Failover routing with dual-homed sites

From: Arrigo Triulzi <arrigo_at_northsea.sevenseas.org>
Date: Mon, 02 Oct 2000 18:01:27 +0100 (BST)

Dear all,

I am about to take delivery of a second leased line on our premises
and I would like to set up a simple redundant routing system.

The setup I envisage is:

--->leased line #1 --->[router]----+
                                   |IP range #1
                                   +--- boxes with IP aliasing
                                   |IP range #2
--->leased line #2 --->[router]----+

where the two leased lines give me different address ranges. What I
have done so far is give IP aliases to some key machines and moved
them over to the new line which has far more bandwidth.

What I would like to use the old leased line as a backup until the
contract expires well into 2001. To do so I wanted something simple
like a second default route with a higher metric which, at least in
the Linux case, is taken up when the lower metric one fails.

Because the routers are not under my control I cannot run any routing
software (e.g. RIP which I am aware is rather insecure) to take care
of this dynamically.

Fundamentally I can do it under Linux but can't quite figure it out
under T64U, should I use /etc/routes and add a second default with a
'metric' parameter?

Thanks,

Arrigo

   
Received on Mon Oct 02 2000 - 17:03:10 NZDT

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