[c-nsp] confreg 0x42 on a Sup32

[Tim Stevenson]

Hi Graham,

You need to do this from *both* rommons. The 
config reg is sync'd between RP & SP when you do 
a write mem, but if you are manually changing it 
from in the rommon, then each rommon is going to have an independent value.

Break to the SP, confreg 0x2142, reset, then wait 
for the RP rommon to take control, it's after this msg:
00:00:07: %OIR-SP-6-CONSOLE: Changing console ownership to route processor

Then break to RP, confreg 0x2142, and reset, the 
box should come up w/no running config (startup will still have everything).

Make sure to restore the config-register 0x2102 
in config mode & write mem after you've changed the password.

Hope that helps,
Tim



At 06:35 AM 7/31/2009, Graham Wooden asserted:

>Thanks Tim and Jesse for the replies.
>
>Well, I only had a small window this morning to get this resolved and
>both confregs from rommon didn't seem to bypass the config like I
>wanted. Also tried just confreg with no args, and selecting it to
>ignore the config with still no affect.
>
>But as I type this, I did it from the SP rommon.  Should I have done
>the break at the RP boot instead?
>
>I will have another window this evening to get this resolved. Thanks
>for any suggestions.
>
>-graham
>
>
>Quoting Tim Stevenson <tstevens at cisco.com>:
>
> > Hi Graham -
> >
> > The same rules for confreg that apply to the other c6k sups apply here
> > as well.
> >
> > Typical/recommended for sup32 is 0x2102. To ignore config 0x2142 will
> > do it. 0x42 should work too, but for one thing, ignore break will be
> > disabled, which is not desirable (router can drop to rommon during
> > runtime due to deliberate/spurious break).
> >
> > Hope that helps,
> > Tim
> >
> >
> >
> > At 06:07 PM 7/30/2009, Graham Wooden asserted:
> >
> >> Hi there,
> >>
> >> Not much out there on this for the Sup32. 
> But since the Sup32 is a upgraded
> >> MSFC2, will the config register ³0x42² bypass the config?
> >> Someone borked up the aaa auth and I can't get into it.  Bah.
> >>
> >> Thanks,
> >>
> >> -graham
>




Tim Stevenson, tstevens at cisco.com
Routing & Switching CCIE #5561
Technical Marketing Engineer, Cisco Nexus 7000
Cisco - http://www.cisco.com
IP Phone: 408-526-6759
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