We are setup between two ISP for redundancy, receiving full routes from each, one primary 1Gb/s with a 300Mb/s backup. We are using prepending to add a few hops to the backup circuit so that most of the traffic comes through the primary circuit.
However, if maintenance is done causing an even brief outage to the primary circuit, it seems like the route-map no longer works, even after the primary circuit comes back up. The majority of the traffic comes through the backup circuit. In order to resolve the issue, I can remove the route-map, wait for the tables to adjust, and then reapply the route-map. After doing so, the traffic flips back to the primary circuit.
Anyone know what is going on? Is there a better way to do things?
Thank you.
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