VSX: Split
The intent here is to showcase a complete inter-switch-link (ISL) link failure scenario where both of the ISL links between spine switches goes down.
The following is a visualization of a disconnected ISL link and how the traffic pattern would look:
The following is expected in this scenario:
- After disconnecting both ISL Links and Keepalive is up and properly configured the VSX Secondary Switch should put all its MCLAGs into lacp-blocked state and traffic should only flow through VSX Primary.
- VSX Primary switch should continue to operate without any problems.
- If traffic was originally flowing through secondary VSX member a small percentage of packets may be dropped when disconnecting the ISL. A sub second value is expected during this event.
- When connecting back ISL link, the hashing needs to be recalculated and some packets may be dropped during this event as well. A sub second value is expected during this event.