Route table prefix monitoring

Joel Jaeggli joelja at
Thu Sep 10 11:23:21 UTC 2009

Olsen, Jason wrote:
> Howdy all,

> What I'm left thinking is that it would have been great if we'd had a
> snapshot of our core routing table as it stood hours or even days prior
> to this event occurring, so that I could compare it with our current
> "broken" state, so the team could have seen that subnet in the core
> table and what the next hop was for the prefix.  Are there any tools
> that people are using to track when/what prefixes are added/withdrawn
> from their routing tables, or to pull the routing table as a whole at
> regular intervals for storage/comparison purposes?  It looks like
> there's a plugin for NAGIOS, but I'm looking for suggestions on any
> other tools (commercial, open source, home grown) that we might take a
> look at.  For reference, we are running Cisco as well as Juniper kit.

Periodic table dumps, or even a log of the updates from a quagga router
inside your infrastructure could provide this information. That in a
nutshell is what routeviews and other collectors do for the dfz routing

> Feel free to drop me your thoughts off-list.
> Thank you for any insight ahead of time,
> -Jason "Feren" Olsen

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