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

[Vinny Abello]

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This was one of the first things I checked as well. This is the version I'm running:



ROM: System Bootstrap, Version 12.4(13r)T5, RELEASE SOFTWARE (fc1)



- From what I could find, that appears to be the latest one for the 1841 unless someone knows something different.



- -Vinny



On 7/18/2011 8:50 AM, Chuck Church wrote:

> 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 <mailto: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>

>> [mailto: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 <mailto: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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