Configuring a Route-Policy to Control Label Distribution

You need to configure a route-policy to control label allocation for the inter-AS BGP LSP. If labeled IPv4 routes are advertised to the PE of the local AS, you need to re-allocate the MPLS label to these routes. If routes sent by the PE of the local AS are advertised to the peer ASBR, you need to allocate the MPLS label to these routes.

Context

The MPLS label distribution for IPv4 routes is controlled by the routing policy. Labels are distributed to the routes that satisfy certain requirements.

Perform the following steps on the ASBR.

Procedure

Create a route-policy.
1. Run system-view
  The system view is displayed.
2. Run route-policy policy-name1 permit node seq-number
  A route-policy applied to the local PE is created. For labeled IPv4 routes advertised to PEs in the same AS, the PE reallocates MPLS labels to the routes.
3. Run if-match mpls-label
  IPv4 routes with labels are matched.
4. Run apply mpls-label
  Labels are allocated to IPv4 routes.
5. Run quit
  Return to the system view.
6. Run route-policy policy-name2 permit node seq-number
  The route-policy applied to the peer ASBR is created.
  
  For labeled IPv4 routes advertised to PEs in the same AS, the ASBR re-allocates MPLS labels to the routes.
7. Run apply mpls-label
  The label is allocated to the IPv4 route.
8. Run commit
  The configuration is committed.
Apply the route-policy.
The route-policy applies to the ASBR.
1. Run system-view
  The system view is displayed.
2. Run bgp { as-number-plain | as-number-dot }
  The BGP view is displayed.
3. Run peer ipv4-address route-policy policy-name1 export
  The route-policy adopted when routes are advertised to the local PE is applied.
4. Run peer ipv4-address route-policy policy-name2 export
  The route-policy adopted when the routes are advertised to the peer ASBR is applied.
5. Run commit
  The configuration is committed.