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Using BGP For Load Balancing Doesn't Make Sense
- donavanm 14y agohttp://lmgtfy.com/?q=ecmp http://lmgtfy.com/?q=ecmp Secondly, no your bgp session won't automagically go do just because httpd dies. There's a whole mess of complexity hidden behind that assumption.
- fastest963 14y agoECMP doesn't work well on connection-based protocols, like TCP. Also, CloudFlare monitors processes and withdraws a route when a particular process dies, so that's why I mentioned that.
- donavanm 14y agoSerious? A huge amount of traffic sent over the Internet is multipath due to ECMP. Hashing on the full src/dst ip and port tuple makes for stable path selection. WRT to the second point, failure cases are not that simple. Edit: lets talk directly connected next hops, like a L2 domain. In this scenario what's the difference between "Anycast" and "ECMP"?