Connecting two Sites over L2 Ubiquiti Antennas

l4zz4r0

Hi there,
I need some help to create a failover configuration between two remote company sites actually connected with radio link (ubiquiti L2).

Actual scenario :

SITE A -> L2 Ubiquiti Antenna -><- L2 Ubiquiti Antenna <- SITE B
SITE A NETWORK (192.168.0.0/24) SITE B NETWORK (192.168.0.0/24)
Both sites rely on the same network range.
all works fine

Now I would like to install a second backup antenna and this would be the configuration I would like :

SITE A -> pfsense box -> MAIN L2 Ubiquiti Antenna -><- MAIN L2 Ubiquiti Antenna <- pfsense box <- SITE B
SITE A -> pfsense box -> BACKUP L2 Ubiquiti Antenna -><- BACKUP L2 Ubiquiti Antenna <- pfsense box <- SITE B

I know I need two pfsense box, one for each site.

But I don't know how to configure them exactly...they must make the network transparent to each SITE and provide failover mechanism.
Maybe a bridge ? and then configure failover ? The hard part for my knowledge is not the failover mechanism (I already configured other pfsense box for this kind of purpose) but how configure pfsense boxes to bridge two sites and make same network transparent for both as actual scenario do.

Please help

Regards

stephenw10

Unless you need to filter across that link you're probably better off using switches there.

You can't use the regular WAN failover for that setup because pfSense has to route between those and that can't happen at layer 2 (same subnet). So you need to setup the two links as a lagg. Then bridge that lagg to the local network at both ends so it's all one large layer 2. It's possible to do that in pfSense but a switch that supports lagg would also do it and be waay simpler to setup.

What you should really do though is renumber one side so they don't use the same subnet.

Steve

l4zz4r0

@stephenw10 First of all thank you so much for your kind reply.

Actually on SITE A I have a HP 2530 ARUBA switch and one antenna connected to port 48.

On SITE B I have a 2540. ARUBA switch and one antenna connected to port 1.

I haven't connected the other 2 antennas yet

I know switches support link aggregation and bridging.

Do you have an idea how to create all this via cli ? Or if you know a good online tutorial ?

Regards Steve

stephenw10

No, not on Aruba. But it's probably not difficult. The only question would be if the wifi link devices are truly transparent layer2 and can pass LACP packets.

If you really need one giant subnet between both sites I would try that first.