2 BGP links with different path to the same ASes question

Hello nanog, Supose that we got network: AS 1 ---- iBGP ---- AS 1 | link 1 | link 2 | | AS 2 ---- iBGP ---- AS 2 and now, we want on one of those links (link 1) - setup only peering session and on (link 2) - start normaln internet tranis and if we pay for internet transit and not pay for peering, our idea is: - send peering IP packets via link1 - send packets from internet via link2 only way that i can see is the usage of source-route PS: assume that networks of AS1 and AS2 are big and meshed networks and there is need for set up a lot of acls and routemaps and take them all up of date! any better hints ? -- Adam Obszyński