SNMP monitoring of routing tables

Leo Bicknell bicknell at
Tue Mar 13 13:15:34 CDT 2012

In a message written on Tue, Mar 13, 2012 at 10:54:08AM -0700, Walter Keen wrote:
> Trying to work on an interesting project, where it would be nice to monitor the routing table of a collection of routers, store it, and look at it later, as a snapshot of what the routing table for a particular router looked at a particular time. All the information I'm wanting (route entry, nexthop, etc) is available via snmp on the ip-route mib I believe, and needs to stay fairly generic, or equipment-agnostic.
> Does anyone know of an existing project to do this before I start trying to make one?

RIPE's RIS and Route-View's both archive BGP tables and you can download
them and manipulate them.  There are several other services that archive
the data, like Renesys, but don't provide raw data downloads.

SNMP is really a non-starter for this work.  Too slow, the table changes
out from under you, plus it's hugely inefficient.

       Leo Bicknell - bicknell at - CCIE 3440
        PGP keys at
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