The delay-restore feature for non-VLT ports is used to delay the bringup of non-VLT ports. There is enough time available for the protocols and features to converge. If there is no such mechanism available, then traffic may be blocked as a result. This feature is similar to VLT delay-restore mechanism for VLT LAGs, which is already supported.
The delay-restore mechanism applies to the following two scenarios:
- VLT peer reload – When the reloaded node joins as a secondary node in the VLT domain. VLT LAGs are brought up only after the delay-restore timer expires.
- VLTi link failure – When the VLT heartbeat is configured and is up and running, if the VLTi link goes down, the secondary VLT peer brings down its local VLT LAGs. All devices connected to the VLT LAG interfaces are expected to send or receive traffic through the VLT primary device. When the VLTi link comes back up, the secondary VLT peer does not immediately bring its VLT LAG up. They are brought up only after VLT delay-restore timer expires, assuming that heartbeat is up.
To configure a delay-restore for orphan ports, use the following commands:
OS10#configure terminal
OS10(config)#interface ethernet 1/1/1
OS10(conf-if-eth1/1/1)vlt delay-restore orphan-port enable
OS10(conf-if-eth1/1/1)exit
OS10(conf)vlt-domain 1
OS10(conf-vlt-1)delay-restore 150