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To continue your ATM CES port adapter installation, you must install the port adapter cables and configure the ATM CES interfaces.
You can change the ATM CES port adapter default values so that they are correct for your network environment. The instructions that follow apply to all supported platforms. Minor differences between the platforms are noted.
See the "ATM CES Port Adapter Configuration Examples" section for configuration examples.
Proceed to the following section, "Using the EXEC Command Interpreter."
After you verify that the new ATM CES port adapter is installed correctly (the enabled LED goes on), use the privileged-level configure command to configure the new interfaces. Be prepared with the information you will need, such as the following:
For a summary of the configuration options available and instructions for configuring the ATM CES on a Cisco 7200 series router or a Cisco uBR7246, refer to the appropriate configuration publications listed in the "For More Information" section.
The configure command requires privileged-level access to the EXEC command interpreter, which usually requires a password. Contact your system administrator if necessary to obtain EXEC-level access. Proceed to the following section,"Enabling the ATM CES Port Adapter."
This section describes how to enable the ATM CES port adapter interface, which is the first step in preparing to configure the ATM CES port adapter. The Cisco 7200 series router and the Cisco uBR7246 identify an interface address by its slot number (slots 0 to 6) and interface port number in the format slot/port. Because each ATM CES port adapter contains a single ATM interface, the port number is always 0. For example, the slot/port address of an ATM interface on an ATM CES port adapter installed in slot 4 is 4/0 (see Figure 5-1 for the Cisco 7200 series router and Figure 5-2 for the Cisco uBR7246).
You can identify interface ports by physically checking the slot/port location on the front of the router or by using show commands to display information about a specific interface or all interfaces in the router.
To begin to configure the ATM CES port adapter, start the following task in privileged EXEC mode:
| Task | Command |
|---|---|
Step 1 At the privileged EXEC prompt, enter configuration mode from the terminal. | configure1 |
Step 2 Specify an ATM CES port adapter interface. | interface atm slot/02 |
Step 3 If IP routing is enabled on the system, you can assign a source IP address and subnet mask to the interface. | ip address ip-address mask3 |
To enable the ATM CES port adapter, perform the following task in interface configuration mode:
| Task | Command |
|---|---|
Change the shutdown state to up and enable the ATM interface, thereby starting the segmentation and reassembly (SAR) operation on the interface. |
| 1This command is documented in the "Interface Commands" chapter in the Configuration Fundamentals Command Reference. |
The no shutdown command passes an enable command to the ATM CES port adapter, which then begins SAR operations. It also causes the ATM CES port adapter to configure itself, based on the previous configuration commands sent.
If you want to configure your ATM CES port adapter without CES services, proceed to the following section, "Configuring the ATM CES Port Adapter." If you want to configure your ATM CES port adapter with CES services, proceed to the "Configuring the ATM CES for CES Services" section.
The following sections describe the how to configure the ATM CES port adapter in supported configuration modes without CES services:
For information on configuring the ATM CES port adapter for LANE, see the Wide-Area Networking Configuration Guide and the preface of this document.
To configure the ATM CES port adapter for digital signal level 3 (DS3), perform the following tasks in interface configuration mode:
| Task | Command |
|---|---|
Step 1 Set the line build out length (0 to 50 feet is short and >50 feet is long). Use the no form of this command to return to the default, 0. | [no] atm lbo {short | long} |
Step 2 Select the internal clock source. By default, the internal clock source is selected. Use the no form of this command to negate the default value. | [no] atm clock internal |
Step 3 Enable DS3 scrambling. Use the no form of this command to restore the default value. | [no] atm ds3-scramble |
Step 4 Specify DS3 framing m23plcp, cbitplcp, m23adm, and cbitadm. Use the no form of this command to return to the default, cbitadm. | [no] atm framing {m23plcp | cbitplcp | m23adm | cbitadm} |
To configure the ATM CES port adapter for E3, perform the following tasks in interface configuration mode:
| Task | Command |
|---|---|
Step 1 Set the line build out length (0 to 50 feet is short and >50 feet is long). Use the no form of this command to return to the default, 0. | [no] atm lbo {short | long} |
Step 2 Select the internal clock source. By default, the internal clock source is selected. Use the no form of this command to negate the default value. | [no] atm clock internal |
Step 3 Enable E3 scrambling. Use the no form of this command to restore the default, enabled. | [no] atm e3-scramble |
Step 4 Specify E3 framing g832adm, g751adm, and g751plcp. Use the no form of this command to return to the default, G.751 PLCP framing. | [no] atm framing {g832adm | g751adm | g751plcp} |
A virtual circuit (VC) is a point-to-point connection between remote hosts and routers. A VC is established for each ATM end node with which the router communicates. The characteristics of the VC are established when the VC is created and include the following:
Each VC supports the following router functions:
By default, fast switching is enabled on all ATM CES port adapter interfaces. These switching features can be turned off with interface configuration commands. Autonomous switching must be explicitly enabled for each interface.
When a PVC is configured, all the configuration options are passed on to the ATM CES port adapter. These PVCs are writable into the nonvolatile RAM (NVRAM) and are used when the route processor (RP) image is reloaded.
Some ATM switches might have point-to-multipoint PVCs that do the equivalent of broadcasting. If a point-to-multipoint PVC exists, it can be used as the sole broadcast PVC for all multicast requests.
To configure a PVC, perform the two required tasks in the following sections:
To create a non-ABR PVC on the ATM CES port adapter interface on a Cisco 7200 series router or Cisco uBR7246, perform the following task in interface configuration mode:
| Task | Command |
|---|---|
Create a PVC. | atm pvc vcd vpi vci aal-encap [[peak average {burst}]] [oam {seconds}] [{inarp {seconds}] |
To create an Available Bit Rate (ABR) PVC, you must specify the abr keyword and optional peak cell rate (pcr) and minimum cell rate (mcr) values.
| Task | Command |
|---|---|
Create an ABR PVC. | atm pvc vcd vpi vci aal-encap [abr[pcr {mcr}] [[oam {seconds}] [{inarp {seconds}] |
Optionally, specify the ABR rate factors. The default increase and decrease rate factor is 1/16. | atm abr rate-factors [rate-increase-factor] [rate-decrease-factor] |
Associate an existing map list to an interface. | map-group name |
The following list describes some of the command variables used in the atm pvc command:
vpi | The ATM network VPI to use for this VC in the range of 0 through 255. |
vci | The ATM network VCI to use for this VC in the range of 0 through 65,535. |
encapsulation | The encapsulation type to use on this VC. Use one of the following: · aal5ciscoppp---Cisco PPP over AAL5 encapsulation · aal5mux---Specifies the MUX type for this VC. A protocol type must be specified. · aal5snap---LLC/SNAP precedes the protocol datagram. · aal5nlpid---NLPID precedes the protocol datagram. · ilmi---ILMI encapsulation. · qsaal---A signaling type VC. |
protocol-type-for-mux | A protocol type compatible with the MUX is required. |
peak-rate | (Optional.) The maximum rate, in kilobits per second, at which this VC can transmit. |
average-rate | (Optional.) The average rate, in kilobits per second, at which this VC will transmit. |
burst | (Optional.) The burst cell size is an integer value, in the range 1 through 64,000. This relates to the maximum number of ATM cells that the virtual circuit can transmit to the network at the peak rate of the PVC. |
abr | The abr cell rate to use on this VC. Optionally, you can use one of the following values: · pcr---(Optional.) The peak cell rate, in kilobits per second, at which the VC can transmit. · mcr---(Optional.) The minimum cell rate, in kilobits per second, at which the VC can transmit. |
When you create any PVC, you create a virtual circuit descriptor (VCD) and attach it to the VPI and VCI. A VCD is an ATM CES port adapter-specific mechanism that identifies to the ATM CES port adapter the VPI-VCI pair to be used for a particular packet. The ATM CES port adapter requires this feature in order to manage the packets for transmission. The number chosen for the VCD is independent of the VPI-VCI pair used.
When you create any PVC, you also specify the ATM adaption layer (AAL) and encapsulation. Omitting a peak and average value causes the PVC and those values to be set to the line rate, with the peak and average value being equal.
You can configure the PVC for communication with the Interim Local Management Interface (ILMI). Doing so enables the router to receive Simple Network Management Protocol (SNMP) traps and new network prefixes. Refer to the Wide-Area Networking Configuration Guide for details.
You can also configure the PVC to send Operation, Administration, and Maintenance (OAM) F5 loopback cells, which verify connectivity on the virtual circuit. The remote end must respond by echoing back such cells.
For example:
router(config-if)# interface atm 2/0 router(config-if)# atm pvc 2046 255 128 aal5snap 10 10 2046
The atm pvc command creates PVC n and attaches the PVC to VPI and VCI. The AAL used is specified by aal and encapsulation by encap. The peak and avg rate selection values are specified in kilobits per second. Not specifying a peak and avg value causes the PVC to default to the line rate.
The default for peak-rate and average-rate is that peak rate = average rate = line rate.
See examples of PVC configurations in the "ATM CES Port Adapter Configuration Examples" section.
This section describes the procedure for mapping a protocol address to a PVC, which is a required task if you are configuring a PVC. The ATM interface supports a static mapping scheme that identifies the ATM addresses of remote hosts or routers. This address is specified as a virtual circuit descriptor (VCD) for a PVC (or an NSAP address for SVC operation).
You enter mapping commands as groups. You first create a map list and then associate it with an interface. Begin the following task steps in global configuration mode:
| Task | Command |
|---|---|
Step 1 Create a map list by naming it; then enter map-list configuration mode. | map-list name |
Step 2 Associate a protocol and address to a specific virtual circuit. | protocol protocol-address atm-vc vcd [broadcast] |
Step 3 Specify an ATM interface and enter interface configuration mode. | interface atm slot/port1 |
Step 4 Create a PVC. or Create an ABR PVC. | atm pvc vcd vpi vci aal-encap [[peak average burst]] [oam seconds] atm pvc vcd vpi vci aal-encap [abr[pcr mcr]] [oam seconds] |
Step 5 Associate a map list to an interface. | map-group name |
| 1This command is documented in the "Interface Commands" chapter in the Configuration Fundamentals Command Reference. |
A map list can contain multiple map entries, as Steps 2 and 3 in the preceding task table illustrate. The broadcast keyword specifies that this map entry is to be used when the corresponding protocol sends broadcast packets to the interface (for example, any network routing protocol updates). If you do not specify broadcast, the ATM software is prevented from sending routing protocol updates to the remote hosts.
If you do specify broadcast, and do not set up point-to-multipoint signaling, pseudobroadcasting is enabled. To eliminate pseudobroadcasting and set up point-to-multipoint signaling on virtual circuits configured for broadcasting, refer to the Wide-Area Networking Configuration Guide.
When the map list is complete, you associate the map list with an ATM interface by using the name argument (see Step 5).
You can create multiple map lists, but only one map list can be associated with an interface. Different map lists can be associated with different interfaces. See the "ATM CES Port Adapter Configuration Examples" section.
For further information on configuring the ATM CES port adapter for PVCs, see the Wide-Area Networking Configuration Guide.
The ATM signaling software provides a method of dynamically establishing, maintaining, and clearing ATM connections at the User-Network Interface (UNI). The ATM signaling software conforms to ATM Forum UNI 3.0.
In UNI mode, the user is the router and the network is an ATM switch. This is an important distinction. The Cisco router does not perform ATM-level call routing. Instead, the ATM switch does the ATM call routing, and the router routes packets through the resulting circuit. The router is viewed as the user and the LAN interconnection device at the end of the circuit, and the ATM switch is viewed as the network.
Figure 5-3 illustrates the router position in a basic ATM environment. The router is used primarily to interconnect LANs via an ATM network. The workstation connected directly to the destination ATM switch illustrates that you can connect not only routers to ATM switches, but also any computer with an ATM interface that conforms to the ATM Forum UNI specification.
Complete the required tasks in the following sections to use SVCs:
For further information on configuring the ATM CES port adapter for SVCs, see the Wide-Area Networking Configuration Guide.
Unlike X.25 service, which uses in-band signaling (connection establishment done on the same circuit as data transfer), ATM uses out-of-band signaling. One dedicated PVC exists between the router and the ATM switch, over which all SVC call establishment and call termination requests flow. After the call is established, data transfer occurs over the SVC, from router to router. The signaling that accomplishes the call setup and teardown is called Layer 3 signaling or the Q.2931 protocol.
For out-of-band signaling, a signaling PVC must be configured before any SVCs can be set up. In Figure 5-4, a signaling PVC from the source router to the ATM switch is used to set up two SVCs. This is a fully meshed network; workstations A, B, and C all can communicate with each other.
To configure the signaling PVC for all SVC connections, perform the following task in interface configuration mode:
| Task | Command |
|---|---|
Configure the signaling PVC for a major interface that uses SVCs. | atm pvc vcd vpi vci qsaal |
The VPI and VCI values must be configured consistently with the local switch. The standard value of VPI is 0; the standard value of VCI is 5.
See the "Example of SVCs in a Fully Meshed Network" section, for a sample ATM signaling configuration.
Every ATM interface involved with signaling must be configured with a network service access point (NSAP) address. The NSAP address is the ATM address of the interface and must be unique across the network.
You can do one of the following to configure an NSAP address:
When you configure the ATM NSAP address manually, you must enter the entire address in hexadecimal format; that is, each digit entered represents a hexadecimal digit. To represent the complete NSAP address, you must enter 40 hexadecimal digits in the following format:
XX.XXXX.XX.XXXXXX.XXXX.XXXX.XXXX.XXXX.XXXX.XXXX.XX
Because the interface has no default NSAP address, you must configure the NSAP address for SVCs. To set the ATM interface's source NSAP address, perform the following task in interface configuration mode:
| Task | Command |
|---|---|
Configure the ATM NSAP address for an interface. | atm nsap-address nsap-address |
In the following example, NSAP address AB.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12 is assigned to ATM interface 4/0:
interface ATM4/0 atm nsap-address AB.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12
You can display the ATM address for the interface by executing the show interface atm command.
To configure the router to get the NSAP prefix from the switch, the switch must be capable of delivering the NSAP address prefix to the router via ILMI, and the router must be configured with a PVC for communication with the switch via ILMI.
To configure the router to get the NSAP prefix from the switch and use locally entered values for the remaining fields of the address, complete the following tasks in interface configuration mode:
| Task | Command |
|---|---|
Configure a PVC for communicating with the switch via ILMI. | atm pvc vcd 0 16 ilmi |
Enter the ESI and Selector fields of the NSAP address. | atm esi-address esi.selector |
In the atm esi-address command, the esi argument is 6 hexadecimal bytes long (12 digits), and the selector argument is 1 hexadecimal byte long (2 digits).
In the following example on a Cisco 7200 series router, the ESI and Selector field values are assigned, and the ILMI PVC is set up:
interface atm 4/0 atm pvc 2 0 16 ilmi atm esi-address 345678901234.12
Cisco implements both the ATM Address Resolution Protocol (ARP) server and ATM ARP client functions described in RFC 1577. RFC 1577 models an ATM network as a logical IP subnetwork on a LAN.
The tasks required to configure classical IP and ARP over ATM depend on whether the SVCs or PVCs are in the environment. For further information, refer to the Wide-Area Networking Configuration Guide.
You can customize the ATM CES port adapter. The features you can customize have default values that will probably suit your environment and not need to be changed. However, you might need to enter configuration commands, depending on the requirements for your system configuration and the protocols you plan to route on the interface. Perform the tasks in the following sections if you need to customize the ATM CES port adapter:
Each ATM interface has a default maximum packet size or maximum transmission unit (MTU) size. On the ATM CES port adapter, this number defaults to 4470 bytes, the range being 64 through 9188 bytes. To set the maximum MTU size, perform the following task in interface configuration mode:
| Task | Command |
|---|---|
Set the maximum MTU size. |
| 1This command is documented in the "Interface Commands" chapter in the Configuration Fundamentals Command Reference. |
In STM-1 mode, the ATM CES port adapter sends idle cells for cell-rate decoupling. In STS-3C mode, the ATM CES port adapter sends unassigned cells for cell-rate decoupling. The default SONET setting is STS-3C. To configure for STM-1, perform the following task in interface configuration mode:
| Task | Command |
|---|---|
Configure SONET framing | atm sonet stm-1 |
To change back to STS-3C, use the no atm sonet stm-1 command.
By default, the ATM CES port adapter uses the internal clock. The internal clock source is selected using the network clock select command.
| Task | Command |
|---|---|
Select the internal clock source. |
For more information on setting the clock source, see the "Defining Clock Sources and Priorities for an ATM CES Port Adapter" section.
You can control the amount that the cell transmission rate for ABR VCs increases or decreases in response to flow control information from the network or destination by setting the Available Bit Rate (ABR) rate factors. To set the ABR rate increase factor (rif) and rate decrease factor (rdf), perform the following task in interface configuration mode:
| Task | Command |
|---|---|
Change ABR rate factor. | atm abr [[rif] [rdf]] |
You can select the maximum number of transmit channels1 used by the interface. The atm max-channels command can be used to divide the maximum number (fixed) of transmit descriptors across the configured number of transmit channels. Typically, you think of a one-to-one association between a transmit channel and a VC; however the ATM CES port adapter supports other types of VCs than data VCs (for example CES VCs). Also, the ATM CES port adapter can multiplex one or more VCs over a shaped single virtual path (VP) that only requires a single transmit channel. Therefore, the term transmit channel is used rather than virtual circuit.
To set the number of transmit descriptors, perform the following task in interface configuration mode:
| Task | Command |
|---|---|
Select the maximum number of channels for atmces | atm max-channels number |
The maximum burst of packets that are allowed per VC is limited by the number of transmit descriptors allocated per VC. Because the total number of transmit descriptors available is limited by the available SRAM space, configuration of the maximum number of transmit channels for the interface determines the number of transmit descriptors for each transmit channel. Hence, the burst size for each transmit channel is determined by the atm max-channels command. For example, for 64 numbers of transmit channels for the interface, 255 transmit descriptors are associated per transmit channel; for 512 numbers of transmit channels for the interface, 31 transmit descriptors are associated per transmit channel.
The default value for atm max-channels is based on the NPE being used in the router. In a router using NPE-150, atm max-channels is set to 64; in a router using NPE-200, atm max-channels is set to 256.
To display information on the transmit channels, use the show atm interface atm EXEC command.
After configuring the new interface, you can display its status. You can also display the current state of the ATM network and connected virtual circuits. To show current virtual circuits and traffic information, perform the following tasks in EXEC mode:
| Task | Command |
|---|---|
Display ATM-specific information about an ATM interface. | show atm interface atm slot/0 |
Display the configured list of ATM static maps to remote hosts on an ATM network. | |
Display information about global traffic to and from all ATM networks connected to the router. Display a list of counters of all ATM traffic on this router. | |
Display ATM virtual circuit information about all PVCs and SVCs (or a specific virtual circuit). | show atm vc [vcd] |
Display statistics for the ATM interface. | show interface atm slot/0 |
Display SSCOP details for the ATM interface. | |
Display ATM ARP server table. | show atm arp-server |
Display ATM ILMI information. | show atm ilmi |
The ATM CES port adapter supports the traffic shaping parameters defined in Table 5-1. This ensures that generated traffic conforms to the Available Bit Rate (ABR) service category specified in the ATM Forum Traffic Management Specification Version 4.0.
| Traffic Parameter | Range | Default | Note |
|---|---|---|---|
Peak rate | 1 kbps to 155 Mbps | If not defined, each new VC is set to the maximum physical layer rate. | - |
Average rate | 0< avg < peak | Average = peak rate. | - |
Maximum burst size | 1 to 64,000 | Equal to the ATM CES port adapter's MTU size. (User-configurable on ATM interface only.) | - |
Minimum rate | 0 to peak | 0 | Used for ABR PVCs |
The ATM CES port adapter supports multiplexing of one or more virtual channels (VCs) over a virtual path (VP) that is shaped at a constant bandwidth. To use this feature, you configure a permanent virtual path (PVP) with a specific virtual path identifier (VPI). Any VCs that are created subsequently with the same VPI are multiplexed onto this VP; the traffic parameters of individual VCs are ignored.
The traffic shaping conforms to the peak rate that is specified when you create the VP. Any number of data VCs can be multiplexed onto a VP. However, the number of CES VCs that are multiplexed depends on the bandwidth requirement. Because of this requirement, the CES VCs cannot be oversubscribed.
PVP creation, by default, creates two VCs (vci=3 and vci=4). These VCs are created for VP end-to-end loopback and segment loopback OAM support.
To create a permanent virtual path (PVP), perform the following task in interface configuration mode:
| Task | Command |
|---|---|
Create a PVP | atm pvp vpi [peak-rate] |
The vpi value is the virtual path identifier to be associated with the PVP (valid values are in the range 0 to 255 inclusive). The peak rate argument is the maximum rate (in kbps) at which the PVP is allowed to transmit. Valid values are in the range 84 kbps to line rate (155,000 kbps for OC-3, 45,000 kbps for DS3, and 34,000 kbps for E3) with line rate being the default.
This command will be rejected if a nonmultiplexed VC with the specified vpi value already exists. This could happen if a VC is created first with a given vpi value and then you subsequently enter this command.
To delete a permanent virtual path (PVP), perform the following task in interface configuration mode:
| Task | Command |
|---|---|
Delete a PVP | no atm pvp vpi |
The vpi value is the virtual path identifier to be associated with the PVP (valid values are in the range 0 to 255 inclusive). This command will be rejected if there are existing VCs using the specified VPI.
The following example shows a typical configuration for the ATM CES port adapter with VP shaping on a Cisco 7200 series router.
router(config)# interface atm2/0 router(config-if)# atm pvp 1 2000 router(config-if)# atm pvc 13 1 13 aal5snap router(config-if)# interface cbr2/0 router(config-if)# ces circuit 0 router(config-if)# ces pvc 0 interface atm2/0 vpi 1 vci 100 router(config-if)# ^Z
The above sequence creates a VP with the vpi value of 1 and with a peak rate of 2000 kbps. The subsequent VCs created, one data VC and one CES VC, are multiplexed onto this VP.
After configuring the new interface, you can display the statistics for all VPs on an interface by using the show atm vp command. You can also display the statistics for a given VP by using the show atm vp command with a vpi value, as in the following example:
router# show atm vp 1
ATM2/0 VPI: 1, PeakRate: 155000, CesRate: 1742, DataVCs: 1, CesVCs:1, Status: ACTIVE
VCD VCI Type InPkts OutPkts AAL/Encap Status
1 100 PVC n/a n/a CES-AAL1 ACTIVE
13 13 PVC 0 0 AAL5-SNAP ACTIVE
409 3 PVC 0 0 F4 OAM ACTIVE
410 4 PVC 0 0 F4 OAM ACTIVE
TotalInPkts: 0, TotalOutPkts: 0, TotalInFast: 0, TotalOutFast: 0, TotalBroadcasts: 0
This completes the procedures for configuring the ATM CES port adapter in supported configuration modes without CES services. Proceed to the "Testing and Troubleshooting the ATM CES Port Adapter" section.
This section presents information for configuring the ATM CES port adapter for both unstructured and structured CES services. Read the information in this section before attempting to configure an ATM CES port adapter. See "Overview," for more information on the ATM CES port adapter.
Two methods are available for configuring an ATM CES port adapter for use in a Cisco 7200 series router or a Cisco uBR7246 operating environment:
The configuration procedures throughout this document are based on the following assumptions and conventions. These sample procedures demonstrate typical or common configuration tasks and may not reflect your particular ATM CES port adapter configuration requirements.
router# prompt, which indicates that the chassis is ready to receive interface configuration commands).
You will encounter the following prompts in the configuration procedures:
router>
router#
router(config)#
router(config-if)#
To establish a command session with a target Cisco 7200 series router or Cisco uBR7246, take any one of the following actions, as appropriate:
Router> enable password: XXXXXXXX (privileged EXEC mode password) Router#
switch> ping router router is alive switch> telnet router Trying 172.27.32.146 ... Connected to router. Escape character is '^]'. User Access Verification Password: xxxxxxxx (your privileged EXEC mode password) router# router#
sun% ping router router is alive sun% telnet router Trying 172.27.32.146 ... Connected to router. Escape character is '^]'. User Access Verification Password: xxxxxxxx (your privileged EXEC mode password) router# router#
Having established a privileged command session on the target chassis, you can begin the configuration of the ATM CES port adapter. Proceed to the "Configuring the ATM CES Port Adapter for Unstructured CES Services" section.
Before attempting to configure your ATM CES port adapter for service, see the "For More Information" section, for related documentation about the Cisco 7200 series router and the Cisco uBR7246 network clock synchronization services and the various clocking modes applicable to the handling of CBR traffic in an ATM networking environment.
To establish the sources and priorities of the requisite clocking signals for an ATM CES port adapter in a Cisco 7200 series router or Cisco uBR7246, perform the following steps:
Step 1 At the privileged EXEC mode prompt, enter the following command:
router# configure terminal router(config)#
Step 2 To establish a priority 1 clock source for an ATM port, enter the following command at the global configuration mode prompt:
router(config)# network-clock-select 1 cbr 2/0 router(config)#
This command establishes a priority 1 clock source for port 0 on the ATM CES port adapter.
Step 3 To establish a priority 2 clock source for an ATM port, enter the following command:
router(config)# network-clock-select 2 atm 2/0 router(config)#
This command establishes a priority 2 clock source for port 0 on the ATM port adapter.
Step 4 At the global configuration mode prompt, enter the following command:
router(config)# ^Z router#
This command returns you to the privileged EXEC mode prompt.
You can specify up to four network clock sources for a Cisco 7200 series router or Cisco uBR7246. The highest priority active port in the chassis supplies PRS to all other chassis interfaces that require network clock synchronization services.
To verify the clock signal sources and priorities that you established in the previous procedure for your ATM CES port adapter, issue the following command at the privileged EXEC mode prompt:
router# show network-clocks Priority 1 clock source: CBR 2/0 down Priority 2 clock source: ATM 2/0 down Priority 3 clock source: not configured Priority 4 clock source: not configured Priority 5 clock source: Local oscillator Current clock source:Local oscillator, priority:5 router#
This command displays the priorities and clock sources currently configured for your Cisco 7200 series router or Cisco uBR7246. Under normal operating conditions, the priority 1 clock source is assumed to be the active source.
The Cisco 7200 series router and the Cisco uBR7246 distribute the clocking signal derived from the network clock source to all the ports on the chassis that require network clock synchronization services. To direct a CBR port to use the network-derived clock, issue the ces dsx1 clock source network-derived command, as shown in Step 3 of the "Configuring a Hard PVC (with Synchronous Clocking)" section.
The CBR ports support the framing formats and line coding options indicated in Table 5-2.
| ATM CES Port Adapter | Framing Format | Line Coding Options |
|---|---|---|
T1 | Super frame (SF) Extended super frame (ESF) | ami or b8zs (b8zs is default) |
E1 (120 ohm) | E1 CRC multiframe e1_crc_mf_lt Configure line type to e1_crc_mf, without CAS enabled. E1 CRC multiframe e1_crc_mfCAS_lt Configure line type to e1_crc_mf, with CAS enabled. E1 e1_lt E1 multiframe e1_mfCAS_lt | ami or hdb3 (hdb3 is default) |
Before you configure new interfaces for an ATM CES port adapter, you might want to determine which CBR interfaces have already been configured for CES in your router. To do so, issue the following command at the privileged EXEC mode prompt:
router# show ces stat
The following is an example of the display that results when you issue the command:
Interface IF Admin Port Channels in
Name Status Status Type use
------------- -------- --------- ----------- -----------
CBR2/0 UP UP T1 1
CBR2/1 UP UP T 1
CBR6/2 UP UP T1 1-24
CBR6/3 UP UP T1
router#
As the example indicates, this command displays key information on the presently configured CBR interfaces in your router. In this particular case, the output shows that an ATM CES port adapter is installed in chassis slot 2 and that all four CBR ports (0 to 3) are configured for service.
Use the following commands to manually change any of the default configuration values:
| Task | Command |
|---|---|
At the privileged EXEC prompt, enter configuration mode from the terminal. | configure [terminal] |
Specify an ATM CES port adapter interface and enter interface configuration mode. | interface cbr slot/port |
Configure the type of clocking. | ces aal1 clock {adaptive | srts | synchronous} |
Configure the service type. | ces aal1 service {structured | unstructured} |
Configure the DSX-1 clock source. | ces dsx1 clock source {loop-timed | network-derived} |
Configure the DSX-1 framing type (T1). | ces dsx1 framing {sf | esf} |
Configure the DSX-1 framing type (E1). | ces dsx1 framing {e1_crc_mfCAS_lt | e1_crc_mf_lt | e1_lt | e1_mfCAS_lt} |
Configure the DSX-1 line build out. | ces dsx1 lbo {0_110 | 110_220 | 220_330 | 330_440 | 440_550 | 550_660 | 660_above | square_pulse} |
Configure the DSX-1 line code type (T1). | ces dsx1 linecode {ami | b8zs} |
Configure the DSX-1 line code type (E1). | ces dsx1 linecode {ami | hdb3} |
Configure the DSX-1 loopback test method. | ces dsx1 loopback {line | noloop | payload} |
Configure the circuit cell delay variation. | ces circuit 0 [cdv 1-65535] |
Configure the PVC. | ces pvc 0 interface atm slot/port [vpi 0-4095 vci 1-16383] |
This section presents the command-based procedures you use in configuring ATM CES port adapters for unstructured (clear channel) CES services.
A circuit that you set up on a T1 or E1 CBR port for unstructured CES service is always identified as "circuit 0," because only one such circuit can be established on any given CBR port. Such a circuit consumes the entire bandwidth of a T1 port (1.544 Mbps) or an E1 port (2.048 Mbps), which is provisioned manually at the time you set up the unstructured circuit and remains dedicated to that port, regardless of whether or not that port is actively transmitting CBR data.
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 CBR interfaces. (It is the clocking mode appropriate to most CES applications.) Accordingly, you may want to go directly to the "Configuring a Hard PVC (with Synchronous Clocking)" section.
An ATM CES port adapter converts CBR traffic into ATM cells for propagation through an ATM network. The ATM cell stream is directed to either an outgoing ATM port or CBR port. If the outgoing port is an ATM port on the same router, the PVC is called a "hard PVC."
As a general rule, when you are setting up a hard PVC, you must interconnect a CBR port and an ATM port in the same router.
For procedural purposes, assume that a CBR port (identified as CBR2/0) and an ATM port (identified as ATM2/0) are the two interfaces to be involved in the hard PVC; assume further that this hard PVC will use adaptive clocking.
To set up a hard PVC that satisfies the above assumptions, perform the following steps:
Step 1 At the privileged EXEC mode prompt for the target chassis, enter the following command:
router# configure terminal router(config)#
This command sets the chassis to global configuration mode; terminal is a keyword that identifies the terminal (console) as the source of subsequent configuration commands.
Step 2 At the global configuration mode prompt, enter the following command:
router(config)# interface CBR2/0 router(config-if)#
This command sets the router to interface configuration mode and identifies interface CBR2/0 as the chassis element to which subsequent configuration commands are to be applied.
This command also causes router software to assign particular VPI and VCI values automatically to the source port (CBR2/0) (see Figure 5-5). 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 CBR2/0 parameter is the port ID for the port adapter---which tells you that the ATM CES port adapter is installed in chassis slot 2.
Step 3 At the interface configuration mode prompt, enter the following commands:
router(config-if)# no shutdown router(config-if)# ces aal1 service unstructured router(config-if)# ces aal1 clock adaptive
The first command places the CBR ports in an operationally "up" (operational) state, enabling all CES functions on the port adapter.
The second command directs the port adapter to perform unstructured CES services.
The third command directs the port adapter to use adaptive clocking.
Step 4 To define the destination port (ATM2/0) for the hard PVC, enter the following commands:
router(config-if)# ces circuit 0 circuit-name CBR-PVC-A router(config-if)# ces pvc 0 interface ATM 2/0 vpi 0 vci 100 router(config-if)# ^Z router#
In this example, the first command identifies the hard PVC as "circuit 0" and assigns it the logical circuit name "CBR-PVC-A" (see Figure 5-5). 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:#. Here the default name for this particular circuit would be "CBR2/0:0," 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).
The second command identifies a particular port adapter, ATM port, and VPI/VCI value for the destination end of the hard PVC (see Figure 5-5).
The third command exits from the interface configuration mode and returns you to the privileged EXEC mode prompt.
After the preceding procedure is performed, a hard PVC (circuit number 0) named CBR-PVC-A exists between the specified CBR source port and the specified destination ATM port.
This CES circuit enables bidirectional, unstructured CBR traffic to flow between the CBR interfaces and the ATM interface. Figure 5-5 is a logical representation of this circuit.
To verify the hard PVC established in the procedure above, perform the following steps:
Step 1 To display the configured CES-IWF ATM address(es) for your router, enter the following command at the privileged EXEC mode prompt:
router# show ces address
Following is a sample display that results when you issue the command:
CES-IWF ATM Address(es): 00.0000.0000.0000.0000.0000.0000.0000.0000.0000.00 CBR2/0:1 vpi 0 vci 100 router#
This command displays the CES-IWF ATM address for the destination end of the circuit named CBR-PVC-A (see Figure 5-5). This address results from Step 4 in the "Configuring a Hard PVC (with Adaptive Clocking)" section.
Step 2 To display basic information about the hard PVC, enter the following command:
router# show ces circuit int cbr 2/0
Following is a sample display that results when you issue the command:
Interface Circuit Circuit-Type X-interface X-vpi X-vci Status CBR2/0 1 HardPVC ATM2/0 0 1000 UP router#
This command verifies the source and destination port IDs of the hard PVC and indicates that the circuit is functional (in an operationally "up" state).
Step 3 To display detailed information about the hard PVC, enter the following command:
router# show ces circuit int cbr 2/0 1
Following is a sample display that results when you issue the command:
Circuit: Name CBR2/0:1, Circuit-state ADMIN_UP / Interface CBR2/0, 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 Channels used by this circuit: 1 Cell-Rate: 171, Bit-Rate 64000 cas OFF, cell_header 0x3E80 (vci = 1000) Configured CDV 2000 usecs, Measured CDV unavailable De-jitter: UnderFlow unavailable, OverFlow unavailable ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0 state: VcActive, maxQueueDepth 128, startDequeueDepth 111 Partial Fill: 47, Structured Data Transfer 24 HardPVC src: CBR2/0 vpi 0, vci 16 Dst: ATM2/0 vpi 0, vci 1000 router#
This command displays all the configuration information relevant to the hard PVC that you set up in the preceding section.
The "Port-Type" field in the second line of the sample display above identifies the type of CBR port that you have configured (which, in this case, is a T1 interface).
Any hard PVC that you set up for unstructured CES services always carries the circuit identifier "Circuit_id 1," as shown in the first line of the sample display above. There can be only one such circuit in an unstructured hard PVC.
In other words, a hard PVC that you set up for unstructured CES services on any CBR port is always labeled circuit 0, because the entire bandwidth of the T1 port is dedicated to that circuit.
For consistency, the following procedure includes references to the same port IDs that you used in setting up a hard PVC in the "Configuring a Hard PVC (with Adaptive Clocking)" section.
To set up a hard PVC on a router with synchronous clocking, perform the following steps:
Step 1 At the privileged EXEC mode prompt, enter the following command:
router# configure terminal router(config)#
Step 2 At the resulting global configuration mode prompt, enter the following command:
router(config)# interface cbr 2/0 router(config-if)#
This command sets the router to interface configuration mode and identifies interface CBR2/0 as the chassis element to which subsequent configuration commands are to be applied.
Step 3 At the interface configuration mode prompt, enter the following commands:
router(config-if)# ces dsx1 clock source network-derived router(config-if)# ces circuit 1 shutdown router(config-if)# ces aal1 clock synchronous router(config-if)# no ces circuit 1 shutdown router(config-if)# ^Z router#
The first command directs interface CBR2/0 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.
The second command temporarily disables all functions relating to circuit 1 on port CBR2/0.
The third command defines the synchronous clocking mode for use by port CBR2/0.
The fourth command enables all functions for circuit 1 on the ATM CES port adapter.
The last command exits from the interface configuration mode and returns you to the privileged EXEC mode prompt.
To verify the configuration information for a hard PVC with synchronous clocking, enter the following command at the privileged EXEC mode prompt:
router# show ces circuit int cbr 2/0 1
Following is a sample display that results when you issue the command:
Circuit: Name CBR2/0:1, Circuit-state ADMIN_UP / Interface CBR2/0, 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 Channels used by this circuit: 1 Cell-Rate: 171, Bit-Rate 64000 cas OFF, cell_header 0x3E80 (vci = 1000) Configured CDV 2000 usecs, Measured CDV unavailable De-jitter: UnderFlow unavailable, OverFlow unavailable ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0 state: VcActive, maxQueueDepth 128, startDequeueDepth 111 Partial Fill: 47, Structured Data Transfer 24 HardPVC src: CBR2/0 vpi 0, vci 16 Dst: ATM2/0 vpi 0, vci 1000 router#
The sample display 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 fully functional ("up").
In this section, it is assumed that you are referencing the same port IDs (CBR2/0 and CBR2/1) as those used in previous procedures.
To delete a previously configured PVC, perform the following steps:
Step 1 At the privileged EXEC mode prompt, enter the following command:
router# show ces circuit Interface Circuit Circuit-Type X-interface X-vpi X-vci Status CBR2/0 1 HardPVC ATM2/0 0 1000 UP CBR2/1 1 HardPVC ATM2/1 0 1000 UP router#
This command displays the CES circuits currently in effect.
Step 2 To establish global configuration mode and identify the console as the source of user input, enter the following command:
router# configure terminal router(config)#
Step 3 At the global configuration mode prompt, enter the following command:
router(config)# interface cbr 2/0 router(config-if)#
This command sets the router to interface configuration mode and identifies port CBR2/0 as the chassis element to which subsequent configuration commands are to be applied.
Step 4 At the interface configuration mode prompt, enter the following commands:
router(config-if)# no ces circuit 0 router(config-if)# exit router(config)#
The first command deletes the previously configured CES circuit on port 0.
The second command causes you to exit from interface configuration mode and returns you to the global configuration mode.
Step 5 At the global configuration mode prompt, enter the following command:
router(config)# interface cbr 2/1 router(config-if)#
This command sets the Cisco 7206 router to the interface configuration mode and identifies port CBR2/1 as the chassis element to which subsequent configuration commands are to be applied.
Step 6 At the interface configuration mode prompt, enter the following commands:
router(config-if)# no ces circuit 0 router(config-if)# exit router(config)# ^Z router#
The command deletes the previously configured CES circuit on port 1.
The second command exits from interface configuration mode and returns you to global configuration mode.
The third command exits from global configuration mode and returns you to the privileged EXEC mode prompt.
This procedure is based on the actions taken in the preceding section. It enables you to verify the deletion of a previously configured circuit.
To verify the deletion of a previously established PVC, perform the following steps:
Step 1 At the privileged EXEC mode prompt, enter the following command:
router# show ces circuit router#
The absence of output in response to the show ces circuit command verifies that the CES circuit has been deleted.
Step 2 Similarly, at the privileged EXEC mode prompt, enter the following command:
router# show ces address CES-IWF ATM Address(es): router#
Again, the absence of output in response to the show ces address command verifies that the previous CES-IWF addresses have been deleted.
This section presents the command-based procedures you use in configuring ATM CES port adapters for T1/E1 structured (N x 64 kbps) CES services.
Structured CES services differ from unstructured CES services in that the structured services allow you to allocate T1/E1 bandwidth in a highly flexible and efficient manner. With the structured services, you use only the T1/E1 bandwidth actually required to support the active structured circuit(s) that you configure.
For example, in configuring an ATM CES port adapter for structured service, you can define multiple hard PVCs for any given ATM CES port adapter's T1/E1 port. The ATM CES port adapter provides up to 24 DS0 time slots per T1/E1 port for defining structured CES circuits. In order to see the bandwidth that is required on an ATM link for this particular circuit, use the show ces circuit interface command.
In the ATM CES port adapter, any bits not available for structured CES services are used for framing and out-of-band control.
With structured CES services, you can invoke a function called channel associated signaling (CAS) that enables you to detect "on hook" and "off hook" conditions for any given structured CES circuit. The "on hook" state indicates that the CES circuit is idle (unconnected). The "off hook" state indicates that the circuit is in use (connected).
The CAS mechanism allows T1/E1 bandwidth to be dynamically allocated and released by hard PVCs that you have configured for structured CES services.
For simplicity in demonstrating configuration tasks for structured CES services, the procedures in this section are directed primarily at setting up a single CES circuit per T1/E1 port. However, these procedures outline the essential steps and command syntax that you would use if you were to set up multiple CES circuits on a T1/E1 port.
Structured CES services require network clock synchronization by means of the synchronous clocking mode. You must select the clock source and define its priority locally for each Cisco 7200 series router or Cisco uBR7246 in your network. You do this using the network-clock-select command. See the "Defining Clock Sources and Priorities for an ATM CES Port Adapter" section.
For continuity, the structured CES configuration procedures in this section are based on the conventions outlined in the "Conventions Adopted for ATM CES Port Adapter Configuration Procedures" section. Also, the assumptions pertaining to a particular structured CES configuration task are listed at the beginning of the procedure.
Three assumptions are made here regarding the configuring of a hard PVC for structured CES services:
To set up a hard PVC for structured CES services according to these three assumptions, perform the following steps:
Step 1 At the privileged EXEC mode prompt, enter the following command:
router# configure terminal
This command sets the router to 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 following command:
router(config)# interface cbr 2/0
This command sets the router to interface configuration mode and identifies port CBR2/0 as the chassis element to which subsequent configuration commands will be applied. In effect, this port becomes the source port of the hard PVC (see Figure 5-6).
The VPI/VCI values shown for the source port in Figure 5-6 are automatically (implicitly) assigned by port adapter hardware. These values are hardware-dependent entities that uniquely identify the port being configured.
Step 3 At the interface configuration mode prompt, enter the following command:
router(config-if)# ces dsx1 clock source network-derived
This command directs port CBR2/0 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. Therefore, you must set the CBR port to use this clocking signal for synchronizing CBR data transport.
Step 4 To direct the port to support B8ZS coding for the DSX-1 physical layer, enter the following command:
router(config-if)# ces dsx1 linecode b8zs
Step 5 To direct the port to use the extended super frame (ESF) framing format for the T1/E1 interface, enter the following command:
router(config-if)# ces dsx1 framing esf
Step 6 To enable the port, enter the following command:
router(config-if)# no shutdown
Step 7 To establish structured CES services for the port, enter the following command:
router(config-if)# ces aal1 service structured
Step 8 To establish the synchronous clocking mode for the port, enter the following command:
router(config-if)# ces aal1 clock synchronous
At the conclusion of this step, you have completed the configuration of the desired port for the structured CES circuit. You can now create the hard PVC.
Step 9 To specify the four DS0 time slots to be used by the hard PVC, enter the following command:
router(config-if)# ces circuit 1 timeslots 1-3,7
Step 10 To give the hard PVC a logical name by which it will be identified, enter the following command:
router(config-if)# ces circuit 1 circuit-name CBR-PVC-A
The logical name CBR-PVC-A 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:# for the circuit being configured.
The default name for this particular circuit is "CBR2/0:1," where the notation preceding the colon uniquely identifies the port, and the number following the colon uniquely identifies the circuit being configured. For structured CES services, the circuit number sequence always begins at 1 for each port in an ATM CES port adapter.
Step 11 To enable the hard PVC, enter the following command:
router(config-if)# no ces circuit 1 shutdown
Step 12 To define the destination end of the hard PVC and exit from interface configuration mode, enter the following commands:
router(config-if)#ces pvc 1 interface atm 2/0 vpi 0 vci 100router(config-if)#^Z router#
These commands define a particular ATM port as the destination end of the hard PVC and return you to the privileged EXEC mode prompt.
This completes the procedure for creating a hard PVC configured for structured CES services.
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:
router# show ces address CES-IWF ATM Address(es): 00.0000.0000.0000.0000.0000.0000.0000.0000.0000.00 CBR2/0:1 vpi 0 vci 100 router#
This command displays the 20-byte CES-IWF ATM address assigned to the source end of the hard PVC. This address is automatically (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 following command:
router# show ces circuit Interface Circuit Circuit-Type X-interface X-vpi X-vci Status CBR2/0 1 HardPVC ATM2/0 0 1000 UP router#
Step 3 To display the interface details for port CBR2/0, enter the following command:
router# show ces circuit int cbr 2/0 1 Circuit: Name CBR2/0:1, Circuit-state ADMIN_UP / Interface CBR2/0, 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 Channels used by this circuit: 1 Cell-Rate: 171, Bit-Rate 64000 cas OFF, cell_header 0x3E80 (vci = 1000) Configured CDV 2000 usecs, Measured CDV unavailable De-jitter: UnderFlow unavailable, OverFlow unavailable ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0 state: VcActive, maxQueueDepth 128, startDequeueDepth 111 Partial Fill: 47, Structured Data Transfer 24 HardPVC src: CBR2/0 vpi 0, vci 16 Dst: ATM2/0 vpi 0, vci 1000 router#
The procedures in this section build on the configuration information already established for the hard PVC created in the "Configuring a Hard PVC for Structured CES Services (without CAS)" section.
The only difference between the earlier procedure and the one that follows is that the latter enables CAS for the hard PVC.
The following procedure is based on five assumptions:
To set up a hard PVC for structured CES services with CAS according to these five assumptions, perform the following steps:
Step 1 At the privileged EXEC mode prompt, enter the following command:
router# configure terminal
This command sets the Cisco 7200 series router or the Cisco uBR7246 to global configuration mode and identifies the console (terminal) as the source of configuration commands.
Step 2 At the global configuration mode prompt, enter the following command:
router(config)# interface cbr 2/0
router(config-if)#
This command sets the Cisco 7200 series router or Cisco uBR7246 to interface configuration mode and identifies port CBR2/0 as the chassis element to which configuration commands are to be applied. In effect, this port is the source port for the hard PVC.
Step 3 At the configuration interface mode prompt, enter the following commands:
router(config-if)# ces dsx1 signalmode robbedbit router(config-if)# ces circuit 1 shutdown router(config-if)# ces circuit 1 cas router(config-if)# no ces circuit 1 shutdown router(config-if)#
The first command sets the signaling mode for the CBR port to "robbedbit."
The second command temporarily disables the CBR port.
The third command enables CAS for the CES circuit.
The fourth command re-enables the CBR port to make it fully operational.
By performing this procedure, you create a hard PVC configured for structured CES services (with CAS).
To verify the hard 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 following command at the privileged EXEC mode prompt:
router# show ces circuit Interface Circuit Circuit-Type X-interface X-vpi X-vci Status CBR2/0 1 HardPVC ATM2/0 0 100 UP router#
Step 2 To display the interface details for the source port (CBR2/0), enter the following command:
router# show ces circuit interface cbr 2/0 1 Circuit: Name CBR-PVC-A, Circuit-state ADMIN_UP / Interface CBR2/0, 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 Channels used by this circuit: 1 Cell-Rate: 179, Bit-Rate 64000 cas ON, cell_header 0x640 (vci = 100) Configured CDV 2000 usecs, Measured CDV unavailable De-jitter: UnderFlow unavailable, OverFlow unavailable ErrTolerance 8, idleCircuitdetect OFF, onHookIdleCode 0x0 state: VcLoc, maxQueueDepth 128, startDequeueDepth 111 Partial Fill: 47, Structured Data Transfer 25 HardPVC src: CBR2/0 vpi 0, vci 16 Dst: ATM2/0 vpi 0, vci 100 router#
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 configuring such a circuit are presented in the "Configuring a Hard PVC for Structured CES Services (with CAS Enabled)" section.
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 using the following CLI command:
router# CES circuit 1 on-hook-detect 2
The parameter 2 in the command example above is a decimal representation of the four hexadecimal ABCD bits of the CAS mechanism. For 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. They are determined by the manufacturer of the voice/video telephony device that is generating the CBR traffic. That is why the ABCD bits of the CAS mechanism are said to be user-configurable.
After configuring the new CES interface, you can display its status. You can also display the current state of the ATM CES port adapter and connected virtual circuits. To show current virtual circuits and traffic information, perform the following tasks in EXEC mode:
| Task | Command |
|---|---|
Display the CES-IWF ATM addresses that are currently configured. | show ces address |
Display high-level circuit status for all interfaces. | show ces circuit |
Display detailed CES port information. | |
Display high-level CES port information. | show ces stat |
Display the configured list of ATM static maps to remote hosts on an ATM network. | |
Display statistics for the CES interface. | show interface cbr slot/0 |
Following are suggested guidelines for troubleshooting the ATM CES port adapter. Use the debug commands to help solve network problems and the show commands to display the current state of the network.
The ATM CES port adapter maintains a count of certain errors. In addition to keeping a count of these errors, the ATM CES port adapter also snapshots the last VCI/VPI that caused the error. Each ATM CES port adapter error counter is 16 bits.
Errors counted include the following:
The following debug commands can be used to help solve ATM network problems:
To create a dump of all ATM packets, use the debug atm packet command:
debug atm packet
This command displays the contents of the SNAP/NLPID header, followed by the first 40 bytes of a packet in hexadecimal format.
To display errors, use the debug atm packet command:
debug atm errors
This command displays information from all detected ATM errors. This includes such errors as encapsulation failures and errors during ATM configuration.
To display ATM events, use the debug atm events command:
debug atm events
This command displays event changes to the ATM CES port adapter. Reset, VC configurations, and ATM CES port adapter configurations are displayed here.
To display information about OAM cells, use the debug atm oam command:
debug atm oam
This command displays the contents of OAM cells as they arrive from the network.
After using a debug command, turn off debugging with the no debug command.
ATM show commands display the current state of the ATM network and the connected VCs.
To show current VCs and traffic information, use the show atm vc command:
show atm vc [vcd]
Specifying a VCD displays specific information about that VCD.
To show current information about an ATM interface, use the show atm interface atm slot/0 command:
show atm interface atm slot/0
To show current ATM traffic, use the show atm traffic command:
show atm traffic
This command displays global information about traffic moving to and from all ATM networks connected to the router.
To show the current ATM mapping, use the show atm map command:
show atm map
This command displays the active list of ATM static maps to remote hosts on an ATM network.
The show controllers command displays the internal status of each port adapter slot location.
router# sh controllers atm2/0 Interface ATM2/0 Hardware is ATM-CES PCI registers: bus_no=13, device_no=0 CFID=0xA102104C, CFCS=0x02000006, CFRV=0x02030001, CFLT=0x0000FF00 CFBA=0x4E000000, CFIT=0x02010100 bus_no=13, device_no=2 CFID=0x000E1137, CFCS=0x04000002, CFRV=0x00000201, CFLT=0x00000000 CFBA=0x4E120000, CFIT=0x00000000 (display text omitted)
The show atm vc command displays the following values for all PVCs:
router# show atm vc
AAL / Peak Avg. Burst
Interface VCD VPI VCI Type Encapsulation Kbps Kbps Cells Status
ATM2/0 1 0 16 PVC AAL5-ILMI 155000 155000 94 ACTIVE
ATM2/0 2 0 5 PVC AAL5-SAAL 155000 155000 94 ACTIVE
ATM2/0.1 303 0 282 SVC LANE-LES 155000 155000 32 ACTIVE
ATM2/0.1 304 0 281 SVC LANE-LEC 155000 155000 32 ACTIVE
ATM2/0.1 307 0 286 MSVC LANE-LEC 155000 155000 32 ACTIVE
ATM2/0.1 308 0 285 MSVC LANE-LES 155000 155000 32 ACTIVE
ATM2/0.1 309 0 288 SVC LANE-BUS 155000 155000 32 ACTIVE
ATM2/0.1 310 0 287 SVC LANE-LEC 155000 155000 32 ACTIVE
ATM2/0.1 311 0 290 MSVC LANE-LEC 155000 155000 32 ACTIVE
ATM2/0.1 312 0 289 MSVC LANE-BUS 155000 155000 32 ACTIVE
ATM2/0.1 314 0 292 SVC LANE-LES 155000 155000 32 ACTIVE
ATM2/0.1 315 0 293 SVC LANE-BUS 155000 155000 32 ACTIVE
Use the show atm vc n command, where n is the vcd, to display statistics for a given data or CES VC.
For example, for CES VCs:
router# show atm vc 1 ATM2/0: VCD: 1, VPI: 10, VCI: 10, etype:0x0, CES - AAL1, Flags: 0x20138 PeakRate: 2310, Average Rate: 2310, Burst Cells: 94, VCmode: 0x0 OAM DISABLED, InARP DISABLED Received Cells: 0, Transmit Cells: 334272 Status: ACTIVE
For data VCs:
router# show atm vc 4 ATM2/0: VCD: 4, VPI: 4, VCI: 4, etype:0xBAD, AAL5 - MUX, Flags: 0x34 PeakRate: 0, Average Rate: 0, Burst Cells: 0 *32cells, VCmode: 0xE200 InPkts: 164, OutPkts: 0, InFast: 0, OutFast: 0, Broadcasts: 0 Status: ACTIVE
Use the show interfaces command without arguments to display statistics for all interfaces in the system. Use the show interfaces atm slot/port command to display statistics for the ATM interface you specify by its slot/port address. For example:
router# show int atm 2/0 ATM interface ATM2/0: AAL enabled: AAL5 , Maximum VCs: 2048, Current VCCs: 3 Maximum Transmit Channels: 64 Tx buffers 256, Rx buffers 256, Exception Queue: 32, Raw Queue: 32 VP Filter: 0x7B, VCIs per VPI: 1024, Max. Datagram Size:4496 PLIM Type:SONET - 155Mbps, TX clocking: INTERNAL 0 input, 59 output, 0 IN fast, 0 OUT fast ABR parameters, rif: 16 rdf: 16 Config. is ACTIVE
Use the show atm map command to display the PVC map:
router# show atm map Map list test : PERMANENT ip 128.1.1.1 maps to VC 6 ip 128.1.1.2 maps to VC 6
Use the show atm traffic command to display the interface traffic:
router# show atm traffic 4915 Input packets 0 Output packets 2913 Broadcast packets 0 Packets for non-existent VC 0 Packets with CRC errors 0 OAM cells received 0 Cells lost
Use the show sscop command to display SSCOP details for the ATM interface.
The show version command displays the configuration of the system hardware (the number of each interface processor type installed), the software version, the names and sources of configuration files, and the boot images.
Router> show version Cisco Internetwork Operating System Software IOS (tm) 7200 Software (C7200-J-M), Version 11.1(14)CA Synced to mainline version: 11.1(9) Copyright (c) 1986-1997 by Cisco Systems, Inc. Compiled Tue 18-Feb-97 19:12 Image text-base: 0x600088F0, data-base: 0x6076E000 ROM: System Bootstrap, Version 11.1(11855) ROM: 7200 Software (C7200-BOOT-M), Version 11.1(472), RELEASE SOFTWARE (fc1) cisco 7206 (NPE150) processor with 57344K/8192K bytes of memory. R4700 processor, Implementation 33, Revision 1.0 (512KB Level 2 Cache) Last reset from power-on Bridging software. SuperLAT software copyright 1990 by Meridian Technology Corp). X.25 software, Version 2.0, NET2, BFE and GOSIP compliant. TN3270 Emulation software (copyright 1994 by TGV Inc). 8 Ethernet/IEEE 802.3 interfaces. 1 FastEthernet/IEEE 802.3 interface. 4 Serial network interfaces. 1 FDDI network interface. 1 ATM network interface. 125K bytes of non-volatile configuration memory. 1024K bytes of packet SRAM memory. 20480K bytes of Flash PCMCIA card at slot 0 (Sector size 128K). 4096K bytes of Flash internal SIMM (Sector size 256K). Configuration register is 0x0 (display text omitted)
The show protocols command displays the global (system-wide) and interface-specific status of any configured Layer 3 protocol.
The show running-config command displays the currently running ATM CES port adapter configuration in RAM. For example:
router# show running-config interface atm2/0 ip address 131.110.162.110 255.255.255.0 atm pvc 1 1 1 aal5mux ip atm pvc 3 3 3 aal5snap atm pvc 4 4 5 aal5snap 4000 3000 appletalk address 10.1 appletalk zone atm
The examples in the following sections illustrate how to configure an ATM interface on the Cisco 7200 series routers:
In the following example, PVC 5 is created on ATM interface 4/0. LLC/SNAP encapsulation is used over AAL5. The interface is at IP address 1.1.1.1 with 1.1.1.5 at the other end of the connection. The static map list named atm declares that the next node is a broadcast point for multicast packets from IP.
interface atm 4/0 ip address 1.1.1.1 255.255.255.0 atm pvc 5 0 10 aal5snap ip route-cache cbus map-group atm map-list atm ip 1.1.1.5 atm-vc 5 broadcast
The following example shows a typical ATM configuration for a PVC:
interface atm 4/0 ip address 172.21.168.112 255.255.255.0 map-group atm atm pvc 1 1 1 aal5snap atm pvc 2 2 2 aal5snap atm pvc 6 6 6 aal5snap atm pvc 7 7 7 aal5snap decnet cost 1 clns router iso-igrp comet ! router iso-igrp comet net 47.0004.0001.0000.0c00.6666.00 ! router igrp 109 network 172.21.0.0 ! ip domain-name CISCO.COM ! map-list atm ip 172.21.168.110 atm-vc 1 broadcast clns 47.0004.0001.0000.0c00.6e26.00 atm-vc 6 broadcast decnet 10.1 atm-vc 2 broadcast
Figure 5-7 illustrates a fully meshed network. Fully meshed indicates that any workstation can communicate with any other workstation. The configurations for Routers A, B, and C follow the figure. In this example, the routers are configured to use PVCs. The two map-list statements configured in Router A identify the ATM addresses of Routers B and C. The two map-list statements in Router B identify the ATM addresses of Routers A and C. The two map list statements in Router C identify the ATM addresses of Routers A and B.
Router A
ip routing ! interface atm 4/0 ip address 172.21.168.1 255.255.255.0 atm pvc 1 0 10 aal5snap atm pvc 2 0 20 aal5snap map-group test-a ! map-list test-a ip 172.21.168.2 atm-vc 1 broadcast ip 172.21.168.3 atm-vc 2 broadcast
Router B
ip routing ! interface atm 2/0 ip address 172.21.168.2 255.255.255.0 atm pvc 1 0 20 aal5snap atm pvc 2 0 21 aal5snap map-group test-b ! map-list test-b ip 172.21.168.1 atm-vc 1 broadcast ip 172.21.168.3 atm-vc 2 broadcast
Router C
ip routing ! interface atm 4/0 ip address 172.21.168.3 255.255.255.0 atm pvc 2 0 21 aal5snap atm pvc 4 0 22 aal5snap map-group test-c ! map-list test-c ip 172.21.168.1 atm-vc 2 broadcast ip 172.21.168.2 atm-vc 4 broadcast
The following example also shows a configuration for the fully meshed network in Figure 5-7, but in this example SVCs are used. (PVC 1 is the signaling PVC.)
Router A
interface atm 4/0 ip address 172.21.168.1 255.255.255.0 map-group atm atm nsap-address AB.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12 atm pvc 1 0 5 qsaal ! map-list atm ip 172.21.168.2 atm-nsap BC.CDEF.01.234567.890A.BCDE.F012.3456.7890.1334.13 ip 172.21.168.3 atm-nsap BC.CDEF.01.234567.890A.BCDE.F012.3456.7890.1224.12
Router B
interface atm 2/0 ip address 172.21.168.2 255.255.255.0 map-group atm atm nsap-address BC.CDEF.01.234567.890A.BCDE.F012.3456.7890.1334.13 atm pvc 1 0 5 qsaal ! map-list atm ip 172.21.168.1 atm-nsap AB.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12 ip 172.21.168.3 atm-nsap BC.CDEF.01.234567.890A.BCDE.F012.3456.7890.1224.12
Router C
interface atm 4/0 ip address 172.21.168.3 255.255.255.0 map-group atm atm nsap-address BC.CDEF.01.234567.890A.BCDE.F012.3456.7890.1224.12 atm pvc 1 0 5 qsaal ! map-list atm ip 172.21.168.1 atm-nsap AB.CDEF.01.234567.890A.BCDE.F012.3456.7890.1234.12 ip 172.21.168.2 atm-nsap BC.CDEF.01.234567.890A.BCDE.F012.3456.7890.1334.13
In the following example, an ATM interface is configured for SVCs by means of multipoint signaling:
interface atm 2/0 ip address 4.4.4.6 map-group atm_pri atm nsap-address de.cdef.01.234567.890a.bcde.f012.3456.7890.1234.12 atm multipoint-signaling atm pvc 1 0 5 qsaal ! map-list atm_pri ! ip 4.4.4.4 atm-nsap cd.cdef.01.234566.890a.bcde.f012.3456.7890.1234.12 broadcast ip 4.4.4.7 atm-nsap 31.3233.34.353637.3839.3031.3233.3435.3637.3839.30 broadcast
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