setting BGP route preference on a multihomed edge router

[Chad Parish]

We are consolidating our two single-homed WAN edge routers into one multi-homed edgerouter.  We currently have a dedicated edge router for each ISP configured for eBGP and EIGRP.  We handle Primary ISP route preference by configuring the bgp to eigrp route redistribution with a lower delay on the edge router going to our preferred ISP.  But when we multihome from a single edge router, how would I do this?

[thecrev]

I'm not sure what type of edge router you're using, but you'd normally do this with bgp routing policies.

To send all of your upload traffic through a preferred ISP, you'd set an inbound policy on the link connected to the preferred ISP, which applies a local preference to a number higher than the default (500 is usually fine).

To receive all of your download traffic through a preferred ISP, you'd set an outbound policy on the link connected to the non-preferred ISP, which prepends your AS number at least 1 time.