Hello everyone!
Currently, I'm trying to make my Openwrt (version 19.07.8) router (TP-LINK Archer C7 v5) a controllable SDN switch. I have flashed my router with OpenWrt (19.07.8) and installed OVS with opkg update
then opkg install openvswitch
. Right now I'm just trying to configure my router so that it can still act like a normal router with or without a controller connected. Below is my current config (ovs-br
is the OVS bridge that I have created):
My physical routers set up:
ISP --> (DSL)Router1(LAN) --> (WAN)Router2(LAN) --> (WAN)OpenWrt_OVS_Router(LAN) --> Windows_PC
$ ifconfig ovs-br up
$ ifconfig
br-lan Link encap:Ethernet HWaddr 28:EE:52:62:DB:9D
inet addr:192.168.1.1 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fd24:ca6a:2266::1/60 Scope:Global
inet6 addr: fe80::2aee:52ff:fe62:db9d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:50846 errors:0 dropped:0 overruns:0 frame:0
TX packets:58541 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:11235102 (10.7 MiB) TX bytes:35872392 (34.2 MiB)
eth0 Link encap:Ethernet HWaddr 28:EE:52:62:DB:9D
inet6 addr: fe80::2aee:52ff:fe62:db9d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:116016 errors:0 dropped:0 overruns:0 frame:0
TX packets:108701 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:52277299 (49.8 MiB) TX bytes:47889499 (45.6 MiB)
Interrupt:4
eth0.1 Link encap:Ethernet HWaddr 28:EE:52:62:DB:9D
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:50847 errors:0 dropped:0 overruns:0 frame:0
TX packets:58541 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:11235148 (10.7 MiB) TX bytes:35872392 (34.2 MiB)
eth0.2 Link encap:Ethernet HWaddr 28:EE:52:62:DB:9E
inet addr:192.168.3.25 Bcast:192.168.3.255 Mask:255.255.255.0
inet6 addr: fe80::2aee:52ff:fe62:db9e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:65116 errors:0 dropped:0 overruns:0 frame:0
TX packets:50134 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:38941943 (37.1 MiB) TX bytes:11579792 (11.0 MiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:244 errors:0 dropped:0 overruns:0 frame:0
TX packets:244 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:23587 (23.0 KiB) TX bytes:23587 (23.0 KiB)
ovs-br Link encap:Ethernet HWaddr 62:A1:3F:9B:4E:4D
inet6 addr: fe80::60a1:3fff:fe9b:4e4d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:746 (746.0 B)
wlan0 Link encap:Ethernet HWaddr 28:EE:52:62:DB:9C
inet6 addr: fe80::2aee:52ff:fe62:db9c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:876 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:132233 (129.1 KiB)
$ ovs-vsctl show
d4a99c27-a9ad-4d57-ac81-f83d92e4aaf1
Bridge ovs-br
Port ovs-br
Interface ovs-br
type: internal
ovs_version: "2.11.6"
As this is the first time for me to do something like this, I've got many issues when I was configuring the interfaces and ports for my OVS bridge. I have tried to add eth0.2
which is the WAN interface to ovs-br
and flashed its IP address then add it to ovs-br
, after this I have made my ovs-br
as the default route.
$ ovs-vsctl show
d4a99c27-a9ad-4d57-ac81-f83d92e4aaf1
Bridge ovs-br
Controller "tcp:controller_ip:6633"
Port ovs-br
Interface ovs-br
type: internal
Port "eth0.2"
Interface "eth0.2"
ovs_version: "2.11.6"
$ route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.3.1 0.0.0.0 UG 0 0 0 ovs-br
192.168.3.0 0.0.0.0 255.255.255.0 U 0 0 0 ovs-br
192.168.111.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0.1
However, as soon as I added br-lan
which is the bridged LAN interface to my ovs-br
, I lose connection or access to my router (both ssh and Luci web interface).
Any suggestions on how should I approach this issue? I just want to get the OVS bridge set up successfully (with both LAN and WAN interface connected to the bridge) at the same time I can access the internet like normal.
Much appreciated!