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?
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:
- Firewall without filter, mangle and NAT rules.
- Interface Queues — only-hardware-queue ( only-hardware-queue — Kind none )