Hi,
i’m just fiddling with a RB600 with 1 uplink and 3 Sectors in 5,4GHz.
I put the sectors on the lower end of spectrum and the uplink on the
upper.
I cant get more then 15MBit to a cpe. It often breaks down to 5MBit/s.
Tried 802.11,nstreme,nv2 and each possible setting. Channels are 20MBit.
Cards are R52 and R52n. RO 5.4.
From RB600 and to RB600 I get much better bandwidth but through
the RB600 does not work well.
Anyone managed to get it done reliable and fast?
Thanks,
Stefan
I came to the conclusion a long time ago that fitting multiple cards on same board was a bad idea, and had no success at all running more than 1 card on the same band on the same board.
mixing 2.4 and 5.8 seems that there is no problem.
Since taking that decision never to fit more than 1 card within same band on same board in same enclosure, my problems went away..
I am not the only one with same opinion, Rudy ( I am sure he will comment) took the same decision and also made a great deal of further improvements with topology, and now runs problem free.
However I am sure that there will be some input from others who have managed it, maybe with a careful selection of cards it nay be possible, but mutual coupling and interference does seem to be a problem.
Which leads to to one question for MT, why the new board with 4 slots? It appears to be virtually impossible in the “real world environment” (not test bench) so why bother with this new board?
If you putting in 2 card in the same board, i think you can let it run on the wds-slave.
with this you can share 1 channel with 2 card, but the detail i have not test properly yet, it may seem complicated but can help to save the channel to be use and avoid self interference.
just wonder know, when the mikrotik only can combine few wireless card with can use the same channel.
I’m pretty confident with 2 cards in a single board with the help of a microwave foam absorber ( http://www.wispmax.com/vmchk/34-microwave-foam-absorber-20x20.html )
Remember to close the board and the card in a metallic enclosure to avoid external interferences.
Otherwise go for 1 radio for every board. Links should be all done with 1radio:1board
Then WHY those routerboards come out with a lot of minipci slots?
Because you can fill them with backup radios (keeping them off until needed)
Never a problem here and have had many radios in a board..
as an example… i’ve completed fairly recently, two R52Hn’s in a Rb800 Both dual polarity dual chain. Plastic enclosure.
one is a PTP the other is PTMP. i get 105-110Mbit full duplex on the PTP link, and at the same time, easily see 50-60 megabits of real traffic over the PTMP links.
Frequencies are ~ 80mhz apart, antennas are about 6 inches apart. I can do bandwith tests all day long simultaneously on both cards and see over 200 megabits total on the ptp and 100 megs total
on the PTP.
One of the PTMP links is actually pointing directly at the PTP links antenna on the AP (the ptmp is on the opposite site) and it still works perfect (short link, less than 1/8 mile away)
near perfect Tx/Rx CCQs on everything.
-Brad
I’ve noticed that the RB/SXT’s don’t like to be near other devices however. I think perhaps its the cards you may be using…
as my experience has been perfect with no interference problems.