[c-nsp] 3640 with misbehaving NVRAM

[Daryl G. Jurbala]

I've got a 3640 that decided to stop working when I powerfailed it.

The relevant (I believe) sequence of events was:
-Upgrade IOS from 12.3.11T (deferred) to 12.3.13
-reload
-run successfully for a week or so
-powerfail (moving things in a rack..not related to router performance)
-on powerup, I'm now getting:
Warning: monitor nvram area is corrupt ... Using default values
Environment write to nvram failed

Error in NVRAM sizing.  NVRAM could be bad!


I did some digging, and found that there were some issued with certain
IOS versions trashing the NVRAM with bootstrap 11.1(19)AA (which is what
this router has, with a supposed BOOT-3600 free upgrade available), and
tried many things to correct this (grab a newer bootstrap prom from a
3620, no go....even went as far as to yank the nvram, boot, jam it back
in and try to sync, no go).

This very well may be as simple as failed nvram (any idea where I can
get one of those for equipment that is no longer on contract?.....this
is just lab equipment), but based on some of the things I found, that
may not be it...and replacing the nvram with a new one may only work
until the next powerfail.

Anyone deal with this one before and have some insight?

Thanks in advance,
Daryl G. Jurbala
NGM Tec, Inc.
Tel: 215-862-1160 ext. 235
Fax: 215-862-9880