[c-nsp] Disappearing Interfaces in config

[Church, Chuck]

It's my understanding that the router config is 'created' by the router
parsing all the data structures for interfaces, protocols etc.  Sounds
like a bug has caused it to stop seeing all these things, even though
they're working properly.  I wouldn't reboot it, because you'll lose all
those ones that stopped making it into the config.  I'm sure a later IOS
fixes it, but it might take some work to get a working config again.
I'd grab a few previous configs, and compare those to a current 'sh int'
and see if you can piece together a config with all interfaces.  Then
reload it with what ever IOS seems to fix the problem, and paste in
what's missing.  Is this router low on memory, possibly affecting the
real-time creation of the config?  On the other hand, I'd be reluctant
to put a different IOS on a router that's been up for over a year, but
that's just me ;)


Chuck Church
Lead Design Engineer
CCIE #8776, MCNE, MCSE
Netco Government Services - Design & Implementation
1210 N. Parker Rd.
Greenville, SC 29609
Home office: 864-335-9473
Cell: 703-819-3495
cchurch at netcogov.com
PGP key: http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x4371A48D


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Charles
Sprickman
Sent: Monday, October 18, 2004 2:30 PM
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Disappearing Interfaces in config

I'd also like to add that the interfaces DO NOT show in in "sh run"
either, "service compress-config" is on, and the interfaces are up and
passing traffic...  Looking at old cvs logs it seems I've lost about 100
interfaces, including a few loopbacks.

Charles

On Mon, 18 Oct 2004, Charles Sprickman wrote:

> I've got a stumper here...
>
> We've got a 7206 running 12.2(8)T5 (cco expired) and I noticed that
rancid
> has started showing me about 5 interfaces that appear and then
disappear
> on each run.
>
> I took note of one and found that I can see the interface is
configured:
>
> router.bway.net#sh in atm 4/0.2491
> ATM4/0.2491 is up, line protocol is up
>   Hardware is ENHANCED ATM PA
>   Interface is unnumbered. Using address of Loopback8 (216.220.x.1)
>   MTU 4470 bytes, BW 40704 Kbit, DLY 190 usec,
>      reliability 255/255, txload 207/255, rxload 73/255
>   Encapsulation ATM
>   60187 packets input, 4705441 bytes
>   62612 packets output, 4946027 bytes
>   1 OAM cells input, 1 OAM cells output
>   AAL5 CRC errors : 0
>   AAL5 SAR Timeouts : 0
>   AAL5 Oversized SDUs : 0
>
> And after doing a "wr mem" I see no sign of it in the config:
>
> router.bway.net#sh conf | inc 2491
> ip route 216.220.x.91 255.255.255.255 ATM4/0.2491
>
> The route to the pvc is there, but no matching config for the
interface.
>
> I've got 1721 pvcs configured:
>
> 4095 maximum active VCs, 1721 current VCCs
>
> Any ideas?  This just came out of nowhere.  No reboot in over a year,
and
> all of our pvc configs are done in advance, so we have not added any
> interfaces since maybe 5 months ago.
>
> Thanks,
>
> Charles
>
> --
> Charles Sprickman
> spork at inch.com
>
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