Hi, I have a link configured (2x 5HPnD, distance 2km) for testing issue. I use the nv2 protocoll, N only, without encryption, both chains activated in routing mode.
When I use the bandwidth test from antenna to antenne it is about 100MBit, so perfect.
Now, when I copy some data or do a speedtest on the internet through the link I only got 9-12 MBit. What is the Problem? Maybe the packetsize? The packet loss is also very high in my opinion.
Can you help me to get the link work with a higher throughput? What is wrong?
Second, do the bandwidth test with Torch running. I watch them from time to time. When I get good results, often my actual speeds are low. I’ve watched the actual download speed hit 10Mbps+ and had the test results show 3Mbps or less.
I had the same problem.
When nv2 is used i cant’t send more then 10Mbit/s i TCP. First bandwitdh test after wlan reconnect is correct 50 Mbit/s in 10MHz channel width but second bandwidth test show max only 10Mbit/s.
I have used ROS 6.20 and wireless-fp. Test is do between 2x sxt.
Interface queue is set to hw-queue-only for eth1 and wlan1, connection tacking is off.
But when I change to nstreme i have 45Mbit/s in TCP test with 1 connection
IMO in nv2 protocol something is wrong in TCP connection
I think I know where the problem comes from: you start from Gigabit ethernet and somewhere on the link you are using Fast ethernet (maybe the end computer). This is a very BIG and OLD ISSUE with nv2 and gigabit that I can’t imagine why it is still here.
Try this setting for every gigabit device on that link to force it into FastEthernet autonegotiation:
So, if you find this useful please everyone write to support@mikrotik.com. They need to resolve this otherwise the gigabit ports are USELESS.
NOT really. It is giving some improvements but is limiting the throughput to 100 Mbps and this BUG applies even for AC devices.
PLEASE write about this to MikroTik, I already did.
So, I’ve found the bug and I still can’t believe. It was like nxl said (thx btw) a link between a switch and the router which was on 100MBit. But why is the throughput only 10MBit?!? After configuring everything on 1GBit everything works excellent.
I know I’m new here but I ran in to these problems before. With different hardware but essentially its the same problem.
The problem exists in the auto negotiation feature. When you have gigabit on one side an Fast Ethernet on the other or even maybe Fast Ethernet on both sides(mostly different hardware) auto negotiation fails. When it fails automatically both sides switch tot 100Mbps full duplex(throughput will be roughly 10 Mbit). When you do a ping test when there is lots of traffic(like a bandwidth test) you see the latency mount up to like 2 seconds and more. After that you get packet losses. When the link recovers you get better throughput and latency and the story starts all over again.
My advice to you: NEVER use auto negotiation in WAN or LAN Backbones. Always set your devices on fixed speed an duplex.
, almost I never use nv2 on p2p links
