Configuring ovs Remotely

Owned by Tracy Yang (Unlicensed)
Mar 03, 2023
2 min read

Configuring ovsdb Locally

User can check the status of the ovsdb-server process using the ps command from the Linux shell.

admin@PicOS-OVS$ps aux|grep ovs
root      3422  0.0  0.1   7020  2788 ?        S    10:42   0:00 ovsdb-server /ovs/ovs-vswitchd.conf.db /tmp/inventory.conf.db /ovs/function.conf.db --pidfile --remote=ptcp:6640:127.0.0.1 --remote=punix:/ovs/var/run/openvswitch/db.sock --remote=db:Open_vSwitch,Manager,target
root      3435 15.7  1.5 122860 32320 ?        Sl   10:42   2:12 ovs-vswitchd --pidfile=ovs-vswitchd.pid --overwrite-pidfile
root      3494  0.0  0.2  12960  5752 ?        Ss   10:43   0:00 /usr/bin/python /ovs/share/openvswitch/scripts/ovs-invd --pidfile=ovs-invd.pid --overwrite-pidfile --detach --root-prefix=/ovs/
admin     3738  0.0  0.0   2200   684 ttyS0    S+   10:56   0:00 grep --color=auto ovs
admin@PicOS-OVS$

The string '--remote=ptcp:6640:127.0.0.1' in the output above shows that the ovsdb-server is listening the local IP 127.0.0.1 and port 6640. 

User can configure ovs-vswitchd locally as shown below:

root@PicOS-OVS$ovs-vsctl add-br br0 -- set bridge br0 datapath_type=pica8
root@PicOS-OVS$ovs-vsctl add-port br0 te-1/1/1 vlan_mode=trunk tag=1 -- set interface te-1/1/1 type=pica8
root@PicOS-OVS$ovs-vsctl add-port br0 vxlan1 -- set interface vxlan1 type=pica8_vxlan options:remote_ip=10.10.10.2 options:local_ip=10.10.10.1 options:vlan=1 options:vnid=1122867 options:udp_dst_port=4789 options:src_mac=C8:0A:A9:04:49:1A  options:dst_mac=C8:0A:A9:9E:14:A5  options:egress_port=te-1/1/1
root@PicOS-OVS$ovs-vsctl set-controller br0 tcp:10.10.51.51:6633

Configuring ovsdb Remotely

Check the state of ovsdb-server on the switch.

admin@PicOS-OVS$ps aux|grep ovs
root      3422  0.0  0.1   7020  2788 ?        S    10:42   0:00 ovsdb-server /ovs/ovs-vswitchd.conf.db /tmp/inventory.conf.db /ovs/function.conf.db --pidfile --remote=ptcp:6640:127.0.0.1 --remote=punix:/ovs/var/run/openvswitch/db.sock --remote=db:Open_vSwitch,Manager,target
root      3435 14.9  1.5 122860 32388 ?        Sl   10:42   3:16 ovs-vswitchd --pidfile=ovs-vswitchd.pid --overwrite-pidfile
root      3494  0.0  0.2  12960  5752 ?        Ss   10:43   0:00 /usr/bin/python /ovs/share/openvswitch/scripts/ovs-invd --pidfile=ovs-invd.pid --overwrite-pidfile --detach --root-prefix=/ovs/
admin     3835  0.0  0.0   2200   680 ttyS0    S+   11:04   0:00 grep --color=auto ovs

The string '--remote=db:Open_vSwitch,Manager,target'  in the output above shows that the ovsdb-server is listening remote Manager and target default. User can configure switch ovsdb at remote side.

User can configure ovs-vswitchd remotely as shown below, switch's managerment ip is 10.10.51.138.

root@dev-42:~# ovs-vsctl --db=tcp:10.10.51.138:6640 add-br br0 -- set bridge br0 datapath_type=pica8
root@dev-42:~# ovs-vsctl --db=tcp:10.10.51.138:6640 add-port br0 te-1/1/1 vlan_mode=trunk tag=1 -- set interface te-1/1/1 type=pica8
root@dev-42:~# ovs-vsctl --db=tcp:10.10.51.138:6640 add-port br0 vxlan1 -- set interface vxlan1 type=pica8_vxlan options:remote_ip=10.10.10.2 options:local_ip=10.10.10.1 options:vlan=1 options:vnid=1122867 options:udp_dst_port=4789 options:src_mac=C8:0A:A9:04:49:1A  options:dst_mac=C8:0A:A9:9E:14:A5  options:egress_port=te-1/1/1
root@dev-42:~# ovs-vsctl --db=tcp:10.10.51.138:6640 set-controller br0 tcp:10.10.51.51:6633


Add flow locally

User can add flow entry in switch cli.

 

admin@PicOS-OVS$ovs-ofctl add-flow br0 in_port=31,actions=output:32
admin@PicOS-OVS$
admin@PicOS-OVS$ovs-ofctl dump-flows br0
OFPST_FLOW reply (OF1.4) (xid=0x2):
 flow_id=29, cookie=0x0, duration=3.313s, table=0, n_packets=n/a, n_bytes=3481169152, in_port=31 actions=output:32
admin@PicOS-OVS$


Add flow remotely

User can add flow entry at remote side, and must configure controller before, switch's managerment ip is 10.10.51.138.

Switch,
admin@PicOS-OVS$ovs-vsctl set-controller br0 ptcp:6633:10.10.51.138
 
Remote server,
root@dev-42:~# ovs-ofctl add-flow tcp:10.10.51.138:6633 in_port=32,actions=output:31                  
root@dev-42:~#

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