[mrtg] IfName and MPLS interfaces

Daniel McDonald dan.mcdonald at austinenergy.com
Tue Jun 11 23:42:18 CEST 2013

In general, we use ifName to identify interfaces monitored by mrtg.
However, on MPLS PE or P routers, there are two instances with the same
ifName ­ one with ifType 6 for the physical characteristics, and one with
ifType 166 for the MPLS counters.  Without a lot of hacking to ignore ifType
166 interfaces, I think I¹ll need to come up with another way to identify
those interfaces.

Cfgmaker doesn¹t appear to have any sort of fallback to change ifref if the
criteria specified by ‹ifref is unavailable.  I tried a bunch of ways to
work around it, but short of creating a new configuration option, it¹s
pretty insistent on not allowing it.

Would anyone find that a useful option for cfgmaker?  Perhaps a name like
‹ifref2?  I imagine for consistency I would also need --ifdesc2....

Daniel J McDonald, CCIE # 2495, CISSP # 78281

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