Cisco Cisco IOS Software Release 12.0(14)S

This example illustrates how to configure an MPLS traffic engineering tunnel with two path options: a 
preferred explicit path with an exclude-address and a backup dynamic path.

First, configure the IP explicit path named “OmitR12” which excludes the router with router ID 
12.12.12.12

router(config)# ip explicit-path name OmitR12

router(cfg-ip-expl-path)# exc

router(cfg-ip-expl-path)# exclude-address 12.12.12.12

Explicit Path name OmitR12:

    1: exclude-address 12.12.12.12

router(cfg-ip-expl-path)# end

To verify the configuration of the explicit path, use the show ip explicit-path command:

router# show ip explicit-paths name OmitR12

PATH OmitR12 (loose source route, path complete, generation 3)

    1: exclude-address 12.12.12.12

router#

The person performing the configuration must know the router IDs for LSRs (nodes) in the 
network; in this example, that 12.12.12.12 is a router ID. Otherwise, it will not be apparent 
whether the specified address is the IP address of a link or a router ID.

Next, configure Tunnel11 with its two options, where the preferred path option is the ip explicit path 
“OmitR2”:

router(config)# interface Tunnel11

router(config-if)# ip unnumbered Loopback0

router(config-if)# tunnel destination 11.11.11.11

router(config-if)# tunnel mode mpls traffic-eng

router(config-if)# tunnel mpls traffic-eng path-option 1 explicit name OmitR12

router(config-if)# tunnel mpls traffic-eng path-option 2 dynamic

There are additional commands for configuring properties for traffic engineering tunnels 
such as bandwidth, priority, and so forth. For descriptions of those commands, refer to the 
MPLS Traffic Engineering and Enhancements manual.

This section documents the exclude-address command. All other commands used with this feature 
are documented in the Cisco IOS Release 12.0 and Release 12.1 command reference publications.