[mrtg] Re: ifnum changes in Cisco routers

[Shipley, Rob]

In most cases Cisco routers have unique ifDescr and switches have unique
ifName. I would attempt to run cfgmaker with --ifref descr --ifdesc descr
for routers. That should eliminate your problem with referencing IP
addresses.
I had problems with the index/ifnum changing randomly also, and ifDescr is
working for me on routers. 
HTH
Rob S.


-----Original Message-----
From: John E. Pittle (Contractor) [mailto:jpittle.c at stc.com.sa]
Sent: Tuesday, August 27, 2002 8:24 AM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] ifnum changes in Cisco routers



Hi - 

I'm trying to get some more information I can read about how / why ifnum can
change in a Cisco router.  Cisco tells me its only if a add/del an
interface, and then, not in every case.  I'm seeing behaviour which suggests
its a little more random.  Can anyone suggest a source for further reading
on this topic?  

I've converted my mrtg cfgs to anchor based on interface ip address, but
that creates some new challenges for me on some interfaces that don't have
IP addresses.  If you have any suggestions on how to handle a device where
some interfaces of interest have IP and some do not, I appreciate your
guidance on that as well.

P.S. - many thanks to all of you who have contributed to get mrtg where it
is today - it is an excellent system.

Thanks,
John Pittle
---------------------------------------------
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Desk: +966-1-452-5874
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EMAIL: jpittle.c at stc.com.sa
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