Configuring the OSPF SR-MPLS TE Capability and Topology Report Function

Before an SR-MPLS TE tunnel is established, the OSPF SR-MPLS TE capability and OSPF topology report function must be enabled.

Context

Before an SR-MPLS TE tunnel is established, a device must assign labels, collect network topology information, and report the information to the controller so that the controller uses the information to calculate a path and a label stack for the path. SR-MPLS TE labels can be assigned by the controller or the extended OSPF protocol on forwarders. Network topology information (including labels allocated by OSPF) is collected by OSPF and reported to the controller through BGP-LS.

Procedure

Configure the OSPF SR-MPLS TE capability.
Perform the following steps on each node of an SR-MPLS TE tunnel to be established:
1. Run system-view
  The system view is displayed.
2. Run ospf [ process-id ]
  The OSPF view is displayed.
3. Run opaque-capability enable
  The OSPF Opaque capability is enabled.
4. Run segment-routing mpls
  OSPF SR enabled.
5. Run area area-id
  The OSPF area view is displayed.
6. Run mpls-te enable [ standard-complying ]
  TE is enabled in the OSPF area.
7. Run commit
  The configuration is committed.
8. Run quit
  Return to the system view.
Configure a device to report topology information to the controller.
Perform the following steps on one or more nodes of an SR-MPLS TE tunnel:

A forwarder can report network-wide topology information to the controller after they establish a BGP-LS peer relationship. The following steps can be configured on one or multiple nodes, depending on the network scale.
1. Run ospf [ process-id ]
  The OSPF view is displayed.
2. Run bgp-ls enable
  OSPF is enabled to advertise network topology information to BGP-LS.
3. Run quit
  Return to the system view.
4. Configure the BGP-LS route advertisement capability.
  1. Run bgp { as-number-plain | as-number-dot }
    
    BGP is enabled, and the BGP view is displayed.
  2. Run peer ipv4-address as-number as-number-plain
    
    A BGP peer group is created.
  3. Run link-state-family unicast
    
    BGP-LS is enabled, and the BGP-LS view is displayed.
  4. Run peer { group-name | ipv4-address } enable
    
    The ability to exchange BGP-LS routes with the specified BGP peer is enabled.
5. Run commit
  The configuration is committed.