My 2960 goes out after 12 hours

Unanswered Question
Dec 9th, 2007

I put in a new 2960 it went out after 12 hours, I put in another new 2960, it went out after 12 hours, I power cycled it, then about 12 hours later it went out again.

What could be causing this?

I have this problem too.
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ccbootcamp Sun, 12/09/2007 - 09:54

When you say it "went out" what exactly do you mean? Did the switch reboot? Is the power gone? Does it respond to pings? Are all of the lights off on the box? Can you be more specific? What other devices is it connected to?


(please rate the post if this helps!)

alibashivan Sun, 12/09/2007 - 10:27

Connect a console to the switch, can you access the switch through console? check the device uptime in 'show version' and reboot cause. Check the logs using 'show logging'.

abefroman99 Sun, 12/09/2007 - 10:44

Thanks for your assistance, here is the info:


Copyright (c) 1986-2007 by Cisco Systems, Inc.

Compiled Thu 22-Feb-07 13:57 by myl

Image text-base: 0x00003000, data-base: 0x00AA3380

ROM: Bootstrap program is C2960 boot loader

BOOTLDR: C2960 Boot Loader (C2960-HBOOT-M) Version 12.2(25r)SEE1, RELEASE


RE (fc1)

switch03 uptime is 12 minutes

System returned to ROM by power-on

System image file is "flash:c2960-lanbase-mz.122-25.SEE3/c2960-lanbas


cisco WS-C2960-24TT-L (PowerPC405) processor (revision D0) with

61440K/4088K byt

es of memory.

Processor board ID FOC1128ZAVS

Last reset from power-on

1 Virtual Ethernet interface

24 FastEthernet interfaces

2 Gigabit Ethernet interfaces

The password-recovery mechanism is enabled.

64K bytes of flash-simulated non-volatile configuration memory.

Base ethernet MAC Address : 00:1C:F9:7D:A5:00

Motherboard assembly number : 73-10390-04

Power supply part number : 341-0097-02

Model revision number : D0

Motherboard revision number : A0

Model number : WS-C2960-24TT-L

Top Assembly Part Number : 800-27221-03

Top Assembly Revision Number : A0

Version ID : V03

CLEI Code Number : COM3L00BRB

Hardware Board Revision Number : 0x01

Switch Ports Model SW Version SW Image

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

* 1 26 WS-C2960-24TT-L 12.2(25)SEE3 C2960-LANBASE-M

Configuration register is 0xF

switch03#show logging

Syslog logging: enabled (0 messages dropped, 1 messages rate-limited, 0


0 overruns, xml disabled, filtering disabled)

Console logging: level debugging, 4 messages logged, xml disabled,

filtering disabled

Monitor logging: level debugging, 0 messages logged, xml disabled,

filtering disabled

Buffer logging: level debugging, 4 messages logged, xml disabled,

filtering disabled

Exception Logging: size (4096 bytes)

Count and timestamp logging messages: disabled

File logging: disabled

Trap logging: level informational, 7 message lines logged

Log Buffer (4096 bytes):

00:00:39: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed

state t

o down

00:00:39: %SPANTREE-5-EXTENDED_SYSID: Extended SysId enabled for type vlan

00:00:41: %SYS-5-CONFIG_I: Configured from memory by console

00:00:41: %SYS-5-RESTART: System restarted --

Cisco IOS Software, C2960 Software (C2960-LANBASE-M), Version

12.2(25)SEE3, RELE


Copyright (c) 1986-2007 by Cisco Systems, Inc.

Compiled Thu 22-Feb-07 13:57 by myl


abefroman99 Sun, 12/09/2007 - 11:33

Nothing now, I pull it off the rack because it keeps going down, I had a crossover coming from another switch, and a numbers of servers were connected to it.

I replaced that switch with a 2950 and its working ok, but I need the gigabit port for the crossover that comes from the other switch is isnt available on the 2950.

ccbootcamp Mon, 12/10/2007 - 08:23

If you said this was happening with one switch, I would say, "could be." But you said this is happening with another new 2960 as well!?!?!?

Do you have a 2950 or 2960? You've mentioned both types of switches.

Please answer my questions I am asking you. It will help to provide an accurate answer.

What other devices is it connected to?

do a

show cdp neig de

show run

sh ip int brie


(please rate the post if this helps!)

abefroman99 Mon, 12/10/2007 - 08:32

It was 2 2960's, i have a 2950 on the rack now and that one does not fail.

Are the 2960's more prone to overheating or anything?

Michael Odom Mon, 12/10/2007 - 08:52

Do you have a UPS that the 2960 was plugged into. I have seen issues with autoranging power supplies and inexpensive stepped wave power supplies in other applications. If it is happening at regular intervals, could it be happening with the UPS self test?

It is possible that the 2950's power supply is not as sensitive as the 2960's, and that might explain why you see the problem with muliple 2960's, but not the 2950.

From your show version, it would appear that the switch is returning due to a power fault, and from your descriptions I would suspect something in your power configuration that may be the culprit. If you are not running a UPS, I'd recommend investigating the power in that rack.

abefroman99 Mon, 12/10/2007 - 08:58

I'm not running a UPS in that rack, I will try the switch in a different rack with a different power circuit.


abefroman99 Mon, 12/10/2007 - 09:05

Question, the datacenter has a UPS, do you recommend a small UPS in the rack for the switch?


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