Stable iBGP peering
Need to unlink iBGP from physical topology
Carry loopback addresses in iBGP
router ospf <ID>
network <loopback address> 0.0.0.0 area <x>
Unlink peering from physical topology
router bgp <ASN>
neighbor <x.x.x.x> remote-as <ASN>
neighbor <x.x.x.x> update-source loopback0