|
|
Been playing with Wireshark and tbh it's a bit above my head. But I am seeing TCP DUP Acks and reassembled segments around the time my large downloads pause. Is the download losing packets and restarting after losing a packet or two?
I am trying to discern if it's my router or ISP. Pauses are fairly random and Billion cant reproduce the problem. Also if I use a Speedtouch 546 router it doesn't seem to happen or if I use multiple streams on the download eg 4 streams. One would have thought if the router was losing packets/segments it would happen on all download streams. Help!
|
|
|
Try pingplotter free and see if there's an increased ratio of dropped packets when the pauses occur.
~~~~~~~~~~
© Camieabz 2002-2012
All Connection Data ~ plusnet
Scottish Labour politician: �The SNP are on a very dangerous tack. What they are doing is trying to build up a situation in Scotland where the services are manifestly better than south of the border in a number of areas.�
Interviewer: �Is that a bad thing?�
Scottish Labour politician: �No, but they are doing it deliberately.� |
|
|
Thought you may have had it there. Downloaded 500mb from TBB site, single stream, loads of pauses. Ran PP Free at same time and no PL anywhere on the route including my router to TBB. Ping went up to about 100ms while downloading then reduced to about 40ms during pauses. Any other ideas?
|
|
Register (or login) on our website and you will not see this ad.
|
|
|
|
Duplicate ACKs are normally an indication of out-of-order TCP packets. Incorrect traffic shaping or weird buffering somewhere could cause that.
When you get the download pauses, does this happen on all sites you test on or only on a specific site?
|
|
|
All sites are effected, but if I use a download manager with 4 streams like DownThemAll no pauses.
|
|
|
Well it's not dropped packets then. Use the 546 seems to be the best plan.
~~~~~~~~~~
© Camieabz 2002-2012
All Connection Data ~ plusnet
Scottish Labour politician: �The SNP are on a very dangerous tack. What they are doing is trying to build up a situation in Scotland where the services are manifestly better than south of the border in a number of areas.�
Interviewer: �Is that a bad thing?�
Scottish Labour politician: �No, but they are doing it deliberately.� |
|
|
|
This is a truly an illusive problem!
Ok, another question. When you are downloading, are you maxing out your line speed? (if so, how fast?).
Can you rate-limit the download? (possibly better to download from a site that rate limits their side) to see if you still get pauses during a download running at a slower speed?
It sounds like a buffering problem, or like the Billion is tripping over itself (or something). Still not really sure to be honest.
|
|
|
|
Try lowering your RWIN or increasing interleaving
|
|
|
Well it's not dropped packets then. Use the 546 seems to be the best plan.
546 gets way too many CRC errors and reboots every 2-3 days but otherwise ok. Fairly limited on firmware choice too.
|
|
|
This is a truly an illusive problem!
Ok, another question. When you are downloading, are you maxing out your line speed? (if so, how fast?).
Can you rate-limit the download? (possibly better to download from a site that rate limits their side) to see if you still get pauses during a download running at a slower speed?
It sounds like a buffering problem, or like the Billion is tripping over itself (or something). Still not really sure to be honest.
Yes maxing line out at 17.76 mbps on a 19.88 mbps sync. Workaround is to use multiple streams. Router has QoS so could rate limit that way or software in firefox. Probably simplest way is to find a rate limited server possibly in US. Will report back on tests.
|
Pages in this thread: 
Print Thread
Banger
