Configuring Virtual Connections

This chapter describes how to configure a typical ATM network after autoconfiguration has established the default network connections. The network configuration modifications described in this chapter are used to optimize your ATM network operation.

This chapter uses the following terminology:

Virtual channel (VC)---A generic term used to describe transport of ATM cells associated with a common unique identifier value.
Virtual channel link---A means of transporting ATM cells between a point where a VCI value is assigned and the point where that value is translated or terminated.
Virtual channel identifier (VCI)---Identifies a particular VC link for a given VPC.
Virtual channel connection (VCC)---A concatenation of VC links that extends between two points where the adaptation layer is accessed. VCCs allow user-to-user, user-to-network, or network-to-network information transfer. Cell sequence integrity is preserved for the cells belonging to the same VCC.
Virtual path (VP)---A generic term for a bundle of VC links: all the VC links in a bundle have the same end points.
Virtual path link---A group of VC links, identified by a common value VPI, between a point where the VPI value is assigned and the point where that value is translated or terminated.
Virtual path identifier (VPI)---Identifies a particular VP link.
Virtual path connection (VPC)---A concatenation of VP links that extends between two points where the VCI values are assigned and the point where those values are translated or removed. VPCs allow user-to-user, user-to-network, or network-to-network information transfer.

The characteristics of the VC, established when the VC is created, include the following:

Quality of service (QoS)
ATM adaption layer 5 (AAL5)
Peak and average transmission rates
Cell sequencing integrity

These switching features can be turned off with interface configuration commands; autonomous switching must be explicitly enabled per interface.

Note For a complete description of the commands mentioned in this chapter, refer to the LightStream 1010 ATM Switch Command Reference (11.2) publication.

To configure virtual connections, perform the following tasks:

Table 6-1 list the types of supported virtual connections.

Connection	Point-to- Point	Point-to- Multipoint	Transit	Terminate
Permanent virtual channel link (PVCL)	3	3	---	---
Permanent virtual path link (PVPL)	3	3	---	---
Permanent virtual channel (PVC)	3	3	3	3
Permanent virtual path (PVP)	3	3	3	---
Soft permanent virtual channel (Soft PVC)	3	---	3	---
Soft permanent virtual path (Soft PVP)	3	---	3	---
Switched virtual circuit (SVC)	3	3	3	3
Switched virtual path (SVP)	3	3	3	---

Table 6-1: Suppo rted LightStream 1010 Virtual Connection Types

Connection Point-to-
Point Point-to-
Multipoint Transit Terminate

Permanent virtual channel link (PVCL)

3

3

---

---

Permanent virtual path link (PVPL)

3

3

---

---

Permanent virtual channel (PVC)

3

3

3

3

Permanent virtual path (PVP)

3

3

3

---

Soft permanent virtual channel (Soft PVC)

3

---

3

---

Soft permanent virtual path (Soft PVP)

3

---

3

---

Switched virtual circuit (SVC)

3

3

3

3

Switched virtual path (SVP)

3

3

3

---

For an overview description of LightStream 1010 ATM switch configuration examples see the Light Stream 1010 ATM Switch Hardware Installation Guide publication. The LightStream 1010 ATM Switch Command Reference (11.2) publication provides the complete syntax for every switch configuration command and describes the no form of each command.

Configure Permanent Virtual Channel Connections

This section describes configuring LightStream 1010 VCCs. A VCC is established as a bidirectional facility to transfer ATM traffic between two ATM layer users. Figure 6-1 shows an example VCC between ATM user A and user D.

Figure 6-1: Virtual Channel Connection Example

Note The value of the VPIs and VCIs can change as the traffic is relayed through the ATM network.

Virtual Channel Connection Command Description

To configure a point-to-point VCC, use the following configuration commands. Use the no form of this command to remove an entry.

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal.

configure ¹
[terminal]

Select the interface to be configured.

interface atm card/subcard/port [.sub-inter #]

Configure the PVC.

atm pvc vpi [vci | any-vci²] [upc upc] [pd pd] [rx-cttr index] [tx-cttr index] interface atm card/subcard/port[.vpt #] vpi [vci | any-vci²] [upc upc]

¹This command is documented in the LightStream 1010 ATM Switch Command Reference (11.2) publication.
²The any-vci parameter is only available for ATM interface 2/0/0.

Task	Command
At the privileged EXEC prompt, enter configuration mode from the terminal.	configure ¹ [terminal]
Select the interface to be configured.	interface atm card/subcard/port [.sub-inter #]
Configure the PVC.	atm pvc vpi [vci \| any-vci²] [upc upc] [pd pd] [rx-cttr index] [tx-cttr index] interface atm card/subcard/port[.vpt #] vpi [vci \| any-vci²] [upc upc]

Note The row index for rx-cttr and tx-cttr must be configured before using this optional parameter. See the section "Configure the Connection Traffic Table" in the chapter "Configuring Resource Management."

Parameter pd is not applicable to a virtual path.

Note When configuring PVC connections, configure the lowest VPI and VCI numbers first.

Example

The following example shows how to configure the internal cross-connect PVC on Switch B between interface 3/0/1, VPI = 0, VCI = 50 and interface 3/0/2, VPI = 2, VCI = 100 (see Figure 6-1):

Switch-B(config)# interface atm 3/0/1

Switch-B(config-if)# atm pvc 0 50 interface atm 3/0/2 2 100

The following example shows how to configure the internal cross connect PVC on Switch C between interface 4/1/0, VPI = 2, VCI = 100 and interface 0/0/1, VPI 50, VCI = 255:

Switch-C(config)# interface atm 4/1/0

Switch-C(config-if)# atm pvc 2 100 interface atm 0/0/1 50 255

Each subsequent VC cross connection and link must be configured until the VC is terminated to create the entire VCC.

Example

The following example shows how to configure the CPU leg of any terminating PVC:

Switch(config)# interface atm 2/0/0

Switch(config-if)# atm pvc 0 ?

  <32-16383>  vci
  any-vci     Choose any available vci
Switch(config-if)# atm pvc 0 any-vci

Switch(config-if)#

When configuring the CPU leg of a PVC that is not a tunnel, the VPI should be configured as 0. The preferred method of VCI configuration is to select the any-vci parameter, unless a specific VCI is needed as a parameter in another command, such as map-list.

Note If configuring a specific VCI value for the CPU leg, select a VCI value higher than 300. This step prevents a conflict with an automatically assigned VCI for well-known channels if the switch reboots.

Display Virtual Channel Connections

To show the VC configuration, use the following EXEC mode commands:

Task Command

Show the ATM interface configuration.

show atm interface [atm card/subcard/port]

Show the PVC interface configuration.

show atm vc [interface atm card/subcard/port vpi vci]

Task	Command
Show the ATM interface configuration.	show atm interface [atm card/subcard/port]
Show the PVC interface configuration.	show atm vc [interface atm card/subcard/port vpi vci]

Note The following examples differ depending on the Feature Card installed on the ASP.

Examples

The following example displays the Switch B PVC configuration on interface 3/0/1:

Switch-B# show atm interface

 
<Information Deleted>
Interface:      ATM3/0/1        Port-type:    oc3suni
IF Status:      UP              Admin Status: up
Auto-config:    enabled         AutoCfgState: completed
IF-Side:        Network         IF-type:      NNI
Uni-type:       not applicable  Uni-version:  not applicable
Max-VPI-bits:   8               Max-VCI-bits: 14
Max-VP:         255             Max-VC:       16383
Svc Upc Intent: pass            Signalling:   Enabled
ATM Address for Soft VC: 47.0091.8100.0000.0001.0000.0001.4000.0c81.8010.00
Configured virtual links:
  PVCLs SoftVCLs   SVCLs   PVPLs SoftVPLs   SVPLs  Total-Cfgd  Installed-Conns
      5        0       0       0        0       0           5                5
Logical ports(VP-tunnels):     0
Input cells:    527452          Output cells: 527485
5 minute input rate:             0 bits/sec,       0 cells/sec
5 minute output rate:            0 bits/sec,       0 cells/sec
Input AAL5 pkts: 344372, Output AAL5 pkts: 344384, AAL5 crc errors: 0
<Information Deleted>
Switch-B#

The following example displays the Switch B PVC configuration on interface 3/0/1 with Feature Card FC-PFQ installed:

Switch-B# show atm vc interface atm 3/0/1

Interface    VPI   VCI   Type    X-Interface  X-VPI X-VCI  Encap Status
ATM3/0/1     0     5      PVC     ATM2/0/0     0     57    QSAAL  UP
ATM3/0/1     0     16     PVC     ATM2/0/0     0     37    ILMI   UP
ATM3/0/1     0     18     PVC     ATM2/0/0     0     73    PNNI   UP
ATM3/0/1     0     50     PVC     ATM3/0/2     2     100          UP
ATM3/0/1     1     50     PVC     ATM2/0/0     0     80    SNAP   UP
Switch-B#

The following example displays the Switch B VC configuration on interface 3/0/1, VPI = 0, VCI = 50 with Feature Card FC-PFQ installed:

Switch-B# show atm vc interface atm 3/0/1 0 50

Interface: ATM3/0/1, Type: oc3suni
VPI = 0  VCI = 50
Status: UP
Time-since-last-status-change: 4d02h
Connection-type: PVC
Cast-type: point-to-point
Packet-discard-option: disabled
Usage-Parameter-Control (UPC): pass
Wrr weight: 32
Number of OAM-configured connections: 0
OAM-configuration: disabled
OAM-states:  Not-applicable
Cross-connect-interface: ATM3/0/2, Type: oc3suni
Cross-connect-VPI = 2
Cross-connect-VCI = 100
Cross-connect-UPC: pass
Cross-connect OAM-configuration: disabled
Cross-connect OAM-state:  Not-applicable
Threshold Group: 5, Cells queued: 0
Rx cells: 0, Tx cells: 0
Tx Clp0:0,  Tx Clp1: 0
Rx Clp0:0,  Rx Clp1: 0
Rx Upc Violations:0, Rx cell drops:0
Rx Clp0 q full drops:0, Rx Clp1 qthresh drops:0
Rx connection-traffic-table-index: 1
Rx service-category: UBR (Unspecified Bit Rate)
Rx pcr-clp01: 7113539
Rx scr-clp01: none
Rx mcr-clp01: none
Rx tolerance: 1024 (from default for interface)
Tx connection-traffic-table-index: 1
Tx service-category: UBR (Unspecified Bit Rate)
Tx pcr-clp01: 7113539
Tx scr-clp01: none
Tx mcr-clp01: none
Tx tolerance: none
 
Switch-B#

Configure Terminating PVC Connections

This section describes configuring terminating PVC connections. Terminating connections provide the connection to the LightStream 1010 switch CPU for LAN Emulation (LANE), IP over ATM, and control channels for Interim Local Management Interface (ILMI), signaling, and Private Network-to-Network Interface (PNNI) plus network management.

Figure 6-2 shows an example of transit and terminating connections.

Figure 6-2: Virtual Connection Types Example

Point-to-point and point-to-multipoint are two type of terminating connections. Both terminating connections are configured using the same commands as transit connections (discussed in the previous sections). However, all switch terminating connections use interface 2/0/0 to connect to the switch CPU.

The following sections describe point-to-point and point-to-multipoint configuration of PVC and PVP connections.

Terminate PVC Connection Command Description

To configure both point-to-point and point-to-multipoint terminating PVC connections, use the following EXEC commands. Use the no form of this command to disable connections

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal.

configure ¹
[terminal]

Select the interface to be configured.

interface atm card-A/subcard-A/port-A [.vpt #]

Configure the PVC between ATM switch connections.

atm pvc vpi-A [vci-A | any-vci²] [cast-type p2mp-leaf p2mp-root p2p] [upc upc-A] [pd pd] [rx-cttr index] [tx-cttr index] interface atm card-B/subcard-B/port-B[.vpt #] vpi-B [vci-A | any-vci²] [upc upc-B] [cast-type p2mp-leaf | p2mp-root | p2p]

¹This command is documented in the LightStream 1010 ATM Switch Command Reference (11.2) publication.
²The any-vci feature is only available for interface ATM 2/0/0.

.

Task	Command
At the privileged EXEC prompt, enter configuration mode from the terminal.	configure ¹ [terminal]
Select the interface to be configured.	interface atm card-A/subcard-A/port-A [.vpt #]
Configure the PVC between ATM switch connections.	atm pvc vpi-A [vci-A \| any-vci²] [cast-type p2mp-leaf p2mp-root p2p] [upc upc-A] [pd pd] [rx-cttr index] [tx-cttr index] interface atm card-B/subcard-B/port-B[.vpt #] vpi-B [vci-A \| any-vci²] [upc upc-B] [cast-type p2mp-leaf \| p2mp-root \| p2p]

When configuring point-to-multipoint PVC connections using the atm pvc command, the root point is port A and the leaf points are port B.

Examples

The following example shows how to configure the CPU leg of any terminating PVC:

Switch(config)# interface atm 2/0/0

Switch(config-if)# atm pvc 0 ?

  <32-16383>  vci
  any-vci     Choose any available vci
Switch(config-if)# atm pvc 0 any-vci

Switch(config-if)#

Note If configuring a specific VCI value for the CPU leg, select a VCI value higher than 300 to prevent a conflict with an automatically assigned VCI for well-known channels if the switch reboots.

The following example shows how to configure the internal cross connect PVC between interface 3/0/1, VPI = 1, VCI =50 and the terminating connection at the CPU interface 2/0/0, VPI = 0, and VCI unspecified:

Switch-B(config)# interface atm 3/0/1

Switch-B(config-if)# atm pvc 1 50 interface atm 2/0/0 0 any-vci encap aal5snap

The following example shows how to configure a point-to-multipoint connection from the root point PVC on switch interface 0/0/0, VPI = 50, VCI =100 and the terminating connection at the leaf point switch CPU interface 2/0/0, VPI = 0, VCI = 300:

Switch(config)# interface atm 0/0/0

Switch(config-if)# atm pvc 50 100 interface atm 2/0/0 0 300 enacap aal5snap

Display the Terminating PVC Connections

To show the terminating PVC configuration, use the following EXEC mode commands:

Task Command

Show the ATM interface configuration.

show atm vc card/subcard/port

Show the PVC interface configuration.

show atm vc interface atm card/subcard/port vpi vci

Task	Command
Show the ATM interface configuration.	show atm vc card/subcard/port
Show the PVC interface configuration.	show atm vc interface atm card/subcard/port vpi vci

See the section "Display Virtual Channel Connections" for examples of the show atm vc commands.

Configure Permanent Virtual Path Connections

This section describes configuring a PVP connection. Figure 6-3 shows an example of a LightStream 1010 switch with PVPs configured through the switch.

Figure 6-3: Virtual Path Connection Example

To configure a PVP connection, use the following EXEC commands. Use the no form of this command to disable:

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal.

configure¹
[terminal]

Select the physical interface to be configured.

interface atm card/subcard/port

Configure interface PVP.

atm pvp vpi [cast-type type] [upc upc] [rx-cttr index] [shaped] [tx-cttr index] interface card/subcard/port

¹This command is documented in the LightStream 1010 ATM Switch Command Reference (11.2) publication.

Task	Command
At the privileged EXEC prompt, enter configuration mode from the terminal.	configure¹ [terminal]
Select the physical interface to be configured.	interface atm card/subcard/port
Configure interface PVP.	atm pvp vpi [cast-type type] [upc upc] [rx-cttr index] [shaped] [tx-cttr index] interface card/subcard/port

Note When configuring PVP connections, configure the lowest VPI numbers first.

Example

The following example shows how to configure the internal cross-connect PVP within Switch B between interfaces 3/0/1, VPI = 1 and interface 3/0/2, VPI = 2:

Switch-B# config t

Enter configuration commands, one per line.  End with CNTL/Z.
Switch-B(config)# interface atm 3/0/1

Switch-B(config-if)# atm pvp 1 interface atm 3/0/2 2

Switch-B(config-if)#

The following example shows how to configure the internal cross-connect PVP within Switch C between interfaces 4/1/0, VPI = 2 and interface 0/0/1, VPI = 50:

Switch-C(config)# interface atm 4/1/0

Switch-C(config-if)# atm pvp 2 interface atm 0/0/1 50

Switch-C(config-if)#

Each subsequent PVP cross connection and link must be configured until the VP is terminated to create the entire PVP.

Display the Virtual Path Connection

To show the ATM interface configuration, use the following command:

Task Command

Show the ATM VP configuration.

show atm vp [interface atm card/subcard/port vpi]

Task	Command
Show the ATM VP configuration.	show atm vp [interface atm card/subcard/port vpi]

Note The following examples differ depending on the Feature Card installed on the ASP.

Example

The following example displays the PVP configuration of Switch B:

Switch-B# show atm vp

Interface    VPI    Type  X-Interface     X-VPI     Status
ATM3/0/1         1           PVP     ATM3/0/2               2                 UP
Switch-B#

The following example displays the PVP configuration of Switch B with Feature Card FC-PFQ installed:

Switch-B# show atm vp interface atm 3/1/0 1

 
Interface: ATM3/1/0, Type: oc3suni
VPI = 1
Status: UP
Time-since-last-status-change: 4d22h
Connection-type: PVP
Cast-type: point-to-point
Usage-Parameter-Control (UPC): pass
Wrr weight: 32
Number of OAM-configured connections: 0
OAM-configuration: disabled
OAM-states:  Not-applicable
Cross-connect-interface: ATM3/0/2, Type: oc3suni
Cross-connect-VPI = 2
Cross-connect-UPC: pass
Cross-connect OAM-configuration: disabled
Cross-connect OAM-state:  Not-applicable
Threshold Group: 5, Cells queued: 0
Rx cells: 0, Tx cells: 0
Tx Clp0:0,  Tx Clp1: 0
Rx Clp0:0,  Rx Clp1: 0
Rx Upc Violations:0, Rx cell drops:0
Rx Clp0 q full drops:0, Rx Clp1 qthresh drops:0
Rx connection-traffic-table-index: 1
Rx service-category: UBR (Unspecified Bit Rate)
Rx pcr-clp01: 7113539
Rx scr-clp01: none
Rx mcr-clp01: none
Rx tolerance: 1024 (from default for interface)
Tx connection-traffic-table-index: 1
Tx service-category: UBR (Unspecified Bit Rate)
Tx pcr-clp01: 7113539
Tx scr-clp01: none
Tx mcr-clp01: none
Tx tolerance: none
 
Switch-B#

Configure Point-to-Multipoint PVC Connection

This section describes configuring point-to-multipoint PVC connections.

In Figure 6-4, cells entering the switch at the root point (on the left side at interface 0/0/0, VPI = 50, VCI = 100), are duplicated and switched to the leaf points (output interfaces) on the right side of the example.

Figure 6-4: Point-to-Multipoint PVC Example

Note If desired, one of the leaf points can terminate in the LightStream 1010 at the CPU interface ATM 2/0/0.

Point-to-Multipoint PVC Connection Command Description

This section describes the commands needed to configure the example in Figure 6-4.

To configure point-to-multipoint PVC connections, use the following EXEC commands. Use the no form of this command to disable connection:

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal.

configure ¹
[terminal]

Select the interface to be configured.

interface atm card/subcard/port [.vpt #]

Configure the PVC between ATM switch connections.

atm pvc vpi-A vci-A [cast-type p2mp-leaf p2mp-root p2p] [upc upc-A] [pd pd] [rx-cttr index] [tx-cttr index] interface atm card-B/subcard-B/port-B[.vpt #] vpi-B vci-B [cast-type type] [upc upc-B]

¹This command is documented in the LightStream 1010 ATM Switch Command Reference (11.2) publication.

Task	Command
At the privileged EXEC prompt, enter configuration mode from the terminal.	configure ¹ [terminal]
Select the interface to be configured.	interface atm card/subcard/port [.vpt #]
Configure the PVC between ATM switch connections.	atm pvc vpi-A vci-A [cast-type p2mp-leaf p2mp-root p2p] [upc upc-A] [pd pd] [rx-cttr index] [tx-cttr index] interface atm card-B/subcard-B/port-B[.vpt #] vpi-B vci-B [cast-type type] [upc upc-B]

To configure the point-to-multipoint PVC connections using the atm pvc command, the root point is port A and the leaf points are port B.

Examples

The following example shows how to configure the root point PVC on switch interface 0/0/0, VPI = 50, VCI =100 to the leaf point interface 0/1/0, VPI = 60, VCI = 200 (see Figure 6-4):

Switch# config t

Enter configuration commands, one per line. End with CNTL/Z.

Switch(config)# interface atm 0/0/0

Switch(config-if)# atm pvc 50 100 cast-type p2mp-root interface atm 0/1/0 60 200 cast-type p2mp-leaf

The following example shows how to configure the same root point PVC to the leaf point interface 0/1/1, VPI = 70, VCI = 210:

Switch(config-if)# atm pvc 50 100 cast-type p2mp-root interface atm 0/1/1 70 210 cast-type p2mp-leaf

The following example shows how to configure the same root point PVC to the leaf point interface 0/1/2, VPI = 80, VCI = 220:

Switch(config-if)# atm pvc 50 100 cast-type p2mp-root interface atm 0/1/2 80 220 cast-type p2mp-leaf

Display Point-to-Multipoint PVC Configuration

To show the point-to-multipoint PVC configuration, use the following EXEC mode commands:

Task Command

Show the ATM interface configuration.

show atm vc card/subcard/port

Show the PVC interface configuration.

show atm vc interface atm card/subcard/port vpi vci

Task	Command
Show the ATM interface configuration.	show atm vc card/subcard/port
Show the PVC interface configuration.	show atm vc interface atm card/subcard/port vpi vci

Note The following examples differ depending on the Feature Card installed on the ASP.

Examples

The following example displays the point-to-multipoint PVC configuration on interface 0/0/1 with Feature Card FC-PFQ installed:

Switch#show atm vc interface atm 0/0/0

Interface    VPI   VCI   Type    X-Interface  X-VPI X-VCI  Encap Status
ATM0/0/0     0     5      PVC     ATM2/0/0     0     56    QSAAL  UP
ATM0/0/0     0     16     PVC     ATM2/0/0     0     36    ILMI   UP
ATM0/0/0     50    100    PVC     ATM0/1/0         60    200          UP
                                  ATM0/1/1         70    210          UP
                                  ATM0/1/2         80    220          UP
Switch#

The following example displays the VC configuration on interface 0/0/0, VPI = 50, VCI = 100 with Feature Card FC-PFQ installed:

Switch# show atm vc interface atm 0/0/0 50 100

 
Interface: ATM0/0/0, Type: oc3suni
VPI = 50  VCI = 100
Status: UP
Time-since-last-status-change: 00:07:06
Connection-type: PVC
Cast-type: point-to-multipoint-root
Packet-discard-option: disabled
Usage-Parameter-Control (UPC): pass
Wrr weight: 32
Number of OAM-configured connections: 0
OAM-configuration: disabled
OAM-states:  Not-applicable
Cross-connect-interface: ATM0/1/0, Type: oc3suni
Cross-connect-VPI = 60
Cross-connect-VCI = 200
Cross-connect-UPC: pass
Cross-connect OAM-configuration: disabled
Cross-connect OAM-state:  Not-applicable
Cross-connect-interface: ATM0/1/1
Cross-connect-VPI = 70
Cross-connect-VCI = 210
Cross-connect-interface: ATM0/1/2
Cross-connect-VPI = 80
Cross-connect-VCI = 220
Threshold Group: 5, Cells queued: 0
Rx cells: 0, Tx cells: 0
Tx Clp0:0,  Tx Clp1: 0
Rx Clp0:0,  Rx Clp1: 0
Rx Upc Violations:0, Rx cell drops:0
Rx Clp0 q full drops:0, Rx Clp1 qthresh drops:0
Rx connection-traffic-table-index: 1
Rx service-category: UBR (Unspecified Bit Rate)
Rx pcr-clp01: 7113539
Rx scr-clp01: none
Rx mcr-clp01: none
Rx tolerance: 1024 (from default for interface)
Tx connection-traffic-table-index: 1
Tx service-category: UBR (Unspecified Bit Rate)
Tx pcr-clp01: 7113539
Tx scr-clp01: none
Tx mcr-clp01: none
Tx tolerance: none
 
Switch#

Configure Point-to-Multipoint PVP Channels

This section describes configuring point-to-multipoint PVP connections. Figure 6-5 provides an example of point-to-multipoint PVP connections.

Figure 6-5: Point-to-Multipoint Permanent Virtual Path Example

In Figure 6-5, cells entering the switch at the root point (the left side at interface 0/0/0), VPI = 50, are duplicated and switched to the leaf points (output interfaces), on the right side of the example.

The following section describes the commands needed to configure this example.

Point-to-Multipoint PVP Command Description

To configure point-to-multipoint PVP connections, use the following EXEC commands. Use the no form of this command to disable:

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal.

configure ¹
[terminal]

Select the interface to be configured.

interface atm card-A/subcard-A/port-A

Configure interface PVP.

atm pvp vpi-A [cast-type p2mp-leaf p2mp-root p2p] [upc upc-A] [rx-cttr index] [shaped] [tx-cttr index] interface card-B/subcard-B/port-B vpi-B [cast-type type]

¹This command is documented in the LightStream 1010 ATM Switch Command Reference (11.2) publication.

Task	Command
At the privileged EXEC prompt, enter configuration mode from the terminal.	configure ¹ [terminal]
Select the interface to be configured.	interface atm card-A/subcard-A/port-A
Configure interface PVP.	atm pvp vpi-A [cast-type p2mp-leaf p2mp-root p2p] [upc upc-A] [rx-cttr index] [shaped] [tx-cttr index] interface card-B/subcard-B/port-B vpi-B [cast-type type]

To configure the point-to-multipoint PVP connections using the atm pvp command the, root point is port A and the leaf points are port B.

Examples

The following example shows how to configure the root point PVP on switch interface 0/0/0, VPI = 50 to the leaf point interface 0/1/0, VPI = 60 (see Figure 6-5):

Switch# config t

Enter configuration commands, one per line. End with CNTL/Z.

Switch(config)# interface atm 0/0/0

Switch(config-if)# atm pvp 50 cast-type p2mp-root interface atm 0/1/0 60 cast-type p2mp-leaf

The following example shows how to configure the same root point PVP to the leaf point interface 0/1/0, VPI = 70:

Switch(config-if)# atm pvp 50 cast-type p2mp-root interface atm 0/1/1 70 cast-type p2mp-leaf

The following example shows how to configure the same root point PVP to the leaf point interface 0/1/2, VPI = 80:

Switch(config-if)# atm pvp 50 cast-type p2mp-root interface atm 0/1/2 80 cast-type p2mp-leaf

Display Point-To-Multipoint PVP Configuration

To show the ATM interface configuration use the following command:

Task Command

Show the ATM VP configuration.

show atm vp [interface atm card/subcard/port vpi]

Task	Command
Show the ATM VP configuration.	show atm vp [interface atm card/subcard/port vpi]

Note The following examples differ depending on the Feature Card installed on the ASP.

Example

The following example displays the PVP configuration of the point-to-multipoint PVP connections on ATM interface 0/0/0:

Switch#show atm vp interface atm 0/0/0

Interface    VPI    Type  X-Interface     X-VPI     Status
ATM0/0/0     50      PVP     ATM0/1/0     60        UP
                             ATM0/1/1     70        UP
                             ATM0/1/2     80        UP
Switch#

The following example displays the PVP configuration of the point-to-multipoint PVP connections on ATM interface 0/0/0 VPI = 50 with Feature Card FC-PFQ installed:

Switch# show atm vp interface atm 0/0/0 50

 
Interface: ATM0/0/0, Type: oc3suni
VPI = 50
Status: UP
Time-since-last-status-change: 00:00:37
Connection-type: PVP
Cast-type: point-to-multipoint-root
Usage-Parameter-Control (UPC): pass
Wrr weight: 32
Number of OAM-configured connections: 0
OAM-configuration: disabled
OAM-states:  Not-applicable
Cross-connect-interface: ATM0/1/0, Type: oc3suni
Cross-connect-VPI = 60
Cross-connect-UPC: pass
Cross-connect OAM-configuration: disabled
Cross-connect OAM-state:  Not-applicable
Cross-connect-interface: ATM0/1/1
Cross-connect-VPI = 70
Cross-connect-interface: ATM0/1/2
Cross-connect-VPI = 80
Threshold Group: 5, Cells queued: 0
Rx cells: 0, Tx cells: 0
Tx Clp0:0,  Tx Clp1: 0
Rx Clp0:0,  Rx Clp1: 0
Rx Upc Violations:0, Rx cell drops:0
Rx Clp0 q full drops:0, Rx Clp1 qthresh drops:0
Rx connection-traffic-table-index: 1
Rx service-category: UBR (Unspecified Bit Rate)
Rx pcr-clp01: 7113539
Rx scr-clp01: none
Rx mcr-clp01: none
Rx tolerance: 1024 (from default for interface)
Tx connection-traffic-table-index: 1
Tx service-category: UBR (Unspecified Bit Rate)
Tx pcr-clp01: 7113539
Tx scr-clp01: none
Tx mcr-clp01: none
Tx tolerance: none
 
Switch#

Configure Soft PVC Connections

This section describes configuring soft PVC connections, which provide the following features:

Connection to another host or switch that does not support signaling

Configuration of PVCs without the manual configuration steps described in the section "Configure Permanent Virtual Channel Connections"
Configuration of PVCs with the reroute or retry capabilities when a failure occurs in the network

Figure 6-6 is an illustration of the soft PVC connections used in the following examples:

Figure 6-6: Soft Permanent Virtual Channel Connection Example

Guidelines for Creating Soft PVCs

Perform the following steps when you configure soft PVCs:

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 want to designate as the destination (or passive) side of the soft PVC.

This decision is arbitrary---it makes no difference which port you define as the destination end of the circuit.

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

You must configure the destination end of the soft PVC first, to define an ATM Forum-compliant Circuit Emulation Service-Interworking Function (CES-IWF) ATM address for that port.

You must retrieve this address (see Step 4), and the VPI/VCI values for the circuit (see Step 5), and use 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 using the show ces address command. This command typically produces output in the following form:

Switch# 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

Switch#

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

Switch#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

Switch#

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

You must configure the source end of the soft PVC last because this 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 in Step 3), this CES-IWF ATM address is not defined for the destination port, and the VPI/VCI values are not available, as required in Step 6 for use in completing the soft PVC.

Soft Permanent Virtual Channel Command Description

To configure a soft PVC connection, use the following EXEC commands. Use the no form of this command to disable:

Task Command

Determine destination ATM address.

show atm addresses

At the privileged EXEC prompt, enter configuration mode from the terminal.

configure ¹
[terminal]

Select the interface to be configured.

interface atm card/subcard/port [.vpt #]

Configure soft PVC connection.

atm soft-vc src-vpi src-vci dest-address dest_address dest-vpi dest-vci [pd pd] [rx-cttr index] [slow-retry-interval seconds] [tx-cttr index] [upc drop pass tag]

¹This command is documented in the LightStream 1010 ATM Switch Command Reference (11.2) publication.

Task	Command
Determine destination ATM address.	show atm addresses
At the privileged EXEC prompt, enter configuration mode from the terminal.	configure ¹ [terminal]
Select the interface to be configured.	interface atm card/subcard/port [.vpt #]
Configure soft PVC connection.	atm soft-vc src-vpi src-vci dest-address dest_address dest-vpi dest-vci [pd pd] [rx-cttr index] [slow-retry-interval seconds] [tx-cttr index] [upc drop pass tag]

Examples

The following example shows how to allow User A to determine the destination ATM address of the interface connected to User D:

Switch-C# show atm addresses


Switch Address(es):
  47.00918100000000603E5ADB01.00603E5ADB01.00 active
Soft VC Address(es):
    47.0091.8100.1111.1111.1111.1111.1111.1111.1111.00 ATM4/0/0
ILMI Switch Prefix(es):
  47.0091.8100.0000.0060.3e5a.db01
ILMI Configured Interface Prefix(es):
LECS Address(es):
Switch-C#

The following example shows how to configure a soft PVC on Switch B between interface 0/0/0, source VPI = 0, source, VCI = 200, and switch C, destination ATM address = 47.0091.8100.00.0000.1111.1111.1111.1111.1111.1111.00, VPI = 0, VCI = 100 (see Figure 6-6):

Switch-B(config)# interface atm 0/0/0

Switch-B(config-if)# atm soft-vc 0 200 dest-address 47.0091.8100.00.0000.1111.1111.1111.1111.1111.1111.00 0 100

Display Soft VC Configuration

To display the soft VC configuration at either end switch use the following EXEC mode commands:

Task Command

Show the ATM interface configuration.

show atm vc card/subcard/port

Show the soft VC interface configuration.

show atm vc [interface atm card/subcard/port vpi vci]

Task	Command
Show the ATM interface configuration.	show atm vc card/subcard/port
Show the soft VC interface configuration.	show atm vc [interface atm card/subcard/port vpi vci]

Note The following examples differ depending on the Feature Card installed on the ASP.

Examples

The following example displays the soft VC configuration of Switch B, on interface 0/0/0 out to the ATM network:

Switch-B# show atm vc interface atm 0/0/0

Interface    VPI   VCI   Type    X-Interface  X-VPI X-VCI  Encap Status
ATM0/0/0     0     5      PVC     ATM2/0/0     0     52    QSAAL  DOWN
ATM0/0/0     0     16     PVC     ATM2/0/0     0     32    ILMI   DOWN
ATM0/0/0         0         200        SoftVC   ATM4/0/0         0         100                   UP
Switch-B#

The following example displays the soft VC configuration of switch C, on interface 4/0/0 out to the ATM network:

Switch-C# show atm vc interface atm 4/0/0

Interface    VPI   VCI   Type    X-Interface  X-VPI X-VCI  Encap Status
ATM4/0/0     0     5      PVC     ATM2/0/0     0     52    QSAAL  DOWN
ATM4/0/0     0     16     PVC     ATM2/0/0     0     32    ILMI   DOWN
ATM4/0/0         0       100    SoftVC   ATM0/0/0         0          200                   UP
Switch-C#

The following example displays the soft VC configuration of Switch B, on interface 0/0/0, VPI = 0, VCI = 200 out to the ATM network with Feature Card FC-PFQ installed:

Switch-B# show atm vc interface atm 0/0/0 0 200

Interface: ATM0/0/0, Type: oc3suni
VPI = 0  VCI = 200
Status: NOT CONNECTED
Time-since-last-status-change: 00:00:45
Connection-type: SoftVC
Cast-type: point-to-point
Soft vc location: Source
Remote ATM address: 47.0091.8100.00.0000.1111.1111.1111.1111.1111.1111.00
Remote VPI: 0
Remote VCI: 100
Soft vc call state: Inactive
Number of soft vc re-try attempts: 4
Slow-retry-interval: 60 seconds
Next retry in: 29 seconds
Aggregate admin weight: 0
Packet-discard-option: disabled
Usage-Parameter-Control (UPC): pass
Wrr weight: 32
Number of OAM-configured connections: 0
OAM-configuration: disabled
OAM-states:  Not-applicable
Threshold Group: 5, Cells queued: 0
Rx cells: 0, Tx cells: 0
Tx Clp0:0,  Tx Clp1: 0
Rx Clp0:0,  Rx Clp1: 0
Rx Upc Violations:0, Rx cell drops:0
Rx Clp0 q full drops:0, Rx Clp1 qthresh drops:0
Rx connection-traffic-table-index: 1
Rx service-category: UBR (Unspecified Bit Rate)
Rx pcr-clp01: 7113539
Rx scr-clp01: none
Rx mcr-clp01: none
Rx tolerance: 1024 (from default for interface)
Tx connection-traffic-table-index: 1
Tx service-category: UBR (Unspecified Bit Rate)
Tx pcr-clp01: 7113539
Tx scr-clp01: none
Tx mcr-clp01: none
Tx tolerance: none
Switch-B#

Configure Soft PVP Connections

This section describes configuring soft PVP connections, which provide the following features:

Connection to another host or switch that does not support signaling

Configuration of PVPs without the manual configuration steps described in the section "Configure Permanent Virtual Channel Connections"
Configuration of PVPs with the reroute or retry capabilities when a failure occurs within the network

Figure 6-7 is an illustration of the soft PVP connections used in the examples in this section.

Figure 6-7: Soft Permanent Virtual Path Connection Example

Soft Permanent Virtual Path Command Description

To configure a soft PVP connection, use the following EXEC commands. Use the no form of this command to disable:

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal.

configure ¹
[terminal]

Select the interface to be configured.

interface atm card/subcard/port

Configure soft PVP connection.

atm soft-vp src-vpi dest-address dest-address dest-vpi [pd pd] [rx-cttr index] [slow-retry-interval seconds] [tx-cttr index] [upc drop pass tag]

¹This command is documented in the LightStream 1010 ATM Switch Command Reference (11.2) publication.

Task	Command
At the privileged EXEC prompt, enter configuration mode from the terminal.	configure ¹ [terminal]
Select the interface to be configured.	interface atm card/subcard/port
Configure soft PVP connection.	atm soft-vp src-vpi dest-address dest-address dest-vpi [pd pd] [rx-cttr index] [slow-retry-interval seconds] [tx-cttr index] [upc drop pass tag]

Example

The following example shows how to configure a soft PVP on Switch B between interface 0/0/0, source VPI = 75, and Switch C, destination ATM address = 47.0091.8100.00.0000.1111.1111.1111.1111.1111.1111.00, VPI = 50 (Figure 6-7):

Switch-B(config)# interface atm 0/0/0

Switch-B(config-if)# atm soft-vp dest-address 75 47.0091.8100.00.0000.1111.1111.1111.1111.1111.1111.00 50

Display Virtual Path Connection

To show the ATM virtual path configuration use the following command:

Task Command

Show the ATM VP configuration.

show atm vp [interface atm card/subcard/port vpi]

Task	Command
Show the ATM VP configuration.	show atm vp [interface atm card/subcard/port vpi]

Note The following examples differ depending on the Feature Card installed on the ASP.

Examples

The following example displays the soft VP configuration at Switch B, on interface 0/0/0 out to the ATM network:

Switch-B# show atm vp

Interface    VPI    Type  X-Interface     X-VPI     Status
ATM0/0/0         75         SoftVP      ATM4/0/0          50               UP
Switch-B#

The following example displays the soft VP configuration at Switch C, on interface 4/0/0 out to the ATM network:

Switch-C# show atm vp

Interface    VPI    Type  X-Interface     X-VPI     Status
ATM4/0/0         50         SoftVP      ATM0/0/0         75               UP
Switch-C#

The following example displays the soft VP configuration at Switch B, on interface 0/0/0, VPI = 75 out to the ATM network with Feature Card FC-PFQ installed:

Switch-B# show atm vp interface atm 0/0/0 75

 
Interface: ATM0/0/0, Type: oc3suni
VPI = 75
Status: NOT CONNECTED
Time-since-last-status-change: 00:01:10
Connection-type: SoftVP
Cast-type: point-to-point
Soft vp location: Source
Remote ATM address: 47.0091.8100.00.0000.1111.1111.1111.1111.1111.1111.00
Remote VPI: 50
Soft vp call state: Inactive
Number of soft vp re-try attempts: 4
Slow-retry-interval: 60 seconds
Next retry in: 4 seconds
Aggregate admin weight: 0
Usage-Parameter-Control (UPC): pass
Wrr weight: 32
Number of OAM-configured connections: 0
OAM-configuration: disabled
OAM-states:  Not-applicable
Threshold Group: 5, Cells queued: 0
Rx cells: 0, Tx cells: 0
Tx Clp0:0,  Tx Clp1: 0
Rx Clp0:0,  Rx Clp1: 0
Rx Upc Violations:0, Rx cell drops:0
Rx Clp0 q full drops:0, Rx Clp1 qthresh drops:0
Rx connection-traffic-table-index: 1
Rx service-category: UBR (Unspecified Bit Rate)
Rx pcr-clp01: 7113539
Rx scr-clp01: none
Rx mcr-clp01: none
Rx tolerance: 1024 (from default for interface)
Tx connection-traffic-table-index: 1
Tx service-category: UBR (Unspecified Bit Rate)
Tx pcr-clp01: 7113539
Tx scr-clp01: none
Tx mcr-clp01: none
Tx tolerance: none
 
Switch-B#

Configure the Soft PVC Route Optimization Feature

This section describes the soft PVC route optimization feature. Most soft PVCs have a much longer lifetime than SVCs. The route chosen during PVC setup remains the same even though the network topology may change.

Soft PVC connections, with the route optimization percentage threshold set, provide the following features:

When a better route is available, soft PVCs are dynamically rerouted
Route optimization can be triggered manually

Note Soft PVC route optimization should not be configured with constant bit rate (CBR) connections.

Route optimization is directly related to administrative weight which is similar to hop count. For a description of administrative weight, see the section "Configure the Administrative Weight Mode" in the chapter "Configuring ATM Routing and PNNI."

Configuring soft PVC route optimization is described in the following sections:

Enable Soft PVC Route Optimization

Soft PVC route optimization must be enabled and a threshold level configured to determine the point when a better route is identified and the old route is reconfigured.

To enable and configure soft PVC route optimization, use the following EXEC commands. Use the no form of this command to disable:

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal.

configure ¹
[terminal]

Configure soft PVP route optimization.

atm route-optimization {percentage-threshold 5-500}

¹This command is documented in the LightStream 1010 ATM Switch Command Reference (11.2) publication.

Task	Command
At the privileged EXEC prompt, enter configuration mode from the terminal.	configure ¹ [terminal]
Configure soft PVP route optimization.	atm route-optimization {percentage-threshold 5-500}

Example

The following example enables soft PVC route optimization and sets the threshold percentage to 250 percent:

Switch# config t

Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)# atm route-optimization percentage-threshold 250

Switch(config)#

Configure a Soft PVC Interface with Route Optimization

Soft PVC route optimization must be enabled and configured to determine the point at which a better route is found and the old route is reconfigured.

To enable and configure a soft PVC interface with route optimization, use the following interface configuration commands. Use the no form of this command to disable:

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal.

configure ¹
[terminal]

Select the interface to be configured.

interface atm card/subcard/port

Configure the interface soft PVP route optimization.

atm route-optimization soft-connection
{interval minute | time-of-day {anytime
| start time_hh:mm | end time_hh:mm}

¹This command is documented in the LightStream 1010 ATM Switch Command Reference (11.2) publication.

Task	Command
At the privileged EXEC prompt, enter configuration mode from the terminal.	configure ¹ [terminal]
Select the interface to be configured.	interface atm card/subcard/port
Configure the interface soft PVP route optimization.	atm route-optimization soft-connection {interval minute \| time-of-day {anytime \| start time_hh:mm \| end time_hh:mm}

Example

The following example shows how to configure a soft PVC with route a optimization interval configured as every 30 minutes between the hours of 6:00 P.M. and 5:00 A.M.:

Switch(config)# interface atm 0/0/0

Switch(config-if)# atm route-optimization soft-connection interval 30

Switch(config-if)# atm route-optimization soft-connection interval 30 time-of-day 18:00 5:00

Switch(config-if)#

Display Soft PVC Route Optimization Configuration

To display the soft PVC route optimization configuration, use the following EXEC mode command:

Task Command

Show the soft VC interface configuration.

show atm interface atm card/subcard/port

Task	Command
Show the soft VC interface configuration.	show atm interface atm card/subcard/port

Example

The following example displays the soft PVC configuration on interface 0/0/0:

Switch# show atm interface atm 0/0/0

Interface:      ATM0/0/0        Port-type:    oc3suni
IF Status:      UP              Admin Status: up
Auto-config:    enabled         AutoCfgState: completed
IF-Side:        Network         IF-type:      NNI
Uni-type:       not applicable  Uni-version:  not applicable
Max-VPI-bits:   8               Max-VCI-bits: 14
Max-VP:         255             Max-VC:       16383
Svc Upc Intent: pass            Signalling:   Enabled
Soft vc route optimization is enabled
Soft vc route optimization interval = 30 minutes
Soft vc route optimization time-of-day range = (18:0 - 5:0)
ATM Address for Soft VC: 47.0091.8100.0000.0041.0b0a.1081.4000.0c80.0000.00
Configured virtual links:
  PVCLs SoftVCLs   SVCLs   PVPLs SoftVPLs   SVPLs  Total-Cfgd  Installed-Conns
      3        0       0       0        0       0           3                3
Logical ports(VP-tunnels):     0
Input cells:    335654          Output cells: 335588
5 minute input rate:             0 bits/sec,       0 cells/sec
5 minute output rate:            0 bits/sec,       0 cells/sec
Input AAL5 pkts: 219142, Output AAL5 pkts: 219123, AAL5 crc errors: 0
Switch#

Configure Nondefault Well-Known PVCs

Normally the default well-known VCs are automatically created with default VCIs. However, for the unusual instances where the LightStream 1010 switch interfaces with nonstandard equipment, you can configure nondefault well-known VCI values on a per-interface basis.

Table 6-2 lists the default well-known VCs and their default configuration.

Channel Type	Virtual Path Identifier	Virtual Channel Identifier
Signaling	0	5
ILMI	0	16
PNNI	0	18

	Caution Do not change the well-known channels to use a VC where the remote end is sending AAL5 messages not intended for the well-known VC. For example, do not swap VC values between two types of well-known VCs.

Table 6-2: Well-Known Virtual Channels

Channel Type Virtual Path Identifier Virtual Channel Identifier

Signaling

0

5

ILMI

0

16

PNNI

0

18

Caution Do not change the well-known channels to use a VC where the remote end is sending AAL5 messages not intended for the well-known VC. For example, do not swap VC values between two types of well-known VCs.

Following is an overview of the steps needed to configure nondefault well-known VCs:

Step 1 Enable manual well-known VC configuration.

Step 2 Delete any existing automatically created well-known VCs.

Step 3 Configure the individual encapsulation type as follows:

Signaling (QSAAL)
ILMI
PNNI

Step 4 Copy running-configuration file to startup-configuration file.

To configure the nondefault VCs for signaling, ILMI, and PNNI, use the following EXEC commands. Use the no form of these command to disable

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal.

configure ¹
[terminal]

Select the interface to be configured.

interface atm card/subcard/port

Enter manual-well-known-vc mode.

atm manual-well-known-vc {keep | delete}

Configure the nondefault PVC for each signaling and ILMI channel.

atm pvc vpi vci [upc upc] [pd pd] [rx-cttr index] [tx-cttr index] interface atm 2/0/0 any-vci [encap {ilmi | pnni | qsaal}]

Copy the running configuration file to the startup configuration file.

copy running-config startup-config

¹This command is documented in the LightStream 1010 ATM Switch Command Reference (11.2) publication.

.

Task	Command
At the privileged EXEC prompt, enter configuration mode from the terminal.	configure ¹ [terminal]
Select the interface to be configured.	interface atm card/subcard/port
Enter manual-well-known-vc mode.	atm manual-well-known-vc {keep \| delete}
Configure the nondefault PVC for each signaling and ILMI channel.	atm pvc vpi vci [upc upc] [pd pd] [rx-cttr index] [tx-cttr index] interface atm 2/0/0 any-vci [encap {ilmi \| pnni \| qsaal}]
Copy the running configuration file to the startup configuration file.	copy running-config startup-config

Note An error condition occurs if either the signaling or ILMI well-known VCs remain unconfigured when an interface is enabled.

Example

The following example shows the nondefault VC configuration steps:

Step 1 Use the show atm vc interface atm 0/0/0 to display the configuration of the exiting default well-known VCs for ATM interface 0/0/0.

Step 2 Change to interface configuration mode for ATM interface 0/0/0.

Step 3 Enter manual well-known-vc mode and delete the existing default well-known VCs using the atm manual-well-known-vc delete command.

Step 4 Confirm deletion by entering y.

Step 5 Configure the nondefault VC for signaling from 5 (the default) to 35 using the atm pvc 1 35 interface atm 2/0/0 0 any-vci encap qsaal command.

Step 6 Configure the ILMI VC, then configure the PNNI VC if needed using the same procedure.

Step 7 Save the new running configuration to the startup configuration using the copy running-config startup-config command.

An example of this procedure follows:

Switch# show atm vc interface atm 0/0/0

Interface    VPI   VCI   Type    X-Interface  X-VPI X-VCI  Encap Status
ATM0/0/0         0     5      PVC     ATM2/0/0     0     49    QSAAL  UP
ATM0/0/0          0     16     PVC     ATM2/0/0     0     33    ILMI   UP
ATM0/0/0          0     18     PVC     ATM2/0/0     0     65    PNNI   UP
Switch#
Switch# config t

Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)# interface atm 0/0/0

Switch(config-if)# atm manual-well-known-vc delete

Okay to delete well-known VCs for this interface? [no]: y

Switch(config-if)# exit

Switch(config)# interface atm 0/0/0

Switch(config-if)# atm pvc 1 35 interface atm 2/0/0 0 any-vci encap qsaal

Switch(config-if)# ^Z

Switch#
%SYS-5-CONFIG_I: Configured from console by console
Switch# show atm vc interface atm 0/0/0

Interface    VPI   VCI   Type    X-Interface  X-VPI X-VCI  Encap Status
ATM0/0/0     1       35     PVC     ATM2/0/0     0     150   QSAAL  UP
Switch# copy running-config startup-config

Building configuration...
[OK]
Switch#

Configure Interface and Connection Snooping

Snooping allows the cells from all connections, in either receive or transmit direction, on a selected physical port to be transparently mirrored to a snoop test port where an external ATM analyzer can be attached. Unlike shared medium LANs, an ATM system requires a separate port to allow nonintrusive traffic monitoring on a line.

Note Only cells that belong to existing connections are sent to the snoop test port. Any received cells that do not belong to existing connections are not copied. In addition, the STS-3c (or other) overhead bytes transmitted at the test port are not copies of the overhead bytes at the monitored port.

Snooping the Receive Direction

Figure 6-8 shows snooping the receive direction of a port. Snoop test port X receives copies of cells that enter the switch at port A and belong to existing connections, regardless of the connection destinations that the cells mirrored before the cell output queues. Discarded cells do not reach the test port. All cells transmitted at test port X retains the cell headers which were present at the original receive port A.

Figure 6-8: Snooping in the Receive Direction

Snooping the Transmit Direction

Figure 6-9 shows snooping the transmit direction of a port. Snoop test port X transparently receives copies of all cells that belong to connections destined for port A, regardless of the source port. The test port cells are duplicated during the output stage of the switching process after the cell output queues. Cell discards, cell buffering, and cell priority scheduling affect both copies of the cells in the same way. The cell headers transmitted from test port X matches the cell headers transmitted from the monitored port A.

Figure 6-9: Snooping in the Transmit Direction

Snoop Test Port is Highest Port

Only the highest port on the last module of a LightStream 1010 ATM switch can be configured as a snoop test port. The highest port can be configured as either the snoop test port or used as a standard port that acts as any other port. Table 6-3 lists the interface number of the allowed snoop test port for the various port adapter module (PAM) types. If you specify an incorrect snoop test port for the currently installed PAM type, an error appears on the console.

The port number of the test port depends on the card type. Table 6-3 defines the snoop test port number for the various interfaces.

Interface	Port Number
oc3	4/1/3
oc12	4/1/0
ds3/e3	Not supported

Table 6-3: ATM Snoop Port Numbers

Interface Port Number

oc3

4/1/3

oc12

4/1/0

ds3/e3

Not supported

Note If you have a Feature Card version FC-PFQ installed on your ASP, interface snooping is implemented in software and has no restriction on the snoop test port. The snoop test port can be any port in the system. Also, multiple interfaces can be snooped simultaneously. You can configure snooping on both transmit and receive directions on two different ports and monitor traffic in both directions simultaneously.

Effect of Snooping on Monitored Port

There is no effect on cell transmission, interface or VC status and statistics, front panel indicators, or any other parameters associated with a port being monitored during snooping. Any port, other than the highest port, that contains a PAM type with a bandwidth less than or equal to the PAM bandwidth for the test port can be monitored by snooping.

Test Port Shutdown for Snoop Mode Configuration

The port being configured as a test port must be shut down before configuration. While the test port is shut down and after snoop mode has been configured, no cells are transmitted from the test port until it is re-enabled using the no shutdown command. A test port can be put into snoop mode even if there are existing connections to it; however, those connections remains "Down" even after the test port is re-enabled using the no shutdown command. This includes any terminating connections for ILMI, PNNI, or signaling channels on the test port.

If you use a show atm interface command while the test port is enabled in snoop mode the screen shows the following:

Interface state appears as "Snooping" instead of "up" or "down".
Other ATM layer information for the test port is still displayed.
Any previously configured connections on the test port remain installed, but are listed as Connection Status = down.
Data for transmitted cells and output rates indicates the snooping cells are being transmitted.
Counts for receive cells should remain unchanged and the input rate should be 0.

Other Configuration Options for Snoop Test Port

Most inapplicable configuration on the test port interface are disregarded while in snoop mode. However, the following configuration options are not valid when specified for the snoop test port and may affect the proper operation of the snoop mode on the test port.

Diagnostic and PIF loopbacks of the snoop test port. These types of loopbacks do not function in snooping mode since the PIF receive side signals are disabled.
Other physical layer loopbacks (line, cell, or payload) function normally when in snooping mode since they loop toward the line and are unaffected by the lack of PIF receive input.
Interface pacing (with the rate for the snoop test port lower than the rate for the monitored port).
Network-derived clock source using the snoop test port.
Clock-source = loop-timed for the snoop test port.

Caution You should ensure that all options are valid and configured correctly while in the snoop mode.

	Caution You should ensure that all options are valid and configured correctly while in the snoop mode.

Configure Interface Snooping

The atm snoop interface atm subcommand enables a port for snoop test only if the port is the highest system port residing on card 4 and subcard 1 (which has been shut down). Cells transmitted from the snoop test port are copies of cells from a single direction of a monitored port.

When in snoop mode, any prior permanent virtual connections to the snoop test port remain in the down state.

To configure interface port snooping, use the following EXEC commands. Use the no form of this command to disable interface port snooping:

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal.

configure¹
[terminal]

Specify an ATM interface and enter interface configuration mode.

interface atm card/subcard/port

Configure the interface to be snooped.

atm snoop interface atm card/subcard/port direction [receive | transmit]

¹These commands are documented in the LightStream 1010 ATM Switch Command Reference (11.2) publication.

Task	Command
At the privileged EXEC prompt, enter configuration mode from the terminal.	configure¹ [terminal]
Specify an ATM interface and enter interface configuration mode.	interface atm card/subcard/port
Configure the interface to be snooped.	atm snoop interface atm card/subcard/port direction [receive \| transmit]

Examples

The following example shows how configure ATM interface 4/1/3 as the highest port in snoop mode to monitor ATM interface 1/1/0, tested in the transmit direction:

Switch# config t

Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)# interface atm 4/1/3

Switch(config-if)# atm snoop interface atm 1/1/0 direction transmit

Switch(config-if)#

Display Interface Snooping

To display the test port information, use the following EXEC mode command:

Task Command

Display the snoop configuration.

show atm snoop

Task	Command
Display the snoop configuration.	show atm snoop

Example

The following example displays the snoop configuration on the OC3 port and the actual register values for the highest interface:

Switch# show atm snoop

Snoop Test Port Name:  ATM4/1/3 (interface status=SNOOPING)
Snoop option:          (configured=enabled) (actual=enabled)
Monitored Port Name:   (configured=ATM3/0/0) (actual=ATM3/0/0)
Snoop direction:       (configured=receive) (actual=receive)
Switch#

Configure Per-Connection Snooping

With per-connection snooping you must specify both the snooped connection endpoint as and the snooping connection endpoint. The switch IOS adds the snooping connection endpoint as a leaf to the snooped connection. The root of the temporary multicast connection depends on the direction being snooped. Snooping in the direction of leaf to root is not allowed for multicast connections. Per-connection snooping features are as follows:

Per-VC snooping
Per-VP snooping

The snooping connection can be configured on any port, when there is no VPI/VCI collision for the snoop connection with the existing connections on the port. Also the port should have enough resources to satisfy the snoop connection resource requirements. In case of failure, due to VPI/VCI collision or resource exhaustion, a warning messages is displayed, and you can reconfigure the connection on a different port.

To snoop both transmit and receive directions of a connection, you need to configure two different snoop connections.

Note The Per-connection snooping is only available if you have Feature Card FC-FPQ installed on your ASP.

Nondisruptive per-connection snooping is achieved by dynamically adding a leaf to an existing connection (either unicast or multicast). This can lead to cell discard if the added leaf cannot process the snooped cells fast enough. For a multicast connection the queue buildup is dictated by the slowest leaf in the connection. The leaf added for snooping inherits the same traffic characteristics as the other connection leg. This ensures that the added leaf does not become the bottleneck and affect the existing connection.

To configure connection snooping, use the following EXEC commands. Use the no form of these commands to disable connection snooping:

Task Command

At the privileged EXEC prompt, enter configuration mode from the terminal.

configure¹
[terminal]

Specify an ATM interface and enter interface configuration mode.

interface atm card/subcard/port

Configure the virtual channel to be snooped.

atm snoop-vc [a_vpi a_vci²] interface atm card/subcard/port x_vpi x_vci³ [direction {receive | transmit}]

Configure the virtual path to be snooped.

atm snoop-vp [a_vpi] interface atm card/subcard/port x_vpi [direction {receive | transmit}]

¹These commands are documented in the LightStream 1010 ATM Switch Command Reference (11.2) publication.
²a denotes the snooping connection.
³x denotes the snooped connection.

Examples

The following example shows how to configure VC 100 200 on ATM interface 3/1/0 to snoop a VC 200 150, on ATM interface 1/0/0:

Switch# config t

Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)# interface atm 3/1/0

Switch(config-if)# atm snoop-vc 100 200 interface atm 1/0/0 200 150 direction receive

Switch(config-if)#

The following example shows how to configure VP 100 on ATM interface 3/1/0 to snoop a VP 200, on ATM interface 1/0/0:

Switch# config t

Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)# interface atm 3/1/0

Switch(config-if)# atm snoop-vp 100 interface atm 1/0/0 200 direction receive

Switch(config-if)#

Display Per-connection Snooping

To display the test per-connection information, use the following EXEC mode commands:

Task Command

Display the snoop VC information.

show atm snoop-vc [interface atm card/subcard/port [x_vpi x_vci]]

Display the snoop VP information.

show atm snoop-vp [interface atm card/subcard/port [x_vpi]]

Examples

The following example shows all VC snoop connections on the switch:

Switch> show atm snoop-vc

      Snooping                            Snooped                   
Interface    VPI   VCI   Type    X-Interface  X-VPI X-VCI Dir    Status
ATM0/0/2     0     5     PVC     ATM0/1/1     0     5     Rx     DOWN    
ATM0/0/2     0     16    PVC     ATM0/1/1     0     16    Rx     DOWN    
ATM0/1/2     0     5     PVC     ATM0/0/1     0     5     Tx     DOWN    
ATM0/1/2     0     16    PVC     ATM0/0/1     0     16    Tx     DOWN    
ATM0/1/2     0     18    PVC     ATM0/0/1     0     18    Tx     UP      
ATM0/1/2     0     100   PVC     ATM0/0/1     0     100   Tx     DOWN    
ATM0/1/2     0     201   PVC     ATM0/0/1     0     201   Tx     DOWN    
ATM0/1/2     0     202   PVC     ATM0/0/1     0     202   Tx     DOWN    
ATM0/1/2     0     300   PVC     ATM0/0/1     0     300   Tx     DOWN    
ATM0/1/2     0     301   PVC     ATM0/0/1     0     301   Tx     DOWN    
Switch>

The following example shows the VC snoop connections on ATM interface 0/1/2:

Switch> show atm snoop-vc interface atm 0/1/2

      Snooping                            Snooped                   
Interface    VPI   VCI   Type    X-Interface  X-VPI X-VCI Dir    Status
ATM0/1/2     0     5     PVC     ATM0/0/1     0     5     Tx     DOWN    
ATM0/1/2     0     16    PVC     ATM0/0/1     0     16    Tx     DOWN    
ATM0/1/2     0     18    PVC     ATM0/0/1     0     18    Tx     UP      
ATM0/1/2     0     100   PVC     ATM0/0/1     0     100   Tx     DOWN    
ATM0/1/2     0     201   PVC     ATM0/0/1     0     201   Tx     DOWN    
ATM0/1/2     0     202   PVC     ATM0/0/1     0     202   Tx     DOWN    
ATM0/1/2     0     300   PVC     ATM0/0/1     0     300   Tx     DOWN    
ATM0/1/2     0     301   PVC     ATM0/0/1     0     301   Tx     DOWN    
Switch>

The following example shows the VC snoop connection 0, 55 on ATM interface 0/0/2 in extended mode:

Switch> show atm snoop-vc interface atm 0/0/2 0 55

Interface: ATM0/0/2, Type: oc3suni 
VPI = 0  VCI = 55
Status: DOWN
Time-since-last-status-change: 00:01:59
Connection-type: PVC 
Cast-type: snooping-leaf
Packet-discard-option: disabled
Usage-Parameter-Control (UPC): pass
Wrr weight: 32
Number of OAM-configured connections: 0
OAM-configuration: disabled
OAM-states:  Not-applicable
Cross-connect-interface: ATM0/1/1, Type: oc3suni 
Cross-connect-VPI = 0 
Cross-connect-VCI = 5
Cross-connect-UPC: pass
Cross-connect OAM-configuration: disabled
Cross-connect OAM-state:  Not-applicable
Threshold Group: 6, Cells queued: 0
Rx cells: 0, Tx cells: 0
Rx connection-traffic-table-index: 3
Rx service-category: VBR-RT (Realtime Variable Bit Rate)
Rx pcr-clp01: 424
Rx scr-clp01: 424
Rx mcr-clp01: none
Rx tolerance: 50
Tx connection-traffic-table-index: 3
Tx service-category: VBR-RT (Realtime Variable Bit Rate)
Tx pcr-clp01: 424
Tx scr-clp01: 424
Tx mcr-clp01: none
Tx tolerance: 50
Switch>

The following example shows all VP snoop connections on the switch:

Switch> show atm snoop-vp

      Snooping                    Snooped               
Interface    VPI   Type    X-Interface  X-VPI Dir    Status
ATM0/1/2     57    PVP     ATM0/0/1     57    Tx     DOWN    
Switch>

The following example shows all VP snoop connections on ATM interface 0/1/2, VPI = 57, in extended mode:

Switch> show atm snoop-vp interface atm 0/1/2 57

Interface: ATM0/1/2, Type: oc3suni 
VPI = 57  
Status: DOWN
Time-since-last-status-change: 00:14:46
Connection-type: PVP 
Cast-type: snooping-leaf
Usage-Parameter-Control (UPC): pass
Wrr weight: 32
Number of OAM-configured connections: 0
OAM-configuration: disabled
OAM-states:  Not-applicable
Cross-connect-interface: ATM0/0/2, Type: oc3suni 
Cross-connect-VPI = 57 
Cross-connect-UPC: pass
Cross-connect OAM-configuration: disabled
Cross-connect OAM-state:  Not-applicable
Threshold Group: 5, Cells queued: 0
Rx cells: 0, Tx cells: 0
Rx connection-traffic-table-index: 1
Rx service-category: UBR (Unspecified Bit Rate)
Rx pcr-clp01: 7113539
Rx scr-clp01: none
Rx mcr-clp01: none
Rx tolerance: 1024 (from default for interface)
Tx connection-traffic-table-index: 1
Tx service-category: UBR (Unspecified Bit Rate)
Tx pcr-clp01: 7113539
Tx scr-clp01: none
Tx mcr-clp01: none
Tx tolerance: none
Switch>

Task	Command
Display the snoop VC information.	show atm snoop-vc [interface atm card/subcard/port [x_vpi x_vci]]
Display the snoop VP information.	show atm snoop-vp [interface atm card/subcard/port [x_vpi]]

Table of Contents

Configuring Virtual Connections

Example

Example

Examples

Examples

Example

Example

Examples

Examples

Examples

Example

Examples

Examples

Example

Examples

Example

Example

Example

Example

Snooping the Receive Direction

Snooping the Transmit Direction

Snoop Test Port is Highest Port

Effect of Snooping on Monitored Port

Test Port Shutdown for Snoop Mode Configuration

Other Configuration Options for Snoop Test Port

Examples

Example

Examples

Examples