Hi Daryl Its a Virtual Machine running on esxi 4.1 using VMXNET 3 as the network adaptor.
The physical machine is a dell 1950 which does have broadcom network adaptors. Is there anything I need to take account of running LVS on esxi? Thanks Paul On 27.06.2013 13:28, daryl herzmann wrote: > Hi, > > Is this a bnx2 card? Try disabling GRO for both devices > > ethtool -K eth0 gro off > ethtool -K eth1 gro off > > daryl > > On Wed, 26 Jun 2013, [email protected] wrote: > >> 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 >> _______________________________________________ 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
