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Global checksum failed? What does this mean?

I ran a show version and I see "Global checksum failed", What does this mean? and how can I fix?

Here is the command output.

Switch> (enable) show ver

WS-C4006 Software, Version NmpSW: 5.4(2)

Copyright (c) 1995-2000 by Cisco Systems, Inc.

NMP S/W compiled on Apr 7 2000, 17:05:03

GSP S/W compiled on Apr 07 2000, 15:17:58

System Bootstrap Version: 5.4(1)

Hardware Version: 3.1 Model: WS-C4006 Serial #: JAB050400VS

Mod Port Model Serial # Versions

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

1 2 WS-X4013 JAB050400VS Hw : 3.1

Gsp: 5.4(2.0)

Nmp: 5.4(2)

2 48 WS-X4148-RJ JAE0440016N Hw : 2.3

3 48 WS-X4148-RJ JAE044001F2 Hw : 2.3

4 48 WS-X4148-RJ JAE044001FC Hw : 2.3

5 48 WS-X4148-RJ JAE061502ZH Hw : 3.0

DRAM FLASH NVRAM

Module Total Used Free Total Used Free Total Used Free

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

1 65536K 30387K 35149K 16384K 4468K 11916K 480K 159K 321K

Global checksum failed.

Switch> (enable)

Thanks,

Mike

  • Other Network Infrastructure Subjects
6 REPLIES

Re: Global checksum failed? What does this mean?

Mike,

be carefull, you can lose a part or complete switch config after next switch reload!!!

This happend to me a year ago.

Do a config backup immediately!!!

See bug CSCdx87646 for details.

Regards,

Milan

Re: Global checksum failed? What does this mean?

Thank you. We have a backup of the config, I keep the backups ready for just this type of problem. What should we look at? I am thinking we replace the Memory....or should we be looking at something else?

Thanks,

Mike

Re: Global checksum failed? What does this mean?

Hi,

I would reload the switch first.

The problem will probably disapear. In my case it was not a HW problem, it even was not reproducible.

Then I would upgrade to some newer CatOS. I remember two cases of this problem - one with CatOS 5, one with after CatOS upgrade (I can't remeber if to CatOS 6 or to CatOS 7).

Since I'm running CatOS 7 I didn't notice it. But I'm not sure it's only CatOS problem, because I'm not able to reproduce it, it just "sometimes happens".

Regards,

Milan

New Member

Re: Global checksum failed? What does this mean?

The flash image is corrupted. At a minimum you need to reload it. You can try that without rebooting. Worst case you need new flash and need to load image on it.

Re: Global checksum failed? What does this mean?

Thank you for your help. I think we will be doing that.

Mike

Re: Global checksum failed? What does this mean?

Thank you for you help. I think we will reload and go from there.

Mike

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