Wireless FAQ

RouterOS Wireless Networking
1

We made a simple wireless FAQ here:
http://wiki.mikrotik.com/wiki/Wireless_FAQ

let us know if there is anything else that needs to be clarified in a similar way. Note that the full manual is coming also, so this should be kept simple

for suggestions and questions, use this forum, or the TALK page of the wiki. Do not write nonrelated stuff into the article itself.

2

Very useful info!

Thanks!!

George

1 Like
3

Very nice Normis-long time coming.

4

Nice one!! :smiley:

5

Hi,

what about a standard ap/client configuration for WISPs with discussed additions.
There are a lot of things to decide:

  • preferred channel width 5/10/20/40 MHz
  • nstream on/off
  • movement strategy how to change config on all clients of an ap
    (e.g. to switch a non nstream segment to a nstream segment without downtime)
  • rts/cts
  • fast setup of a new assembled clients
  • how to update all clients

So some sort of best practice guide for WISPs.

Stefan

6

I had never compared the frames / hw frames before. I’m noticing the TX comparision follows pretty close to what I expected 1.6 x on a good link, 2.1 x on a not so great link.

However, the RX comparison is way, way out of whack. The RX HW is 2200 x higher on one that I looked at, but always way higher, even on great links.

To determine links, do I need to only compare TX Frame numbers on each end?

Randall

7

Hi
I would like to ask for help guys.

I have a basestation with a RB333 configured with 3xR52 cards for three antennas running on different channels i.e 1,3 and 11. but what happens is that there’s one card that registers 13 client and then it shows that some client’s signal strength has gone up to -110dbm keeps fluctuating and then when I change the TX power to card rate from default it changes for some hours or even days then brings the same signal strength over and over again.

I have tried to upgrade the OS from 3.16 to 3.24 stable version but still without sucess. please assist guys what do I do with the link.

Clients Premises Equipment is NS2.

8

please make a new thread instead of posting off-topic

9

Wow!!! thanks this is awesome!

10

What sort of practical limits apply to the number of clients which can be simultaneously using a single radio card ?

Anyone got any typical numbers ?


Nick.

11

THANKS

12

Appreciated the link. thanks

13

I feel much less noobish now, thanks!

14

is this Hijack thread day or what?

FAQ is nice. Great to see an explanation on this. Would love to see some examples of usage of each feature, for instance, Frame lifetime. --What the value actually represents.. that kind of thing could be useful for tuning links. also things like Burst Time, preamble mode, and noise floor threshold.. some of these are much less well known/documented.

I know however this is supposed to be simplified, but perhaps in the manual would be worth having examples there for each feature. Help people grasp concepts a little better.

-Brad

15

i have similar opinions . i am too confused with NV2 configs and the HT settings HT AMPDU Priorities.

Secondly i want to see good examples of Data Rates configurations.
I thought having fixed data rates to 6 mbps in 5 Ghz band wld actually give me a more robust link but i practically was wrong. The pthroughput went bad and so did the thruput

On the other hand i see a guy who had some config where he had unchecked 6,9,18,24 mbps and had checked the others was having a throughput of 6 mbps. on a 10 km link
More Examples and clarifications please.

16

NV2 is proprietary tdma that works with all 802.11a/b/g/n links. HT and HT AMPDU etc. is only for links with ´n´ (or mimo) availability.
If you can’t find all info of need in MT wiki manual than try to google it. Most technology used in MT-ROs is standard 802.11 technology that has many explanations and white papers explainations on the internet published.

Secondly i want to see good examples of Data Rates configurations.
I thought having fixed data rates to 6 mbps in 5 Ghz band wld actually give me a more robust link but i practically was wrong. The pthroughput went bad and so did the thruput

The ´rule of thumb´ in througput versus data rates is 50% of the data rate is what a one way transmission of user data could be.
If signals are strong enough you should try higher data rates to acheive higher througputs.
Basically the ´best practise´is to find a data rate the link is still stable (doesn’t drop back to a lower level under traffic load conditions) and set that rate as the maximum. Set a 2nd rate one step below and always set the lowest (6mb) to make sure basic rates always connect to have radios speak under all conditions.

NV2 is a little different in that respect that some, including me, on this forum sense it just works better with only one data rate set. Even de basic rate the same as the supported data rate.

On the other hand i see a guy who had some config where he had unchecked 6,9,18,24 mbps and had checked the others was having a throughput of 6 mbps. on a 10 km link
More Examples and clarifications please.

That makes sense: He has 12mb checked and 50% of that is … ? :astonished:

17

i understand that HT and HT AMPDU are settings for Wireless N (Mimo) but the problem is that I am getting a max of 3-4 mbps for less than 2 km link whreas someone in the post has shown me a 90 mbps bandwidth test for similar distance. My LOS is very clear. Frq. is also unused at that locations. I have upgraded the ROS to 5.0 How do increase the bandwidth. even the radios do not connect at more than 54/6 mbps. the 6 mbps by itself keeps changing to 54 mbps and under load the ccq goes down to 6% -10%. Without load I find the CCQ to be 109/97.

18

Well, 90mbps on 2km is possible yes. But to see what your problems is you have to supply much more info. Do an export command in the console for the ap radio and client and copy and paste it in this forum.
Also show us the signals of the registered units.

19

very very good!!
thank you!

20

thank you very much