From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Friesen Subject: recommended way to support duplicate IP addresses on different VLANs? Date: Mon, 11 Jul 2011 08:58:14 -0600 Message-ID: <4E1B0F86.2040508@mail.usask.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: netdev@vger.kernel.org Return-path: Received: from idcmail-mo1so.shaw.ca ([24.71.223.10]:24578 "EHLO idcmail-mo1so.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756441Ab1GKO6P (ORCPT ); Mon, 11 Jul 2011 10:58:15 -0400 Sender: netdev-owner@vger.kernel.org List-ID: Hi all, We've got a server that sits on multiple VLANs. Each VLAN is segregated and doesn't know about the others. The IP address ranges in each of the VLANs may overlap, and the server may be assigned the same IP address in multiple VLANs. We've got a messy solution now involving unique internal addresses and NATing between those and the duplicate external addresses, but I'm wondering if there is a cleaner way to handle this. It seems like network namespaces would work, but it would require multiple instances of our software which is a dealbreaker. Is there any other way to deal with this scenario? Thanks, Chris