Cisco Cisco IOS Software Release 12.0(15)S

This section provides a configuration example for the MPLS TE Forwarding Adjacency feature using an 
IS-IS metric.

The following output shows a tunnel interface, a forwarding adjacency, and an IS-IS metric being 
configured:

Router# configure terminal

Enter configuration commands, one per line.  End with CNTL/Z.

Router(config)# interface tunnel 7

Router(config-if)# tunnel mpls traffic-eng forwarding-adjacency 

Router(config-if)# isis metric 2 level 1

Here is sample output in which a forwarding adjacency has been configured:

Router# show run

Building configuration...

Current configuration :364 bytes

!

interface Tunnel7

 ip unnumbered Loopback0

 no ip directed-broadcast

 tunnel destination 192.168.1.7

 tunnel mode mpls traffic-eng

 tunnel mpls traffic-eng forwarding-adjacency

 tunnel mpls traffic-eng priority 7 7

 tunnel mpls traffic-eng path-option 10 explicit name short

 isis metric 2 level 1

We do not recommend using the tunnel mpls traffic-eng autoroute announce statement in your 
configuration when you are using forwarding adjacency. This is because they both attract traffic 
down a TE tunnel by interfacing with IGP SPF, but at different points in the process.

Router# show mpls traffic-eng forwarding-adjacency

Displays information about traffic engineering tunnels.

Router# show isis area-tag database [level-1] 

[level-2] [l1] [l2] [detail] [lspid]

Displays information about the IS-IS link-state database.