[c-nsp] 1841 dumps to rommon only on power failure

[Chuck Church]

I've seen rommon updates that deal with flash access timing on a lot of the
ISRs.  Might be something to check out.

Chuck
On Jul 18, 2011 5:58 AM, "Henry-Nicolas Tourneur" <
hntourneur at autempspourmoi.be> wrote:
> I would say: your issue sounds to be physical not software related.
> Probably there's some weird happening on your power circuit when it goes
> down, otherwise you should have the same issue with the power switch.
> Since it's hard to say what happens when your power source goes down,
it'll
> be hard for us to tell you the exact cause.
>
> You should try to reproduce the conditions of the power cut, if the power
> switch doesn't work, try shutting down your fuse, if possible.
> When you succeed to reproduce the conditions, try moving your router to
> another location and see if it behave the same way.
> If it does, then your router might be faulty, if it doesn't, then you
might
> have an issue with your power circuit.
>
> Hope it helps,
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Vinny Abello
> Sent: lundi 18 juillet 2011 5:58
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] 1841 dumps to rommon only on power failure
>
> Got an interesting problem I thought someone else might have
> experienced. I have an 1841 in my home that I've used for a while.
> Recently (probably within the past year) I noticed that when it looses
> power, the next time it powers on it doesn't boot properly and just gets
> dumped to rommon. This problem may have existed far longer as it used to
> be on a UPS, but now is just on a surge protector. I know what everyone
> is going to say, your config registers aren't set properly... Well, yes
> they are. I've verified the config register being 0x2102 a dozen times
> now and even reset it a few times to be sure. The odd thing about this
> is if I simply reboot it again, it starts fine. Even if I power cycle it
> with the rocker switch it boots up fine. I literally cannot reproduce
> the problem by powering it off and back on, yet every time there is a
> power failure, it fails to load IOS and a reboot is the quick fix. This
> kind of stumped me having used Cisco routers and switches of all types
> for many many years now. The only thing I could think of is that somehow
> the lack of power for an extended period is causing it. Could this
> behavior be caused by the battery on the main board being too low of
> voltage? I think it was rated for 3.3 volts and measuring slightly over
> 3 volts but my memory may be foggy on that. Any other thoughts (other
> than put it on a UPS like it used to be)? :)
>
> Thanks for any thoughts...
>
> -Vinny
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