Two wireless link failover

RouterOS Wireless Networking
1

Hi all,

I have to implement the failover on two wireless PTP links. There would be two APs (QRT) and one switch on each side.

So the config would be

Lan
.
Switch
.
Ap1 Ap2
.
.
.
Ap3 Ap4
.
swtich
.
ISP

My plan is to have ap1-ap3 link as a main link and ap2-ap4 as a backup. Since APs on each side would be installed very close one to another I would like to turn off radios of ap2 and ap4 as long as main link is working so there is no interference. I have an idea to do that with netwatch and possible some basic scripting. It’s not critical that backup takes over immediately when the main link goes down so some 10-30s outage is acceptable.
Configuration would be simple then, just bridging, without OSPF, VRRP…

Would you recommend something like this? I would like to see if there are some problems with such configuration that I haven’t considered.

Has anybody done it already? Are there any scripts or examples?

2

Do you expect that the failover will switch back to first link or the backup link remains on forever? I would personally run both links along together and just switch routing to one or to another link if one does not carry data. Or bond them together and use capacity of both.

3

Hello!

You don’t have turn off ap2 and ap4 radios, just set different frequencies so there’s will be no interference. Most important is how far is routers from each other and do you need backup, which band you should use, is there other signals that can interfere yours, is there any obstacles like metallic panels or buildings.

4

Hi,

Just to post the feedback. SXTs were used instead of QRTs, distance is not too big. They’re some 30-40cm apart.
First frequency is 5180, second 5320.
I see no problems when both radios on each side are working.

5

Looks solved. What is the final logic?