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Re: Server_gw for an internal network only

To: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
Subject: Re: Server_gw for an internal network only
Cc: "'George L Chamales'" <chamales@xxxxxxxxxx>
From: Joseph Mack <mack.joseph@xxxxxxx>
Date: Thu, 07 Mar 2002 05:06:09 -0500
Peter Mueller wrote:
> 
> > I don't understand the necessity to specify the network gatway for the
> > director and realservers.
> >
> > If the gateway is just the machine that connects the
> > director/realserver's
> > network to the rest of the internet, why can't the
> > realservers use their
> > own routing tables to decide whether the reply packets should
> > be going to
> > the local net or through the gateway?

This is true except that there are some restrictions.
 
> Assuming you have LVS-DR topology (not NAT) it shouldn't matter what the
> gateway is so long as you don't ARP-reply for the VIP from the
> real/appplication servers.  

The other restriction is that the VS-DR realservers cannot use the director
as the default gw. If you want to use the director, you need Julian's martian
patch on the director.

Joe
-- 
Joseph Mack PhD, Senior Systems Engineer, Lockheed Martin
contractor to the National Environmental Supercomputer Center, 
mailto:mack.joseph@xxxxxxx ph# 919-541-0007, RTP, NC, USA


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