MikroTik

I cant get 100Mbit full duplex, but all say that it is 1Gbit full duplex!

In tcp it is 50Mbit/10Mbit

In udp test speed growth up, up to 150/150Mbit then Rx drop down to 5Mbit,
Tx up to 295Mbit. (in full duplex it must be 300/300Mbit ?)

Help me please.

tpc test:
http://i49.tinypic.com/2ceqafp.png
upd test/interfaces/hardware:
http://i46.tinypic.com/be78dg.png

RouterOS 5.19
Routerboard 2.41

Remember that the test is also showing what your PC is capable of sending/receiving.

It is, but my PC internet card say that it is 1Gbit full duplex.

Can you help me to solve this problem?

It says that the interface is set up to operate at ! Gbps full duplex but that doesn't mean that the CPU, OS and all the other bits that make up the PC can actually send and receive at that speed!

Also look at the published throughput on the router:

http://routerboard.com/RB751G-2HnD

I see and know all of that, it can not help me

I need to know exactly what is wrong to solve the problem!

It looks strange becouse in udp test bandwidth is 150Mbit/150Mbit - so it seems that it can work 100Mbit full duplex but dont.

What speeds do you expect to see?

Try measuring only one direction at a time - not both. I suspect that your PC can't get even close to 1 Gbps both directions concurrently.

I want get 100Mbit/s full duplex.

My cpu is E6550 core 2 duo (@3150Ghz) 4Gb RAM

Why you think my PC can not get 1Gbit/s?

1-line udp is 320 Mbit Send, and recieve do not work, in both it growth up to 300Send/20Recive Mbit (go throw point 150Mbit/150Mbit)

In tcp it is 40Mbit in Btest, but Windows show that in fact it is 100Mbit, also it is in sum Tx+Rx 100Mbit in "both", in Recive it is 70Mbit, mb router cant generate 100Mbit/s traffic, mb Rx go down becouse router cant generate enough traffic - becouse in resources screen of router i see that it is 100% load of router CPU.

So it seem that i make mistake in settings? This router must work with higher traffic then 50Mbit/s tcp - right?

Can you help me with settings? (i can not get 100Mbit full duplex for utorrent)

http://i45.tinypic.com/16lfr51.png

So it looks like single duplex - when Rx go up Tx go down.

But everything say - full duplex - what is the problem?

Update: I think it can be because of cable, changed it to 1Gb/s cable(8 - wire) - nothing changed.

try to put one more mt device between yor computer and radio. then take btest between this devices.

I think you're entirely misunderstanding the concept of 'usable' bandwidth.

Link speed is the theoretical maximum transfer rate over the link. The RB751G simply cannot generate 1Gbit worth of traffic, nor could it ROUTE 1Gbit worth of traffic, since every single packet needs to be processed by the CPU.

If you are dealing with *switched* traffic, you could transfer 1Gbit over the connection, because no CPU intervention is required to process each packet.

Your "speed tests" are being limited by the finite resources available in the RB751's CPU.

I think you're entirely misunderstanding the concept of 'usable' bandwidth.

Link speed is the theoretical maximum transfer rate over the link. The RB751G simply cannot generate 1Gbit worth of traffic, nor could it ROUTE 1Gbit worth of traffic, since every single packet needs to be processed by the CPU.

If you are dealing with *switched* traffic, you could transfer 1Gbit over the connection, because no CPU intervention is required to process each packet.

Your "speed tests" are being limited by the finite resources available in the RB751's CPU.

I can not get full duplex, 100Mbit/s full duplex, only half duplex - this is a problem. I see problem while using utorrent, btest only approve that it is half duplex.

If the link says it is in full duplex mode then it is.

Whether this particular PC/router combination can saturate both the tx & rx paths concurrently is an entirely different question.

Suggestions:

Try a different PC and compare
Try a different router and compare
Try two routers without a PC involved and compare