[mrtg] ifnum changes in Cisco routers

[John E. Pittle (Contractor)]

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
---------------------------------------------
Saudi Telecom - Data Network Operations Center
Desk: +966-1-452-5874
GSM: +966-54-413-956
EMAIL: jpittle.c at stc.com.sa
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