Switch in stack keeps resetting

[DH1]

I have a stack with 5 x450e-48p switches. Back in January I replaced slot 3 due to it failing and all was good after that. A couple weeks ago slot 3 failed again so I replaced the switch and all was good until this past Friday when it started randomly resetting itself. I don't want to replace the switch again as I don't know if that is the issue. Could a bad stacking cable or module cause this? It is running on an older firmware of 12.4.1.7, could that be causing it?

[Yurij]

how was the problem solved?

[Doug]

Solved via GTAC case.

[DH1]

I have upgraded the XOS to the version stated above but slot 3 keeps failing and resetting. It states it lost communication with the master node. Could this be a stacking cable issue or stacking port issue?

Here is a screenshot of the stacking-port utilization. It clearly shows very little traffic on ports 3:2 & 4:1

Link Utilization Averages Fri Oct 13 12:12:03 2017
Port Link Rx Peak Rx Tx Peak Tx
State pkts/sec pkts/sec pkts/sec pkts/sec
================================================================================
1:1 A 395 395 5541 5541
1:2 A 815 1055 5591 5880
2:1 A 5293 6674 685 1132
2:2 A 311 460 5051 5985
3:1 A 5206 5974 379 379
3:2 A 1 4 21 28
4:1 A 21 77 1 43
4:2 A 5028 5267 113 240
5:1 A 113 240 5014 5267
5:2 A 5313 5452 337 390

[Drew_C]

Hi DH,
It might be best for you to open a case with GTAC so the team can dig a little deeper to see what might be happening to your stack.