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On Tue, 21 Jul 2009, Jay Faulkner wrote:
> Hey guys,
>
> The problem we're experiencing now is that somewhere
> between 3% and 7% of all connections are dropping -
you don't say what "dropping" is. Is it entries disappearing
from the ipvsadm table? clients getting RST?
> same behavior you'd see with an iptables DROP rule or a
> missing return route. We aren't seeing the issue when we
> transition from a LVS to a direct DNAT to a VIP.
this is a wierd one. Looks a bit like arp hopping, so
let's assume it's a routing problem. Let's look for wierd
reasons.
o make sure there are no iptables rules on any of the
machines.
o test with local client (not through proxy) connecting to
VIP
o make sure there is no physical route from the realserver
to the client except throught the DIP - ie no routes that an
imcp redirect that change. check your routes with
ip route show
(not `route -n`)
o test with a simple client. telnet is best (to port 23)
then next best is telnet to port 80 and do a GET
Joe
--
Joseph Mack NA3T EME(B,D), FM05lw North Carolina
jmack (at) wm7d (dot) net - azimuthal equidistant map
generator at http://www.wm7d.net/azproj.shtml
Homepage http://www.austintek.com/ It's GNU/Linux!
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