ARP Flux can cause confusion to some 10G switches when using jumbo frames causing network traffic to stop.

Workaround: disable ARP flux on the affected server. If the interfaces are all on different sub-networks, run the following command:

# sysctl -w net.ipv4.conf.all.arp_filter=1

If some of the interfaces are on the same sub-network, run the following commands:

# sysctl -w net.ipv4.conf.all.arp_ignore=1
# sysctl -w net.ipv4.conf.all.arp_announce=2

If you wish to make these changes permanent, add the relevant ARP parameter settings to /etc/sysctl.conf:

net.ipv4.conf.all.arp_filter=1
net.ipv4.conf.all.arp_ignore=1
net.ipv4.conf.all.arp_announce=2

Bug 17982926