[no subject]

> 6500s can do it, but enabling it doubles the size of the FIB, and the FIB
> can only hold 244,000 unicast entries.  So, with RPF enabled on any
> interface, your limit is now 122,000 routes.  With a full BGP view, you're
> probably dangerously close to this number.

This seems like the same issue as the FIB limits on the 12000 linecards :(

> You're supposed to be able to exceed that number and simply end up with some
> networks being software switched, however, I've seen a number of 6509s
> running native software either fall over or experience serious bugs (not
> fixed as of 12.1(13)E) when exceeding this limit.

On the 12000, the routes are just lost... and magically the attack
'stops', so does traffic to some randomly large number of destinations too
:( So this is 'suboptimal' to say the least.

BTW, Cisco has been made aware of these issues so its again, on deck for a
fix in the e5/6/7 linecard...