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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.
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:
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.
To disable autoconfiguration on an interface, perform the following steps, beginning in global configuration mode:
| Step | Command | Purpose |
|---|---|---|
| 1 | interface atm card/subcard/port[.vpt#] | Selects the interface to be configured. |
| 2 | no atm auto-configuration | Disables autoconfiguration on the interface. |
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.
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. |
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: 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 ConfMaxSvpcVpi: 255 CurrMaxSvpcVpi: 255 ConfMaxSvccVpi: 255 CurrMaxSvccVpi: 255 ConfMinSvccVci: 35 CurrMinSvccVci: 35 Svc Upc Intent: pass Signalling: Enabled ATM Address for Soft VC: 47.0091.8100.0000.00e0.4fac.b401.4000.0c80.8000.00 Configured virtual links: PVCLs SoftVCLs SVCLs TVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Inst-Conns 4 0 0 0 1 0 0 5 3 Logical ports(VP-tunnels): 0 Input cells: 263250 Output cells: 269783 5 minute input rate: 0 bits/sec, 0 cells/sec 5 minute output rate: 0 bits/sec, 0 cells/sec Input AAL5 pkts: 171880, Output AAL5 pkts: 175134, AAL5 crc errors: 0
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, perform the following steps, beginning in global configuration mode:
| Step | Command | Purpose |
|---|---|---|
| 1 | interface atm card/subcard/port[.vpt#] | Selects the interface to be configured. |
| 2 | no atm auto-configuration | Disables autoconfiguration on the interface. |
| 3 | atm uni [side {network | user}] | Configures the ATM UNI interface. |
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 0/1/0 Switch(HB-1)(config-if)# no atm auto-configuration Switch(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 4.0 Switch(HB-1)(config-if)# %ATM-5-ATMSOFTSTART: Restarting ATM signalling and ILMI on ATM0/1/0.
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. |
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: oc3suni IF Status: UP Admin Status: up Auto-config: disabled AutoCfgState: not applicable IF-Side: Network IF-type: UNI
Uni-type: private Uni-version: V4.0 <information deleted)
The Network-to-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:
| Step | Command | Purpose |
|---|---|---|
| 1 | interface atm card/subcard/port[.vpt#] | Selects the interface to be configured. |
| 2 | no atm auto-configuration | Disables autoconfiguration on the interface. |
| 3 | Configures the ATM NNI interface. |
The following example shows how to configure ATM interface 3/0/0 as an NNI interface:
Switch(HB-1)(config)# interface atm 3/0/0 Switch(HB-1)(config-if)# no atm auto-configuration Switch(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 nni Switch(HB-1)(config-if)# %ATM-5-ATMSOFTSTART: Restarting ATM signalling and ILMI on ATM3/0/0.
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. |
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: 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 <information deleted>
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 VPIs, follow these precautions:
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:
| Step | Command | Purpose |
|---|---|---|
| 1 | interface atm card/subcard/port | Selects the interface to be configured. |
| 2 | no atm auto-configuration | Disables autoconfiguration on the interface. |
| 3 | Configures the ATM NNI interface. | |
| 4 | atm maxvpi-bits max-vpi-bits | Modifies the maximum VPI bits configuration. |
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 0/0/0 Switch(config-if)# no atm auto-configuration Switch(config-if)# atm nni Switch(config-if)# atm maxvpi-bits 12 This port can not be configured for vpi bits greater than 8, unless one of the following ports is reconfigured for 8 bits vpi interface a11/0/0 interface a11/0/1 interface a11/0/2 interface a11/0/3 interface a12/0/0 interface a12/0/1
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. |
The following example shows the maxvpi-bits for interface ATM 0/0/0:
Switch# show switch module interface atm 0/0/0
Module ID Interface Maxvpi-bits State
----------------------------------------
0 ATM0/0/0 8 UP
ATM0/0/4 8 DOWN
ATM0/0/1 8 DOWN
ATM0/0/5 8 DOWN
ATM0/0/2 8 UP
ATM0/0/6 8 DOWN
ATM0/0/3 8 UP
ATM0/0/7 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: 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 Interim Interswitch Signalling Protocol (IISP) defines a static routing protocol for use between ATM switches. IISP provides support for switched virtual circuits (SVCs) on switches that do not support the Private Network-to-Network Interface (PNNI) protocol. For further information, see the chapter "Configuring ATM Routing and PNNI."
To configure an IISP interface, perform the following tasks, beginning in global configuration mode:
| Step | Command | Purpose |
|---|---|---|
| 1 | interface atm card/subcard/port[.vpt#] | Selects the interface to be configured. |
| 2 | no atm auto-configuration | Disables autoconfiguration on the interface. |
| 3 | atm iisp [side {network | user}] | Configures the ATM IISP interface. |
| 4 | exit | Exits interface configuration mode. |
| 5 | atm route addr-prefix atm card/subcard/port[.subinterface#] | Configures the ATM route address prefix. |
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 3/0/0 Switch(SB-1)(config-if)# no atm auto-configuration Switch(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 user Switch(SB-1)(config-if)# %ATM-5-ATMSOFTSTART: Restarting ATM signalling and ILMI on ATM3/0/0. Switch(SB-1)(config-if)# exit Switch(SB-1)(config)# atm route 47.0091.8100.0000.0000.0ca7.ce01 atm 3/0/0
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. |
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: oc3suni IF Status: UP Admin Status: up 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 ConfMaxSvpcVpi: 255 CurrMaxSvpcVpi: 255 ConfMaxSvccVpi: 255 CurrMaxSvccVpi: 255 ConfMinSvccVci: 35 CurrMinSvccVci: 35 Svc Upc Intent: pass Signalling: Enabled ATM Address for Soft VC: 47.0091.8100.0000.00e0.4fac.b401.4000.0c80.8000.00 Configured virtual links: PVCLs SoftVCLs SVCLs TVCLs PVPLs SoftVPLs SVPLs Total-Cfgd Inst-Conns 3 0 0 0 0 0 0 3 2 Logical ports(VP-tunnels): 0 Input cells: 264089 Output cells: 273253 5 minute input rate: 0 bits/sec, 0 cells/sec 5 minute output rate: 0 bits/sec, 0 cells/sec Input AAL5 pkts: 172421, Output AAL5 pkts: 176993, AAL5 crc errors: 0
Posted: Mon May 8 18:20:30 PDT 2000
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