[9368] in North American Network Operators' Group
Re: Emergency backup for a small net
daemon@ATHENA.MIT.EDU (Kent W. England)
Mon May 19 14:31:26 1997
Date: Mon, 19 May 1997 11:04:33 -0700
To: "Miguel A.L. Paraz" <map@iphil.net>, bradley@dunn.org (Bradley Dunn)
From: "Kent W. England" <kwe@6SigmaNets.com>
Cc: nanog@merit.edu
In-Reply-To: <199705181449.WAA30914@marikit.iphil.net>
At 10:49 PM 18-05-97 +0800, Miguel A.L. Paraz wrote:
>
>What I would advocate here - though it is probably less feasible in
>the North American context - is application level multihoming. For
>mail, backup MX'es for inbound, and smarthosts for outbound. For
>Web access, if the ISP operates a proxy cache for its customers, the
>customers' actual IP address becomes irrelevant. There has been some
>discussion in the Squid users' mailing list about this, and we
>(the Squid contributors) are looking into means and ways of making
>upstream switchover more transparent.
And I would have the web servers addressed with overlays, using DNS to
switch between ISP addresses.
Another point; application level switching allows the routes to be
pre-established, leading to less delay, less route flapping, and better
maintenance.
>
>Granted, running caches in our part of the world (across the Pacific
>from MAE-West) is a must for reasonable performance at reasonable
>cost.
>
Even with HTTP 1.1, caches and mirrors are good performance enhancements
because no one point is close to every other point on the Net.
--Kent
