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Date:      Fri, 28 Jan 2000 10:17:27 -0500
From:      Jack Rusher <jar@rci.net>
To:        Alfred Perlstein <bright@wintelcom.net>, hackers@FreeBSD.ORG
Subject:   Re: downed IP addresses/redundancy
Message-ID:  <3891B307.620A684F@rci.net>
References:  <20000128045440.F7157@fw.wintelcom.net>

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Alfred Perlstein wrote:
> 
> Does anyone particularly like/hate this idea?  Just wanted to
> share, and possibly get better suggestions.

I usually do that like this:

HostA -> Address1, Alias1
HostB -> Address2

...where Host A and Host B talk to each other through the pair of
"real" addresses, while the service network uses the address referred
to above as "alias 1".  When Host A goes away, Host B does an
ifconfig <if> alias <Alias1> to bring up the service net address on
Host B.

  We just completed a full n-way local and wide area application
level failover product that runs under FreeBSD 3.x.  It does a lot of
this for you, including maintaining heartbeat links, starting and
stopping services, and the rest of the stuff you would expect from
such a beast.  Oh, and it runs cross platform; you can fail an Apache
(or whatever) instance between Solaris, Linux and FreeBSD.  Go check
out the press release at the URL below.

Yours,

-- 
Jack Rusher, Chief Engineer | mailto:jar@integratus.com
Integratus, Inc.            | http://www.integratus.com


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