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Optimal settings to improve maxdsl speed?

docrobster
Grafter
Posts: 132
Registered: 04-09-2007

Optimal settings to improve maxdsl speed?

Has anyone got any suggestions for getting the best speeds at peak times on MaxDSL?
I have been maxed for 16 days now and as you can see my speedtest results are pretty erratic- these are the PN ones but I've had similar from other speed testers:

Quote
Date Speed Achieved (kbps)
21-06-2006 22:59:38 2532.8
21-06-2006 22:13:02 1505.9
21-06-2006 21:43:01 1139.3
21-06-2006 21:42:43 1085.6
21-06-2006 21:23:05 628.7
21-06-2006 19:04:42 255.7
16-06-2006 14:18:54 999.9
12-06-2006 15:59:38 363.2
11-06-2006 20:24:08 1346.8
10-06-2006 10:56:49 2549.1
09-06-2006 22:15:02 2794.8
09-06-2006 07:59:08 3007.3
08-06-2006 20:23:34 1521.9
08-06-2006 07:29:06 1464.5
07-06-2006 20:37:14 1805.3
07-06-2006 20:07:15 2005

My problem seems to be a low snr- usually around 4, with attenuation of 34. This is through DG834gV2 plugged directly into the master socket, connected to a single PC via wifi. Removing the faceplate increased the snr to 5 or 6, but didn't affect download speeds. I was syncing at around 6800 through the master socket, and this went up by about 1000 without the faceplate.
I tried tweaking MTU and RWIN as advised by http://www.broadbandreports.com/tweaks, but this lowered the sync speed to below 6000, although the actual download speed was no worse.
I am wondering where to go next- would it be worth trying a NTE5 faceplate, or altering the netgear's MTU value (the tweaktester has set the pc's mtu at 1500, so I would have thought not)
Any suggestions would be appreciated.
Thanks, Rob
7 REPLIES
fotobits
Rising Star
Posts: 584
Fixes: 1
Registered: 23-06-2007

Optimal settings to improve maxdsl speed?

I, too, would be interested to hear what other users are experiencing with revised MTU and WIN settings for maxdsl speeds.

My previous bandwith was 2MB and my MTU/WIN settings were 1478/63272, which usually gave me PlusNet reported download speeds of over 1850kbps.

Using the same MTU/WIN settings, maxdsl bandwidth of 8MB, new synch as reported by my router is usually 8128/381 and PlusNet broadband speed records as 7500kbps, gives PlusNet download recorded speeds of 6050kbps in the morning, reducing to 3000kbps during the day.

I have just reset my MTU/WIN settings to 1430/166800 and am recording a PlusNet download speed of 5981kbps, in the late afternoon. Although I'll have to see how things go over a couple of weeks.

Are there any recommended settings for 8MB bandwidths?

I've looked at the Kitz settings....http://www.kitz.co.uk/adsl/tweak2.htm.... and most of the suggestions give MTU's that aren't really valid with the proposed WIN, ie the WIN is not a whole number multiple of the (MTU - 40).....or am I wrong about this numerical relationship?

Previously there were suggestions on the PlusNet Forum for up to 2MB bandwidths.

Regards and thanks.....Noel
N/A

Optimal settings to improve maxdsl speed?

The figures dont seem to represent your connection speed. BT have not been updating +net with the new speed try unplugging the router leave for a bit and then try again as its supposed to be fixed now.

If you connect @ 6 meg then your download speed test should be 5-6meg.

Changing the setting on your pc for MTU etc wont have a lot of effect as its still connecting to the same router you would have to make changes on the router to do any good.
N/A

Optimal settings to improve maxdsl speed?

Quote
I, too, would be interested to hear what other users are experiencing with revised MTU and WIN settings for maxdsl speeds.


Early days with MaxDSL here but I'm currently using MTU/RWIN of 1500/172280 and seeing best-case throughputs of 5500-6000kbps on an 8000kbps line.

DSLReports "Tweak Test" http://www.dslreports.com/tweaks shows good results with very few retransmits and no packet loss so I'm happy..... for now. Smiley

Al
fotobits
Rising Star
Posts: 584
Fixes: 1
Registered: 23-06-2007

Optimal settings to improve maxdsl speed?

Many thanks, mwright and ajbremner, I do change the router's MTU when I change it in Dr TCP and my router is off overnight, so reconnects each morning. I get a +Net broadband connect of 7500.

This morning the +Net download speed was 5804, however, I changed to ajbremner's settings and got the fastest download I've recorded in the last 2-weeks, ie 6217. I'll try this for a while!

In my ignorance, ajbremner, I find the Broadband Reports results a bit mistifying, eg I've just tested using your settings and they tell me to reset the MTU to 1500. It is 1500!

Regards and thanks.......Noel
N/A

Optimal settings to improve maxdsl speed?

Best settings so far for me are

MTU = 1478

RWiN = 149552
N/A

Optimal settings to improve maxdsl speed?

Quote
In my ignorance, ajbremner, I find the Broadband Reports results a bit mistifying, eg I've just tested using your settings and they tell me to reset the MTU to 1500. It is 1500!


I can't help much as I'm pretty much in the dark as far as the technicalities are concerned. If router and PC both have an MTU of 1500 then that's the size of packet the test server should see, provided there's nothing between you and it causing fragmentation. Try "ping -f -l 1472 www.dslreports.com" - all packets should return successfully. You should also see reference to an MSS of 1460 in the Tweak Test results, which will confirm an MTU of 1500.

Sorry I can't be of more help. I tried to run a test myself to locate exactly where the relevant data is but the server appears offline at present.

Alan
docrobster
Grafter
Posts: 132
Registered: 04-09-2007

Optimal settings to improve maxdsl speed?

Well I have spent the last few days fiddling around with everything and have managed to get the sync to stay pretty stable at 7840-8128 through the test socket so a NTE5 faceplate is on it's way.
Playing with MTU/RWIN hasn't helped much. In fact I managed to make things a lot worse by having too big a MTU figure- shows it is important to find the biggest number with no packet loss- for me this is an MTU of 1430 so the PC is set with this. As long as the RWIN is in the range recommended by broadband reports it hasn't made a noticeable difference. I am still dissapointed that at peak times ( i.e. the only time I am likely to use the internet) I have now got a sub 2Meg connection Cry