[mrtg] Re: Index changes on reboot

Daniel J McDonald dan.mcdonald at austinenergy.com
Mon Aug 18 16:50:37 MEST 2003

On Mon, 2003-08-18 at 09:17, Jason Humes wrote:
> Hello
> We graph about 100 routers and with the mass power outages and UPS power
> running out, all of our interface index have changed and now graphs have to
> be rescanned for them to work again.  How can I make my config files work so
> that they use the index name (ie. G0/1, fa0/1, etc) instead of index
> numbers...please provide an example for me as I've tried to use ifindex
> before and I could not get the syntax to work properly. 

If you re-run cfgmaker, just set --ifref=name.

if you want to tweak them manually, you will want:

target[foo.1]: #Fa0/1:public at foo.router.com::::2

Naturally, cfgmaker is easier.

So, for example, I call:
 /usr/local/mrtg-2/bin/cfgmaker --ifref=name --ifdesc=alias
--if-template=6500.template --subdirs=ecc/HOSTNAME
--output=ecc-6500-yellow.cfg public at ecc-6500-yellow:::::2

and I get target lines like:
Target[ecc-6500-yellow_Gi1_1]: #Gi1/1:public at ecc-6500-yellow:::::2
Target[ecc-6500-yellow_Fa2_1]: #Fa2/1:public at ecc-6500-yellow:::::2

I upgraded code on all of my 100 boxes, changed a couple of chassis out,
and generally had a good time this weekend.  MRTG never knew anything
was amiss.

>  Thanks very much.
Daniel J McDonald, CCIE 2495, CNX
Austin Energy

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