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TCP half of UDP
Posted: Thu Apr 12, 2007 2:27 pm
by n4dsl
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/viewtopic.php ... th+tcp+udp
Where this person is getting around 60mbps with the same hardware I am using?
Posted: Thu Apr 12, 2007 3:55 pm
by tgeorgiev
TCP has more overhead
TCP uses acknowledgment, retransmission. That is why
Posted: Thu Apr 12, 2007 3:56 pm
by tgeorgiev
TCP has more overhead
TCP uses acknowledgment, retransmission. That is why
Posted: Thu Apr 12, 2007 5:01 pm
by n4dsl
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?
Posted: Fri Apr 13, 2007 9:58 am
by taloot
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
Posted: Fri Apr 13, 2007 7:21 pm
by n4dsl
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?
Posted: Tue Apr 17, 2007 1:57 pm
by n4dsl
Anyone know if this is normal, I wouldn't think you should loose speed through a router like this?
Posted: Tue Apr 17, 2007 2:01 pm
by taloot
are you testing from RB to RB
or from Windows (wirless link) windows?
Posted: Wed Apr 18, 2007 3:08 pm
by jober
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.
Posted: Thu Apr 19, 2007 1:38 pm
by n4dsl
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.
Posted: Thu Apr 19, 2007 6:40 pm
by jober
What is the speed if you go from B to C?
Posted: Sat Apr 21, 2007 5:29 pm
by chvdr
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.
smells like "only p2p can give great performance", really?
regards, G. G.
Posted: Mon Apr 23, 2007 7:23 am
by Connor9220
What is your processor load on the AP's ?? (B_C might be overloaded)