[mrtg] Re: Routing Table Size

Rich Adamson radamson at routers.com
Mon Jul 22 05:21:48 MEST 2002

None of the router vendors provide an snmp mib that would indicate 
the total number of routes in their routing table. Would be kind of
nice though.
As network consultants we've written a small application that monitors
the route broadcasts (eg, rip, ripv2, ospf, igrp) and logs changes.
But it would not be something that you'd want to use. If you are
using rip, it shouldn't be that hard to write something to do the
equivalent and drop that number to mrtg.

> 	Unfortunately I believe I did ask the wrong question.  My problem is
> that I cannot find any OID that will give you the total number of
> routes, the only thing I have found so far is the standard routing
> table entries (Source, Destination, Next Hop) when trying to poll a
> Cisco device (12000 GSR, 6500MSFC, 8400).  Currently the only way I
> have been able to extract the information that I need is to write a
> script to go out and poll the device and calculate the number of
> routes.

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