Mikrotik G to N

[RVQ]

Hi Guys

I'm looking to upgrade a wifi link between two buildings.

We currently using 2 x Mikrotik 112 routerboards with 2.4ghz 54mbs atheros g mpci cards. The speeds average at around 2.5 MB/s at the moment.

We looking at getting the 433UAH with the R52N mPCI card and two antennas.

Will there be a major improvement in speed? idea what we can expect?
Is 5.4 ghz wireless N a good idea?

Thx
RVQ

 

[kilos]

How afar are they apart ?
Do you have clear LOS ?
What is the tx/rx signal ?

5.8Ghz should offer better speed as it is less congested with interference than 2.4 Ghz- cordless devices, bluetooth, microwave ovens, 802.11b/g WLAN
Dual nStreme offers faster rates with dual radio card and antennas, need a faster CPU

 

[RVQ]

About 120 meters
Yes, clear LOS
Need to confirm

I read that there are problems with dual nStreme on N at the moment

 

[kilos]

You should connect at 28 Mb/s over that distance.

What is your signal strength as it might be too strong ? and you might have to drop the power slightly
What antennas are you using ? 12dB flat, 24 dB Grid

 

[RVQ]

Will arrange to go check the signal this evening and test dropping the the power.
Antennas are pretty small, 7/8dB flat.

The problem seemed like it was the processing power on the RB-112, the CPU was maxing out during peak traffic hours. I ended up having to downgrade to the latest version 2 of RouterOS, disabled the firewall logging and removed any unused modules. That then gave me the 2.5MB/s I'm getting now.

 

[fragtion]

The problem seemed like it was the processing power on the RB-112, the CPU was maxing out during peak traffic hours. I ended up having to downgrade to the latest version 2 of RouterOS, disabled the firewall logging and removed any unused modules. That then gave me the 2.5MB/s I'm getting now.

I may be wrong, but I don't think you're going to get more than 2.5MB/s with an RB112, even if you switch to Wireless-N. Perhaps move to RB433?
Also, how far is the link? Wireless-N will only make much of a difference for short distance links, like less than 2km or so, as far as I know

 

[kilos]

Look at point 1 and then 2 upgrade the RB
1) The lower the signal strength the lower the TX/RX rates, possibly that your problem as well as interference
What make & model of mini PCI are you using ?
2) CPU maxing out as fragtion mentioned rather use the new RB 433 that you proposed

 

[RVQ]

a. Few hundred meters apart so distance not an issue
1. Signal strength is -44
b. Atheros AR5413 mPCI
2. Looking at replacing just the boards for now. That anyways means boards, mounting and power supply

 

[Atti2de]

As you are aware, the max speed over the N cards is approx 150mbps per antenna. The ethernet ports on the RB400's series have a max speed of 100mbps. Using RB600A's each side, you can use the gigabit ports on these routerboards, allowing you to actually use the full 300mbps/ 450mbps.

But this will only be realised by using at least two antenna's, one horizontally polarised, another vertical. If I'm not mistaking, ProtZkroG mentioned something about a 2-in-1 flat panel solution from Miro.

120m is not a problem - considering that I was running my N-link over 4.5km. My problem was the fact that I was using a RB433 and a single antenna. This is obviously not ideal, but do-able.

Turning up the power to max doesn't help anybody, especially you. Turn down the TX power both sides, especially if you that close.

 

[kilos]

a. Few hundred meters apart so distance not an issue
1. Signal strength is -44
b. Atheros AR5413 mPCI
2. Looking at replacing just the boards for now. That anyways means boards, mounting and power supply

Signal strength is great, must be interference
What is your noise level like ?

Depending on the above if noise level is high
Solution 1
Try and purchase the wireless kit with the understanding if does not work you can return it.
Go for 5.8 Ghz antenna and CM9 radio cards. (might only work with newer revision RouterOS)

Solution 2:
Upgrade Routerboards & above