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.

  1. Create the MPLS tunnel interface.
    host1(config)#interface tunnel mpls:boston
  2. (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
  3. (Optional) Specify a tunnel metric to be used by an IGP in its SPF calculation.
    host1(config-if)#tunnel mpls autoroute metric absolute 100
  4. (Optional) Configure the path options used for the tunnel.
    host1(config-if)#tunnel mpls path-option 3 dynamic isis
  5. (Optional) Configure the bandwidth required for the tunnel.
    host1(config-if)#tunnel mpls bandwidth 1240
  6. (Optional) Configure preemption hold or setup priority.
    host1(config-if)#tunnel mpls traffic-eng priority 4 4
  7. (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.

  8. (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
  9. (Optional) Associate a text description with the tunnel.
    host1(config-if)#tunnel mpls description southshore
  10. Configure the tunnel endpoint.
    host1(config-if)#tunnel destination 10.12.21.5

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