This article provides information about ovs and command that can be used to troubleshoot ovs related issues
# ovs-vsctl list open_vswitch
#ovs-vswitchd -V
# service openvswitch status
# ovs-vsctl list bridge
# ovs-vsctl list port
# ovs-appctl fdb/show xenbr0
# ovs-dpctl show -s
7. Dump flows
# ovs-dpctl dump-flows xenbr0
# ovs-appctl bond/list
# ovs-appctl bond/show bond0
Log locations for ovs
XenServer 6.0, 6.1 Log Files
In XenServer 6.0 and XenServer 6.1 all openvswitch logs have been sent through syslogd and are thus present in /var/log/messages*
XenServer 6.2+ Log Files
Starting in XenServer 6.2 and beyond all openvswitch logs have been sent through syslogd and are thus present in /var/log/daemon*