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On Thu, 2002-11-14 at 13:13, Richard Gabriel wrote:
> Hi,
>
> I have set up a DR based LVS on my director with keepalived for failover. I
> am using 2 real servers which are on the same network as the directors. All
> machines use a router as the gateway. When I start keepalived (which sets up
> the LVS configuration), everything works fine. After some time though, all
> ActConns and InActConns go to zero. When this happens, all traffic seems to
> go to only one of the real servers. Any help is greatly appreciated.
>
> I am using RedHat linux 8.0 with kernel 2.4.18. Thanks.
This sounds like the classic 'ARP Problem' Your real server is arping
for the IP address and getting into the routers arp-cache. The router
is then sending traffic directly to the real server. Connections bypass
the directors so you see no activity.
With LVS-DR you *MUST* disable ARP on the real servers. There are
several parts of the HOWTO which explain this infamous problem.
-Matt
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