Mpls Processing - Cisco Catalyst 8540 MSR Configuration Manual

Configuring Label Edge Routing

MPLS Processing

To configure LER with the enhanced ATM router module acting as MPLS edge proxy, perform the
following steps:
Command
Step 1
Switch(config)# interface atm card/subcard/port
Switch(config-if)#
Step 2 Switch(config-if)# mpls ip
Step 3 Switch(config-if)# mpls-forwarding interface
atm card/subcard/port
You must enable MPLS on the ATM interface by using the mpls ip command.
Note
Once MPLS is enabled on an ATM interface and the interface is linked to the enhanced ATM router
Note
module, all head-end, control, and tail-end VCs through that ATM interface terminate on the Enhanced
ATM router module. All MPLS or IP packet processing is performed on the linked Enhanced ATM router
module.
If you attempt to link an already linked ATM interface to another enhanced ATM router module
Note
interface, an error message similar to the following results: ATM <x/x/x> is already
functioning as mpls edge for ATM <y/y/y>.
If you attempt to unlink an ATM interface that is not linked, an error message similar to the following
Note
results: ATM <x/x/x> is not linked to ATM <y/y/y>.
Example
The following example shows how to link an ATM interface to an enhanced ATM router module
interface for LER MPLS functionality:
Switch# configure terminal
8540-ATM-PE1(conf)# interface atm 3/0/0
8540-ATM-PE1(conf-if)# mpls ip
8540-ATM-PE1(conf-if)# mpls-forwarding interface atm 10/0/1
ATM Switch Router Software Configuration Guide
16-30
Chapter 16 Configuring Tag Switching and MPLS
Purpose
Selects the interface to be configured.
Enables MPLS on the ATM interface.
Links the specified ATM interface to the
enhanced ATM router module interface, which
acts as an MPLS edge proxy.
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