huh, I love the Forum - you can learn many new things from users when you must learn it from developers =) Normis, please add it to the changelog? 
do you see something that is not in the manual?
argh, sorrrrry, overworking is killing my attention %(
I am subscribed to WiKi pages but never receive e-mail notifications that hey were edited
Hi …
I was running 5.7 on a RB433 + R52nM(PMP) + XR9(PTP) where the ETH is tied to an EOC1650 working as AP for 5 customers (sort of direct access with their laptops, tablets, etc). All natted, PMP & ETH have different IP ranges.
DHCP on ETH stop leasing from time to time (time seems equal to dhcp lease time, 24h in this case).
Was enough to wake it up back reboot the 1650 or disable / enable 433 eth (e.g. any change on ETH status).
Downgraded to 5.6 => no more problems.
Regards;
I’m still having DNS problems. The service DNS seems to stop working. In tools > profile, seems right but the DNS cache list gets empty and stop caching and resolving host.
The only way to fix it is rebooting the RB1200.
tamahome, did you try the latest 5.8 pre-release version ?
sorry if this has already been discussed, but does anyone know why wireless signal drops almost 10db when upgrading from 4.2? I have a PtP link I upgraded today, was at -61db, using 2x2 Mimo with SR71-15 cards. Signals on BOTH chains -60/-61, after the upgrade all the way to 5.7, AND bios update, the signals are now -74/-76 , I’ve checked and all the wireless settings are the same, nothing changed other than firmware update. what’s the deal??? I’ve had this happen on 4 different PtP links now. I’m only upgrading cause I want NV2, but why such the sacrifice in signal?
Where is possible to download these pre-release versions?
And what if you raise the tx power, does go back to normal?
pre-release version - tell MT support via e-mail what your issue is and they should give you the link
NV2 is TDMA not OFDM and is good for PtMP links where you have a lot of noise, but for PtP links without a lot of noise just use nstreme. It has more throughput and less latency.
Please check TDMA and OFDM with wikipedia.
NV2 is TDMA on top of OFDM and nv2 does not perform
better with noise. It performs better than nstreme where
there is no noice as it needs no polling. Instead it uses a
Map like wimax where the AP tells all CPEs at once when
to send. With noise I see 802.11 perform better then nstreme
and better then nv2.
Wrong. NV2 has WAY more throughput than Nstreme, on 3 links already, that were short distance, 2X2, I was only able to get a steady 216x240Mbps. Turning on NV2 now its a rock-solid 300x300Mbps, and I can push almost twice the throughput on bandwidth tests, up to 210Mbps. Your right about latency though…
OK, this is my field experience. I use RB711 so single chain only, on a tower with a lot of Radio and TV stations, some of them with Mega Watts of power so I guess its a pretty “noisy” place . The PtP link is with Signal levels around -60dB, Noise level -110 dB ??? as reported from RB711, 13km perfect LOS, ROS 4.17 to 5.5 all the same. Tested on various frequencies range from 5000 to 6000 MHz.
-with Nstreme: Initially link is OK, data rates 150/150Mbps, CCQ 90-100%, Bandwidth test shows around 100Mbits UDP. The problem comes when real traffic is passed, around 20-30Mbits of traffic, CCQ starts to drop below 50%, data rates also drop below 54Mbps, ping goes high and that’s about it. No more than 30Mbits throughput.
-with NV2: Initially the same conditions as with Nstreme, data rates 135/135 Mbps. When real traffic is passed, CCQ also drops but stays around 60-70%, data rates 81/108 Mbps and around 60Mbits total throughput.
So NV2 performs better then Nstreme in this kind of “noisy” situation. The question is WHY?
When I applied diplexers on both sides, with 100MHz channel, so say only 5700-5800 MHz range is passed, everything else is heavily attenuated, the same link is now working with Nstreme with 90% CCQ, data rates 121/135Mbits, 80Mbps throughput. I haven’t change anything, all the same, Routerboards, pigtails, antennas, cables only difference are applied filters.
I don’t know, maybe I’m missing something here but that’s the results from real traffic not UDP Bandwidth test.
One thing I have noticed, NV2 usually performs better on dual-chains, it seems running 2 chains creates some sort of self-interference with Nstreme, and sometimes I get worse data rates with 2 chains then single. However, activating NV2 makes 2 chains work together much better. My experience, single chain = Nstreme, Dual Chain = NV2.
I have not tried 5.8pre, I’m still waiting for the final version to see if it is a bug.
good morning everyone,
I own a 1100 with RB ros 5.7
The CPU is constantly at 100%, the profile indicates that the DHCP module is consuming 85%.
On the DHCP Client, it is installed but there is no interface added to it.
[xxxxx @ xxxxxx> ip dhcp-client print
Flags: X - disabled, I - invalid
INTERFACE ADDRESS USE ADD STATUS
[xxxxx @ xxxxxx]>
DHCP logs are common.
In my case, I have a RB in 1100 with 2 vlans DHCP and both are active.
Still, my CPU is constantly at 100% and in profile, the DHCP module is usndo 85% to 90% of the processing. 
Well test the 5.8 pre-release already?
DO NOT USE these unless you are prepared somehow to fix your network quickly as these may even brick your device - neither I nor anyone takes responsibility of what happens if you use these test versions
I have put them on many routers except powerpc and so far all 5.8 test versions worked without major issues but I still can not guarantee that your network will be just fine.
These files change from time to time - I download regularly and compare CRC32. When uploaded to a router you also see the date the package was put together.
http://www.mikrotik.com/download/share/routeros-x86-5.8.npk
http://www.mikrotik.com/download/share/routeros-powerpc-5.8.npk
http://www.mikrotik.com/download/share/routeros-mipsbe-5.8.npk
http://www.mikrotik.com/download/share/routeros-mipsle-5.8.npk
If you use User-Manager package DO NOT UPGRADE as you will need that package as well - ask support for 5.8 version of it for the platform(s) you use
If you notice any issues - get supout.rif from router and maybe a screenshot and send to support.
Will there be implemented in the new version of the chipset support Intel H61?