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Author Topic: Address Based Filtering Technicolor TG582n FTTC slows down throughput speed  (Read 21338 times)

Chrysalis

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Re: Address Based Filtering Technicolor TG582n FTTC slows down throughput speed
« Reply #30 on: November 23, 2013, 09:33:40 AM »

ok guys do this test.

disable the filtering.

goto speedguide.net
on left goto broadband hover over it for menu.
goto broadband tools on the menu
click on sg tcp/ip analyzer on the menu

note the results.

enable the filtering.

repeat same test making sure not cached result.

I suspect the router is overiding tcp buffer sizes, disabling rfc1323 etc. on http traffic and as such throughput is restricted, this theory is working on the same principle that most people think cloud servies are throttled as they get low upload speeds but thats simply down to restricted tcp send buffers.

Bear in mind tho if using windows vista or newer with automatic tcp tuning speedguide.net will only show a buffer below 65k as autotuning only goes above that when downloading large files.  To analyse it more will probably need to sniff the traffic.

Its very unlikely to be BTw shaping/throttling, could be plusnet as we know those guys still use the shaping devices but I think most likely its the router.

Incidently if I enable QoS on my router it maxes out at about 45mbit/sec probably due to cpu, and possibly also due to manipulation of tcp headers.
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JGO

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Re: Address Based Filtering Technicolor TG582n FTTC slows down throughput speed
« Reply #31 on: December 19, 2013, 03:57:06 PM »

Before we get engulfed in the festive season, I wonder if there are any conclusions on this subject ?

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