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1534 Views 7 Replies Latest reply: Apr 15, 2012 2:27 PM by Stephen RSS

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bgp multi-homed failover with as_path prepending

Apr 12, 2012 5:32 PM

I have a multi-homed failover scenario. I advertise my public subnet to ISP1 with normal AS path and prepend the AS path going to ISP2 so that ISP2 will act as the backup. I would expect that for the inbound traffic, everything will go to ISP1. But after inspecting the traffic through the firewall/router, I see inbound traffic going through ISP2 as well. How do I fix that? I only want inbound traffic via ISP2 if ISP1 would go down. Is this something that ISP2 has to do on their end? Thx

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