Configuring ATM Network Interfaces

Table Of Contents

Configuring ATM Network Interfaces

Disabling Autoconfiguration

Displaying the Autoconfiguration

Configuring UNI Interfaces

Displaying the UNI Interface Configuration

Configuring NNI Interfaces

Displaying the NNI Interface Configuration

Configuring a 12-Bit VPI NNI Interface (Catalyst 8540 MSR)

Configuring IISP Interfaces

Displaying the IISP Configuration

Configuring ATM Network Interfaces

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

Note This chapter provides advanced configuration instructions for the Catalyst 8540 MSR, Catalyst 8510 MSR, and LightStream 1010 ATM switch routers. For a discussion and examples of ATM network interface types, refer to the Guide to ATM Technology. For complete descriptions of the commands mentioned in this chapter, refer to the ATM Switch Router Command Reference publication.

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

• Disabling Autoconfiguration

• Configuring UNI Interfaces

• Configuring NNI Interfaces

• Configuring IISP Interfaces

Disabling Autoconfiguration

Autoconfiguration determines an interface type when the interface initially comes up. To change the configuration of the interface type (such as UNI, NNI, or IISP), side, or version, you must first disable autoconfiguration.

Note When you change the interface type, side, or version, ATM signalling and ILMI are restarted on the interface. When ATM signalling is restarted, all switched virtual connections (SVCs) across the interface are cleared; permanent virtual connections are not affected.

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

Command

Purpose

Step 1

Switch(config)# interface atm card/subcard/port[.vpt#]

Switch(config-if)#

Selects the interface to be configured.

Step 2

Switch(config-if)# no atm auto-configuration

Disables autoconfiguration on the interface.

Example

The following example shows how to disable autoconfiguration on interface ATM 1/0/0:
Switch(config)# interface atm 1/0/0Switch(config-if)# no atm auto-configurationSwitch(config-if)#%ATM-6-ILMINOAUTOCFG: ILMI(ATM1/0/0): Auto-configuration is disabled, current interface parameters will be used at next interface restart.
Displaying the Autoconfiguration

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

Command

Purpose

show atm interface atm card/subcard/port

Shows the ATM interface configuration.

Example

The following example shows the autoconfiguration status of ATM interface 1/0/0 as disabled:
Switch# show atm interface atm 1/0/0
Interface: ATM1/0/0 Port-type: oc3suniIF Status: UP Admin Status: upAuto-config: disabled AutoCfgState: not applicableIF-Side: Network IF-type: NNIUni-type: not applicable Uni-version: not applicableMax-VPI-bits: 8 Max-VCI-bits: 14Max-VP: 255 Max-VC: 16383ConfMaxSvpcVpi: 255 CurrMaxSvpcVpi: 255ConfMaxSvccVpi: 255 CurrMaxSvccVpi: 255ConfMinSvccVci: 35 CurrMinSvccVci: 35Svc Upc Intent: pass Signalling: EnabledATM Address for Soft VC: 47.0091.8100.0000.00e0.4fac.b401.4000.0c80.8000.00Configured virtual links:PVCLs SoftVCLs SVCLs TVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Inst-Conns4 0 0 0 1 0 0 5 3Logical ports(VP-tunnels): 0Input cells: 263250 Output cells: 2697835 minute input rate: 0 bits/sec, 0 cells/sec5 minute output rate: 0 bits/sec, 0 cells/secInput AAL5 pkts: 171880, Output AAL5 pkts: 175134, AAL5 crc errors: 0
Configuring UNI Interfaces

The User-Network Interface (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, perform the following steps, beginning in global configuration mode:

Command

Purpose

Step 1

Switch(config)# interface atm card/subcard/port[.vpt#]

Switch(config-if)#

Selects the interface to be configured.

Step 2

Switch(config-if)# no atm auto-configuration

Disables autoconfiguration on the interface.

Step 3

Switch(config-if)# atm uni [side {network | user}] [type {private | public}]
[version {3.0 | 3.1 | 4.0}]

Configures the ATM UNI interface.

Example

The following example shows how to disable autoconfiguration on ATM interface 0/1/0 and configure the interface as the user side of a private UNI running version 4.0:
Switch(HB-1)(config)# interface atm 0/1/0Switch(HB-1)(config-if)# no atm auto-configurationSwitch(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.Switch(HB-1)(config-if)# atm uni side user type private version 4.0Switch(HB-1)(config-if)#%ATM-5-ATMSOFTSTART: Restarting ATM signalling and ILMI on ATM0/1/0.
Displaying the UNI Interface Configuration

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

Command

Purpose

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

Shows the ATM interface configuration.

Example

The following example shows the ATM interface 0/1/0 UNI configuration:
Switch(HB-1)# show atm interface atm 0/1/0
Interface: ATM0/1/0 Port-type: oc3suniIF Status: UP Admin Status: upAuto-config: disabled AutoCfgState: not applicableIF-Side: Network IF-type: UNIUni-type: private Uni-version: V4.0<information deleted)
Configuring NNI Interfaces

The Network-Network Interface (NNI) specification defines communications between two ATM switches in a private ATM network.

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

Command

Purpose

Step 1

Switch(config)# interface atm card/subcard/port[.vpt#]

Switch(config-if)#

Selects the interface to be configured.

Step 2

Switch(config-if)# no atm auto-configuration

Disables autoconfiguration on the interface.

Step 3

Switch(config-if)# atm nni

Configures the ATM NNI interface.

Example

The following example shows how to configure ATM interface 3/0/0 as an NNI interface:
Switch(HB-1)(config)# interface atm 3/0/0Switch(HB-1)(config-if)# no atm auto-configurationSwitch(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.Switch(HB-1)(config-if)# atm nniSwitch(HB-1)(config-if)#%ATM-5-ATMSOFTSTART: Restarting ATM signalling and ILMI on ATM3/0/0.
Displaying the NNI Interface Configuration

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

Command

Purpose

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

Shows the ATM interface configuration.

Example

The following example shows the configuration of the NNI interface ATM 3/0/0 on the ATM switch router-1 (HB-1) located in the headquarters building:
Switch(HB-1)# show atm interface atm 3/0/0
Interface: ATM3/0/0 Port-type: oc3suniIF Status: UP Admin Status: upAuto-config: disabled AutoCfgState: not applicableIF-Side: Network IF-type: NNIUni-type: not applicable Uni-version: not applicable
<information deleted>
Configuring a 12-Bit VPI NNI Interface (Catalyst 8540 MSR)

The Catalyst 8540 MSR ATM switch router can accommodate up to six interfaces per module for maxvpi-bits greater than the standard 8-bit configuration. If you try to configure more than the maximum number of allowed interfaces with 12-bit virtual path identifiers (VPIs), follow these precautions:

•When you must remove an interface (for example, hot-swapping a port adapter) that is configured for a maxvpi-bit, the number of interfaces (with maxvpi-bit value greater than 8) on the module is decremented. This allows you to then configure other interfaces on the same module for maxvpi-bits greater than eight bits.

•If a port adapter with interfaces configured with a maxvpi-bits value of eight is reinserted into a module location that previously held a port adapter with maxvpi-bits greater than eight bits, the VCs with VPIs greater than 255 remain in "No HW RESOURCES" state. An interface can be reconfigured to maxvpi-bits greater than eight, by changing the value to less than or equal to eight bits on a different interface. The VCs can be restored from "No HW RESOURCES" state by toggling the interface state using the shutdown and no shutdown commands.

When you need a 12-bit VPI range greater than 255, change the maximum VPI bits configuration. Perform the following steps, beginning in global configuration mode:

Command

Purpose

Step 1

Switch(config)# interface atm card/subcard/port

Switch(config-if)#

Selects the interface to be configured.

Step 2

Switch(config-if)# no atm auto-configuration

Disables autoconfiguration on the interface.

Step 3

Switch(config-if)# atm nni

Configures the ATM NNI interface.

Step 4

Switch(config-if)# atm maxvpi-bits max-vpi-bits

Modifies the maximum VPI bits configuration.

Note 12-bit VPI support is only available on ATM NNI interfaces.

Example

The following example shows that if you are unable to configure a port with a maximum 12-bit VPI value greater than 8, you receive a message prompting you to reconfigure the port:
Switch(config)# interface atm 0/0/0Switch(config-if)# no atm auto-configurationSwitch(config-if)# atm nniSwitch(config-if)# atm maxvpi-bits 12
This port can not be configured for vpi bits greater than 8, unless oneof the following ports is reconfigured for 8 bits vpi
interface a11/0/0interface a11/0/1interface a11/0/2interface a11/0/3interface a12/0/0interface a12/0/1
Displaying the 12-Bit VPI NNI Interface Configuration (Catalyst 8540 MSR)

To display the 12-bit VPI NNI interface configuration, use the following EXEC commands:

Command

Purpose

show switch module interface atm card/subcard/port

Displays the maxvpi-bits for the specified ATM interface.

show atm interface atm card/subcard/port

Shows the ATM interface configuration.

Examples

The following example shows the maxvpi-bits for interface ATM 0/0/0:
Switch# show switch module interface atm 0/0/0Module ID Interface Maxvpi-bits State----------------------------------------0 ATM0/0/0 8 UPATM0/0/4 8 DOWNATM0/0/1 8 DOWNATM0/0/5 8 DOWNATM0/0/2 8 UPATM0/0/6 8 DOWNATM0/0/3 8 UPATM0/0/7 8 DOWN========================================

The following example shows how to display the configuration information for interface ATM 0/0/0:

Switch# show atm interface atm 0/0/0
Interface: ATM0/0/0 Port-type: oc3suniIF Status: DOWN Admin Status: downAuto-config: enabled AutoCfgState: waiting for response from peerIF-Side: Network IF-type: UNIUni-type: Private Uni-version: V3.0Max-VPI-bits: 8 Max-VCI-bits: 14Max-VP: 255 Max-VC: 16383ConfMaxSvpcVpi: 100 CurrMaxSvpcVpi: 100ConfMaxSvccVpi: 100 CurrMaxSvccVpi: 100ConfMinSvccVci: 60 CurrMinSvccVci: 60Svc Upc Intent: pass Signalling: EnabledATM Address for Soft VC: 47.0091.8100.0000.0040.0b0a.2a81.4000.0c80.0000.00Configured virtual links:PVCLs SoftVCLs SVCLs TVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Inst-Conns3 0 0 0 0 0 0 3 0Logical ports(VP-tunnels): 0Input cells: 0 Output cells: 05 minute input rate: 0 bits/sec, 0 cells/sec5 minute output rate: 0 bits/sec, 0 cells/secInput AAL5 pkts: 0, Output AAL5 pkts: 0, AAL5 crc errors: 0
Configuring IISP Interfaces

The Interim Interswitch Signalling Protocol (IISP) defines a static routing protocol for use between ATM switches. IISP provides support for switched virtual connections (SVCs) on switches that do not support the Private Network-Network Interface (PNNI) protocol. For further information, refer to "Configuring ATM Routing and PNNI"

To configure an IISP interface, perform the following tasks, beginning in global configuration mode:

Command

Purpose

Step 1

Switch(config)# interface atm card/subcard/port[.vpt#]

Switch(config-if)#

Selects the interface to be configured.

Step 2

Switch(config-if)# no atm auto-configuration

Disables autoconfiguration on the interface.

Step 3

Switch(config-if)# atm iisp [side {network | user}] [version {3.0 | 3.1 | 4.0}]

Configures the ATM IISP interface.

Step 4

Switch(config-if)# exit

Switch(config)#

Exits interface configuration mode.

Step 5

Switch(config)# atm route addr-prefix
atm card/subcard/port[.subinterface#]

Configures the ATM route address prefix.

Example

The following example shows how to configure ATM interface 3/0/0 on the ATM switch router (SB-1) as user side IISP and specifies an ATM route address prefix:
Switch(SB-1)(config)# interface atm 3/0/0Switch(SB-1)(config-if)# no atm auto-configurationSwitch(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.Switch(SB-1)(config-if)# atm iisp side userSwitch(SB-1)(config-if)#%ATM-5-ATMSOFTSTART: Restarting ATM signalling and ILMI on ATM3/0/0.Switch(SB-1)(config-if)# exitSwitch(SB-1)(config)# atm route 47.0091.8100.0000.0000.0ca7.ce01 atm 3/0/0
Displaying the IISP Configuration

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

Command

Purpose

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

Shows the interface configuration.

Example

The following example shows the configuration of ATM interface 3/0/0 on the ATM switch router (SB-1):
Switch(SB-1)# show atm interface atm 3/0/0
Interface: ATM3/0/0 Port-type: oc3suniIF Status: UP Admin Status: upAuto-config: disabled AutoCfgState: not applicableIF-Side: User IF-type: IISPUni-type: not applicable Uni-version: V3.0Max-VPI-bits: 8 Max-VCI-bits: 14Max-VP: 255 Max-VC: 16383ConfMaxSvpcVpi: 255 CurrMaxSvpcVpi: 255ConfMaxSvccVpi: 255 CurrMaxSvccVpi: 255ConfMinSvccVci: 35 CurrMinSvccVci: 35Svc Upc Intent: pass Signalling: EnabledATM Address for Soft VC: 47.0091.8100.0000.00e0.4fac.b401.4000.0c80.8000.00Configured virtual links:PVCLs SoftVCLs SVCLs TVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Inst-Conns3 0 0 0 0 0 0 3 2Logical ports(VP-tunnels): 0Input cells: 264089 Output cells: 2732535 minute input rate: 0 bits/sec, 0 cells/sec5 minute output rate: 0 bits/sec, 0 cells/secInput AAL5 pkts: 172421, Output AAL5 pkts: 176993, AAL5 crc errors: 0

	Command	Purpose
Step 1	Switch(config)# interface atm card/subcard/port[.vpt#] Switch(config-if)#	Selects the interface to be configured.
Step 2	Switch(config-if)# no atm auto-configuration	Disables autoconfiguration on the interface.

	Command	Purpose
Step 1	Switch(config)# interface atm card/subcard/port Switch(config-if)#	Selects the interface to be configured.
Step 2	Switch(config-if)# no atm auto-configuration	Disables autoconfiguration on the interface.
Step 3	Switch(config-if)# atm nni	Configures the ATM NNI interface.
Step 4	Switch(config-if)# atm maxvpi-bits max-vpi-bits	Modifies the maximum VPI bits configuration.

Command	Purpose
show switch module interface atm card/subcard/port	Displays the maxvpi-bits for the specified ATM interface.
show atm interface atm card/subcard/port	Shows the ATM interface configuration.