[j-nsp] RIB and FIB - Memory for MX with LR

[Adam Vitkovsky]

Yes L3VPN services are the biggest glutton of RIBs and FIBs, and already
exceed several millions of VPNv4 prefixes for some of the ISPs couple years
ago. 
That's why they have been using several distinct route-reflector planes and
hierarchies to be able to scale the distribution of intra and inter AS
prefixes as well as service dedicated PEs in major POPs to alleviate the
edge constrains i.e. number of VRFs/FIB entries per PE/Line-card. 

It kind of makes me sad to see these state of art designs being replaced by
several boxes capable of holding 22Megs of prefixes in RIB.

adam