Does dmesg show anything suspicious that might for example point to an overflowing connection tracking table or something similar? Regards, Dennis On 09/26/2011 10:17 PM, Aaron Linnen wrote: > Pinging from one domU other domUs shows dropped packets, which is how we > initially discovered something odd was going on. It also happens pinging to > the domUs from other physical machines. > > netstat -i in dom0 shows dropped packets (TX-DRP) on the vif devices. > Within the domUs it comes back with zeros. > > It only seems to happen under fairly heavy load. > > The machines in question are on the same bridge xen. That bridge has > separate subnets and one domU is a router that routes between them (and > performs LVS functions). > > Aaron > > On Mon, 26 Sep 2011 14:08:47 -0500, Nehemiah wrote: > >> what evidence do you have of packet loss? between the net and the >> machines or between machines bridged together with xen? >> >> -- >> Nehemiah I. Dacres >> Saint Louis University: Advanced Technology Group >> Linux System Administrator >> Sent with Sparrow <http://www.sparrowmailapp.com/?sig> >> >> On Monday, September 26, 2011 at 12:53 PM, Aaron Linnen wrote: >> >>> We are experiencing some packet loss between xen machines which we >>> haven't seen before. Is this a problem anyone's run into before and/or >>> has ideas on how to diagnose the issue? >>> >>> >>> The setup is CentOS 5 xen-3.0.3-80.el5_3.3 >>> >>> Aaron >>> >>> _______________________________________________ >>> CentOS-virt mailing list >>> CentOS-virt@xxxxxxxxxx <mailto:CentOS-virt@xxxxxxxxxx> >>> http://lists.centos.org/mailman/listinfo/centos-virt > > > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt@xxxxxxxxxx > http://lists.centos.org/mailman/listinfo/centos-virt _______________________________________________ CentOS-virt mailing list CentOS-virt@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos-virt
