Mutliple routing tables

VRF (virtual routing instances) for VPN setups
each customer has a own routing table

policy routing
change routing decisions per packet/customer
premium and bulk bandwidth
different upstreams for business / residential customers
pass all P2P traffic over cheap links

selection of table done via pf
        pass in from 192.168.42/24 rtable 3 keep sate
extends route-to / reply-to
but not a replacement