MPLS Tunnel Configuration Tasks

Complete the following tasks to configure a tunnel interface. Configure the tunnel endpoint last; anything configured after the tunnel endpoint does not take effect until the tunnel is brought up the next time. You can perform all other tasks in any order.

Note: Tunnel configuration tasks are relevant only for traffic engineering networks.

Create the MPLS tunnel interface.


                  
                     host1(config)#interface tunnel mpls:boston

(Optional) Configure the LSP to announce its endpoint to an IGP (sometimes referred to as registering the endpoint).


                  
                     host1(config-if)#tunnel mpls autoroute announce
                           isis

(Optional) Specify a tunnel metric to be used by an IGP in its SPF calculation.


                  
                     host1(config-if)#tunnel mpls autoroute metric
                           absolute 100

(Optional) Configure the path options used for the tunnel.


                  
                     host1(config-if)#tunnel mpls path-option 3
                           dynamic isis

(Optional) Configure the bandwidth required for the tunnel.


                  
                     host1(config-if)#tunnel mpls bandwidth 1240

(Optional) Configure preemption hold or setup priority.


                  
                     host1(config-if)#tunnel mpls traffic-eng priority
                           4 4

(Optional) Configure resource class affinity.


                  
                     host1(config-if)#tunnel mpls traffic-eng affinity
                           0x000C3000 0xFFFFFFFC

This example of a masked affinity matches only links configured with attribute flags from 0x000C3000 to 0x000C3003.

(Optional) Configure retry timer options to apply to a specific tunnel to set up an LSP after a route or setup failure.


                  
                     host1(config-if)#tunnel mpls no-route retries
                           100 
                     
                     host1(config-if)#tunnel mpls no-route retry-time
                           45 
                     
                     host1(config-if)#tunnel mpls retries 250 
                     
                     host1(config-if)#tunnel mpls retry-time 65

(Optional) Associate a text description with the tunnel.


                  
                     host1(config-if)#tunnel mpls description southshore

Configure the tunnel endpoint.


                  
                     host1(config-if)#tunnel destination 10.12.21.5

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