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ckgth
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80MB with 1TCP Connection, 200Mb with 20 TCP Connections....only Ethernet

Wed Oct 21, 2015 6:16 pm

Hello,

we have a Link

RB1000---CRS---MT-MediaConverter---10kmFiber---CRS----Alcoma6km----CRS----Alcoma4km---CCR

All Links are Gigabit Full-Duplex.

When i made an Bandwith-Test with max. 1 TCP Connetion from RB1000 to CCR, then only 80Mbit/s was reached, with 20 Connections are 200 Mbit/s reached.
Why?
What can be the Problem?
Alcoma-Links are licensed Links. There are working on 320 Mbit/s (radio).
The CRS hat 6.30.2 installed. The Ethernet-Ports are all configured as an slave Port from the other (no bridge).


best regards
Christian
 
kristaps
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Re: 80MB with 1TCP Connection, 200Mb with 20 TCP Connections....only Ethernet

Wed Oct 21, 2015 6:48 pm

Do not use bandwidth-test, for CCR testing it is limited to 1 CPU core -
use trafficgenerator:
http://wiki.mikrotik.com/wiki/Manual:Pe ... _Generator

or iperf3 http://software.es.net/iperf/
 
ckgth
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Re: 80MB with 1TCP Connection, 200Mb with 20 TCP Connections....only Ethernet

Wed Oct 21, 2015 7:04 pm

ok. this is clearify. but why are more traffic with more connections?
Should it than not be more ore same traffic with one?
 
kristaps
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Re: 80MB with 1TCP Connection, 200Mb with 20 TCP Connections....only Ethernet

Wed Oct 21, 2015 7:08 pm

This is how TCP works with parallel streams.
 
ckgth
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Re: 80MB with 1TCP Connection, 200Mb with 20 TCP Connections....only Ethernet

Mon Nov 09, 2015 2:53 pm

Hello kristaps,

when i make an LAN Cable direkt connection between 2 RB1200 , then BW-Test with 20 TC Connections are ~250Mbit/s, with 1 (one) Connection TCP are same (250 MBit/s).

Please tell me, where there is an TCP Paralell-Stream - Problem ?

with or without routing is wurscht !


best regards
Christian

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