Re: [lvs-users] LVS not forwarding packets to real servers

To: " users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] LVS not forwarding packets to real servers
From: Dusan Djordjevic <dusan.djordjevic@xxxxxxxxx>
Date: Mon, 9 Feb 2009 12:15:38 +0100
> You're trying to setup a NAT config, yes?
> Do the realservers have a route back through the second director? I'd
> hazard a guess that they don't. If they don't, the traffic will be
> trying to exit via the first director (which you say is working) and
> will never get un-NATted back to the client.
> For a HA setup using NAT you need to ensure that the *internal* gateway
> - the one the realservers use - can float between the directors, but
> note that it will only ever work on one at a time.

Hi Graeme,

Thank you for your response. Yes, you are right, it seems to be the problem.

In that situation, what is recommended routing technique to achieve
high availability ? NAT obviously is not, since I would need to change
default gw with every failover, which is not simple at all. Direct
routing is not an option, since I would like to have real servers in
private IP range. Would direct routing do the job then ?

Best regards,

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