Start up configuration erased automatically in cisco 4507R

[Ranjan Singh]

Hi,

I have multiple cisco switches of 4500 series in my environment. In last week one of switch 4507r rebooted and after reload it lost all its configuration. Once i took console,i came to know that there is nothing in start up file. But i could see all vlan informations without ip were exist.Also all ports were part of default vlan1. I m trying to find out how can this possible.. I checked crasinfo...but it shows LAST CRASH NEVER and config register is also set right.

Can you help me to know what can be possible cause of automatic startup config erased in cisco 4507r. I m not getting any proper reason of this issue.

[Leo Laohoo]

What is the config-registry value?

[Ranjan Singh]

Hi Leo,

Configuration register is 0x2102. 

[marce1000]

  - Was this a once-only event, or can you repeat this problem; if it was a once-only event, you may have forgotten to save  a (or the) valid current config before the reboot happened.

M.

[Ranjan Singh]

Hi Marce,

It was a once-only event and this is working since 5 to 6 years and it is rebooted multiple times during this period.All Configuration were saved since long. This really  trouble me as i m unable to find any clue.

[marce1000]

 - Check security access settings for your device, possible implement a ssh/telnet access list from which only managers can connect and or  change the admin password(s) on the switch.

M.

[Ranjan Singh]

Hi Marce,

We have already implemented SSH and given limited access.