View Full Version : just looking for a little more

03-22-01, 01:38 PM
I'm at work today but tonite will lower RWIN, run test and post here. Thanks for the suggestions.

03-22-01, 01:41 PM
See with your RWIN that high you will have high pings and packet loss at night, try 373760

03-22-01, 01:44 PM
To test your tweaks do this: go to www.dslreports.com/tools (http://www.dslreports.com/tools) lot of tests here

03-22-01, 02:53 PM
Will try this lower RWIN, test your urls tonite and post back. And I don't have any @home software--only installed a nic card and my Windows found a newer driver.

03-22-01, 02:58 PM
Great, nothing needs to be cheched in: control panel, internet options, connections tab at top, LAN settings at bottom, NOTHING checked in this box, no proxy, no auto detect :p

03-22-01, 07:29 PM
OK, Web pages load quicker after lowering RWIN to 373760. Downloads are quicker, too--definitely. Although every speed test I try is so different it's crazy (hear a lot about that round here).

Did you mean "uneeded @home software" in above reply as in the speedguide @home patch, or something the @home techs would have installed with the modem? I did install the @home patch from speedguide, and the techs didn't install anything. Maybe better to uninstall the speedguide patch?

One more question, you said no firewall or virus protection during tests. Iz it safe?

Below are test results from speedguide/analyzer using the lower RWIN:

TCP options string = 020405b40103030301010402

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1460, which is equal to MSS.

Default Receive Window (RWIN) = 373760
RWIN Scaling (RFC1323) = 3 bits
Unscaled Receive Window = 46720
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
513920 (MSS x 44 * scale factor of 8)
256960 (MSS x 44 * scale factor of 4)
128480 (MSS x 44 * scale factor of 2)
64240 (MSS x 44)

bandwidth * delay product:
Your RcvWindow limits you to: 14950.4 kbps (1868.8 KBytes/s) @ 200ms
Your RcvWindow limits you to: 5980.16 kbps (747.52 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 47 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

http://monitor.dslreports.com/tweak/block:49aea is
the url for a dslreports tweak tester run just now.


03-22-01, 11:47 PM
Running a Dell 700 mhz Celeron and WinME. Recently signed up on cable with @home. Better speed than dial-up. Installed recommended patches here at speedguide which helped a lot. Tweaked RWIN to 513920 and MTU to 1500. My download speeds average 40-80 kbs. But hearing about these 300kbs downloads has me curious. Is there anything more I can improve, or should I just be happy and go away? ;)


03-22-01, 11:51 PM
One thing, lower that RWIN plus take this test and post here:
1. Go to http://forums.speedguide.net/optd.shtml and click on check connection.
2. Copy all this by highlighting everything in box with mouse
(you may have to make box smaller. To copy contents of box, highlight, then hit Ctrl & c, on your keyboard, when you return to Speedguide in reply box, with cursor blinking, hit Ctrl & v, this will copy contents in box so I may look at it. Thank you.
X out your IP Address as we don't want world to know this info

Tweaking will not fix Packet Loss
Multiplayer games over UDP
Your regular ping time
Regular PC Freezes
Spike Lagg

03-22-01, 11:52 PM
Also do you have all that unneeded @home software on your puter :)

03-22-01, 11:59 PM
Here print this:
How do do speed test
1. The best time is early in the morning (3 AM - 6 AM)
2. Make sure defrag has been run so no files are fragmented
3. Delete Temp internet files, not while testing, but after each test. IE browser, click tools, internet options, click on delete files and no this will not harm system, just get rid of temp files
4. Go to a fast server such as www.happypuppy.com (http://www.happypuppy.com) and click on 10 demos, select a LARGE file to download (not all of it , just most of it, before you click cancel) this will show you how fast you are downloading, it's not going to be quick except except early in morning when not many people on net. I recommend you go to www.analogX.com (http://www.analogX.com) and download Net State live, run this while downloading as it will give you avg of your download speed
Put system defrag in scheduled tasks to run everyday.
5. Probably the most important, nothing can be running during test, no firewalls, no virus stuff, no ICQ, no AIM (some of you may have to go into BIOS to disable virus scanner, nothing running except Net Stat live
Scheduled tasks will run disk defrag, 98 & SE in Taskbar, WIN ME in control panel
The people who want speed surfing or doing whatever must close all other programs.

Or if you wish you may go to www.testmyspeed.com (http://www.testmyspeed.com) and do one of the online tests, these vary to much for me but you may like them. Another one is at www.dslreports.com/tools (http://www.dslreports.com/tools) :)

03-23-01, 04:38 AM
Whoa! Don't know if there's any 'danger' in doing this, but I just boosted my RWIN to 899360 (MSS 1460 X 14 X 44) to see what would happen--the thing is screamin now! Downloads at 200-300 kbs and line speed 8X faster than before with RWIN @ 373760.

Temptation is getting the best of me, and might try for even higher. Backin up as I go, mind you...

03-23-01, 07:09 AM
See it would be very hard to explain, but those high RWIN numbers while seeming to go faster, the packet loss and the high pings won't get it so you kind of have to find a happy medium, try this RWIN number, these are not just any numbers so be careful: 385440 or 522680, will it be safe to turn off your firewall for the small amount of time you will be testing, well everyone does, they have to, nothing can be running for your test to be accurate, Print the above test instructions for future use, your test results look fine, but now that you have changed that RWIN go to dslreports tweak tester and see how your pings are (Should not be higher than the 60's during the day) do you have any packet loss, which means when you download something are you getting all of it, than RWIN must come down, I've never heard of one that high, oh yea, check at dslr about retransmissions too, all the above are direct result of having RWIN set to high, the @ home patch is fine on your pooter, just not @home's software, all you need from @home is the modem, the computer name (this is very important as it gives you your IP (Address on the net) and the workgroup name @home, that's it, file 13 that @home disk unless you really want to know what slow is, all your online speed tests will change every time you do one, thats why I tell you above in instructions to download a large file from a fast server, this is more accurate, www.happypuppy.com (http://www.happypuppy.com) ,click on 10 demos and I believe the first one listed is a 171 MB download, plently of time to see your speed,
don't forget to clear temp internet files before testing, see I download at about 640KBytes a sec and my RWIN is only 385440 so bigger is not always better, yes you will be alright without virus scanner on for short time while testing, see once you get it fast and setup right, you will not testing everday so all this stuff will be on, you'll be fine, every time you play with that RWIN go to dslreports and take tweak test, because it does not matter what your speed is if your pings are to high, packet loss out of this world and retransmissions are high, lower that number :eek: :eek: :eek:

[ 03-23-2001: Message edited by: Lobo ]

03-23-01, 07:30 AM
Lobo, I trust your advice. I'm comfy with basic Win/hardware/software but new to broadband/TCP world--just got cable but learning fast thanks to you and the other good folks here.

I'll follow through and post back in a few days.

Tanks tons. :p

03-23-01, 07:33 AM
Lobo, forgot to say thanks for the tools you sent: tests, speed9x, net stat, speedcorp.net, etc.

Fun and useful.

03-23-01, 09:01 AM
Lobo, one more and I'm off to test. You mentioned high RWIN causes retranmissions. Also same for "2+ second stall detected" message in dslr test? Just curious.


03-23-01, 09:07 AM
You will find out that lowering that RWIN some will cure alot of problems, do not take the advice of dsl reports as they mainly deal with dsl people, do not lower your RWIN to what they recommend as you are on cable not dsl. We just use some of there info :)

03-24-01, 10:32 PM

I'm happy with performance after tweaks you suggested. Faster and smoother page loads, shorter pings, faster downloads--happenin. As we used to say in TN, "It'll sit up and bark."

The next puter will obviously be Pentium with Win2K.

Tanks tons! :) :) :)

03-24-01, 10:52 PM
Lobo Check out Dannjr post for Enternet300. Which I know proubly don't apply to this . But the WRin setting is great. I tried it and LIke it. Its 471712 . I know it does not mach the ones in the tweak but. But it help my system out greatly. It is the first wrin that high that has work for me. Just thought I would let you know in case you might want to try it out. :D

03-26-01, 05:42 AM
I have only 500/100 line with mediacom/home.com in MN. Kept backing down the RWIN to someone's recommendation of 20440. I know this is a LOT lower than what I tried before, but now have nil packet loss and retransmissions, and downloads are 94% of line speed. That dog'll run.

Thanks for all the great advice here!

03-26-01, 07:52 AM
Will check it out, thanks!

03-26-01, 01:28 PM
hey lobo
is this good ????
plez reply back...i want more speed!!!

TCP options string = 0204058601010402

MTU = 1454
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput.

MSS = 1414
Maximum useful data in each packet = 1414, which is equal to MSS.
MSS is not fully optimized for broadband (although it might work well for slower connections). Consider increasing your MTU value.

Default Receive Window (RWIN) = 16968
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 16968
RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
520352 (MSS x 46 * scale factor of 8)
260176 (MSS x 46 * scale factor of 4)
130088 (MSS x 46 * scale factor of 2)
65044 (MSS x 46)

bandwidth * delay product:
Your RcvWindow limits you to: 678.72 kbps (84.84 KBytes/s) @ 200ms
Your RcvWindow limits you to: 271.488 kbps (33.936 KBytes/s) @ 500ms
Consider increasing your RWIN value to optimize TCP/IP for broadband.

MTU Discovery (RFC1191) = ON

Time to live left = 117 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

54054 connections tested since 03-10-2001, 14

03-26-01, 01:51 PM
No this does not look good, bring me up to speed, what OS, who's patch, what kind of connection :)

03-26-01, 01:53 PM
And also start your own thread/topic :)