TCP half of UDP

RouterOS Wireless Networking
1

I have a P2P link setup with 2 933mhz Intel P3, using SR5 cards. Nstreme, 5ghzturbo, I am getting 62mbps UDP end to end, but I only get half on TCP, around 30mbps, any reason why?

I have them hooked together directly with 60db attenuators (no antennas), signals around -50

Another note, I am doing the test from windows Pc to windows Pc with btest.exe across the link. When I try and do a TCP test to the Mikrotik box (receive) it locks up the box? any reason why? If I do a send it is ok, but will only do around 30mbps?

I saw a post
http://forum.mikrotik.com/t/60mbit-over-9km/7376/1
Where this person is getting around 60mbps with the same hardware I am using?

2

TCP has more overhead :slight_smile:
TCP uses acknowledgment, retransmission. That is why :smiley:

3

TCP has more overhead :slight_smile:
TCP uses acknowledgment, retransmission. That is why :smiley:

4

Ok, let me ask this, how come when I do a ftp download form Mikrotik box itself, I get 56mbps download? When I do ftp download from box behind mikrotik (ethernet) I only get half that?

5

did you try v3b7?


check you ethernet that goes from router to the pc (behind MT)

make sure its not gigabit ( i got only 19mbps with some of them)


also access you motherbord bios and disable everythink that u dont need
(USB Audio printer interface anything that u dont need then try) locking up router happend 2 me twice 1 for the Irq and 2nd one for the realtek gigabit

6

Well I just upgraded to 3.0v7 same issue.

I am doing a routed 2 hop system,

MikrotikA 1 SR5
|
|
MikroTikB 2 SR5
|
|
Mikrotik C 1 SR5

if I go from a to b, I get 45 tcp via windows file sharing
a to c I get 35?
Is it normal to lose 10mbps via the middle hop? Should I do eoip or wds?

7

Anyone know if this is normal, I wouldn’t think you should loose speed through a router like this?

8

are you testing from RB to RB

or from Windows (wirless link) windows?

9

The WDS should be faster then the EoIP tunnel.
Any time you repeat you will lose speed. Try it with two RBs in the mid point and connect them with a switch or just a ethernet cable.
A…B_C…D
Route them if you can.

10

Yes I am testing from Windows to windows, throughput is better windows to mikrotik.

I have tried WDS bridged and standard routing, and the performance is very close. So I am losing about 5-10mbps going through a extra hop, why is it that I am losing throughput, when I am not actually repeating the signal on the same wireless interface. The mikrotik box in the middle has two wireless cards.

11

What is the speed if you go from B to C?

12

smells like “only p2p can give great performance”, really?

regards, G. G.

13

What is your processor load on the AP’s ?? (B_C might be overloaded)