Oh NO! Another Newbie with a 112 board!

RouterOS General
1

I’m new, but kinda smart :slight_smile:

I have created a simple bridge with the instructions on creating a simple bridge, HOWEVER…

First my goal / network setup.

I want to network two locations, and keep them on the same subnet for ease of use.
The link is 15 Km’s,and I have a Ubiquiti XR5 card in a RB 112 on each side when I install the hardware. And 23 dBi Arc Wireless panel antena’s.

I have “bench tested” the bridge in the office, and these are my issues..

Running a bandwidth test I get about 11Mbps as a max. The CPU load on the RB is 60 - 65 %. (this was Pc - RB -RB - PC test)
When I test RB to RB, i get 24 Mbps

I understand that the RB112 has a weak processor, but I only see it at 65% and 11Mbps, is it possible to get anything more then this? Again this was with the units in the same office. I also tried to manually set the TX levels from 1 DB to 28DB, same speeds.

I would like to see at least 18MbpsTCP ( Understanding that the link/distance/etc are all varialbles, but in the same room I should get better.

Other things I am not if I should use are Nstream, 5, 10, 20. or 40 Mhz channels. ALl of which I tried and the 11Mbps was when it was in 40Mhz and nstream.

I have had problems with the 112 rebooting as well, and can’t figure out why, but seems to not reboot when the card settings are at lower power levels.

Thanks for any help/suggestions.

p.s. I have read alot of posts and seems as if the 112 can get faster rates, but I might be missing something. No other things are running, with the exception later of 1 queue for one VoIP phone based on IP address.

2

Evening, BobcatGuy -
I’m a newbie, too, and have had a pair of RB112 boards and the 400mW Senao radios now for about 2 weeks. The first bandwidth-test that i ran on 20MHz channel, didn’t matter what power (anything seemed good enough, over 700 feet LOS distance and significant antenna gain, gave me on average 19.4Mbps. It’ll keep this up for hours. Rates are the default ones (so up to 54Mbps). The processor loading is about 60% during this.
I’m currently running 5MHz wide channel, maximum rate of 24Mbps, and get an average of 4 Mbps. Methinks I will be using the 5MHz channels going forward since I need SNR more than I need raw data rate.
We’re going to try our first real link next weekend, it’s 21km, about a 3000’ elevation difference between ends, clear shot, 27dBi antennas both ends. Hoping that we’ll have good luck.
Cheers - Jon

3

Whn you were testing the speeds, did you test UDP, or TCP, and id you do it from PC to PC, or RB to RB. When I test RB to RB with UDP, I get 24Mbps, but when it is PC to PC through the RB’s I get 11 and recently up to 12.

How do you have the devices connected? Bridged WDS, or Client and AP?
Do you have anything else running, such as Routing, other bridges, NAT, Logging, etc?

4

I was using the built-in Bandwidth-server/test function - I believe that’s UDP packets. Was doing the test from RB to RB, telnetting into each from a computer.

Setup was computer A to RBa on eth1, then wlan1 via WDS to wlan1 on RBb, then eth1 to computer B. Both computers were in the same subnet as was the eth1 on each routerboard, and the wlan1 links were in the 10.0.1.0/30 subnet.

I have not tried a computer to computer speed test yet. I am having some asymmetry problems right now with the built-in tests, and suspect their performance. Maybe I’ll break out the IXIA testware and see if I get similar results.