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Date:      Mon, 30 Apr 2001 21:39:19 -0700
From:      "Ted Mittelstaedt" <tedm@toybox.placo.com>
To:        "Kulraj Gurm (bosa.ca account)" <kulraj@bosa.ca>, "Ken Bolingbroke" <hacker@bolingbroke.com>
Cc:        <questions@FreeBSD.ORG>
Subject:   RE: Redundant Internet connections
Message-ID:  <000501c0d1f8$afae3c60$1401a8c0@tedm.placo.com>
In-Reply-To: <002901c0d0bd$e8466de0$64c8a8c0@asknet.com>

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>-----Original Message-----
>From: Kulraj Gurm (bosa.ca account) [mailto:kulraj@bosa.ca]
>
>I am pondering taking a second T1 with a different telco for
>redundancy, and
>your discussion has so far been interesting.
>
>I am a little confused however; maybe just my lack of
>understanding, but all
>your discussion on redundancy has been focussed on out bound
>traffic

No it HAS NOT.  Reread the message - I say "in and outbound traffic" many
times in
the response.

 - where
>I can conceptually see it working. But what are the DNS implications?
>
>We have numerous clients; and many of them have numerous domains. I
>generally assign an IP per client and virtual host as many sites as they
>want on the single IP. This is all through one telco at the moment. When a
>second telco enters the picture, and I get a different IP range assigned to
>the new T1. When the first network is down - all hosted sites will still be
>inaccessible.
>
>What would be the solution to this scenario.
>

The solution is to have both T1's go to the same ISP via different Telco's
and
run a routing protocol like OSPF with that ISP.

Or better yet put your virtual servers in a co-locate facility that has lots
of
redundancy in it and quit throwing money on Telco circuits.


Ted Mittelstaedt                      tedm@toybox.placo.com
Author of:          The FreeBSD Corporate Networker's Guide
Book website:         http://www.freebsd-corp-net-guide.com



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