 6 Establish interface configuration mode by entering the following command:

condor4(config)#interface cbr 0/1/0
condor4(config-if)#

This command sets the LightStream 1010 chassis to interface configuration mode and identifies interface CBR0/1/0 as the chassis element for subsequent configuration.

Step 7 In interface configuration mode, enter the following commands:

(a) Temporarily disable circuit 0.

(b) Assign the destination ATM address for circuit CBR-PVC B. This is the CES-IWF ATM address that you displayed by issuing the CLI show ces address command in Step 4.

(c) Return the circuit to an operational state.

(d) Exit from the interface configuration mode and return you to the privileged EXEC mode prompt.

Figure 16-11 shows a logical representation of the soft PVC that you created in performing the previous procedure.

Verify a Configured Soft PVC (with Synchronous Clocking)

To verify the configuration information established previously in creating the soft PVC, perform the following steps:

Step 1 To display the CES circuit, issue the show ces circuit command in privileged EXEC mode:

condor4#show ces circuit
Interface  Circuit  Circuit-Type X-interface X-vpi X-vci Status
CBR0/1/0   0Active  SoftVC        UNKNOWN     0      0      UP
CBR0/1/1   0 Passive SoftVC        UNKNOWN      0      0      UP

condor4#

Step 2 To show detailed circuit information for port 1 (CBR0/1/1) of the soft PVC, issue the show ces circuit interface cbr 0/1/1 0 command:

condor4#show ces circuit interface cbr 0/1/1 0
Circuit: Name CBR-PVC-B, Circuit-state ADMIN_UP /
Interface CBR0/1/1, Circuit_id 0, Port-Type T1, Port-State UP
Port Clocking network-derived, aal1 Clocking Method CESIWF_AAL1_CLOCK_SYNC
Channel in use on this port: 1-24
Channels used by this circuit: 1-24
Cell-Rate: 4107, Bit-Rate 1544000
cas OFF, cell_header 0x4100 (vci = 1040)
cdv 2000 usecs, Measured cdv 316 usecs
ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0
state: VcAlarm, maxQueueDepth 879, startDequeueDepth 491
Partial Fill: 47, Structured Data Transfer 0
Passive SoftVC
Src: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1034.10 vpi 0, vci 1040
Dst: atm addr default vpi 0, vci 0

condor4#

Step 3 To show detailed circuit information for port 0 (CBR0/1/0) of the soft PVC, issue the following command:

condor4#show ces circuit interface cbr 0/1/0 0
Circuit: Name CBR-PVC-A, Circuit-state ADMIN_UP /
Interface CBR0/1/0, Circuit_id 0, Port-Type T1, Port-State UP
Port Clocking network-derived, aal1 Clocking Method CESIWF_AAL1_CLOCK_SYNC
Channel in use on this port: 1-24
Channels used by this circuit: 1-24
Cell-Rate: 4107, Bit-Rate 1544000
cas OFF, cell_header 0x100 (vci = 16)
cdv 2000 usecs, Measured cdv 316 usecs
ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0
state: VcAlarm, maxQueueDepth 879, startDequeueDepth 491
Partial Fill: 47, Structured Data Transfer 0
Active SoftVC
Src: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1030.10 vpi 0, vci 16
Dst: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1034.10 vpi 0, vci 1040

condor4#

Delete Previously-Established PVCs

This section assumes that you will be referencing the same port IDs (CBR0/1/0 and CBR0/1/1) as used in previous configuration procedures and that you will be deleting previously configured hard PVCs.

In deleting previously configured soft PVCs, the following procedure also applies.

To delete previously configured hard PVCs, perform the following steps:

Step 1 In privileged EXEC mode, enter the show ces circuit command:

condor4#show ces circuit
Interface   Circuit   Circuit-Type X-interface X-vpi X-vci Status
CBR1/0      0         HardPVC       ATM0/0       0      100    UP
CBR1/1      0         HardPVC       ATM0/0       0      101    UP
condor4#

This command displays the hard PVCs (or soft PVCs) that are currently configured for your CES T1/E1 PAM.

Step 2 To establish the global configuration mode and identify the console as the source of user input, enter the configure terminal command:

condor4#configure terminal
condor4(config)#

Step 3 At the global configuration mode prompt, enter the following command:

condor4(config)#interface cbr 0/1/0
condor4(config-if)#

This command sets the LightStream 1010 chassis to the interface configuration mode and identifies port CBR0/1/0 as the chassis element for subsequent configuration commands.

Step 4 At the interface configuration mode prompt, enter the following commands:

condor4(config-if)#no ces circuit 0
condor4(config-if)#exit
condor4(config)#

Respectively, these commands:

(a) Delete the previously configured hard PVC on port 0.

(b) Exit from the interface configuration mode and return to the global configuration mode.

Step 5 In global configuration mode, enter the interface cbr 0/1/1 command:

condor4(config)#interface cbr 0/1/1
condor4(config-if)#

This command sets the LightStream 1010 chassis to the interface configuration mode and identifies port CBR0/1/1 as the chassis element for subsequent configuration.

Step 6 In interface configuration mode, enter the following commands:

condor4(config-if)#no ces circuit 0
condor4(config-if)#exit
condor4(config)#^Z
condor4#

Respectively, these commands:

(a) Delete the previously configured hard PVC on port 1.

(b) Exit from the interface configuration mode and return to the global configuration mode.

(c) Exit from the global configuration mode and return to the privileged EXEC mode prompt.

Verify Deletion of Previously-Established PVCs

This procedure, based on the actions taken in the preceding section, enables you to verify the deletion of a previously configured CES circuit.

To verify the deletion of a previously established CES circuit, perform the following steps:

Step 1 In privileged EXEC mode, enter the show ces circuit command:

condor4#show ces circuit
condor4#

The absence of output verifies that all CES circuits are deleted.

Step 2 In privileged EXEC mode, enter the show ces address command:

condor4#show ces address

CES-IWF ATM Address(es):

condor4#

Again, the absence of output verifies that all previous CES-IWF addresses are deleted.

Configure CES PAMs for Structured CES Services

This section presents the CLI-based procedures you use in configuring CES modules for structured (N x 64 Kbps) CES services.

An important distinction that sets structured CES services apart from unstructured CES services is that structured CES services allow you to allocate T1/E1 bandwidth in a highly flexible and efficient manner that consumes only the T1/E1 bandwidth actually required to support the active structured circuit(s) that you configure.

For example, in configuring a CES module for structured service, you can define multiple hard PVCs or soft PVCs for any given CES T1/E1 PAM port:

• CES T1 PAM--This module provides up to 24 DS0 time slots per T1 port for defining structured CES circuits. This represents a total CBR data transmission capacity of 1.536 Mbps (24 x 64 Kbps).

• CES E1 PAM (either 120-ohm or 75-ohm)--These modules provide up to 31 DS0 time slots per E1 port for defining structured CES circuits. This represents a total CBR data transmission capacity of 1.984 Mbps (31 x 64 Kbps).

In both module types, any bits not available for structured CES services are used for framing and out-of-band control.

For structured CES services, you can invoke CAS which provides the ability to detect on hook or off hook conditions for any given structured CES circuit.

The on hook state indicates that the CES circuit is idle or, in effect, unconnected. Conversely, the off hook state indicates that the circuit is in use and, in fact, connected.

The CAS mechanism allows T1/E1 bandwidth to be dynamically allocated and released by hard PVCs or soft PVCs configured for structured CES services. The section "Configure a Soft PVC for Structured CES Services with CAS" provides specific procedures for creating such a circuit.

For simplicity in demonstrating configuration tasks for structured CES services, the procedures in this section are directed primarily to setting up a single CES circuit per T1/E1 port. However, these procedures outline the essential steps and CLI command syntax that you would use if you were to set up multiple CES circuits on a T1/E1 port.

Another important distinction of structured and unstructured CES services is that structured CES services require network clock synchronization.

As noted in the section "Configure Network Clock Priorities and Sources," you must select the clock source and define its priority locally for each LightStream 1010 chassis in your network. You do this by means of the network-clock-select command.

For continuity, the structured CES configuration procedures in this section are based on the conventions outlined in the section "Conventions Adopted for CES Module Configuration Procedures."

Configure a Hard PVC for Structured CES Services without CAS

The assumptions relating to configuring a hard PVC for structured CES services include the following:

• Four time slots (DS0 channels 1-3, and 7) are configured for a circuit named CBR-PVC-A.

• CAS is not used.

• An ATM port in the LightStream 1010 chassis is designated as the destination port of the hard PVC.

To set up a hard PVC for structured CES services according to the previous assumptions, perform the following steps:

Step 1 In privileged EXEC mode, enter the configure terminal command:

condor4#configure terminal

This command sets the LightStream 1010 chassis to the global configuration mode and identifies the console (terminal) as the source of subsequent configuration commands.

Step 2 In global configuration mode, enter the interface cbr 0/1/0 command:

condor4(config)#interface cbr 0/1/0

This command sets the LightStream 1010 chassis to the interface configuration mode and identifies port CBR0/1/0 as the chassis element for subsequent configuration. In effect, this port becomes the source port of the hard PVC (see Figure 16-12).

The VPI/VCI values shown for the source port in Figure 16-12 are automatically assigned by PAM hardware. These values are hardware-dependent entities that uniquely identify the port being configured.

Step 3 In interface configuration mode, enter the ces dsx1 clock source network-derived command:

condor4(config-if)#ces dsx1 clock source network-derived

This command configures port CBR0/1/0 to use the network-derived clocking signal (PRS) for network clock synchronization services. In the synchronous clocking mode, the PRS is always derived from the networking environment. You must set the CBR port to use this clocking signal for synchronizing CBR data transport.

Step 4 To configure the port to support b8zs coding for the DSX-1 physical layer, enter the ces dsx1 line-coding b8zs command:

condor4(config-if)#ces dsx1 line-coding b8zs

Step 5 To configure the port to use the extended super frame (ESF) framing format for the T1/E1 interface, enter the ces dsx1 framing esf command:

condor4(config-if)#ces dsx1 framing esf

Step 6 To enable the port, enter the no shutdown command:

condor4(config-if)#no shutdown

Step 7 To establish structured CES services for the port, enter the following command:

condor4(config-if)#ces aal1 service structured

Step 8 To establish the synchronous clocking mode for the port, enter the following command:

At the conclusion of Step 8, you have completed the configuration of the desired port for the structured CES circuit. You can now proceed with the actual creation of the hard PVC.

Step 9 To specify the four DS0 time slots to be used by the hard PVC, enter the following command:

Step 10 To give the hard PVC a logical name, enter the ces circuit 1 circuit-name CBR-PVC-A command:

Step 11 To enable the hard PVC, enter the no ces circuit 1 shutdown command:

condor4(config-if)#no ces circuit 1 shutdown

Step 12 To define the destination end of the hard PVC and exit from the interface configuration mode, enter the following commands:

condor4(config-if)#ces pvc 1 interface atm 0/0/0 vpi 0 vci 100
condor4(config-if)#^Z
condor4#

Respectively, these commands:

(a) Define a particular ATM port as the destination end of the hard PVC.

(b) Return you to the privileged EXEC mode prompt.

At the conclusion of this procedure, you have created a hard PVC configured for structured CES services, as shown in Figure 16-12.

Verify a Configured Hard PVC without CAS

To verify the hard PVC that you set up in the previous procedure, perform the following steps:

Step 1 At the privileged EXEC mode prompt, enter the following command:

condor4#show ces address

CES-IWF ATM Address(es):
47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1030.10 CBR-PVC-A

This command displays the 20-byte CES-IWF ATM address assigned to the source end of the hard PVC. This address is implicitly assigned by the CES hardware to identify the source end of the hard PVC.

Step 2 To display the details of the hard PVC, enter the show ces circuit command:

condor4#show ces circuit
Interface   Circuit   Circuit-Type X-interface X-vpi X-vci Status
CBR0/1/0   1         HardPVC       ATM0/0/0     0      100    UP

condor4#

Step 3 To display the interface details for port CBR0/1/0, enter the show ces circuit interface cbr 0/1/0 1 command:

condor4#show ces circuit interface cbr 0/1/0 1
Circuit: Name CBR-PVC-A, Circuit-state ADMIN_UP /
Interface CBR0/1/0, Circuit_id 1, Port-Type T1, Port-State UP
Port Clocking network-derived, aal1 Clocking Method CESIWF_AAL1_CLOCK_SYNC
Channel in use on this port: 1-3,7
Channels used by this circuit: 1-3,7
Cell-Rate: 681, Bit-Rate 256000
cas OFF, cell_header 0x100 (vci = 16)
cdv 2000 usecs, Measured cdv -1 usecs
ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0
state: VcLoc, maxQueueDepth 57, startDequeueDepth 40
Partial Fill: 47, Structured Data Transfer 1
HardPVC
src: CBR0/1/0 vpi 0, vci 16
Dst: ATM0/0/0 vpi 0, vci 100

condor4#

Configure a Soft PVC for Structured CES Services without CAS

The procedure below for configuring a soft PVC for structured service is based on the following assumptions:

• Four time slots (DS0 channels) are configured for the soft PVC, as follows:

  • For circuit CBR-PVC-A--DS0 channels 1-3 and 7 are used on port CBR0/1/0

  • For circuit CBR-PVC-B--DS0 channels 10-13 are used on port CBR0/1/1

• Channel associated signaling (CAS) is not used.

• The source (active) side of the soft PVC is named "CBR-PVC-A."

• The destination (passive) side of the soft PVC is named "CBR-PVC-B."

To set up a soft PVC for structured CES services according to the previous assumptions, perform the following steps:

Step 1 At the privileged EXEC mode prompt, enter the configure terminal command:

condor4#configure terminal

This command sets the LightStream 1010 chassis to the global configuration mode and identifies the console (terminal) as the source of subsequent configuration commands.

Step 2 At the global configuration mode prompt, enter the interface cbr 0/1/1 command:

condor4(config)#interface cbr 0/1/1
condor4(config-if)#

This command sets the LightStream 1010 chassis to the interface configuration mode and identifies interface CBR0/1/1 as the chassis element for configuration.

In effect, this port is the destination end of the soft PVC (see Figure 16-13). Refer to the section entitled "Guidelines for Creating Soft PVCs for CES Services," for instructions to configure the destination end of the soft PVC first.

Step 3 To direct port CBR0/1/1 to use the network-derived clocking signal (PRS) for network clock synchronization services, enter the ces dsx1 clock source network-derived command at the interface configuration mode prompt:

condor4(config-if)#ces dsx1 clock source network-derived

In the synchronous clocking mode, the PRS is always derived from a source within the networking environment. Therefore, you must set the CBR port to use this clocking signal for synchronizing CBR data transport.

Step 4 To direct the CES module to use b8zs line coding, enter the ces dsx1 line-coding b8zs command:

condor4(config-if)#ces dsx1 line-coding b8zs

Step 5 To direct the CES module to use the extended super frame (ESF) framing format, enter the ces dsx1 framing esf command:

condor4(config-if)#ces dsx1 framing esf

Step 6 To enable the destination port (CBR0/1/1), that is, set it to a fully operational state, enter the no shutdown command:

condor4(config-if)#no shutdown

Step 7 To establish structured services for the port, enter the ces aal1 service structured command:

condor4(config-if)#ces aal1 service structured

Step 8 To establish the synchronous clocking mode for the port, enter the ces aal1 clock synchronous command:

condor4(config-if)#ces aal1 clock synchronous

You have completed the configuration of the destination port (CBR0/1/1) on the CES module. You can now proceed with the actual creation of the soft PVC on the module.

Step 9 To specify the four DS0 time slots to be used by the soft PVC, enter the following command:

Step 10 To identify the destination (passive) end of the soft PVC, enter the ces circuit 1 circuit-name CBR-PVC-B command:

Step 11 To enable the interface for the destination (passive) end of the soft PVC, enter the no ces circuit 1 shutdown command:

condor4(config-if)#no ces circuit 1 shutdown

Step 12 To exit interface configuration mode and return to privileged EXEC mode, enter the ^Z command:

condor4(config-if)#^Z

condor 4#

Step 13 To retrieve the ATM address for the destination (passive) end of the soft PVC (CBR-PVC-B), enter the show ces address command:

The second of the previous two lines is the CES-IWF ATM address for circuit CBR-PVC-B, that is, the destination end of the soft PVC. Use this address in Step 18.

Step 14 To retrieve the VCI number for circuit CBR-PVC-B, enter the show ces circuit interface cbr 0/1/1 1 command:

This command displays the interface details for circuit CBR-PVC-B, among which is the vpi 0 vci 1040 field near the end of the previous output example. You need this value in configuring the destination ATM address in conjunction with defining the source end of the soft PVC on CBR0/1/0 (see Step 18).

Step 15 To set the LightStream 1010 chassis to the global configuration mode and identify the console (terminal) as the source of configuration commands, enter the configure terminal command:

condor4#configure terminal

Step 16 In global configuration mode, enter the interface cbr 0/1/0 command:

condor4(config)#interface cbr 0/1/0
condor4(config-if)#

This command sets the LightStream 1010 chassis to the interface configuration mode and identifies interface CBR0/1/0 as the chassis element for subsequent configuration. In effect, this command identifies the source (active) side of the soft PVC.

Step 17 To temporarily disable interface CBR0/1/0, enter the ces circuit 1 shutdown command:

condor4(config-if)#ces circuit 1 shutdown

Step 18 To establish the destination CES-IWF ATM address to be used by CBR port 0/1/0 in completing the soft PVC, enter the following ces pvc command:

The command string in the second line is the CES-IWF ATM address of the destination end of the soft PVC. You obtained this address in Step 13.

Note also that the vpi 0 vci 1040 values that you entered as the last element in the previous command string were obtained as a result of Step 14.

Step 19 To re-enable the source port (CBR0/1/0), enter the no ces circuit 1 shutdown command:

condor4(config-if)#no ces circuit 1 shutdown

Step 20 To exit from the interface configuration mode, enter the ^Z command:

condor4(config-if)#^Z

condor4#

This command returns you to the privileged EXEC mode.

After performing this procedure, you have created a soft PVC configured for structured CES services (without channeling associated signaling), as shown in Figure 16-13.

Verify a Configured Soft PVC without CAS

To verify the soft PVC that you set up in the previous procedure, perform the following steps:

Step 1 To display the CES-IWF ATM addresses for the soft PVC, enter the show ces address command at the privileged EXEC mode prompt:

condor4#show ces address

CES-IWF ATM Address(es):
47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1030.10 CBR-PVC-A
47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1034.10 CBR-PVC-B

condor4#

Step 2 To display the details of the CES circuit, enter the show ces circuit command:

condor4#show ces circuit
Interface   Circuit   Circuit-Type  X-interface  X-vpi  X-vci  Status
CBR0/1/0   1 Active  SoftVC        UNKNOWN      0      0     UP
CBR0/1/1   1 Passive SoftVC        UNKNOWN      0      0      UP

condor4#

Step 3 To display the interface details for the source port (CBR0/1/0), enter the show ces circuit interface cbr 0/1/0 1 command:

condor4#show ces circuit interface cbr 0/1/0 1
Circuit: Name CBR-PVC-A, Circuit-state ADMIN_UP /
Interface CBR0/1/0, Circuit_id 1, Port-Type T1, Port-State UP
Port Clocking network-derived, aal1 Clocking Method CESIWF_AAL1_CLOCK_SYNC
Channel in use on this port: 1-3,7
Channels used by this circuit: 1-3,7
Cell-Rate: 681, Bit-Rate 256000
cas OFF, cell_header 0x100 (vci = 16)
cdv 2000 usecs, Measured cdv -1 usecs
ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0
state: VcActive, maxQueueDepth 57, startDequeueDepth 40
Partial Fill: 47, Structured Data Transfer 1
Active SoftVC
Src: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1030.10 vpi 0, vci 16
Dst: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1034.10 vpi 0, vci 1040

condor4#

Step 4 To display the interface details for the destination port (CBR0/1/1), enter the show ces circuit interface cbr 0/1/1 1 command:

condor4#show ces circuit interface cbr 0/1/1 1
Circuit: Name CBR-PVC-B, Circuit-state ADMIN_UP /
Interface CBR0/1/1, Circuit_id 1, Port-Type T1, Port-State UP
Port Clocking network-derived, aal1 Clocking Method CESIWF_AAL1_CLOCK_SYNC
Channel in use on this port: 10-13
Channels used by this circuit: 10-13
Cell-Rate: 681, Bit-Rate 256000
cas OFF, cell_header 0x4100 (vci = 1040)
cdv 2000 usecs, Measured cdv -1 usecs
ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0
state: VcActive, maxQueueDepth 57, startDequeueDepth 40
Partial Fill: 47, Structured Data Transfer 1
Passive SoftVC
Src: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1034.10 vpi 0, vci 1040
Dst: atm addr default vpi 0, vci 0

condor4#

Configure a Soft PVC for Structured CES Services with CAS

The procedures in this section build on the configuration information already established for the soft PVC created in the earlier section entitled "Configure a Soft PVC for Structured CES Services without CAS."

In other words, the only difference between the earlier procedure and the one that follows is that the latter enables channel association signaling (CAS) for the soft PVC.

Hence, the following procedure is based on the following assumptions:

• Four time slots (DS0 channels) remain as previously configured for the soft PVC:

  • For circuit CBR-PVC-A--DS0 channels 1-3 and 7 on port CBR0/1/0

  • For circuit CBR-PVC-B--DS0 channels 10-13 on port CBR0/1/1

• CAS is to be enabled for the circuit.

• The signaling mode for the CBR ports is to be set to "robbedbit."

• The source (active) side of the soft PVC (CBR-PVC-A) remains as previously configured.

• The destination (passive) side of the soft PVC (CBR-PVC-B) remains as previously configured.

To set up a soft PVC for structured CES services with CAS according to the previous assumptions, perform the following steps:

Step 1 In privileged EXEC mode, enter the configure terminal command:

condor4#configure terminal

This command sets the LightStream 1010 chassis to the global configuration mode and identifies the console (terminal) as the source of configuration commands.

Step 2 In global configuration mode, enter the interface cbr 0/1/0 command:

condor4(config)#interface cbr 0/1/0
condor4(config-if)#

This command sets the LightStream 1010 chassis to the interface configuration mode and identifies port CBR0/1/0 as the chassis element for configuration.

In effect, this port is the source port for the soft PVC (see Figure 16-14).

Step 3 In configuration interface mode, enter the following commands:

condor4(config-if)#ces dsx1 signalmode robbedbit
condor4(config-if)#ces circuit 1 shutdown
condor4(config-if)#ces circuit 1 cas
condor4(config-if)#no ces circuit 1 shutdown
condor4(config-if)#

Respectively, these commands:

(a) Set the signaling mode for the source port to robbedbit.

(b) Temporarily disable the source port.

(c) Enable channel associated signaling for the CES circuit.

(d) Re-enable the source port to make it fully operational.

Step 4 In global configuration mode, enter the interface cbr 0/1/1 command:

condor4(config)#interface cbr 0/1/1
condor4(config-if)#

This command sets the LightStream 1010 chassis to the interface configuration mode and identifies port CBR0/1/1 as the chassis element for subsequent configuration.

In effect, this port is the destination port for the soft PVC (see Figure 16-14).

Step 5 In configuration interface mode, enter the following commands:

condor4(config-if)#ces dsx1 signalmode robbedbit
condor4(config-if)#ces circuit 1 shutdown
condor4(config-if)#ces circuit 1 cas
condor4(config-if)#no ces circuit 1 shutdown
condor4(config-if)#^Z
condor4#

Respectively, these commands:

(a) Set the signaling mode for the destination port to robbedbit.

(b) Temporarily disable the destination port to make it non-operational.

(c) Enable channel associated signaling for the CES circuit.

(d) Re-enable the destination port to make it operational.

(e) Exit from the interface configuration mode and return you to the privileged EXEC mode prompt.

After performing this procedure, you have created a soft PVC configured for structured CES services with CAS, as shown in Figure 16-14.

Verify a Configured Soft PVC with CAS

To verify the soft PVC that you set up in the previous procedure, perform the following steps:

Step 1 To display the details of the CES circuit, enter the show ces circuit command at the privileged EXEC mode prompt:

condor4#show ces circuit
Interface   Circuit   Circuit-Type  X-interface  X-vpi  X-vci  Status
CBR0/1/0   1 Active  SoftVC        UNKNOWN      0      0      UP
CBR0/1/1   1 Passive SoftVC        UNKNOWN      0      0      UP

condor4#

Step 2 To display the CES-IWF ATM addresses for the soft PVC, enter the show ces address command:

condor4#show ces address

CES-IWF ATM Address(es):
47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1030.10 CBR-PVC-A
47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1034.10 CBR-PVC-B

condor4#

Step 3 To display the interface details for the source port (CBR0/1/0), enter the show ces circuit interface cbr 0/1/0 1 command:

condor4#show ces circuit interface cbr 0/1/0 1
Circuit: Name CBR-PVC-A, Circuit-state ADMIN_UP /
Interface CBR0/1/0, Circuit_id 1, Port-Type T1, Port-State UP
Port Clocking network-derived, aal1 Clocking Method CESIWF_AAL1_CLOCK_SYNC
Channel in use on this port: 1-3,7
Channels used by this circuit: 1-3,7
Cell-Rate: 697, Bit-Rate 256000
cas ON, cell_header 0x100 (vci = 16)
cdv 2000 usecs, Measured cdv -1 usecs
ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0
state: VcActive, maxQueueDepth 57, startDequeueDepth 40
Partial Fill: 47, Structured Data Transfer 1
Active SoftVC
Src: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1030.10 vpi 0, vci 16
Dst: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1034.10 vpi 0, vci 1040

condor4#

Step 4 To display the interface details for the destination port (CBR0/1/1), enter the show ces circuit interface cbr 0/1/1 1 command:

condor4#show ces circuit interface cbr 0/1/1 1
Circuit: Name CBR-PVC-B, Circuit-state ADMIN_UP /
Interface CBR0/1/1, Circuit_id 1, Port-Type T1, Port-State UP
Port Clocking network-derived, aal1 Clocking Method CESIWF_AAL1_CLOCK_SYNC
Channel in use on this port: 10-13
Channels used by this circuit: 10-13
Cell-Rate: 697, Bit-Rate 256000
cas ON, cell_header 0x4100 (vci = 1040)
cdv 2000 usecs, Measured cdv -1 usecs
ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0
state: VcActive, maxQueueDepth 57, startDequeueDepth 40
Partial Fill: 47, Structured Data Transfer 1
Passive SoftVC
Src: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1034.10 vpi 0, vci 1040
Dst: atm addr default vpi 0, vci 0

condor4#

Create Multiple Soft PVCs on Same CES Port

The following procedure demonstrates the logical process that you would complete in creating more than one structured service PVC on the same T1/E1 port.

For example, Figure 16-15 is a logical representation of how multiple CES circuits can be configured on a single T1/E1 port.

Assume that certain configuration information has already been established for a soft PVC (see Figure 16-13) and that you are to create an additional soft PVC involving the same CES module.

Hence, the following assumptions apply for the task of creating a multiple soft PVC on the same T1/E1 port:

• The source (active) side of a soft PVC named "CBR-PVC-A" has already been created on port CBR0/1/0 (see Figure 16-15).

• The destination (passive) side of a soft PVC named "CBR-PVC-B" has already been created on port CBR0/1/1 (see Figure 16-15).

• A new source (active) side of a soft PVC named CBR-PVC-AC is to be created on port CBR0/1/0 of the CES module, thereby creating a multiple CES circuit on this particular port (see Figure 16-15).

• A new destination (passive) side of a soft PVC named CBR-PVC-CA is to be created on port CBR0/1/2 of the CES module (see Figure 16-15).

In effect, this port is the destination side of the new soft PVC. Refer to the section entitled "Guidelines for Creating Soft PVCs for CES Services," which describes the rationale that requires you to configure the destination end of the soft PVC first.

Step 3 At the interface configuration mode prompt, enter the following commands:

condor4(config-if)#ces dsx1 clock source network-derived
condor4(config-if)#ces dsx1 line-coding b8zs
condor4(config-if)#ces dsx1 framing esf
condor4(config-if)#no shutdown
condor4(config-if)#

Respectively, these commands:

(a) Direct the destination port (CBR0/1/2) to use a network-derived PRS for network clock synchronization services.

(b) Direct the port to use b8zs line coding.

(c) Direct the port to use the extended super frame (ESF) framing format.

(d) Enable the port to make it operational.

Step 4 Continue with the following commands to complete the configuration of the destination port:

In effect, this is the source port of the new multiple soft PVC that you are configuring on the same port (port 0) of the CES module (see Figure 16-15).

Step 6 In interface configuration mode, enter the following commands:

condor4(config-if)#ces circuit 2 timeslots 24
condor4(config-if)#ces circuit 2 circuit-name CBR-PVC-AC
condor4(config-if)#no ces circuit 1 shutdown
condor4(config-if)#^Z
condor4#

Respectively, these commands:

(a) Establish circuit 2 on the same port (CBR0/1/0) and direct the port to use 24 DS0 time slots for the new soft PVC.

(b) Assign circuit 2 the logical name CBR-PVC-AC. This name is used for demonstration purposes only--it can be any ASCII string of your choosing. If you do not explicitly specify the circuit-name and logical-name parameters in the command line, the system automatically assigns a unique default name in the form CBRx/y/z:# for the circuit. The default name in this case would be CBR0/1/0:2, where the notation preceding the colon uniquely identifies the port being configured, and the number following the colon uniquely identifies the circuit on that port. For structured CES services, the circuit number sequence always begins at 1 for each port on a CES module.

(c) Enable the source port to make it operational for the new soft PVC.

(d) Exit from the interface configuration mode and return you to the privileged EXEC mode prompt.

Step 7 At this point, you need to display the CES-IWF ATM addresses assigned by the PAM hardware as the first step toward defining the CES-IWF ATM address for the destination port (CBR-PVC-CA).

The last line in the output previous example is the CES-IWF ATM address of the destination (passive) side of the new soft PVC that you are creating. Use this address in
Step 9.

Step 8 To retrieve the VPI/VCI values pertaining to the destination port (CBR-PVC-CA), enter the show ces circuit interface cbr command in privileged EXEC mode:

condor4#show ces circuit interface cbr 0/1/2 1
Circuit: Name CBR-PVC-CA, Circuit-state ADMIN_UP /
Interface CBR0/1/2, Circuit_id 1, Port-Type T1, Port-State UP
Port Clocking network-derived, aal1 Clocking Method CESIWF_AAL1_CLOCK_SYNC
Channel in use on this port: 10
Channels used by this circuit: 10
Cell-Rate: 171, Bit-Rate 64000
cas OFF, cell_header 0x8100 (vci = 2064)
cdv 2000 usecs, Measured cdv -1 usecs
ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0
state: VcInactive, maxQueueDepth 0, startDequeueDepth 0
Partial Fill: 47, Structured Data Transfer 1
Passive SoftVC
Src: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1038.10 vpi 0, vci 2064
Dst: atm addr default vpi 0, vci 0

condor4#

Note the VPI/VCI values, vpi 0, vci 2064, in the next to last line of the previous output example. These are the VPI/VCI values that you must enter in Step 9, together with the CES-IWF ATM address of the destination port of the new soft PVC (CBR-PVC-CA) that you obtained in Step 7.

Step 9 To complete the creation of the new soft PVC from the source port (CBR-PVC-AC) to the destination port (CBR PCV-CA), enter the following commands:

(a) Set the LightStream 1010 chassis to the global configuration mode and establish the console (terminal) as the source of configuration commands.

(b) Set the chassis to the interface configuration mode and establish CBR0/1/0 as the chassis element to which configuration commands are to be applied.

(c) Assign the CES-IWF ATM address to the destination port (CBR0/1/2) of the new soft PVC named CBR-PVC-CA (see Figure 16-15).

(d) Enable the circuit to make the new soft PVC operational.

(e) Exit from the interface configuration mode and return to the privileged EXEC mode.

After completing this procedure, you have, in effect, created two structured service soft PVCs on port 0 (CBR0/1/0) of the CES module.

Verify Creation of Multiple Soft PVCs on Same CES Port

To verify the multiple soft PVCs that you created on the same port in the previous procedure, perform the following steps:

Step 1 To display the circuit details for the soft PVCs that you created in the previous procedure, enter the show ces circuit command in privileged EXEC mode:

condor4#show ces circuit
Interface    Circuit    Circuit-Type X-interface X-vpi X-vci Status
CBR0/1/0    1 Active   SoftVC        UNKNOWN      0      0      UP
CBR0/1/0    2 Active   SoftVC         UNKNOWN      0      0       UP
CBR0/1/1    1 Passive  SoftVC         UNKNOWN      0      0      UP
CBR0/1/2    1 Passive  SoftVC        UNKNOWN      0      0      UP

condor4#

Step 2 To display the CES-IWF addresses of the soft PVCs that you set up, enter the show ces address command in privileged EXEC mode:

condor4#show ces address

CES-IWF ATM Address(es):
47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1030.10 CBR-PVC-A
47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1030.20 CBR-PVC-AC
47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1034.10 CBR-PVC-B
47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1038.10 CBR-PVC-CA

condor4#

Step 3 To display the interface details for the new circuit 2 soft PVC that you set up on port CBR0/1/0, use the show ces circuit interface cbr command:

condor4#show ces circuit interface cbr 0/1/0 2
Circuit: Name CBR-PVC-AC, Circuit-state ADMIN_UP /
Interface CBR0/1/0, Circuit_id 2, Port-Type T1, Port-State UP
Port Clocking network-derived, aal1 Clocking Method CESIWF_AAL1_CLOCK_SYNC
Channel in use on this port: 1-3,7,24
Channels used by this circuit: 24
Cell-Rate: 171, Bit-Rate 64000
cas OFF, cell_header 0x200 (vci = 32)
cdv 2000 usecs, Measured cdv -1 usecs
ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0
state: VcActive, maxQueueDepth 128, startDequeueDepth 111
Partial Fill: 47, Structured Data Transfer 1
Active SoftVC
Src: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1030.20 vpi 0, vci 32
Dst: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1038.10 vpi 0, vci 2064

condor4#

This command displays the interface details pertaining to circuit 2 of the multiple CES soft PVC previously set up on port 0 of the CES module.

Step 4 To display the interface details for the new circuit 1 soft PVC that you set up on port CBR0/1/2, use the show ces circuit interface cbr command:

condor4#show ces circuit interface cbr 0/1/2 1
Circuit: Name CBR-PVC-CA, Circuit-state ADMIN_UP /
Interface CBR0/1/2, Circuit_id 1, Port-Type T1, Port-State UP
Port Clocking network-derived, aal1 Clocking Method CESIWF_AAL1_CLOCK_SYNC
Channel in use on this port: 10
Channels used by this circuit: 10
Cell-Rate: 171, Bit-Rate 64000
cas OFF, cell_header 0x8100 (vci = 2064)
cdv 2000 usecs, Measured cdv -1 usecs
ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0
state: VcActive, maxQueueDepth 128, startDequeueDepth 111
Partial Fill: 47, Structured Data Transfer 1
Passive SoftVC
Src: atm addr 47.0091.8100.0000.0060.5c71.1f01.4000.0c80.1038.10 vpi 0, vci 2064
Dst: atm addr default vpi 0, vci 0

condor4#

At the conclusion of this procedure, you have verified that the procedures for creating multiple soft PVCs on the same CES port were correctly performed.

Configure Structured CES Services with CAS and On-Hook Detection Enabled

This section outlines the additional steps that you must take to activate the on-hook detection (bandwidth-release) feature in a 1 x 64 structured CES circuit. These steps are summarized briefly below:

Step 1 Configure the structured CES circuit, with CAS enabled. Detailed steps for creating such a circuit are presented in the earlier section entitled "Configure a Soft PVC for Structured CES Services with CAS."

Step 2 Configure the circuit using only one DS0 time slot at each end of the connection.

Step 3 Enable the on-hook detection feature for the circuit by using the CES circuit 1 on-hook-detect 2 command:

condor4#CES circuit 1 on-hook-detect 2

The parameter 2 in the previous command example is a decimal representation of the four hexadecimal ABCD bits of the CAS mechanism. Thus, for purposes of this example, you can assume that the hexadecimal number 2, or binary bit pattern 0010, has been chosen to represent the on-hook state for the CES circuit.

These four ABCD bits in the CAS mechanism are device-specific, depending on the manufacturer of the voice/video telephony device that is generating the CBR traffic. The ABCD bits of the CAS mechanism are user-configurable.

Configure 25Mbps Interfaces

The 25-Mbps Port Adapter Module has twelve 25.6 Mbps ATM ports. Each port is compliant with the ATM Forum PHY standard for 25.6 Mbps over twisted-pair cable and is ideal for workgroup links. Any of the twelve ports on the PAM can be configured as redundant links using the switch's routing protocols. The PAM has a 96-pin Molex connector and a multi-leg 12 RJ-45 cable assembly.

The plug-and-play mechanisms of the LightStream 1010 switch allows the switches to come up automatically. All configuration information for port adapter modules can be saved between hot swaps and switch reboots, while interface types are automatically discovered by the switch. This eliminates mandatory manual configuration.

The LightStream 1010 supports any combinations of port adapter modules, allowing customers to configure their switches with only the number and type of interfaces required with up to 96 25Mbps interface ports.

The 25 Mbps Port Adapter Module has twelve ports and is ideal for workgroup links from the desktop to wiring closet.

Default 25 Mbps ATM Interface Configuration Without Autoconfiguration

If ILMI has been disabled or if the connecting end node does not support ILMI, the following defaults are assigned to all twelve 25-Mbps interfaces:

• ATM interface type = UNI

• UNI version = 3.0

• Maximum VPI bits = 8

• Maximum VCI bits = 14

• ATM interface side = network

• ATM UNI type = private

The following parameters can be configured on physical ports 0 or 6 of the 25Mbps PAM. Parameters configured on port 0 apply to ports 0 to 5 and parameters configured on port 6 apply to ports 6 to 11:

• Output-queue

• Output-threshold

• CAC link-sharing

Manual 25 Mbps Interface Configuration

Use the following commands to manually change any of the default configuration values:

Example

The following example changes the default ATM interface type to private using the atm uni type private command:

Switch#config t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#interface atm 0/0/0
Switch(config-if)#shutdown
Switch(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/1, changed state to down
%LINK-5-CHANGED: Interface ATM0/0/0, changed state to administratively down
%LINK-5-CHANGED: Interface ATM0/0/1, changed state to going down
%LINK-3-UPDOWN: Interface ATM0/0/1, changed state to down
Switch(config-if)#no atm auto-configuration
% Please 'shut/no shut' this interface for this command to take effect.
Switch(config-if)#atm uni type private
Switch(config-if)#no shutdown
Switch(config-if)#
%LINK-5-CHANGED: Interface ATM0/0/0, changed state to going down
%LINK-3-UPDOWN: Interface ATM0/0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/1, changed state to up
%LINK-3-UPDOWN: Interface ATM0/0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0/0/0, changed state to up
Switch(config-if)#

Refer to the section "Troubleshoot Interface Configuration" to confirm your interface configuration.

Troubleshoot Interface Configuration

This section describes procedures used to confirm that the ATM switch PAMs initial configuration procedures were successful.

Table 16-2 describes commands that might be used to confirm that the hardware, software, and interfaces for the LightStream 1010 ATM switch are configured as intended: