Stack Problem after updating IOS on 2960S

[sforster123]

Daer All,

i run a Stack of 4 2960S-24PC-L on IOS 12.2(58)SE2. We changed some stuff, Stackmember 3+4 are not longer needed and i unmount them.

Now i like to use them somewhere else and updated the IOS first to 15.0(2)SE11, then to 15.2(2)E9. Stack is not working with these IOS,

Message:

Unsupported FlexStack module inserted in Switch 0. C2960S-F-STACK

downgrade again to 12.2(58): everything fine.

Message:

Switch 1 is READY

Product Switch: WS-C2960S-24TS-L V04

Stack: C2960S-F-STACK V01

Any Ideas?

BR

Siggi

[Thomas Bille Joergensen]

Hi,

As mentioned in this thread: https://community.cisco.com/t5/switching/ws-c2960s-48fps-l-stack-port-down/td-p/2160299

Perhaps you should try to reseat stacking modules and cables. I understand that it works on version 12.2(58), but still it may be a periodical issue. I would also try and break the stack and see if the error message appears on both switches. Also I would try to erase all configuration, including vlan.dat etc. and attempt the upgrade again when not in stack.

[sforster123]

Hi Thomas,

Thanks for your reply and the link... Slaping Stackmodules, strange kind of fetish...

there is no difference doing the Update with plugged or unplugged Stack modules or -cables. The message is still the same.

BR

Siggi

[cmarva]

are you getting the unsupported module message in 15.0.2-se11, or in 15.2.2-e9? Last year I took a bunch of 2960S stacks directly from 12.2.53 (or 12.2.58) directly to 15.2.2-e8 and I did not have a problem at all with any of them. If you're going to 15.0.2-se11 and you're seeing that message, did you or can you try going directly to 15.2.2-e9?

[sforster123]

Hi,

the message is displayed in both 15.x versions. Stackports stay down. Just 12.2 works.

Of course, i'm able to test the direct update to 15.2, gimme 30minutes...

BR

Siggi

[sforster123]

Nope, same result.

%PLATFORM-6-FLEXSTACK_UNSUPPORTED_MODULE: Unsupported FlexStack module inserted in Switch 0. C2960S-F-STACK

%STACKMGR-4-STACK_LINK_CHANGE: Stack Port 1 Switch 1 has changed to state DOWN

%STACKMGR-4-STACK_LINK_CHANGE: Stack Port 2 Switch 1 has changed to state DOWN

BR

Siggi