Configuring OSPFv2 Flex-Algorithm prefix node SID

An IPv4 prefix node SID must be assigned for each participating Flex-Algorithm.

The Flex-Algorithm SIDs are allocated from the label block assigned to SR and configuring a special range for Flex-Algorithms is not required.

Use the following syntax to configure the prefix node SIDs for OSPFv2 Flex-Algorithms:


config>router>ospf>area>interface
                        +--node-sid
                        +--flex-algo flex-algo-id
                           +--node-sid index <[0..4294967295]>
                           +--node-sid label <[1..4294967295]>
                           +--no node-sid

Example: Configuration output for Flex-Algorithm prefix node SIDs


router
  mpls-labels
    sr-labels start 20000 end 30000
  exit
  interface "Loopback0"
    address 10.20.1.2/32
    loopback
    no shutdown
  exit
  ospf 0
    segment-routing
      prefix-sid-range global
      no shutdown
    exit
    area 0.0.0.0
      interface "Loopback0"
        node-sid index 2
        flex-algo 128
          node-sid index 12
          exit
          no shutdown
      exit