I'm doing some testing with RB433AH's, 2 XR5 cards in each, running ROS 4.16 with the wireless-nv2 package. There is no "nv2 dual slave" mode option for the wireless cards. Is this something that is yet to happen, or does it have to be nstreme? Or will it automatically run nv2?

bump - me too!

You can simulate the full duplex nature of nstreme-dual with ospf:

http://gregsowell.com/?p=2493
http://stfunoo.be/?p=696
http://blog.butchevans.com/2008/10/usin ... ess-links/
http://wiki.mikrotik.com/wiki/Dual_Setup_with_OSPF

A single radio failing with nstreme-dual means the whole link is down.

Bump - thanks for that but my original question remains unanswered...

nstreme-dual interface doesn't support Nv2 protocol.

Thank you, thats what I wanted to know.

Also for me nv2 wireles protocol doesn't work (SXT 5HnD) so I must use any.

Maybe we want NV2-Dual option, that's same as the nstreme-dual but with nv2. It would be very good. Any plans on this, Mikrotik?

Maybe we want NV2-Dual option, that's same as the nstreme-dual but with nv2. It would be very good. Any plans on this, Mikrotik?

I believe that question already has been answered negative.
nstreme-dual is a passed station anyway for any serious network builder. Examples are given to do it better or make ´n´ links. This last has at least all the advantages you look for in nstreme-dual but with only one radio card.

....This last has at least all the advantages you look for in nstreme-dual but with only one radio card.

Does it mean NV2 only uses 1 polarity antenna, while i see many TDMA feature enabled devices use dual polarity antenna that use 2 radio cards.

....This last has at least all the advantages you look for in nstreme-dual but with only one radio card.

Does it mean NV2 only uses 1 polarity antenna, while i see many TDMA feature enabled devices use dual polarity antenna that use 2 radio cards.

No, nv2 has nothing to do with how your antenna setup is.
I think your are mixing things here.

We have normal 802.11 radio links.
Then MT developed their nstreme protocol to get some extra out of a link.
Now both are sort of replaced with (best of both worlds) nv2
What MT calls "nv2" is what UBNT is calling "Airmax" and although both use TDMA they both use their own specifics and they are therefore also not interchangeable. (Other brands already use TDMA somewhat longer I believe, like Motorola's Canopy system....)

Apart from this,
You can have two bonded radio channels to create a double capacity 50% redundant fail-over link. On both ends two antenna's with their own radio are needed both working in different radio channels, not necessarily on different polarities. If one antenna link goes down means we still have 50% left.
Than there is nstreme-dual. It works with one radio channel of one nstreme enable card, but with two antenna's on each side. On each side one antenna is sending and one is transmitting. This way you have a full duplex system. But, if one antenna goes down, the whole link is down.
And now we have ´n´ protocol or mimo. It uses one ´n´ enabled radio on each end but when in use with two antennas' (so one radio connects to two antenna's (or 3 or more in very specialised setups) a theoretical throughput of 300Mb can be achieved.
Although the ´n´ radio uses only one channel, because it is 40Mhz wide it actually consumes two. (side by side channels)

Compared to bonding ´n´ has higher throughput. But bonding still has the 50% redundant advantage.
n-streme dual can have slightly higher and more stable throughput then a bonded link but will never be able to reach throughputs as ´n´ links. That's why it probably will be faced out since there are better ways of doing things....

nv2 is just a different protocol on how radio's communicate. It can be used on single 802.11, bonded and ´n´ links. Only not on nstreme because nv2 actually replaces some of the nstreme working principles by new, better, ones.

I have several single radio links running with nv2 (thus only one antenna on each side).
But I also have two ´n´ links and only on one I have nv2. Off course here I use dual antennas.

To make things even more complicated. ´n´ protocol links can also be single antenna links. Only the theoretical maximum throughput is also half of that when two antenna's (with 40Mhz bandwidth) were used.

Are things a bit more clear now?

@WirelessRudy
Yes everything is clear!
Big thumbs up for the great explanation thank you.

i like to provide ptp link for commerical customer within 1-3 kms distance of load upto 2mbps
is it is possible with sxt or else 711?
my reseller said sxt not withstand weather conditions is it is true?

It's an outdoor unit. I wouldn't see why a reseller then says its not fit for that? Personally that shows his lack of knowledge/interest in the product he is selling.

1-3kms distant with only 2Mbps sounds like no problem to me. I am planning to use these units for links upto 5km with speeds that have to be at least 6Mb. (5Ghz band)

Dear ,

Regarding NV2 support only SXT-5ND and also card R52HN coz this card support n-mode , so nv2 work good with card R52HN, but use card XR5 and use NV2 not support coz this card XR5 work 5G only not work n-mode ..

i like to provide ptp link for commerical customer within 1-3 kms distance of load upto 2mbps
is it is possible with sxt or else 711?
my reseller said sxt not withstand weather conditions is it is true?

You might want to start a new thread when you ask a new question. Its forum etiquette and will get your question answered faster...

lucky for you though Rudy was right on it I have 5km PTMP with AP pointing the wrong direction for a client (personal network) and i get about 15 megabits.