n N==3 ?
u Can pick ingress, egress AND core – this
is important as it levels the playing field
for core (tier 1/0) provicers
u Egress is important for client and server
side resilience.
n Use BGP Community Attribute – need
#AS^2 worth of 3 values – diameter of
net is 7, so 50*3 – fits in 1 byte….