My question is about iBPG path selection for default routes. My AS is multi-homed using two different eBGP gateways to my ISP. We can call my ISP facing gateways eBGP1 and eBGP2. I’m learning only the default route to the Internet over these gateways.   My iBGP routers (iBGP1 & iBGP2) are learning the default route from eBGP1 and eBGP2. To support an Active/Active multi-homed environment. I desire iBGP1 to forward to eBGP1 and iBGP2 to forward to eBGP2. Of course, eBGP2 is the backup gateway for iBGP1 and vice versa, eBGP1 is the backup for iBGP2.   The failover needs to be dynamic and occur timely, we know BGP doesn’t like change. How best could I achieve these goals? What are your ideas or best practices for this design.    My idea is to use a filter lists on my iBGP routers. Where I increase the MED from prefixes (default route) I learn from my backup eBGP gateway.   Thanks ... View more

You can control which ISP you send traffic to, but you can't control which ISP the traffic will return from when you advertise your ip space to each ISP. Sent from Cisco Technical Support iPad App ... View more

Sorry, I should have included this... For Example: int vlan302 service-policy input Packet-Tagging policy-map Packet-Tagging class Business_Critical set precedence 3 class-map match-any Business_Critical match access-group name ERP_traffic ... View more