I have a GSM7328Sv2 cascaded with some GS724TS (unstacked) and two tagged VLANs.
The switch works fine, but sometimes it disables itself a cascaded port (almost always the same port), without apparent reason.
When this happens :
- The connection is interrupted
- All other ports continue to operate normally
- LED on the switch is off
- Nothing obvious in logs
- IMPORTANT: when I go Switching> Ports, I see the port with the Admin Mode column blank, while all other ports are Enable
- When I force Admin Mode to Enable, the connection restart normally in a few seconds.
I already changed the cable.
Does anyone have an idea of the cause (a faulty switch, security reasons, storm something?) Does anyone have an idea how to prevent it happening again ?
Currently, the port shutdown almost 1x per day...