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Then I intend follow Larsks ( who is the best tutor either he wants it to happen or doesn't) , i mean his work :-
Connectivity between the qg-... interface and the appropriate external bridge (br-ex1 in this case) happens due to the VLAN tag assigned on egress by the qg-... interface and the following OpenFlow rules associated with br-ex1: # ovs-ofctl dump-flows br-ex1 NXST_FLOW reply (xid=0x4): cookie=0x0, duration=794.876s, table=0, n_packets=0, n_bytes=0, idle_age=794, priority=1 actions=NORMAL cookie=0x0, duration=785.833s, table=0, n_packets=0, n_bytes=0, idle_age=785, priority=4,in_port=3,dl_vlan=4 actions=strip_vlan,NORMAL cookie=0x0, duration=792.945s, table=0, n_packets=24, n_bytes=1896, idle_age=698, priority=2,in_port=3 actions=drop Each of these rules contains some state information (like the packet/byte counts), some conditions (like priority=4,in_port=3,dl_vlan=4) and one or more actions (like actions=strip_vlan,NORMAL). So, the second rule there matches packets associated with VLAN tag 4 and strips the VLAN tag (after which the packet is delivered to any physical interfaces that are attached to this OVS bridge).
Putting this all together:
. . . . . . . The packet exits the qg-... interface of the router (where it is assigned the VLAN tag associated with the external network). (N) The packet is delivered to the external bridge, where a flow rule strip the VLAN tag. (P) The packet is sent out the physical interface associated with the bridge.
It appears that on RH clones (specifically on HA\Keepalived 3 Node Controller Cluster) which always need ifcfg files for OVS port and OVS Bridge, the best configuration would be provided by
cat <<EOF > /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 ONBOOT=yes DEVICETYPE=ovs TYPE=OVSPort OVS_BRIDGE=br-eth0 ONBOOT=yes BOOTPROTO=none VLAN=yes MTU="9000" NM_CONTROLLED=no EOF cat <<EOF > /etc/sysconfig/network-scripts/ifcfg-br-eth0 DEVICE=br-eth0 DEVICETYPE=ovs OVSBOOTPROTO=none TYPE=OVSBridge ONBOOT=yes BOOTPROTO=static MTU="9000" NM_CONTROLLED=no EOF
When "externalnetworkbridge" is unset (ie. ""), Neutron places the external interface of the router into the OVS bridge specified by the "provider_network" provider attribute in the Neutron network. Traffic is processed by Open vSwitch flow rules. In this configuration it is possible to utilize flat and VLAN provider networks.
Asked: 2015-11-24 15:20:38 -0500
Seen: 200 times
Last updated: Nov 25 '15