On Sat, Mar 23, 2019 at 5:28 PM wenxu <we...@ucloud.cn> wrote: > > On 2019/3/23 下午3:50, Pravin Shelar wrote: > > On Thu, Mar 21, 2019 at 3:34 AM <we...@ucloud.cn> wrote: > >> From: wenxu <we...@ucloud.cn> > >> > >> There is currently no support for the multicasti/broadcst aspects > >> of VXLAN in ovs. In the datapath flow the tun_dst must specific. > >> But in the IP_TUNNEL_INFO_BRIDGE mode the tun_dst can not be specific. > >> And the packet can forward through the fdb of vxlan devcice. In > >> this mode the broadcast/multicast packet can be sent through the > >> following ways in ovs. > >> > >> ovs-vsctl add-port br0 vxlan -- set in vxlan type=vxlan \ > >> options:key=1000 options:remote_ip=flow > >> ovs-ofctl add-flow br0 in_port=LOCAL,dl_dst=ff:ff:ff:ff:ff:ff,\ > >> action=output:vxlan > >> > >> bridge fdb append ff:ff:ff:ff:ff:ff dev vxlan_sys_4789 dst 172.168.0.1 \ > >> src_vni 1000 vni 1000 self > >> bridge fdb append ff:ff:ff:ff:ff:ff dev vxlan_sys_4789 dst 172.168.0.2 \ > >> src_vni 1000 vni 1000 self > >> > > This would make datapath bit complicated, can you give example of such > > use-case? > > > > There is currently no support for the multicast aspects > of VXLAN in ovs. > With this patch we can achieve this through the fdb of the lower vxlan > device. You can create multi vxlan device in the ovs for example: ovs-vsctl add-port br0 vxlan0 -- set in vxlan0 type=vxlan options:key=1000 options:remote_ip= 172.168.0.1 ovs-vsctl add-port br0 vxlan1 -- set in vxlan1 type=vxlan options:key=1000 options:remote_ip= 172.168.0.2
so the ff:ff:ff:ff:ff:ff packets will be send to vxlan0 and vxlan1 ports. > For example. three severs connects with vxlan. > server1 IP 10.0.0.1 tunnel IP 172.168.0.1 vni 1000 > server2 IP 10.0.0.2 tunnel IP 172.168.0.2 vni 1000 > server3 IP 10.0.0.3 tunnel IP 172.168.0.3 vni 1000 > > All the broadcast arp request from server1, can be send to vxlan_sys_4789 > in IP_TUNNEL_INFO_BRIDGE mode. Then the broadcast packet can send through > the fdb table in the vxlan device as following: > > bridge fdb append ff:ff:ff:ff:ff:ff dev vxlan_sys_4789 dst 172.168.0.1 \ > src_vni 1000 vni 1000 self > bridge fdb append ff:ff:ff:ff:ff:ff dev vxlan_sys_4789 dst 172.168.0.2 \ > src_vni 1000 vni 1000 self > > > Not any for multicast case. This patch make ovs vxlan tunnel using the fdb > table of lower vxlan device. > > _______________________________________________ > dev mailing list > d...@openvswitch.org > https://mail.openvswitch.org/mailman/listinfo/ovs-dev
