Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

cat2960-S randomly rebooting

My cisco cat 2960-S keeps on rebooting.

can anyone help how to troubleshoot/ or what is the possible cause of this?


Hall of Fame Super Gold

cat2960-S randomly rebooting

Post the output to the following commands:

1.  sh version; and

2.  sh post

New Member

cat2960-S randomly rebooting

Hi Leo,

and I think its config is change because I cant connect to its redundant sw. But Im sure I did save the config. Is it Malfunctioning?

Its been 7+ weeks since the sw is on prod.

FYI this SW is in remote Site ..Far away Site

ECISW001#sh ver

Cisco IOS Software, C2960S Software (C2960S-UNIVERSALK9-M), Version 12.2(55)SE7, RELEASE SOFTWARE (fc1)

Technical Support:

Copyright (c) 1986-2013 by Cisco Systems, Inc.

Compiled Mon 28-Jan-13 10:28 by prod_rel_team

Image text-base: 0x00003000, data-base: 0x01B00000

ROM: Bootstrap program is Alpha board boot loader

BOOTLDR: C2960S Boot Loader (C2960S-HBOOT-M) Version 12.2(55r)SE, RELEASE SOFTWARE (fc1)

ECISW001 uptime is 1 day, 3 minutes

System returned to ROM by power-on

System image file is "flash:/c2960s-universalk9-mz.122-55.SE7/c2960s-universalk9-mz.122-55.SE7.bin"

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

If you require further assistance please contact us by sending email to

cisco WS-C2960S-24TS-L (PowerPC) processor (revision H0) with 131072K bytes of memory.

Processor board ID FOC1720W0XN

Last reset from power-on

2 Virtual Ethernet interfaces

1 FastEthernet interface

28 Gigabit Ethernet interfaces

The password-recovery mechanism is enabled.

512K bytes of flash-simulated non-volatile configuration memory.

Base ethernet MAC Address       : D0:C7:89:DA:30:80

Motherboard assembly number     : 73-11910-09

Power supply part number        : 341-0328-02

Motherboard serial number       : FOC17200AM7

Power supply serial number      : DCA1714M207

Model revision number           : H0

Motherboard revision number     : A0

Model number                    : WS-C2960S-24TS-L

Daughterboard assembly number   : 73-11933-04

Daughterboard serial number     : FOC17192D52

System serial number            : FOC1720W0XN

Top Assembly Part Number        : 800-30954-04

Top Assembly Revision Number    : A0

Version ID                      : V04

CLEI Code Number                : COMGG00ARD

Daughterboard revision number   : A0

Hardware Board Revision Number  : 0x01

Switch Ports Model              SW Version            SW Image                

------ ----- -----              ----------            ----------              

*    1 28    WS-C2960S-24TS-L   12.2(55)SE7           C2960S-UNIVERSALK9-M    

Configuration register is 0xF

ECISW001#sh post

Stored system POST messages:

Switch 1



  FC 1   MBIST Test Passed.

  DP Sg1 MBIST Test Passed.

  DP Xg1 MBIST Test Passed.

  NI 1   MBIST Test Passed.

  FC 0   MBIST Test Passed.

  DP Sg0 MBIST Test Passed.

  DP Xg0 MBIST Test Passed.

  NI 0   MBIST Test Passed.

  UPB    MBIST Test Passed.

POST: MA BIST : End, Status Passed


POST: TCAM BIST : End, Status Passed

POST: Thermal, Fan Tests : Begin

POST: Thermal, Fan Tests : End, Status Passed

POST: PortASIC Stack Port Loopback Tests : Begin

POST: PortASIC Stack Port Loopback Tests : End, Status Passed

POST: PortASIC Port Loopback Tests : Begin

POST: PortASIC Port Loopback Tests : End, Status Passed

POST: EMAC Loopback Tests : Begin

POST: EMAC Loopback Tests : End, Status Passed


New Member

cat2960-S randomly rebooting

another thing the config change is on the trunk port to another sw (specifically from that port only) change from "sw tr allowed vlan 888" to no config.

Hall of Fame Super Gold

Re: cat2960-S randomly rebooting

The output to the command "sh version" shows the switch was powered on.

Have you checked that the power source is stable?

Sent from Cisco Technical Support Nintendo App

New Member

Re: cat2960-S randomly rebooting

Still checking on that.

I used "sh logging onboard summary" and saw that it had been rebooting 39 times with reset reason 0x0. Fyi it has no ntp server so the timestamp is same. Also it has no prob with env temp

What do you think?


cat2960-S randomly rebooting

   Run a "show tech"  thru the output interpreter and see if anything pops up .  That is supposed to be a fairly stable OS version .

New Member

Re: cat2960-S randomly rebooting

What should i expect to see in sh tech to know if it is ok?


cat2960-S randomly rebooting

   It will list out any known issues or possibly bugs with the code if it sees any .

CreatePlease login to create content