Adam,
I must admit at first looking at your config-register excel
sheet it looks pretty good.
Once I get a chance I'll mess around and see how things work out...
Pretty Neat and thanks for sharing....
Nigel
----- Original Message -----
From: Adam Quiggle <[EMAIL PROTECTED]>
To: Chuck Larrieu <[EMAIL PROTECTED]>; Cisco Mail List
<[EMAIL PROTECTED]>; CCIE_Lab Groupstudy List <[EMAIL PROTECTED]>
Sent: Monday, January 08, 2001 3:11 AM
Subject: Re: Troubleshooting 102 - "password recovery"
> Chuck,
>
> I know it's a little late, but feel free to help yourself to
> this configuration register setting thing that I received
> and have since modified to suit my needs. It has all of the
> corresponding values in the configuration register and what
> they mean.
>
> http://home.nc.rr.com/quiggle/ConfigReg.xls
>
> There is a place to convert the configuration register to
> binary, so that you can easily see the configuration. In
> addition there is a place to enter the binary values you want
> and it'll spit out the configuration register for you. :-)
>
> Not that you can't find what you need on CCO, but sometimes its
> just more convenient to have it on a laptop that can travel
> with you. :-)
>
> If anyone sees any errors, please let me know.
>
> Thanks,
> AQ
>
> At 01:57 AM 1/8/01, Chuck Larrieu wrote:
> >Well that wasn't nearly so bad as it could have been. The low life who
> >trashed my router, not to mention spoiled it for a lot of folks on these
> >lists, could have been more malicious. But he was deliberate. No doubt
about
> >it.
> >
> >So here is today's troubleshooting lesson - not really password recovery,
> >but configuration register setting recovery. I have done a bit of
password
> >recovery practice, but not much.
> >
> >1) cannot get into rommon mode. Not that I can tell. Gibberish of various
> >sorts on screen. Check to be sure my version of HyperTerminal sends the
> >correct control-break sequence, using another router. it does. I was sure
I
> >had upgraded this particular version, but these days, when moving between
so
> >many different computers at home and on the job, one never can tell.
> >
> >2) Ok, with gibberish on the screen, what are some things to check? A
quick
> >look through CCO confirms that baud rate is the only terminal setting
that
> >can be changed in the register. Thank goodness one cannot also change the
> >data, stop, and parity.
> >
> >3) OK. Brute force this thing. 9600 does not work. Let's work down the
> >scale, and see..... 4800 does not work. 1200 did not work earlier this
> >afternoon. But 2400 does work. I see clear text and I see I am in rommon
> >after all.
> >
> >4) Check the current config register setting. E/s 2000002 [enter] reveals
> >the setting as 0x3942 you bad boy!
> >
> >5) Use the o/r 0x2102 to reset the register and reload.
> >
> >6) Rommon again! Hhmmm.........
> >
> >7) OK, this time do a config mem ( I probably should have looked at this
> >last time anyway, but I did not )
> >
> >8) Well, what did the yo-yo do here? Hostname rommon> interesting.
> >Certainly explains the console message I was seeing last time I reloaded.
> >Well, I don't have time to fool around any more. Erase start, reload,
things
> >come up ok. I will copy my saved configuration later.
> >
> >9) Too bad garbage-head inserted himself into this weekend. Someone was
> >doing a very interesting IPSec tunnel between my pod and theirs. I was
> >looking forward to seeing the result.
> >
> >10) End result - learned a few more things which will be valuable in the
> >lab - troubleshooting portion.
> >
> >Extra credit - with a configuration register setting of 0x3942, what was
> >happening at boot time?
> >
> >Chuck
> >----------------------
> >I am Locutus, a CCIE Lab Proctor. Xx_Brain_dumps_xX are futile. Your life
as
> >it has been is over ( if you hope to pass ) From this time forward, you
will
> >study US!
> >( apologies to the folks at Star Trek TNG )
> >
> >_________________________________
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>
>
> **************************************************
> Adam Quiggle
> Senior Network Engineer
> MCI Worldcom/NOC/BP Amoco
> [EMAIL PROTECTED]
> **************************************************
>
> _________________________________
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