Monitoring routes from Nagios

[Michael Ludvig]

Hi

What approach do you have for monitoring routing status in your 
environments? We've got OSPF set up between our sites (offices and data 
centres) and BGP for uplinks from some sites. I want to monitor by 
Nagios that everything is as expected.

For example:
- BGP feeds from ISPs look sane (e.g. include 0.0.0.0/0 - as that's what 
we are interested in)
- configured OSPF peers are all connected
- ... what else?

I can write some scripts to parse "birdc show ..." output and feed that 
into Nagios but perhaps someone has a better way to do that?

Thanks!

Michael