[c-nsp] 7206 NVRAM issue

[Jay Hennigan]

On 12/26/12 2:09 PM, Joseph Mays wrote:
> Got a used 7206 I am trying to bring back to life. It seems to be able to read the PCMCIA card in the slot okay, but after a power cycle it loses config and claims the NVRAM is corrupt, throwing me to rommon. From there I can tell it to boot from disk0 and it boots alright from the PCMCIA card into the default config. Needless to say, any config I have entered gets lost. Which NVRAM is it referring to? The 4 meg on the motherboard? Is there anyway to clear and reset that, or does it just need to be replaced?
> 
> Warning: monitor nvram area is corrupt ... using default values
> C7200 platform with 131072 Kbytes of main memory
> 
> [after a power cycle....]
> 
> System Bootstrap, Version 12.2(4r)B, RELEASE SOFTWARE (fc1)
> TAC Support: http://www.cisco.com/tac
> Copyright (c) 2002 by cisco Systems, Inc.
> 
> Warning: monitor nvram area is corrupt ... using default values
> C7200 platform with 131072 Kbytes of main memory

It may be the battery on the I/O module.  Some are a soldered-in coin
battery and others are built in to a Dallas/Mostek/Maxim chip that is
also used for the clock/calendar.

If soldered in, you can replace the battery if handy with a soldering
iron.  If the Dallas chip, get a DS1248Y-70 from Mouser and replace it,
then re-initialize.  Repeat in about six to ten years, less if you leave
the box unplugged for a very long time.

--
Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
Impulse Internet Service  -  http://www.impulse.net/
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