[181207] in North American Network Operators' Group
Re: Anycast provider for SMTP?
daemon@ATHENA.MIT.EDU (Baldur Norddahl)
Thu Jun 18 16:01:46 2015
X-Original-To: nanog@nanog.org
In-Reply-To: <DD2CBC7E-2D13-4DBB-9235-9A3B712B7D19@hopcount.ca>
Date: Thu, 18 Jun 2015 22:01:42 +0200
From: Baldur Norddahl <baldur.norddahl@gmail.com>
To: Joe Abley <jabley@hopcount.ca>
Cc: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
Den 18/06/2015 21.52 skrev "Joe Abley" <jabley@hopcount.ca>:
>
> On 18 Jun 2015, at 15:43, Jonas Bj=C3=B6rk wrote:
>
>> While risking being slightly off topic: Does anyone use anycast dhcp
servers?
>> Have you run into any problems considering synching the leases?
>
>
> Since DHCP uses broadcast and multicast addresses when a client is
discovering a server, it's not obvious why you'd have to.
Because clients will switch to unicast for renewal. Also clients will stay
with the current server forever, so you might have a bad distribution of
load between the servers. If one server was down everyone will switch to
the other and never go back until forced.
Regards
Baldur
