14.1.9 Configuring direct link failure detection

Points to note

To allow a GSRP switch in the backup (neighbor unknown) state to take over the master that failed due to a direct-link failure, you can choose whether to perform manual switchover (by entering a command that change the switch state to the master state) or automatic switchover (direct-link failure detection).

If you use direct-link failure detection to perform automatic switchover, we recommend that you configure redundant direct links to decrease the possibility of direct link failures other than those caused by failures on the neighbor switch. As redundant direct links, you can assign an aggregated link or multiple normal links. The effect is the same. When Layer 3 redundancy switching requires a VLAN on direct links to continue communication with the upstream network, use link aggregation to assign the redundant direct links.

Command examples

1. (config)# gsrp 1

   Switches to GSRP configuration mode.

2. (config-gsrp)# no-neighbor-to-master direct-down

   Configure direct-link failure detection to automatically change the backup switch state to the master state when a direct-link failure occurs.