MS150 stack random uplink drop
Hey folks,
I'm looking for some insight on an issue we're troubleshooting.
We have a stack of five MS150 switches connected to an MS225 core switch. On a random day at around 3:03 PM, the entire stack went down and lost communication with the core.
The odd part is that the core switch reported a Layer 1 UDLD error, indicating the fiber could transmit but not receive data. We checked the fiber and SFPs, and everything appeared to be fine. We're using Cisco SFP+ modules.
On July 18, we upgraded the stack to MS18.1.8. The incident occurred on the 29 july, we collected the console logs and sent them to support. So far, the only explanation we've received is that there may have been a synchronization issue within the switch stack.
We also performed a remote reboot of the stack, which reproduced the same issue. We collected another set of logs and provided those as well. Support has since suggested waiting for a newer firmware release, but we haven't received a definitive root cause.
Has anyone experienced something similar with an MS150 stack or MS225 core? Any recommendations on what else to check?
For reference:
No switching loops detected.
We do see some MAC flapping, but it's related to APs and wireless client roaming, and nothing that should bring down an entire switch stack.
Fiber and transceivers appear healthy on inspection.
I'd appreciate any suggestions or ideas on what to investigate next.