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You really don't know what I'm talking about. Note that for this to work, it is best to set your MTU value to 1500 temporarily, since the largest non-fragmented MTU us also bound by the MTU value on your end.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 19 Meg WBC
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You really don't know what I'm talking about.
Yes I do, there is little point making your PC's MTU 1500 (or higher with jumbo frames) if you already know your internet connection device is forcing a 1492 MTU - you give the router more work to do in the first place splitting packets.
Normal advice is to set the router to the highest MTU it supports (typically 1500) and then tweak the originating PC - and thankfully with modern OSes (Vista/Win7/MacOS) this happens for you. XP is the issue, and some/many security products can affect this too.
James BT Infinity 2 19/09/2012 - Estimate 44.6/6.5 - Install 52/12 - Actual 46 / 8 Mbps
13 years of broadband - ntl:(512k/1M)/BTbusiness(2M)/Metronet(2M)/Bulldog(8M/16M)/BE(16M)/BT FTTC(50M)
Edited by jchamier (Sat 20-Oct-12 11:15:40)
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there is little point making your PC's MTU 1500 We're talking here about determining the max. MTU of the connection, w/out making any assumptions, not setting the PC's MTU to anything unsuitable.
EDIT: With XP, which is all we are talking about, MTU already defaults to 1500 and so is already making router do more work and so we are employing TCPOptimiser to find a more suitable MTU value for the PC.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 19 Meg WBC
Edited by XRaySpeX (Sat 20-Oct-12 14:12:13)
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there is little point making your PC's MTU 1500 We're talking here about determining the max. MTU of the connection, w/out making any assumptions, not setting the PC's MTU to anything unsuitable.
Understood, but its also worth finding out a) what the PC is currently set to, and b) what the router is currently set to. Otherwise you may come to the conclusion that the ISP has a limit.
EDIT: With XP, which is all we are talking about, MTU already defaults to 1500 and so is already making router do more work and so we are employing TCPOptimiser to find a more suitable MTU value for the PC.
As long as the router isn't incorrectly set.
James BT Infinity 2 19/09/2012 - Estimate 44.6/6.5 - Install 52/12 - Actual 46 / 8 Mbps
13 years of broadband - ntl:(512k/1M)/BTbusiness(2M)/Metronet(2M)/Bulldog(8M/16M)/BE(16M)/BT FTTC(50M)
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Stephen Todd - I tried the links you suggested and got 48.7 down and 6.50 up. BT Speedtester reports 6.32 upload tonight.
I have used the same laptop on mine and my folks connections - there's worl flawlessly!
RobertoS - I shall try the reset and come back...
Predicted speed 54.7Mbps down/15.7Mbps up. Actual speed 50Mbps down/6.5Mbps up...  |
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Yes change isp or get bt to give you what your projected line speed says. I was told by openreach engineer mine should be 17.5 and after he rewired from the pole to house and new master socket that is what I got. So go figure. I'm with talk talk so if it isn't your wiring then its your isp.
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Update - thought I would contact BT and see what they have to say. Called them earlier and was told that as my predicted upload was up to 15.7Mbps that the speed I am getting is acceptable. I explained that my folks, connected to the same cabinet get 9Mbps (on Infinity 1). I was then asked to hold while the nice lady went away to ask a technical specialist. She came back and explained that it could be the connections at the cabinet etc. Fair point I thought but still worth investigating I think. I then explained that when my folks had their connection fixed last week (was impressed with the Openreach Engineer by the way) I asked him to check my line. He told me is is capable of 64 down and 10 up, but he seemed to think the line was capped perhaps. I explained this to the lady and she went away again to ask more questions. She came back and explained the chap she spoke to says 6Mbps will be ample for what I need to use the Internet for! Charming! How does he know what I do online?! The lady is going to look into this further and call me back tomorrow night. Hmm...!
Predicted speed 54.7Mbps down/15.7Mbps up. Actual speed 50Mbps down/6.5Mbps up... |
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Or in rather less words, she and the people she is asking don't have a clue and don't give a damn.
That tale in itself is worthy of a high-level complaint.
My broadband basic info/help site - www.robertos.me.uk | Domains,website and mail hosting - Tsohost.
Connection - Plusnet Extra Fibre (FTTC). Sync ~ 57.4/14.6Mbps @ 600m. - BQM
"Where talent is a dwarf, self-esteem is a giant." - Jean-Antoine Petit-Senn.
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Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.
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Or in rather less words, she and the people she is asking don't have a clue and don't give a damn.
That tale in itself is worthy of a high-level complaint.
Seconded! If BT customer services did that to me, I'd write to the executive office.
James BT Infinity 2 19/09/2012 - Estimate 44.6/6.5 - Install 52/12 - Actual 46 / 8 Mbps
13 years of broadband - ntl:(512k/1M)/BTbusiness(2M)/Metronet(2M)/Bulldog(8M/16M)/BE(16M)/BT FTTC(50M)
Edited by jchamier (Mon 22-Oct-12 07:46:29)
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The whole point of fibre is to get more than 6meg as many people get more than that on ADSL/ADSL2+. Are you sure? I thought Annex M maxed out at around 3.3Mbps. Nevertheless I agree it's still worth making a complaint about BT customer services.
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