03-09-2018 08:45 AM - edited 03-08-2019 02:12 PM
Hi All,
Anybody experience this issue before?
Switch model: WS-C2960S-48FPD-L
Mix stack with 2960-X
We upgrade the IOS software from C2960S-UNIVERSALK9-M), Version 15.2(2)E6 to version C2960S-UNIVERSALK9-M), Version 15.2(2)E7
After reboot, the switch keep on rebooting with a traceback message.
21:06:19 MAL Fri Mar 9 2018: Unexpected exception to CPUvector 2000, PC = 235615C
-Traceback= 0x235615Cz 0x16A92A8z 0x16DD360z 0x169D90Cz 0x21A936Cz 0x21A56ECz
we tried re-seat the stack module, unplug and plug the Stack cable, non successful.
Finally, we take out the stack module and reboot back to the previous IOS version.
Anybody faced this issue before? I saw other discussion regarding the stack issue, most of it is on older version of IOS image. I would imagine the issue should be solved in the newer IOS version.
Switch details:
Motherboard assembly number : 73-12561-09
Power supply part number : 341-0382-02
Motherboard serial number : FOC16515W5H
Power supply serial number : DCA1638V3CV
Model revision number : E0
Motherboard revision number : A0
Model number : WS-C2960S-48FPD-L
Daughterboard assembly number : 73-11933-04
Daughterboard serial number : FOCXXXXXX
System serial number : FOCXXXXXX
Top Assembly Part Number : 800-32643-03
Top Assembly Revision Number : A0
Version ID : V03
CLEI Code Number : COMGH00ARC
Daughterboard revision number : A0
Hardware Board Revision Number : 0x01
Solved! Go to Solution.
04-26-2018 12:05 PM - edited 04-26-2018 12:07 PM
We opened a TAC case, seems linked to the bug CSCvf46629. This is a VTP issue, the switch must not be configured in VTP Mode Client at boot. Changing the switch to VTP Mode Transparent at boot and set VTP Mode Client after the boot will solve the issue.
The case is not accurate on which version is solving the problem. Someone can test? I've no more similar devices to try.
@Leo Laohoo can you confirm that you're using Transparent?
03-09-2018 08:55 AM
Hi,
Traceback messages are usually an indication of a software crash. If you can't stop the reload by pressing the mode button, I recommend you open a ticket with TAC and have them look at it.
https://www.cisco.com/c/en/us/support/docs/switches/catalyst-2950-series-switches/41845-192.html
HTH
03-11-2018 05:45 PM
04-19-2018 06:53 AM
Hi Anuar
Did you ever find resolution to this issue? We attempted to upgrade out CISCO 2960s stack to 152-2.E7 and experienced the same non-stop reloading. We had to revert back to the original 15.0(2a)SE9 to get the stack working again.
Do you have any recommendations?
Thanks,
Richard
04-19-2018 01:21 PM
04-19-2018 05:53 PM
Hi Richard,
Unfortunately, the only solution was we revert back to E6. Does your stack showing any traceback after the boot?
No issue with our 2960-X running on E7.
03-09-2018 02:44 PM
04-18-2018 02:52 AM - edited 04-18-2018 02:52 AM
Same issue here with 15.2.2 E8, reverting to E6 solved the issue.
04-19-2018 09:29 PM
Yeah, the ony solution was revert back to E6
04-26-2018 12:05 PM - edited 04-26-2018 12:07 PM
We opened a TAC case, seems linked to the bug CSCvf46629. This is a VTP issue, the switch must not be configured in VTP Mode Client at boot. Changing the switch to VTP Mode Transparent at boot and set VTP Mode Client after the boot will solve the issue.
The case is not accurate on which version is solving the problem. Someone can test? I've no more similar devices to try.
@Leo Laohoo can you confirm that you're using Transparent?
04-26-2018 05:21 PM
We are running on client mode for all our access switch. Let me give it a try during our MW.
04-27-2018 08:12 AM
Thanks! I would be very interested in your findings!
Have a good day!
05-20-2018 10:42 PM
08-27-2018 05:20 AM
For information, the client mode isn't working after a reboot. You need to keep the Transparent mode if you need to reboot or upgrade again.
07-18-2019 11:26 PM
We tested the latest release E9 and the problem is definitively solved. Moving from E6 to E9 is working perfectly keeping the VTP in client mode.
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