2960x - stack cables connected while switches power on. SFP ports - status unknown
Connected 2960x uplink using SFP ports both stacks and all 4 ports worked good.
Remote tech connected last stack cable between first and last switch, in 2 different 2960x stacks of switches, while switches were powered on. A longer stack cable was needed. 3 of 4 SFP ports did stopped communicating.
One stack SFP stayed up in switch 2, not master. Completed reload - other SPF connected in switch 4/0/52
Second stack no connection on either SFP, remote tech power cycled switches.
After power cycle one SFP worked in Master 1/0/52, other switches SFP ports show "unknown" when inserting SFP.
Configured port 48 on stack with issue and connected second uplink just fine.
Has anyone experienced this with the SFP's?
- GLC-T P/N 30-1410-03
Looking for documentation on reccommending procedure for connecting stack cables while switches should be powered off or not.
Thanks,
Opened Cisco TAC case. the following bug was found.
the two different HBRN's below require 2 different IOS and they cannot be in same stack.
https://tools.cisco.com/bugsearch/bug/CSCur56395
switch#sh ver | s Hardware Board
Hardware Board Revision Number : 0x05
switch#remote command 2 sh ver | s Hardware Board
Switch : 2 :------------ Hardware Board Revision Number : 0x05
switch#remote command 3 sh ver | s Hardware Board
Switch : 3 : ------------ Hardware Board Revision Number : 0x12
switch#remote command 4 sh ver | s Hardware Board
Switch : 4 :------------Hardware Board Revision Number : 0x12
From Cisco.
Developers have recommended to upgrade the IOS version of switches with a Hardware Board revision Number below 0x10 to the release 15.0(2.0).EX5ES. this is the one attached to this email and should be applied to switch 1 and 2.
For switches with a Hardware Board revision Number above 0x10 to the release 152-2.4.E1ES, which I will send you right away. This should be done on switch 3 and 4.
Now, If you load the engineering special, you will need to do a full power-cycle (physically unplug the power and plug it back in for every single switch). A simple ‘reload’ will not resolve this.
The same must be done on Switch-0. For this stack you will only need to load the image attached to this email since all the Hardware Board revision Numbers are lower than 0x10.
done.
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