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cant find it in my Registry


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I understand all the lingo but cant find it in my Registry, I looked in;

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesTcpipParameters

and cant find something to change my Receive Window  or my Window Scaling.

Receive Window (RWIN):  65535

Window Scaling:  off

Path MTU Discovery:  OFF

RFC1323 Window Scaling:  OFF

RFC1323 Time Stamping:  OFF

Selective Acks:  ON

MSS requested:  1460

TTL:  unknown

TTL remaining:  109

http://ttester.broadbandreports.com/tweak/block:5185dfe?service=cable&speed=4000&os=win2k&via=normal

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Hey Blako : Like Van Buren said Cablenut will make the settings in your registry.I did notice it used a different RWIN than yours.Since the broadband test said yours is in good range maybe you should use that one or try the cablenut to see if it works better & put your old one back if it doesn't.If you still want to find these in your registry Use the registry find It should be in the edit pulldown.Type in DefaultReceiveWindow then select find.Do the same with GlobalMaxTCPWindowSize.

I have Windows ME but I bet your 2000 registry has a simular find function.Then you can decide if you need to do anything with them.  Cholla

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Hey  Blako: I would try it like it is first to see how it worked on your OS.Then if you don't like it try your old RWIN setting to see how it does.DefaultReceiveWindow &GlobalMaxTCPWindowSize are the RWIN settings.Use the CCS file that is closest to your connection.If you have problems Van Buren can do a custom one for you.Vans the real expert on Cablenut.

Cholla

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Hey Blako: I'm not the expert here Van Buren is but he's offline so try this.Go to this site run their TCP Analyzer.It link is on the left of their page about middle.select this it will run automatically.It will tell you what MTU & MSS your OS is using It will tell you what RWIN tou are using & give you a list of multiples of MSS try these to see if it helps.Larger to smaller until you get the smoother operation you are after.I beleive your MTU should be 1500 & MSS 1460.Also I am not sure about windows 2000 but on 98 & ME windows scaling needs to be enabled on RWIN larger than 65535 in Cablenut this would be TCP1323Opts set at 1 . this is the link:

https://www.speedguide.net/

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Another Question for Van,

In cablenut tweak screen:

DefaultReceiveWindow .......= 549888

GlobalMaxTcpWindowSize = 124100

TcpWindowSize...................= 124100

TCP1323Opts.......................= 1

These are VanBurens preset setting for 4000/512 found in cablenut verson 6

Both dslreports.com/tweaks and speedguide.net/analyzer report my RWIN: 124100

I know that what you (Cholla) said on MTU & MSS is correct and I have those settings.

Are you saying the "TCP1323Opts" is the scale "multiplier"?

Okay, Van...  How do I set my personal RWIN using Cablenut?

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Hey Blako: I'm not sure if it is called the multiplier .If set to 0 windows 98&ME Automatically limit the max RWIN to 65535.

I'm not sure about windows 2000.If you set it to 1 then the windows will scale.There is also a ms update that is necessary for 98 to do this but it probably isn't nessary for 2000.Did you try the TCP analyzer here: https://www.speedguide.net/ it shold tell you if your scaling is working.In its RWIN area.

These are the 3 RWIN settings in Cablenut set your personal ones there to what you want then use the"save to registry "button at the bottom of the Cablenut adjuster.

DefaultReceiveWindow .......=

GlobalMaxTcpWindowSize =

TcpWindowSize...................=

your settings here are different I beleive they should both be the same.The TCP analyzer has RWIN suggestions based on your MSS.You might try these to see if they perform better. It should show what your rwin scales to  & the number of times it scales.Post again after trying this . Cholla

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Another Question for Van,

In cablenut tweak screen:

DefaultReceiveWindow .......= 549888

GlobalMaxTcpWindowSize = 124100

TcpWindowSize...................= 124100

TCP1323Opts.......................= 1

These are VanBurens preset setting for 4000/512 found in cablenut verson 6

Both dslreports.com/tweaks and speedguide.net/analyzer report my RWIN: 124100

I know that what you (Cholla) said on MTU & MSS is correct and I have those settings.

Are you saying the "TCP1323Opts" is the scale "multiplier"?

Okay, Van...  How do I set my personal RWIN using Cablenut?

with windows 2k and XP sp 1 the tweaktester will read TcpWindowsize and with XP SP2 it will read DefaultReceivewindow

to make personal settings i suggest to test this http://j79zlr.com/cablenutXP2k.php

and use the Defenitions link in my previous post

VanBuren :)

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I used cablenut on my slower computer because my dad needs a fully fuctioning computer to do his audio recordings and studio mixing.  I am going (physicaly) slow today because my wisdom teeth got pulled out 2 hours after Van's last post....Hold on, my mouth is filling with blood...Ok better.  I think that one of the other settings that cablenut changes is making problems for me.  On all the tests post-cablenut, the test pauses for 2-4 seconds during testing and I have been geting scores such as 2500Kbps rather then 4000Kbps.  Only once did the test go perfect and I noticed a 10% increase as I hit 4400Kbps.  I will be back to post my tweeked settings from the other computer.

I read up on the defiitions Van posted and its kinda fun in a brain twisting way.

Um, Van, what are the pros and cons for having the recive window larger then the Tcpwindow?  At the tweeked computer is 730Mhz and the cpu load is substantial during testing.

Thanks guys for the info.  Type to ya later

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From SpeedGuide.net

MTU = 1500

MTU is fully optimized for broadband.

MSS = 1460

Maximum useful data in each packet = 1460, which equals MSS.

Default Receive Window (RWIN) = 256960

RWIN Scaling (RFC1323) = 2 bits (scale factor of 4)

Unscaled Receive Window = 64240

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 )

128480 (MSS x 44 * scale factor of 2 )

64240 (MSS x 44)

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From SpeedGuide.net

MTU = 1500

MTU is fully optimized for broadband.

MSS = 1460

Maximum useful data in each packet = 1460, which equals MSS.

Default Receive Window (RWIN) = 128480

RWIN Scaling (RFC1323) = 1 bits (scale factor of 2)

Unscaled Receive Window = 64240

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 )

64240 (MSS x 44)

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Hey Blako:it looks like the smaller window had less delay.This is the info I wanted to see:

Default Receive Window (RWIN) = 128480

RWIN Scaling (RFC1323) = 1 bits (scale factor of 2)

Unscaled Receive Window = 64240

It shows your OS scaled 1 time& your unscaled window is 64240 this should be correct.

You might try 64240 as your RWIN & turn off scaling like this:Tcp13230ps=0

See if this works better for your OS with no delay.If this causes a slowdown because of the smaller RWIN you can change it back.This would only be slightly smaller than the RWIN you started with 65535 before tweaking.The difference is 64240 is a multiple of your MSS.this is where you should get better performance because thie matches packet size.Less or no resizing & fewer retransmits.  Cholla

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Test of Van's Cablenut Settings

All tests done with 2992KB unless otherwise noted

Cablenut 3000/384

2754 Kbps

2924 Kbps

3748 Kbps

3182 Kbps

3150 Kbps

AVERAGE = 3151Kbps

Cablenut 4000/384

3343 Kbps

4287 Kbps

4442 Kbps

5897 Kbps

4103 Kbps via 5983KB

2804 Kbps

AVERAGE = 3462 Kbps

Cablenut 5000/384

2353 Kbps

3307 Kbps

3367 Kbps

4557 Kbps

3476 Kbps

AVERAGE = 3412 Kbps

My 30 day average is 3800Kbps down, also see my sig.

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730Mhz Celeron processor using Cablenut 4000/384

Router vs. Direct connect

With router in Kbps:

3476 & 2442 & 3056 & 2595 & 2260 & 2162 & 2966 & 3885 & 2392 & 3993

WITH ROUTER AVERAGE = 2923Kbps

Direct Connect to Modem in Kbps:

2329 & 3663 & 2235 & 2462 & 5141 & 3476 & 4466 & 2584 & 2753

DIRECT CONNECT AVERAGE = 3234Kbps

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Full duplex has never worked for me.  The tests take forever to load.

:::.. Download Stats ..:::

Connection is:: 11266 Kbps about 11.3 Mbps (tested with 12160 kB)

Download Speed is:: 1375 kB/s

Tested From:: http://www.testmy.net/

Test Time:: Sun Mar 20 17:05:07 PST 2005

Bottom Line:: 201X faster than 56K 1MB download in 0.74 sec

Diagnosis: Awesome! 20% + : 312.52 % faster than the average for host (adelphia.net)

Validation Link:: https://testmy.net/stats/id-E1PQH0G42

:::.. Download Stats ..:::

Connection is:: 7428 Kbps about 7.4 Mbps (tested with 5983 kB)

Download Speed is:: 907 kB/s

Tested From:: http://www.testmy.net/

Test Time:: Sun Mar 20 17:03:00 PST 2005

Bottom Line:: 133X faster than 56K 1MB download in 1.13 sec

Diagnosis: Awesome! 20% + : 171.99 % faster than the average for host (adelphia.net)

Validation Link:: https://testmy.net/stats/id-Y79DVWAES

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