Problem with ethernet speed

RouterOS General
1

Hi all.
I have problem on the tower where my equipment is set up. About 1m from my equipment is FM radio antenna (93MHz) and I can’t get ethernet speed more then 10mbits. Everything is grounded well. Any sugestions?

2

I would do a bandwidth test between each interface. I would determine the throughput of the wirelss link without consideration of the Ethernet link and the Ethernet links without consideration of the wireless link. I would suspect that you will find that the issue is either a bad power injector or a wireless issue. I doubt that you are having any issues related to the FM tower. We have equipment running close to AM and FM towers without problems.

3

Hi. I replaced every single piece of equipment and the problem is still here. Interesting thing is that wireless is working flowlessly but ethernet just wan’t get higher then 10 mbits.

4

Does the status tab on the Ethernet interface show that it is connected at a higher rate then 10bt? Is it taking errors?

5

Hi. No, status show 10Mbps rate (auto negotiation) and no drops or error packages. If I set ethernet to 100Mbps with auto nagotiation turned off, link doesn’t come up.

6

Here is someone who had a similar issue and fixed it by moving the Ethernet cable “a couple of meters away”.
http://forum.ubnt.com/showthread.php?t=24918

You said your about “1m” from the FM. Honestly I first though that that was 1 mile but I am now suspecting that you meant one meter. I have equipment less then one mile from AM/FM which is why I thought RF interference but if you mean 1 meter then your working with something outside of my experience.

7

Yes, My antennas are just one meter from FM antenna. Anyone else have some advice?

8

You have definitively interference problems with FM.
you must be shure of:

  1. you use a shielded ethernet cable
  2. you use a metal case routerbord
  3. the grounding of antenna+radio case+ethernet shield is perfect
  4. the power is filtered from 100MHz

otherwise, you must use fiber optic or move away your radio

9

In the last MUM in Warsaw We could appreciate an already done fiber solution for Mikrotik. Very nice. http://www.nimwave.com/index.php/prodotti/outdoor/72?task=view