Cisco 2960X stack issues

[SCOTT FARRAND]

I need some help in troubleshooting a stack of 2960X switches.  I should mention that this gear is fairly new - eg new within the past 2 months.

I have a stack of 5 2960X's...

Switch Ports Model              SW Version            SW Image
------ ----- -----              ----------            ----------
     1 52    WS-C2960X-48LPD-L  15.0(2a)EX5           C2960X-UNIVERSALK9-M
     2 52    WS-C2960X-48LPS-L  15.0(2a)EX5           C2960X-UNIVERSALK9-M
     3 52    WS-C2960X-48LPS-L  15.0(2a)EX5           C2960X-UNIVERSALK9-M
*    4 52    WS-C2960X-48LPS-L  15.0(2a)EX5           C2960X-UNIVERSALK9-M
     5 52    WS-C2960X-48LPS-L  15.0(2a)EX5           C2960X-UNIVERSALK9-M

Last Tuesday switch #2 In the past 2 weeks, switch #2 stopped passing traffic properly - I restarted the switch without restarting the full stack, and the issue remained.  Because it was mid day, I pushed off restarting the stack until ~ 6pm and the issue seemed to show up later on another switch in the stack.

Yesterday, switch #1 (of course the unit with "redundant" 10GB up-links) spontaneously rebooted.

I'm more than a little concerned, but am uncertain how to proceed to troubleshoot...  the up-links are dual 1M twinax cables in a port channel connected to a 4500.  Is 15.0(2a)EX5 still the current "best" os load for these switches? 

Switch/Stack Mac Address : b07d.47cd.b980
                                                                  H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
 1       Member f078.16bf.3b80     14     4       Ready
 2       Member b07d.47d6.bc00     1      4       Ready
 3       Member b07d.47d6.6380     1      4       Ready
*4       Master b07d.47cd.b980       1      4       Ready
 5       Member b07d.47d4.a000     1      4       Ready

         Stack Port Status             Neighbors
Switch#  Port 1     Port 2           Port 1   Port 2
--------------------------------------------------------
  1        Ok         Ok                3        2
  2        Ok         Ok                1        4
  3        Ok         Ok                5        1
  4        Ok         Ok                2        5
  5        Ok         Ok                4        3

[julijime · Accepted solution]

Hi Scott,

Regarding your question, the more stable release for your 2960X platform currently is 15.2.2E3:

https://software.cisco.com/download/release.html?mdfid=284795754&flowid=43252&softwareid=280805680&release=15.2.2E3&relind=AVAILABLE&rellifecycle=MD&reltype=latest

HTH 

Julio

[SCOTT FARRAND]

I'll give that a try...

Any other things I should check related to the stack behavior? or do you think this could just be OS related?

[SCOTT FARRAND]

Upgrading from 15.0(2a)EX5 to 15.2(2)E3 seems to have resolved not only the stack behavior issue's as well as the traffic pattern issue's.