I've been having painfully slow downloads on my Cable TV boxes for the last couple of months and I've been trying to solve the problem.
using port mirroring, I've managed to create a wireshark port capture of what is happening when I run a speed test on the cable tv box. The cable box IP is 192.168.55.253 in this case.
There seems to be a whole heap of TCP DUP ACK going on, would that have something to do with it?
asked 08 Aug '15, 23:51
Let me rephrase the question: why does the speed test fail when connecting via a MikroTik router?
The 'speed-test' consists of an HTTP GET request of a large (10576244) file.
The succeeding speedtests via the netgear router do not show any packet loss.
So unless you can convince the TV box to wait longer for a successful retransmission,to fix this problem you need to avoid the packet loss.
As per http://wiki.mikrotik.com/wiki/Manual:Queue_Size - Default-small queue type "By default most of the queues in RouterOS have queue size of 10. "
This is probably not enough to get a seamless packet-flow going .
Maybe this problem is better addressed to the http://forum.mikrotik.com/
answered 15 Aug '15, 09:00
"There seems to be a whole heap of TCP DUP ACK going on, would that have something to do with it?"
If you refer to 'it' as the slow downloads the answer is no.
answered 12 Aug '15, 00:22