Chapter 4 Configuring Interfaces

Configuring the ATM Uplink Interface (Catalyst 8540)

To create a PVC, perform the following steps, beginning in global configuration mode:

 

Command

Purpose

Step 1

 

 

Router(config)# interface atm

Enters interface configuration mode and specifies the ATM

 

slot/subslot/interface

interface to configure.

 

Router(config-if)#

 

Step 2

 

 

Router(config-if)# atm pvc vcd

Configures the PVC with VCD value associated with a VPI/VCI

 

vpi vci aal-encap

pair and specifies an encapsulation type.

 

 

 

The atm pvc command allows you to specify additional optional parameters for the connection, including peak, average, and burst transmission rate, and the frequency for generating OAM cells.

Mapping a Protocol Address to a PVC

Cisco IOS supports a mapping scheme that allows you to associate a protocol address with a VCD (for PVCs) or with an ATM NSAP address (for SVCs). To create a mapping, you first create a map list, then associate the map list to an interface.

To map a protocol address to a PVC, perform the following steps, beginning in global configuration mode:

 

Command

Purpose

Step 1

 

 

Router(config)# map-listname

Creates a map list and assigns it a name.

Step 2

 

 

Router(config-map-list)# ip

Creates one or more map list entries, associating a protocol

 

ip-address atm-vcvcd

address with a VCD.

Step 3

 

 

Router(config-map-list)# exit

Exits map-list configuration mode.

 

Router(config)#

 

Step 4

 

 

Router(config)# interface atm

Enters interface configuration mode and specifies the ATM

 

slot/subslot/interface

interface to configure.

 

Router(config-if)#

 

Step 5

 

 

Router(config-if)#map-group

Associates the map list with the interface.

 

name

 

 

 

 

You can create multiple map lists. An interface can have only one map list associated with it, but a map list can be associated with multiple interfaces.

PVC Example

In the following example, PVC 5 is created on ATM interface 1/0/0 by means of LLC/sNAP encapsulation over AAL5. ATM interface 1/0/0 (IP address 1.1.1.1) connects with the ATM interface (IP address 1.1.1.5) at the other end over VC 5.

Router(config)# interface atm 1/0/0

Router(config-if)#ip address 1.1.1.1 255.255.255.0

Router(config-if)#atm pvc 5 0 10 aal5snap

Router(config-if)# map-group atm

Router(config-if)# exit

Router(config)# map-list atm

Router(config-map-list)#1.1.1.5 atm-vc 5 broadcast

 

 

Layer 3 Switching Software Feature and Configuration Guide

 

 

 

 

 

 

 

78-6235-04, Cisco IOS Release 12.0(10)W5(18)

 

 

4-35

 

 

 

 

 

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Cisco Systems 8510 CSR, 8540 CSR Mapping a Protocol Address to a PVC, Vpi vci aal-encap, Ip-address atm-vc vcd, Name