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Re: high availability between real servers ?

To: Alex Kramarov <alex@xxxxxxxxxxxxxxx>
Subject: Re: high availability between real servers ?
Cc: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
From: Julian Anastasov <ja@xxxxxx>
Date: Thu, 1 Aug 2002 10:05:53 +0000 (GMT)
        Hello,

On Thu, 1 Aug 2002, Alex Kramarov wrote:

> actually, my connections hang even if i use a different server from the real
> server, define another vip on the internal NIC of the director, and all 3
> ip's (vip, rip, client) are on the same network (10.0.0.) using lvs-nat. any

        Hey, all our IPs are in the 0.0.0.0/0 subnet. No?
So, you can correctly define your subnets for NAT in this way:

- all RSs have RIP/32 (note, this is not /24)

        ifconfig eth0 10.0.0.1 netmask 255.255.255.255

- all RSs have known gateway (their director)

        route add -host 10.0.0.DIP1 dev eth0
        route add default gw 10.0.0.DIP1

        It should work with NAT. In this case 1 IP can be subnet.
I assume 32 is allowed network size for a subnet :) It fulfills
the NAT requirements all clients to be visible through the
director gateway. In the director you also need correct host
routes to all your subnets /32 (the RSs). No need to use extra
devices.

        For DR you don't need such small/separate subnets, all your hosts 
can be one the same /24 subnet.

> Alex.

Regards

--
Julian Anastasov <ja@xxxxxx>



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