Prerequisites
Before assigning adjacency SIDs, execute the display mpls label command to display the usage status of the labels that you want to assign as adjacency SIDs. Make sure the labels are in
Idle state.
A label that is not in Idle state is being used by another protocol. If you assign it to a link as an adjacency SID, the adjacency SID is not available even if the status of the label changes to Idle later.
To use the adjacency SID, you must remove the adjacency SID assignment and assign the adjacency SID again.
Assigning adjacency SIDs to IS-IS adjacencies
1. Enter system view. system-view
2. Enter interface view.
interface interface-type interface-number
3. Assign an adjacency SID to an IS-IS adjacency. isis adjacency-sid { absolute absolute-value | index index-value }
[ nexthop nexthop-address ]
By default, an IS-IS adjacency does not have an adjacency SID.
Assigning adjacency SIDs to OSPF adjacencies
1. Enter system view. system-view
2. Enter interface view.
interface interface-type interface-number
3. Assign an adjacency SID to an OSPF adjacency. ospf adjacency-sid { absolute absolute-value | index index-value }
[ nexthop nexthop-address ]
By default, an OSPF adjacency does not have an adjacency SID.
4. (Optional.) Set the load balancing weight for an OSPF adjacency. ospf adjacency-sid weight weight-value
By default, the load balancing weight for an OSPF adjacency is not set.
Configuring BGP-based SID advertisement
BGP-based SID advertisement tasks at a glance
Perform the following tasks on each node along an SRLSP:
1.
Configuring BGP to support SR-MPLS
2.
Configuring BGP prefix SIDs
Prerequisites for configuring BGP-based SID advertisement
Before you configure BGP-based SID advertisement, perform the following tasks:
•
Determine the ingress node, transit nodes, and egress node of an SRLSP.
•
Determine the index value for the prefix SID of each node:
•
Enable MPLS on all nodes and interfaces that will participate in MPLS forwarding. For information about enabling MPLS, see basic MPLS configuration in MPLS Configuration Guide .
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