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X-Original-To: nanog@nanog.org From: John Orthoefer <jco@direwolf.com> In-Reply-To: <CAO0-hXZKU2gSt3vqj_p0B85xH=yt6RwXJfh_EY9HTzhygnj0Rg@mail.gmail.com> Date: Mon, 15 Jun 2015 13:55:48 -0400 To: Joe Hamelin <joe@nethead.com> Cc: NANOG list <nanog@nanog.org> Errors-To: nanog-bounces@nanog.org Well we, Genuity, use to use Cisco Distributed Director to do this. = Basically it was a DNS server that ran on a Cisco Router, and could use = a lot of different metrics to give an answer, which included routing = based metrics. =20 Johno > On Jun 15, 2015, at 1:50 PM, Joe Hamelin <joe@nethead.com> wrote: >=20 > I have a mail system where there are two MX hosts, one in the US and = one in > Europe. Both have a DNS MX record metric of 10 so a bastardized > round-robin takes place. This does not work so well when one site = goes > down. My solution will be to place a load balancer in a hosting site > (virtual, of course) and have it provide HA. But what about HA for = the > LB? At first glance anycasting would seem to be a great idea but = there is > a problem of broken sessions when routes change. >=20 > Have any of you seen something like this work in the wild? >=20 >=20 > -- > Joe Hamelin, W7COM, Tulalip, WA, 360-474-7474
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