[181086] in North American Network Operators' Group
Re: Anycast provider for SMTP?
daemon@ATHENA.MIT.EDU (Max Tulyev)
Mon Jun 15 15:19:37 2015
X-Original-To: nanog@nanog.org
Date: Mon, 15 Jun 2015 22:16:46 +0300
From: Max Tulyev <maxtul@netassist.ua>
To: nanog@nanog.org
In-Reply-To: <CAO0-hXZKU2gSt3vqj_p0B85xH=yt6RwXJfh_EY9HTzhygnj0Rg@mail.gmail.com>
Errors-To: nanog-bounces@nanog.org
I see no major problems to use anycast for that.
The problem will be in rare case when particular routing chain from
client to one of your servers will be changed until TCP stream is active.
SMTP have short connections. Even if it happens, it will look as just
broken connection for client, and it will shortly re-try it.
Am I lost something?
On 15.06.15 20:50, Joe Hamelin wrote:
> 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.
>
> Have any of you seen something like this work in the wild?
>
>
> --
> Joe Hamelin, W7COM, Tulalip, WA, 360-474-7474
>
