Comment 7 for bug 1832021

The issue appears to be that ovs_use_veth=True was set to true in dhcp_agent.ini. This causes the qdhcp namespace to be connected to the bridge via a veth pair. This appears to leave checksum offloading enabled on the device in the qdhcp namespace. Manually turning off tx-checksum-ip-generic appears to fix the issue but for a permanent fix switch ovs_use_veth to False.