trigger-up-delay

Service modules can be associated with a route monitoring group to trigger link switchovers, which takes some time.

• A route monitoring group monitors the status of its member routes. If a route in the group goes Down, its down-weight is added to the down-weight sum of the route monitoring group. If the down-weight sum of the route monitoring group reaches the switchover threshold of a service module, the RM module instructs the service module to switch services from the primary link to the backup link.
• If a route in the route monitoring group goes Up again, its down-weight is subtracted from the down-weight sum of the route monitoring group. If the down-weight sum of the route monitoring group falls below the threshold of a service module, the RM module instructs the service module to switch services back.
  If a route in a route monitoring group goes Up, the RM module delivers this route to the forwarding table and establishes a forwarding entry for it, which takes some time. Packet loss may occur if the RM module instructs the service module to perform a link switchback immediately when the down-weight sum of the route monitoring group falls below the switchover threshold of the service module. To address this issue, run the trigger-up-delay command to configure a delay for the RM module to instruct the service module to perform a link switchback.