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Implementing Frame Mode MPLS

Chapter Description

This chapter covers configuring Cisco Express Forwarding, verifying CEF, troubleshooting CEF, configuring MPLS on a Frame Mode interface, and configuring MTU size in label switching.

Configuring MPLS on a Frame Mode Interface

Router(config)#mpls ip

Enables MPLS globally on the router

NOTE: MPLS is enabled by default on Cisco routers. However, if you need to re-enable it, use the global mpls ip command.

Router(config)#interface fastethernet 0/0

Moves to interface configuration mode

Router(config-if)#mpls ip

Enables MPLS on the specified interface

Router(config-if)#mpls label protocol tdp

Enables Tag Distribution Protocol (TDP) on this interface

NOTE: TDP is Cisco proprietary. LDP is a superset of TDP. Cisco is changing from TDP to a fully compliant LDP.

Router(config-if)#mpls label protocol ldp

Enables Label Distribution Protocol (LDP) on this interface

NOTE: LDP is the default protocol on Cisco IOS Release 12.4(3) and later. In older releases, TDP was the default protocol.

Router(config-if)#mpls label protocol both

Enables both TDP and LDP on this interface

3. Configuring MTU Size in Label Switching | Next Section Previous Section