For incoming and outgoing traffic, separate routing policies were implemented for the relationships:
a. Customer-In : All customer routes were taken and local preference set to 200.
b. Customer-Out : Advertised all routes to the customer as we are the transit provider.
c. Peer-In : All Peer routes were taken and local preference set to 150. This would mean the customer route would be preferred over a peer route.
d. Peer-Out : Advertized only customer tagged routes to the peers.
e. Transit-In : All routes from the transit provider were taken and local preference set to 100. As we pay the transit provider, we try to keep the costs minimum by preferring transit provider routes, only if we do not have the customer or peer routes for the same destination.
f. Transit-Out : Advertized only customer tagged routes.