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NVRAM config error message

Hello guys,

I'm seeing this message when i do a show log on 3 of 5 2950 switches.

%SYS-4-CONFIG_NV_OVERRUN: Non config data present at the end of nvram is corrupted

I was wondering if there is something i should be concerned with?

I also checked the startup config and it looks fine according to company policies.

The version is: Version 12.1(13)EA1b, RELEASE SOFTWARE (fc1)

All 5 switches has the same IOS versions.



Cisco Employee

Re: NVRAM config error message

Hi Kim,

Here is the description of the message you saw in the logs:

%SYS-4-CONFIG_NV_OVERRUN: Non config data present at the end of nvram is corrupted

The software detected that the configuration saved into NVRAM has overlaid a part of the NVRAM occupied by nonconfiguration data files. Typically these files are used by SNMP to store and retrieve nonconfiguration persistent data acro ss system reload.

Recommended Action: Compress the configuration and store or copy to Flash memory, as appropriate.

To compress startup configuration files, use the 'service compress-config' global configuration command. To disable compression, use the no form of this command.



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Community Member

Re: NVRAM config error message

Hi I have the same problem, but not working when do service compress-config as following, would you help to comment? and is it this IOS bug that we need upgrade/ downgrade, currently "flash:/c2950-i6q4l2-mz.121-19.EA1c.bin" thanks.


WLL-SW01(config)#service compress-config

Boot ROMs do not support NVRAM compression.

Disabling service compress-config.






Re: NVRAM config error message

Might try upgradeing to the latest code . Also if you are not using the browser management function you can safely delete the html directory out of nvram and this will free up a fair amount of space.

Community Member

Re: NVRAM config error message

Hi Glen,
The free memory of router is more than the configuration file?
AKL-SW02#sh run
Building configuration...
Current configuration : 4398 bytes

Directory of flash:/

2 -rwx 2980731 Mar 01 1993 00:03:26 c2950-i6q4l2-mz.121-19.EA1c.bin
3 -rwx 269 Jan 01 1970 00:01:38 env_vars
5 -rwx 4398 Aug 17 2017 23:31:08 config.text
6 -rwx 47 Aug 17 2017 23:31:08 private-config.text
7 -rwx 110 Mar 01 1993 00:01:47 info
8 drwx 2432 Mar 01 1993 00:05:05 html
85 -rwx 110 Mar 01 1993 00:05:08 info.ver

7741440 bytes total (1755648 bytes free)
AKL-SW02#dir nvram:
Directory of nvram:/

26 -rw- 4398 <no date> startup-config
27 ---- 47 <no date> private-config

32768 bytes total (24175 bytes free)

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