Hi Ive been looking into LVS to help balance load amongst some SMTP servers.
I have set up a test LVS system in front of 3 real SMTP servers. I'm using direct routing and have used the iptables method on all 3 real servers to overcome any arp issues i.e. iptables -t nat -A PREROUTING -p tcp -d <vip> --dport 25 -j REDIRECT My testing seems to be going well and I can see traffic being balanced between the 3 servers, however I ran tcpdump on the lvs server just to look at the traffic and noticed im getting lots of TCP Retransmission and some TCP Dup ACK's I ran tcpdump on a normal SMTP server and don't see anywhere near as many. Can someone lend me their experience and advise if this something I need to worry about and investigate further? Thanks Paul _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - [email protected] Send requests to [email protected] or go to http://lists.graemef.net/mailman/listinfo/lvs-users
