North American Network Operators Group|
Date Prev | Date Next |
Date Index |
Thread Index |
Author Index |
Re: Localized mail servers, global scope
- From: Joe Abley
- Date: Thu Jun 23 14:40:21 2005
On 2005-06-23, at 10:57, Suresh Ramasubramanian wrote:
I know of people who have anycasted the address used by their clients
for mail submission using SMTP (so that clients connect to a stable
address, and the node which services their request varies according
to where they are connecting from).
Wild idea and there's just too much good german beer here at MAAWG
(www.maawg.org) in Dusseldorf, but .. anybody tried anycasting a
Operationally that is ...
Like all applications of service distribution using anycast, care is
required: e.g. a stable, internal network with a well-known topology,
and anycast nodes placed such that node selection by clients is
consistent, packet-to-packet, for periods of time far exceeding the
expected maximum transaction time.
The places I have seen this done have had POPs connected with
expensive and congested links, so keeping mail submission from
customers local and snappy was a big win.
I think you're talking about anycasting a server across the Internet
to act as a low-numbered MX, though. I haven't met anybody who
thought that was a good idea, yet. :-)