Configuring ATM Interfaces

This chapter describes how to explicitly configure ATM network interface types. Explicitly configuring interfaces is the alternative to Interim Local Management Interface (ILMI) autoconfiguration, which senses the peer interface type and appropriately configures the LightStream 1010 ATM switch interface.

The network configuration tasks described in this chapter are used to explicitly change your ATM switch operation from the defaults, which are suitable for most networks. The following sections are included:

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

Example Network Configuration

The example network shown in Figure 8-1 illustrates some standard ATM interface configuration tasks you might want to perform after completing the tasks in the chapter "Initially Configuring the LightStream 1010 ATM Switch."

Figure 8-1: Example Network Configuration

The network configuration shown in Figure 8-1 is an example of a corporate campus ATM backbone network connecting three buildings with an ATM connection across the WAN to a remote sales office.

The following examples describe a hypothetical configuration of the network shown in Figure 8-1:

Disabling Autoconfiguration

Autoconfiguration determines the type of interface every time an interface comes up initially. You must disable the autoconfiguration feature on an interface before you configure the interface protocol, for example, if you want to configure the interface to be a User-to-Network Interface (UNI).

To disable autoconfiguration on an interface, perform the following steps, beginning in global configuration mode:

Step Command Task

1
interface atm card/subcard/port [.vpt #]

Select the interface to be configured.

2
no atm auto-configuration

Disable autoconfiguration on the interface.

Step	Command	Task
1	interface atm card/subcard/port [.vpt #]	Select the interface to be configured.
2	no atm auto-configuration	Disable autoconfiguration on the interface.

Example

The following example shows how to disable autoconfiguration on interface ATM 1/0/0:

Switch(config)# interface atm 1/0/0
Switch(config-if)# no atm auto-configuration 
Switch(config-if)#
%ATM-6-ILMINOAUTOCFG: ILMI(ATM1/0/0): Auto-configuration is disabled, current interface parameters will be used at next interface restart.

Display the Autoconfiguration

To confirm that autoconfiguration is disabled for the interface, use the following EXEC command:

Command Task

show atm interface atm card/subcard/port

Show the ATM switch configuration.

Command	Task
show atm interface atm card/subcard/port	Show the ATM switch configuration.

Example

The following example shows how to display the autoconfiguration status of ATM interface 1/0/0 as disabled:

Switch# atm interface atm 1/0/0
 
Interface:      ATM1/0/0        Port-type:    oc3suni
IF Status:      UP              Admin Status: up
Auto-config:    disabled        AutoCfgState: not applicable
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: 47.0091.8100.0000.0040.0b0a.2b81.4000.0c80.8000.00
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:    234663          Output cells: 235483
5 minute input rate:             0 bits/sec,       0 cells/sec
5 minute output rate:            0 bits/sec,       0 cells/sec
Input AAL5 pkts: 153211, Output AAL5 pkts: 153626, AAL5 crc errors: 0

Configuring UNI Interfaces

The UNI specification defines communications between ATM end stations (such as workstations and routers) and ATM switches in private ATM networks.

To configure a UNI interface between the LightStream 1010-1 (HB-1) in the Headquarters building to the Cisco 7000 (HB-1) in the same building, use the atm uni command in interface configuration mode. See Figure 8-2 for a detail of this type of network connection.

Figure 8-2: Multiple Link UNI Example

To configure the UNI interface, perform the following steps, beginning in global configuration mode:

Step Command Task

1
interface atm card/subcard/port

Select the interface to be configured.

2
no atm auto-configuration

Disable autoconfiguration on the interface.

3
atm uni [side {network | user}]
[type {private | public}]
[version {3.0 | 3.1 | 4.0}]

Configure the ATM UNI interface.

Step	Command	Task
1	interface atm card/subcard/port	Select the interface to be configured.
2	no atm auto-configuration	Disable autoconfiguration on the interface.
3	atm uni [side {network \| user}] [type {private \| public}] [version {3.0 \| 3.1 \| 4.0}]	Configure the ATM UNI interface.

Note Whenever a change in the interface protocol (such as UNI, NNI, or IISP), side, or version is configured, ATM signaling and ILMI is restarted on the interface. When ATM signaling is restarted, all switched virtual connections (SVCs) across the interface are cleared; permanent virtual connections are not affected.

Example

The following example shows how to disable autoconfiguration on ATM interface 0/1/0 and to configure the interface as the user side of a private UNI running version 4.0:

LS1010-1(HB-1)(config)# interface atm 0/1/0
LS1010-1(HB-1)(config-if)# no atm auto-configuration
LS1010-1(HB-1)(config-if)#
%ATM-6-ILMINOAUTOCFG: ILMI(ATM0/1/0): Auto-configuration is disabled, current interface parameters will be used at next interface restart.
LS1010-1(HB-1)(config-if)# atm uni side user type private version 4.0
LS1010-1(HB-1)(config-if)#
%ATM-5-ATMSOFTSTART: Restarting ATM signalling and ILMI on ATM0/1/0.

Display ATM Interface UNI Configuration

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

Command Task

show atm interface atm card/subcard/port

Show the ATM switch configuration.

Command	Task
show atm interface atm card/subcard/port	Show the ATM switch configuration.

Example

The following example shows how to display the ATM interface 0/1/0 UNI configuration:

LS1010-1(HB-1)# show atm interface atm 0/1/0
 
Interface:      ATM0/1/0        Port-type:    oc3suni
IF Status:      UP              Admin Status: up
Auto-config:    disabled        AutoCfgState: not applicable
IF-Side:        User            IF-type:      UNI
Uni-type:       Private         Uni-version:  V4.0
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: 47.0091.8100.0000.0040.0b0a.2b81.4000.0c80.8000.00
Configured virtual links:
  PVCLs SoftVCLs   SVCLs   PVPLs SoftVPLs   SVPLs  Total-Cfgd  Installed-Conns
      2        0       0       0        0       0           2                2
Logical ports(VP-tunnels):     0
Input cells:    234810          Output cells: 235618
5 minute input rate:             0 bits/sec,       0 cells/sec
5 minute output rate:            0 bits/sec,       0 cells/sec
Input AAL5 pkts: 153296, Output AAL5 pkts: 153712, AAL5 crc errors: 0

Configuring NNI Interfaces

This section describes configuring a Network-to-Network Interface (NNI) connection between two switches. The example used in this section is to configure the Private NNI (PNNI) interface from the LightStream 1010-1 (HB-1) in the Headquarters building to the LightStream 1010 (EB-1) in the Engineering building, as shown in Figure 8-3.

Figure 8-3: Private NNI Interface Example

You must configure PNNI connections between the ATM switches to allow for route discovery and topology analysis between the switches. To configure the NNI interface, perform the following steps, beginning in global configuration mode:

Step Command Task

1
interface atm card/subcard/port

Select the interface to be configured.

2
no atm auto-configuration

Disable autoconfiguration on the interface.

3
atm nni

Configure the ATM NNI interface.

Step	Command	Task
1	interface atm card/subcard/port	Select the interface to be configured.
2	no atm auto-configuration	Disable autoconfiguration on the interface.
3	atm nni	Configure the ATM NNI interface.

Note Whenever a change in the interface protocol (such as UNI, NNI, or IISP), side, or version is configured, ATM signaling and ILMI are restarted on the interface. When ATM signaling is restarted, all switched virtual connections (SVCs) across the interface are cleared; permanent virtual connections are not affected.

Example

The following example shows how to configure ATM interface 3/0/0 as an NNI interface:

LS1010-1(HB-1)(config)# interface atm 3/0/0
LS1010-1(HB-1)(config-if)# no atm auto-configuration
LS1010-1(HB-1)(config-if)# 
%ATM-6-ILMINOAUTOCFG: ILMI(ATM3/0/0): Auto-configuration is disabled, current interface parameters will be used at next interface restart.
LS1010-1(HB-1)(config-if)# atm nni
LS1010-1(HB-1)(config-if)# 
%ATM-5-ATMSOFTSTART: Restarting ATM signalling and ILMI on ATM3/0/0.

Display the NNI Interface Configuration

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

Command Task

show atm interface atm card/subcard/port

Show the ATM switch configuration.

Command	Task
show atm interface atm card/subcard/port	Show the ATM switch configuration.

Example

The following example shows how to display the configuration of the NNI interface 3/0/0 on the LightStream 1010-1 (HB-1) located in the headquarters building:

LS1010-1(HB-1)#  show atm interface atm 3/0/0 
 
Interface:      ATM3/0/0        Port-type:    oc3suni
IF Status:      UP              Admin Status: up
Auto-config:    disabled        AutoCfgState: not applicable
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: 47.0091.8100.0000.0040.0b0a.2b81.4000.0c80.8000.00
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:    234911          Output cells: 235695
5 minute input rate:             0 bits/sec,       0 cells/sec
5 minute output rate:            0 bits/sec,       0 cells/sec
Input AAL5 pkts: 153346, Output AAL5 pkts: 153764, AAL5 crc errors: 0

Configuring IISP Interfaces

This section describes how to configure the Interim Interswitch Signaling Protocol (IISP) interface from the LightStream 1010 (SB-1) in the Remote Sales building to the LightStream 1010 (SB-1) in the same building. Figure 8-4 shows an example of this type of network configuration.

Figure 8-4: IISP Network Segment Example

Some ATM switches do not support the Private Network-to-Network Interface (PNNI) protocol. Switched virtual circuit (SVC) support can be provided by configuring the interface to use IISP.

To configure the IISP interfaces in Figure 8-4, perform the following tasks, beginning in global configuration mode:

Step Command Task

1
interface atm card/subcard/port[.sub_inter #]

Select the interface to be configured.

2
no atm auto-configuration

Disable autoconfiguration on the interface.

3
atm iisp [side {network | user}]
[version {3.0 | 3.1 | 4.0}]

Configure the ATM IISP interface.

4
exit

Exit interface configuration mode.

5
atm route prefix atm-address-prefix atm card/subcard/port[.sub_inter #]

Configure the ATM route address prefix.

Step	Command	Task
1	interface atm card/subcard/port[.sub_inter #]	Select the interface to be configured.
2	no atm auto-configuration	Disable autoconfiguration on the interface.
3	atm iisp [side {network \| user}] [version {3.0 \| 3.1 \| 4.0}]	Configure the ATM IISP interface.
4	exit	Exit interface configuration mode.
5	atm route prefix atm-address-prefix atm card/subcard/port[.sub_inter #]	Configure the ATM route address prefix.

Example

The following example shows how to configure ATM interface 3/0/0 on the LightStream 1010 (SB-1) located in the Remote Sales building, with the following:

No autoconfiguration
IISP
Side as user
ATM route address prefix as 47.0091.8100.0000.0000.0ca7.ce01

LS1010(SB-1)(config)# interface atm 3/0/0
LS1010(SB-1)(config-if)# no atm auto-configuration
LS1010(SB-1)(config-if)# 
%ATM-6-ILMINOAUTOCFG: ILMI(ATM3/0/0): Auto-configuration is disabled, current interface parameters will be used at next interface restart.
LS1010(SB-1)(config-if)# atm iisp side user
LS1010(SB-1)(config-if)# 
%ATM-5-ATMSOFTSTART: Restarting ATM signalling and ILMI on ATM3/0/0.
LS1010(SB-1)(config-if)# exit
LS1010(SB-1)(config)# atm route 47.0091.8100.0000.0000.0ca7.ce01 atm 3/0/0

Display the IISP Configuration

To show the interface IISP configuration, use the following EXEC command:

Command Task

show atm interface atm card/subcard/port

Show the interface.

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

Example

The following example shows the configuration of the LightStream 1010 (SB-1) located in the Remote Sales building at interface 3/0/0:

LS1010(SB-1)# show atm interface atm 3/0/0
 
Interface:      ATM3/0/0        Port-type:    oc3suni
IF Status:      DOWN            Admin Status: down
Auto-config:    disabled        AutoCfgState: not applicable
IF-Side:        User            IF-type:      IISP
Uni-type:       not applicable  Uni-version:  V3.0
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: 47.0091.8100.0000.0040.0b0a.2b81.4000.0c81.8000.00
Configured virtual links:
  PVCLs SoftVCLs   SVCLs   PVPLs SoftVPLs   SVPLs  Total-Cfgd  Installed-Conns
      2        0       0       0        0       0           2                0
Logical ports(VP-tunnels):     0
Input cells:    0               Output cells: 0
5 minute input rate:             0 bits/sec,       0 cells/sec
5 minute output rate:            0 bits/sec,       0 cells/sec
Input AAL5 pkts: 0, Output AAL5 pkts: 0, AAL5 crc errors: 0

Configuring a Public Network Tunnel Interface

This section describes configuring the DS3 public UNI ATM connection as a virtual path (VP) tunnel from the Headquarters building across the WAN to the Remote Sales building.

Note A VP tunnel is configured as a VP of a particular service category. Only virtual circuits (VCs) of that service category can transit the tunnel.

Figure 8-5 shows a detail of the example network being configured.

Figure 8-5: Public VP Tunnel Network Example

Public DS3 carriers can interconnect switches using permanent VPs across their networks. To support signaling across the public network between the LightStream 1010-1 (HB-1) in the Headquarters building and the Remote Sales building the LightStream 1010 (SB-1), a VP tunnel must be configured.

To configure a VP tunnel connection, perform the following steps, beginning in global configuration mode:

Step Command Task

2
atm connection-traffic-table-row [index row-index] cbr pcr rate [tolerance cell-count]

Optionally, configure the connection-traffic-table-row index for any nondefault index values.

3
interface atm card/subcard/port

Select the physical interface to be configured.

4
atm pvp vpi [rx-cttr index] [tx-cttr index]

Configure an interface permanent virtual path (PVP) leg.

5
exit

Change to configuration mode.

6
interface atm card/subcard/port.vpt #

Create a VP tunnel using a VPT number that matches the PVP leg virtual path identifier (VPI).

Step	Command	Task
2	atm connection-traffic-table-row [index row-index] cbr pcr rate [tolerance cell-count]	Optionally, configure the connection-traffic-table-row index for any nondefault index values.
3	interface atm card/subcard/port	Select the physical interface to be configured.
4	atm pvp vpi [rx-cttr index] [tx-cttr index]	Configure an interface permanent virtual path (PVP) leg.
5	exit	Change to configuration mode.
6	interface atm card/subcard/port.vpt #	Create a VP tunnel using a VPT number that matches the PVP leg virtual path identifier (VPI).

Note The row index for no-default rx-cttr and tx-cttr must be configured before using this optional parameter. See the atm connection-traffic-table-row command in the LightStream 1010 ATM Switch Command Reference publication for a detailed description.

Examples

The following example shows how to configure the ATM VP tunnel on the LightStream 1010-1 (HB-1) located in the Headquarters building at interface 1/0/0, VPI 99 to the LightStream 1010 (SB-1) located in the Remote Sales building at interface 4/0/0, VPI 99:

LS1010-1(HB-1)(config)# interface atm 1/0/0
LS1010-1(HB-1)(config-if)# atm pvp 99
LS1010-1(HB-1)(config-if)# exit
LS1010-1(HB-1)(config)# interface atm 1/0/0.99
LS1010-1(HB-1)(config-subif)# end
LS1010-1(HB-1)# 
%SYS-5-CONFIG_I: Configured from console by console

The following example shows how to configure the ATM VP tunnel on the LightStream 1010 (SB-1), located in the Remote Sales building at interface 4/0/0, VPI 99:

LS1010(SB-1)(config)# interface atm 4/0/0
LS1010(SB-1)(config-if)# atm pvp 99
LS1010(SB-1)(config-if)# exit
LS1010(SB-1)(config)# interface atm 4/0/0.99
LS1010(SB-1)(config-subif)# end
LS1010(SB-1)# 
%SYS-5-CONFIG_I: Configured from console by console

Display the VP Tunnel Configuration

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

Command Task

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

Show the ATM interface configuration.

Command	Task
show atm interface [atm card/subcard/port[.vpt #]]	Show the ATM interface configuration.

Example

The following example shows how to display the configuration of the LightStream 1010-1 (HB-1), located in the Headquarters building at subinterface 1/0/0.99:

LS1010-1(HB-1)# show atm interface atm 1/0/0.99
 
Interface:      ATM1/0/0.99     Port-type:    vp tunnel
IF Status:      UP              Admin Status: up
Auto-config:    enabled         AutoCfgState: waiting for response from peer
IF-Side:        Network         IF-type:      UNI
Uni-type:       Private         Uni-version:  V3.0
Max-VPI-bits:   0               Max-VCI-bits: 14
Max-VP:         0               Max-VC:       16383
Signalling:     Enabled
ATM Address for Soft VC: 47.0091.8100.0000.0040.0b0a.2b81.4000.0c80.8000.63
Configured virtual links:
  PVCLs SoftVCLs   SVCLs  Total-Cfgd  Installed-Conns
      4        0       0           4                4

Configuring Signalling VPCI for PVP Tunnels

To specify the value of the virtual path connection identifier (VPCI) that is to be carried in the signalling messages with in a VP tunnel, use the atm signalling vpci subinterface configuration command.

Note By default, the VPCI is the same as the VPI on the ATM switch.

The connection identifier information element (IE) is used in signalling messages to identify the corresponding user information flow. The connection identifier IE contains the VPCI and VCI.

For example, if you want to configure a PVP tunnel connection from a LightStream 1010 ATM switch on VPI 2, VCI X, to a router with a virtual path switch in between, the signalling message would contain connection ID, VPI 2, VCI X. Since the PVP tunnel at the router end is on VPI 3, VCI X, the connection is refused. By configuring VPCI to 3, you can configure the signalling message explicitly to contain connection ID VPI 3, VCI X, instead of containing VPI 2, VCI X.

This command can also be used to support virtual User-Network Interface (UNI) connections.

To configure a VP tunnel connection signalling VPCI, perform the following steps, beginning in global configuration mode:

Step Command Task

1
interface atm card/subcard/port.vpt #

Select the subinterface.

2
atm signalling vpci vpci_number

Configure the atm signalling VPCI number 0 to 255.

Step	Command	Task
1	interface atm card/subcard/port.vpt #	Select the subinterface.
2	atm signalling vpci vpci_number	Configure the atm signalling VPCI number 0 to 255.

Example

The following example configures a PVP tunnel on ATM interface 0/0/0, PVP 99, and then configures the connection ID VCPI as 0 in subinterface configuration mode.

Switch(config)# interface atm 1/0/0
Switch(config-if)# atm pvp 99
Switch(config-if)# exit
Switch(config)# interface atm 1/0/0.99


 
  Switch(config-subif)# atm signalling vpci 0

Display the PVP Tunnel VPCI Configuration

To confirm the PVP tunnel VPCI configuration, use the following privileged EXEC command:

Command Task

show running-config

Show the PVP tunnel subinterface configuration.

Command	Task
show running-config	Show the PVP tunnel subinterface configuration.

Delete VP Tunnels

To delete a VP tunnel connection, perform the following steps, beginning in global configuration mode:

Step Command Task

1
no interface atm card/subcard/port[.vpt #]

Delete the subinterface.

2
interface atm card/subcard/port

Select the physical interface to be modified.

3
no atm pvp vpi

Delete the interface PVP half-leg.

Step	Command	Task
1	no interface atm card/subcard/port[.vpt #]	Delete the subinterface.
2	interface atm card/subcard/port	Select the physical interface to be modified.
3	no atm pvp vpi	Delete the interface PVP half-leg.

Example

The following example shows deleting subinterface 99 at ATM interface 1/0/0 and the PVP half-leg 99:

LS1010-1(HB-1)(config)# no interface atm 1/0/0.99
LS1010-1(HB-1)(config)# interface atm 1/0/0
LS1010-1(HB-1)(config-if)# no atm pvp 99

Confirm VP Deletion

To confirm the ATM virtual interface deletion, use the following EXEC command:

Command Task

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

Show the ATM interface configuration.

Command	Task
show atm interface [atm card/subcard/port[.vpt #]]	Show the ATM interface configuration.

Example

The following example shows how to confirm the deletion of ATM subinterface 1/0/0.99 on the LightStream 1010-1 (HB-1), located in the Headquarters building:

LS1010-1(HB-1)# show interface atm 1/0/0
 
Interface:      ATM1/0/0        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
ATM Address for Soft VC: 47.0091.8100.0000.0040.0b0a.2b81.4000.0c80.8000.00
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:    233651          Output cells: 234465
5 minute input rate:             0 bits/sec,       0 cells/sec
5 minute output rate:            0 bits/sec,       0 cells/sec
Input AAL5 pkts: 152555, Output AAL5 pkts: 152967, AAL5 crc errors: 0

Configure a PVC to a VP Tunnel

To configure an endpoint of a permanent virtual circuit (PVC) to a previously created PVP tunnel, perform the following steps, beginning in global configuration mode:

Step Command Task

1
interface atm card/subcard/port

Select the physical interface to be configured.

2
atm pvc vpi vci [upc upc] [pd pd] [rx-cttr index] [tx-cttr index] interface atm card/subcard/port[.vpt #] vpi vci [upc upc]

Configure the PVC with the VPI of the tunnel leg matching the tunnel VPT number.

Step	Command	Task
1	interface atm card/subcard/port	Select the physical interface to be configured.
2	atm pvc vpi vci [upc upc] [pd pd] [rx-cttr index] [tx-cttr index] interface atm card/subcard/port[.vpt #] vpi vci [upc upc]	Configure the PVC with the VPI of the tunnel leg matching the tunnel VPT number.

The following restrictions must apply to an endpoint of a PVC-to-PVP tunnel subinterface:

The VPI number of the tunnel leg of any PVC connection must match the VPT number of the tunnel.

The service class (for example, constant bit rate [CBR]), variable bit rate [VBR], unspecified bit rate [UBR], as specified by the connection-traffic-table-row [CTTR]) of any PVC connections must match the service class for the row(s) selected for the tunnel PVP.
For service classes other than UBR and available bit rate (ABR), the peak cell rates of all PVCs must be within the peak cell rate of the tunnel PVP. This setup requires new CTTR rows to be defined for CBR or VBR PVCs, with peak cell rates that are less than the intended tunnel PVP.

Example

The following example shows how to configure the example tunnel ATM1/0/0.99 with a UBR PVC from interface ATM 0/0/1 to the tunnel at ATM interface 1/0/0.99:

LS1010-1(HB-1)(config)# interface atm 0/0/1
LS1010-1(HB-1)(config-if)# atm pvc 0 50 interface atm 1/0/0.99 99 40

Display PVCs

To confirm the ATM virtual circuit interface configuration, use the following EXEC command:

Command Task

show atm vc interface atm card/subcard/port

Show the ATM VC interface configuration.

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

Example

The following example shows how to confirm the configuration of ATM subinterface 1/0/0.99 on the LightStream 1010-1 (HB-1) located in the Headquarters building:

LS1010-1(HB-1)# show atm vc interface atm 0/0/1
Interface    VPI   VCI   Type    X-Interface  X-VPI X-VCI  Encap Status
ATM0/0/1     0     5      PVC     ATM2/0/0     0     41    QSAAL  UP
ATM0/0/1     0     16     PVC     ATM2/0/0     0     33    ILMI   UP
ATM0/0/1     0     50     PVC     ATM1/0/0.99  99    40           UP

Configuring a VPI/VCI Range for SVPs/SVCs

You can configure a virtual path identifier/virtual channel identifier (VPI/VCI) range for switched virtual circuits/switched virtual paths (SVCs/SVPs). This feature allows you to:

Specify ranges for SVCs and SVPs.
Avoid VPI/VCI conflicts when attempting to set up soft PVCs or soft PVPs. For example, if you specify a soft PVC with VPI 0 and VCI 50 on the destination interface, an SVC on that interface might have already taken VPI 0 and VPI 50 just before the soft PVC setup message arrives at the destination interface. In this case, the soft PVC is rejected because VPI 0 and VPI 50 are already taken. By specifying the VPI/VCI range for SVPs/SVCs, you can avoid connection setup rejections.

You can still configure PVCs and PVPs in any supported range, including any VPI/VCI range you configured for SVCs/SVPs.

Note This feature is supported in ILMI 4.0.

The default maximum switched virtual path connection (SVPC) VPI is equal to the maximum VPI supported on the interface. You can change the maximum SVPC VPI by entering the atm svpc vpi max value command. Substitute value with:

A number in range of 0 to 3 for 25-Mbps interfaces.
A number in range of 0 to 255 for all other interfaces except logical interfaces, which have a fixed value of 0.

In the example shown in Figure 8-6, the maximum SVPC VPI is 100. Therefore, VPIs 1 to 100 are reserved for SVPCs. You can use VPIs 101 to 255 for PVPs; however, you are not restricted to that range.

Figure 8-6: Example SVPC VPI Range

The default maximum switched virtual channel connection (SVCC) VPI is equal to the maximum VPI supported on the interface. You can change the maximum SVCC VPI by entering the atm svcc vpi max value command. Substitute value with:

A number in the range of 0 to 3 for 25-Mbps interfaces.
A number in the range of 0 to 255 for all other interfaces except logical interfaces, which have a fixed value of 0.

The default minimum SVCC VCI is equal to 35. You can change the minimum SVCC VCI by entering the atm svcc vci min value command. Substitute value with a number in the range of 32 to 4095.

In the example shown in Figure 8-7, the maximum SVCC VPI is 100 and the minimum SVCC VCI is 60. Therefore, VPIs 0 through 100 and VCIs 60 through 16,383 are reserved for SVCCs.

Figure 8-7: Example SVCC VPI/VCI Range

Every interface negotiates the local values for the maximum SVPC VPI, maximum SVCC VPI, and minimum SVCC VCI with the peer's local value during ILMI initialization. The negotiated values determine the ranges for SVPs and SVCs. If the peer interface does not support these objects or autoconfiguration is turned off on the local interface, the local values determine the range.

To configure a VPI/VCI range for SVCs/SVPs, perform the following steps, beginning in global configuration mode:

Step Command Task

1
interface atm card/subcard/port[.subinterface#]

Select the physical interface to be configured.

2
atm svpc vpi max value

Configure the maximum VPI value for a SVPC.

3
atm svcc vpi max value

Configure the maximum VPI value for a SVCC.

4
atm svcc vci min value

Configure the minimum VCI value for a SVCC.

Step	Command	Task
1	interface atm card/subcard/port[.subinterface#]	Select the physical interface to be configured.
2	atm svpc vpi max value	Configure the maximum VPI value for a SVPC.
3	atm svcc vpi max value	Configure the maximum VPI value for a SVCC.
4	atm svcc vci min value	Configure the minimum VCI value for a SVCC.

Display the VPI/VCI Range Configuration

To confirm the VPI/VCI range configuration, use one of the following commands:

Command Task

show atm interface atm card/subcard/port [.subinterface#]

Show the ATM interface configuration.

show atm ilmi-status atm card/subcard/port [.subinterface#]

Show the ILMI status on the ATM interface.

Command	Task
show atm interface atm card/subcard/port [.subinterface#]	Show the ATM interface configuration.
show atm ilmi-status atm card/subcard/port [.subinterface#]	Show the ILMI status on the ATM interface.

Examples

The following example shows how to confirm the VPI/VCI range configuration on an ATM interface. The values displayed for ConfMaxSvpcVpi, ConfMaxSvccVpi, and ConfMinSvccVci are local values. The values displayed for CurrMaxSvpcVpi, CurrMaxSvccVpi, and CurrMinSvccVci are negotiated values.

Switch# show atm interface atm 0/0/0
 
Interface:      ATM0/0/0        Port-type:      oc3suni
IF Status:      DOWN            Admin Status:   down
Auto-config:    enabled         AutoCfgState:   waiting for response from peer
IF-Side:        Network         IF-type:        UNI
Uni-type:       Private         Uni-version:    V3.0
Max-VPI-bits:   8               Max-VCI-bits:   14
Max-VP:         255             Max-VC:         16383


 
  ConfMaxSvpcVpi: 100             CurrMaxSvpcVpi: 100


 
  ConfMaxSvccVpi: 100             CurrMaxSvccVpi: 100


 
  ConfMinSvccVci: 60              CurrMinSvccVci: 60
Svc Upc Intent: pass            Signalling:     Enabled
ATM Address for Soft VC: 47.0091.8100.0000.0040.0b0a.2a81.4000.0c80.0000.00
Configured virtual links:
  PVCLs SoftVCLs   SVCLs   TVCLs   PVPLs SoftVPLs   SVPLs Total-Cfgd Inst-Conns
      3        0       0       0       0        0       0          3          0
Logical ports(VP-tunnels):     0
Input cells:    0               Output cells:   0
5 minute input rate:             0 bits/sec,       0 cells/sec
5 minute output rate:            0 bits/sec,       0 cells/sec
Input AAL5 pkts: 0, Output AAL5 pkts: 0, AAL5 crc errors: 0

The following example shows how to confirm the peer's local values for VPI/VCI range configuration by displaying the ILMI status on an ATM interface:

Switch# show atm ilmi-status atm 0/0/0
 
Interface : ATM0/0/0 Interface Type : Private NNI 
ILMI VCC : (0, 16) ILMI Keepalive : Disabled
Addr Reg State:   UpAndNormal
Peer IP Addr:     172.20.40.232   Peer IF Name:     ATM0/0/0
Peer MaxVPIbits:  8               Peer MaxVCIbits:  14


 
  Peer MaxVPCs:     255             Peer MaxVCCs:     16383 


 
  Peer MaxSvccVpi:  255             Peer MinSvccVci:  255 


 
  Peer MaxSvpcVpi:  48 
Configured Prefix(s) :
47.0091.8100.0000.0010.11ba.9901

Note Note that the show atm ilmi-status command displays the information above only if the peer supports it.

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Configuring ATM Interfaces

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