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