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SDmitriy
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Posts: 6
Joined: Sun Dec 29, 2013 5:19 am

Problem with TCP-traffic on CCR1036-8G-2S+

Mon May 16, 2016 3:27 pm

Hello.
I ran into the following problem. Experiment is shown in the attached schema file.
With RB951 downstrem and upstream reaches ~94-95 Mbit/s. But using CCR1036-8G-2S+ downstream only ~25 Mbit/s and Wireshark indicate many TCP Out-of-Order and TCP Duplicate Ack packets:(((. This problem exist only on TCP-traffic and UDP-traffic in both direction passes without any problems (~94-95 Mbit/s). Also worth noting that tested without D-Link DGS-1100-6 downstream shows the result of ~94 Mbit/s (using CCR1036-8G-2S+).

Where could be the problem?
Mikrotik.png
The results of downstream and upstream tests (Iperf 1-10 sessions) :

CCR1036-8G-2S+ (Mbit/s)
1 session --- 23(down) --- 93(up)
2 sessions -- 29(down) --- 93(up)
3 sessions -- 33(down) --- 94(up)
4 sessions -- 36(down) --- 94(up)
5 sessions -- 90(down) --- 94(up)
10 sessions - 90(down) --- 94(up)

RB-951 (Mbit/s)
1 session --- 93(down) --- 93(up)
2 sessions -- 94(down) --- 94(up)
10 sessions -- 94(down) --- 94(up)

P.S.
RouterOS version 6.35.2.
RB951 and CCR1036-8G-2S+ have default configuration with the exception of:
1. Firewall without filter, mangle and NAT rules.
2. Interface Queues --- only-hardware-queue ( only-hardware-queue --- Kind none )
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trizcocho
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Joined: Thu Mar 23, 2006 1:21 pm
Location: Spain

Re: Problem with TCP-traffic on CCR1036-8G-2S+

Fri Dec 02, 2016 6:00 pm

I have the same problem

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