Configuring OSPFv2 Flex-Algorithm participation

Up to seven flexible algorithms in the range 128 to 255 can be configured for OSPFv2. Use the participate command to configure a router to participate in the specific algorithm. If a locally configured FAD exists, use the advertise command to advertise the definition. A router is not required to advertise a configured FAD to participate in a Flex-Algorithm.

If a router with Flex-Algorithms is enabled to participate and enabled to advertise the FAD, the Flex-Algorithms are configured and active for all configured OSPFv2 areas, and the FAD is advertised in all OSPFv2 areas.

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


config>router>ospf
              +--flexible-algorithms
                 +--[no] flex-algo flex-algo-id
                    +--advertise fad-name
                    +--no advertise
                    +-- [no] loopfree-alternates
                    +-- [no] participate
                 +-- [no] shutdown

Note: When a router participates in Flex-Algorithms, it only advertises support for the Flex-Algorithm where the router can comply with the winning FAD, provided that at least one FAD exists for this algorithm.

Example: Configuration output for Flex-Algorithm participation


ospf 0
  flexible-algorithms
    flex-algo 128
    advertise "My128"
    participate
  exit
  no shutdown
exit