Slow throuput between Mikrotik RB951G & RB751 - Please help

[nerf]

Hi All

I have two Mikrotik RB951G's that form a wireless bridge, then one RB750 connected to one of the RB951

So its RB951G >Wireless> RB951G >Ethernet> RB750

Both the middle RB951G and RB750 are setup to switch all ports (exception of port 1 on RB750 as it can't and is used to connect to the modem. The RB750 also does NAT and DHCP).

The NAS is connected to the middle RB951G the PC to RB750.

Everything works, I can access all devices and all devices can see Internet but when I try to copy from the NAS to the PC (NAS > RB951G > RB750 > PC) the speed is extremely bad in the region of 50KBps.

When I put a cheap Tenda switch in between the RB951G and the RB750, then the PC all of a sudden gets full speed 10MBps form the RB750

The link between the RB951G and RB750G without the switch I get a 100mbps full duplex link and I get close to 100mbps on the mikrotik bandwidth test.

The Wireless bridge between the two RB951G's can stream perfect 1080p from the NAS (I have a bridge between port 1 of the RB951G's which all lan ports are switched and their wlan interface).

Does anybody perhaps have an idea why the throughput is so bad without the Tenda switch inbetween the RB951G and RB750 ?

Thanks.

 

[@udiS3]

Has the MTU been fiddled with on your middle MikroTik router?

You might want to try torch using winbox and take a look at the traffic.
Keep an eye out for dropped and re-transmitted packets..

 

[nomdeplume]

I have a bridge between port 1 of the RB951G's which all lan ports are switched and their wlan interface

Remove the bridge and test the throughput

 

[paul5186]

What version of ROS are you using on all routerboards? I know there was reports of slow throughput between e.g hop A - b -C due to some NV2 issues.

 

[Q-Tech]

Is it possible there's some sort of auto/auto duplex/speed argument going on between the RB915G and the RB750 which gets sorted by the Tenda switch ? If you haven't already, try fixing speed & duplex on both devices rather than leaving them on auto.

 

[B@llas]

Hi, anyone that can help cofig mikrotik online. If got the network up and can ping to the other end but if i input the camera address into the browser then it doesnt open. Need someone to help me as i will pay him for his service. let me know urgentley. Reg Jaco

 

[nerf]

Thanks all, for the help . I will be going to the place where these routers are on the weekend and will try to apply your fixes and suggestions.