Just as a bit of a heads-up in case anyone else is hitting this issue (and not aware).

We tend to be learning a total of about 511k or so unique IPv4 routes nowadays from external peers. Combine this with various internal routes and the actual number of IPv4 routes on a couple of our border routers is a few short of 512k.

If any of these routers have a RIB or FIB limit of 512k IPv4 routes then expect some strange issues.

Like random routes not showing up in your routing table..

*cough* brocade xmr default cam partition *cough*

Have a nice day!

Cheers

Dave