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Re: Intermitent access to real-servers

To: Joseph Mack <mack.joseph@xxxxxxx>
Subject: Re: Intermitent access to real-servers
Cc: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
From: James Ogley <james.ogley@xxxxxxxxxxxxxx>
Date: 07 Jun 2001 15:54:22 +0100
> I don't know why you have IPs in the 172.21.193.0 network on the real-servers.
> Want to fill us in?

That's so that the real-servers can talk to our MySQL servers - they
need to be in our normal IP range...

> I also don't know if you have 1 or 2 NICs on the director and how
> you separate the real-server network from the client's network.
> If you don't have them separated, icmp redirects from the director
> will stop your VS-NAT setup from working. 

We have 2 NICs in the director box, but the second is used for
heartbeating

The problem was the ICMP redirects, we had previously disabled these,
but it appears that when we upgraded to 0.8 or 0.9 (probably the latter)
and rewrote our init.d scripts for bringing up the LVS, we'd broken the
bit that disabled them, we've sorted that now, and it appears to have
fixed it. (Many thanks!)

Mostly anyway, we're still seeing very occasional 'hung' connections,
although the number of them is dramatically reduced, and unlike before,
hitting Reload works, any idea why this might be?

Thanks again

James




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