The file created to connect the veth to the bridge in https://github.com/juju/charm-helpers/blob/master/charmhelpers/contrib/network/ovs/__init__.py#L35-L40 needs additional lines to deal with networks using differing MTUs. On a jumbo-frame network, the guests connected through the gateway will be unable to receive large packets without adding in:
pre-up ip link set veth-br0 mtu 9000 pre-up ip link set veth-br-ex mtu 9000 pre-up ip link set br0 mtu 9000
The file created to connect the veth to the bridge in https:/ /github. com/juju/ charm-helpers/ blob/master/ charmhelpers/ contrib/ network/ ovs/__init_ _.py#L35- L40 needs additional lines to deal with networks using differing MTUs. On a jumbo-frame network, the guests connected through the gateway will be unable to receive large packets without adding in:
pre-up ip link set veth-br0 mtu 9000
pre-up ip link set veth-br-ex mtu 9000
pre-up ip link set br0 mtu 9000