Big problems with throughput

RouterOS Wireless Networking
1

Ok for the past few days my network has been plagued with throughput problems. I have been slowly migrating all of my equipment from WRAP with StarOS to RB600 and RB433 with Mikrotik OS on them. All of my PTP links are 5GHz mainly using SR5s and XR5s. Some of my links started crapping out when sending a decent amount of traffic through them. Anywhere from 4-7Mb is when it will start. Ping times raise and bandwidth decreases tremendously. I’ve replaced everything on all sides: N-Pigtail, In-Line Lightning arrestor, LMR400, Cards, and nose cones. I have no idea what else it could be. Everything works as it should until you get that traffic through it. This is happening on multiple links and it leads me to believe it’s not something physical but a configuration problem. I’ll focus on one link for now. It’s at a -49 and is talking at 54/54. The ACK is set to dynamic (although I have tried defining it with no improvement) on this side and for the other side is a StarOS WRAP with a link distance of 5 miles. I’ve tried changing AP/Station and vice versa. I’m using channel 5805. I’ve tried many channels with no better. And because I know someone will ask it I do know for sure these cards and antenna’s are capable of the 5.8 range.

Ping times are horrible.

Reply from XX.XX.XX.XX: bytes=32 time=1276ms TTL=62
Reply from XX.XX.XX.XX: bytes=32 time=1359ms TTL=62
Reply from XX.XX.XX.XX: bytes=32 time=2260ms TTL=62
Reply from XX.XX.XX.XX: bytes=32 time=1611ms TTL=62
Reply from XX.XX.XX.XX: bytes=32 time=1373ms TTL=62
Reply from XX.XX.XX.XX: bytes=32 time=1588ms TTL=62
Reply from XX.XX.XX.XX: bytes=32 time=1842ms TTL=62
Reply from XX.XX.XX.XX: bytes=32 time=1625ms TTL=62
Reply from XX.XX.XX.XX: bytes=32 time=2080ms TTL=62

Please advise. Any help is appreciated.

2

You’re power -49dB is too high. Try turning down the TX power by 5-8dB on each side and see if your CCQ and throughput improves.

3

Thanks! That helped with the CCQ but not the throughput or bandwidth issue. Anymore suggestions.

4

Update:
I’ve tried many configurations but I still have a major problem with throughput. The link I’m currently dealing with has 2-3ms ping times with some traffic on it. Once I do a receive bandwidth test from one MikroTik router to another the times and throughput start to degrade around 7Mbps. And a transmit bandwidth test from same one to same other one I get up to about 3Mbps before it starts to degrade. I’ve currently ran most of the network through a different link (using ospf) to cut down the amount of traffic through this link so luckily there is not that much traffic going through it right now. Please any help would be appreciated.

5

If you are using a 20 MHz channel, try 10 MHz or 5 MHz instead.

Are these links all in the same general area?
Could there be a new source of interference?
Could you run routeros on both sides and try nstreme?

6

If you are doing a ap to ap bandwidth test then the routers have to do packet assembly which is demanding processor wise.
This results in low/erratic ping speed rates.