Hi,
I am building a new wireless network as shown in diagram attached:
I chose RB800 with R52Hn for point to point link sectors 5GHz. I am planning to use RB433 with R52Hn for access points/backhauling which are going to be below 4km from base stations.
Qestions:
I am new to mikrotik, Is my diagram cost effective/correct for 100Mbps traffic?
What kind of antenna should I use, and where to find them.
Is there any other idea to implement this kind of network?
It is no good idea to use a board with more than one wireless card. It works but gives low performance.
Even using cheap RB-SXT you get better isolation/performance as you’re able to separate them.
If 100MBit/s is enough you can feed them with RB750UP or Omnitik UPA.
You can reduce interference/improve signal/performance using some higher gain Antennas with compartement from
e.g. Mars or MTI putting 912 Board inside.
Hi ste, im the same team with SYS, but in the selection guide the board you mentioned SXT is not backbone board, not heavy load AP ,and with low memory, my be can you elaborate why we have those card ( RB800,RB433 etc ) with all these, backbone capability and Heavy load multi AP useless, why manufactured with all specs but with poor performance, i think there should some means of making them perform …
Wireless is like audio. It does not help to put a lot power inside without good cables and speakers. Putting 2 Wireless cards into a RB800 you are putting them close together so they can interfere themselfes at a high level. Just do a test and configure one card as AP and connect the second as client. Just look at the signal levels and you’ll understand.
You can reduce the problems by separating frequencies but this is not 100% possible in the same band. If you plan to use different bands in the same RB800 this is another story.
So you’re better off using 2 SXTs at a site than one RB800. SXT is fast enough to handle 100MBit/s and has enough memory to do OSPF. Of course you can put 2 RB800s at the site and get more CPU-Power. But this may be a waste of money when SXT can handle the traffic.
SXT is not optimal in the sense of Antenna pattern and backward isolation as it has only 16db Gain and a plastic housing. So using RB912 in a metal case on the back of a high gain antenna is way better. We use compartement Antennas as there ore only two short pigtails on the signal path and this is within a metal enclosure. Again think of audio. Quality of the signal path is the first to look at. A big cpu does not help when there are retries/low modulation on the wireless due to bad/disturbed signal.
if u use the RB800 you can have no issue at all when the traffic is heavily on the tcp protocol…
the rest of the board is not really perform well when you customer have concern on the link latency…
putting more than 1 card into the RB800 is not the good idea, even you can save money and save you maintenance but the performance will show you what’s the difference if you test it out…
Thanks veterans for showing the road to success,
But little Confusing, why should i have rb800 and use only let say one pci slot and left the other slot empty because im afraid to degrade performance, cause the idea is we select rb800, because is the one of the board having our requirements, like rb435g, and rb493g, these three cards is our choices based on wireless backbone, gigabit eth, heavy load multi AP, heavy load eth. router and etc, the latency ofcourse is an issue, and we consider for quick future expansion, of more access points and bandwidth, so that at that instance of heavy traffic which we can not predict , may need to expand one month after installation, so we need to have the board that well ready for expansion and coverage extension without replacing the all hardware with new one, that is what I think was the idea behind manufacturing of these card, it obvious will use frequency spacing if we use for one frequency let say 5ghz as bacbone and mix of 5ghz as backbone and 2.4ghz for CAP (customer access point), cause the issue sometimes is not how much you spend today , is how much you gonna spend tomorrow if…, what if I use metal insulation tape to avoid intercard interference, or may be you need to convince more why these are useless to their capacity, unless mikrotik they have to admit this problem and give alternative on that capacity!
