Hello All,
I migrated a VMware ESXi6 host form Catalyst 3750 stack to Cisco 550X stack.
I create a LAG group on the Cisco 550X stack with ports XG5/7, XG6/7 and LACP disabled. I connected the old connections and it all seamed to work.
I decided to check the fail-over and done the fallowing test:
- Disconnected XG5/7 - No lost of connectivity
- Reconnected XG5/7 - One ping timeout
- Disconnected XG6/7 - No lost of connectivity
- Reconnected XG6/7 - Lost Connectivity
- Disconnected XG6/7- Connectivity is back
- Reconnected XG6/7 - Lost Connectivity
- Disconnected XG5/7 - Connectivity is back
- Reconnected XG5/7 - One ping timeout
- Disconnected XG6/7- No lost of connectivity
- Reconnected XG6/7 - Lost Connectivity
- Disconnected XG5/7 - Connectivity is back
- Reconnected XG5/7 - One ping timeout
So for some strange reason if XG6/7 is down and come back the connection to the host is lost. The only way to have both working again is to disconnect XG5/7 and reconnect it.
Did someone has any idea what this could be ?