SG Broadband Community

TCP options string= 020405b4010303030101080a000000000000000001010402

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1448, which is less than MSS because of Timestamps, or other TCP/IP options used.

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 = 21 hops
TTL value is ok.

Timestamps (RFC1323) = ON
Note: Timestamps add 12 bytes to the TCP header of each packet, reducing the space available for useful data.

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

Turn timestamps off and use one of the following RWIN:

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)

Originally posted by cablenut
Turn timestamps off and use one of the following RWIN:

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)

which one would you choose and how do I change this I used to know but I forgot

To turn timestamps off set Tcp1323Opts to "1" or "0"

I would use 64240 (MSS x 44) because if you used the bigger ones they would be scaled down to 64240 anyway.

cablenut I mean what program do I use

Well you can do it through the cablenut adjuster...

I am not very good at this need more help

It's easy sir, just follow the directions on help page below in signature, you'll be fine

when I change my rwin and turn my timestamps off do I have set all the other options to.

OK, First tell me OS system specs and this:
Please click in my signature where it says Test your tweak here, then:
At top where it says edit click and select, Select all,
Then go back to same edit button at top, click and select copy.
Come back to Speedguide, same thread you were on, in post reply box, with cursor blinking at begining of box go to top, edit, click, select paste, click, this will put information in box. Please X out your IP address, Thank you.

ok I am using windows 2000 pro

TCP options string = 020405b4010303030101080a000000000000000001010402

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1448, which is less than MSS because of Timestamps, or other TCP/IP options used.

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 = 21 hops
TTL value is ok.

Timestamps (RFC1323) = ON
Note: Timestamps add 12 bytes to the TCP header of each packet, reducing the space available for useful data.

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

Whose patch is this belong to

I don't know speedmedic I think I haven't installed any patches for about 6 months

OK follow instructions on help page in my signature, nothing else just directions, I have to leave and watch boxing at 7:30 PM CST so I probably won't be here when you return, but I will be here tomorrow, so you can do this tonight and we will set RWIN in morning or however you want sir

TCP options string = 020405b40103030201010402

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) = 256960
RWIN Scaling (RFC1323) = 2 bits
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)

bandwidth * delay product:
Your RcvWindow limits you to: 10278.4 kbps (1284.8 KBytes/s) @ 200ms
Your RcvWindow limits you to: 4111.36 kbps (513.92 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 53 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

Here you go Lobo or anyone else

bump

OK patch is in, good job, now leave me the size of your CPU in Mhz you we can set your RWIN (Default Receive Window)

CPU (Central Processing Unit)

I'm here tell me

PIII 500mhz

Is it a 333, a 350, a 400, a 433, a 450, a 500, a 550, a 600 and so on

I Forgot, how much RAM

Intel PIII 500MHz/100MHz
40gig HDD & 8.4gig HDD (Both 5400rpm)
192meg PC133
8x LG DVD ROM
52x Creative CD ROM
HP 8200i CD-Writer Plus(Multiread)
Sound Blaster 64v PCI
TNT2 32meg M64 NVidia Graphics card(AGP)
17" Dell Ultrascan Monitor
Surfboard 4100 Cable Modem
Running Win2k

This you go Lobo

Try these RWIN's (Default Rvc Window)
1 at a time in box on adjuster inside 4.0 on desktop. GlobalmaxTcpWindowSize, TcpWindowSize and Default ReceiveWindow must all contain same number (RWIN), Please try these after you take out number thats there now, try:438000, 449680, 470120 or 481800
I left you a few to try to see which one is fastest for you, it goes in 3 places on adjuster inside 4.2 on your desktop, you may wish to test your speed




Save to registry at bottom and reboot each time you change value in adjuster, check analyzer here to be sure RWIN is in

Speedtest below



here

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 = 11 hops
There are less than 16 hops left before your packet is discarded, consider increasing your TTL value

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000




3643 connections tested since 03.10.2001.
Analyzer version: Beta 0.99


*****
AMD 500MHZ/100MHZ
224 RAM
Win2k Pro
RR
1900 kbits/s down & 965 Kbits/s up on the pcpitstop test.

Any suggestions for TTL value ?
Lobo, any suggestions for me ?

thanks

yea forgot to mention my download and upload were 3300 kb/s and 400 kb/s respectively b4 i used cyber2000 tweak for win2k. now im gettin more upload but less down.

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) = 438000
RWIN Scaling (RFC1323) = 3 bits
Unscaled Receive Window = 54750
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: 17520 kbps (2190 KBytes/s) @ 200ms
Your RcvWindow limits you to: 7008 kbps (876 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 53 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

----------------------------------------

372kbps 7x faster than a 56k modem

getting faster 561kbps 11x faster than a 56k

JLR, try all RWIN's during daytime to see which is fastest for you

Orbitz, Follow directions on help page below exactly in signature, I know whose patch that is and it will be uninstalled by following directions on help page, then we will set your RWIN, will you be faster, easy answer, YES

TCP options string = 020405b401010402

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) = 63184
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 63184
For optimum performance, consider changing RWIN to 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: 2527.36 kbps (315.92 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1010.944 kbps (126.368 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 27 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000




6423 connections tested since 03.10.2001.
Analyzer version: Beta 0.99


here it is Lobo. I did everything it said on the help page. installed all the ccs files from the cablenut.

It saids nothing on help page about ccs files, start over, exactly what it says, you can't load ccs files and our patch too

PIII 733
256 RAM
20 G 7200 RPM
Win 98SE
@home (Shaw)

This is my data after trying cablenuts program. Is this any good? Can I improve on this? And what is RWIN and how can I change it?


TCP options string = 020405b40103030101010402

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) = 128480
RWIN Scaling (RFC1323) = 1 bits
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)

bandwidth * delay product:
Your RcvWindow limits you to: 5139.2 kbps (642.4 KBytes/s) @ 200ms
Your RcvWindow limits you to: 2055.68 kbps (256.96 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 33 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000



Thanks again if anyone can shed light on this.

Shed light on what, you did not follow the directions, patch is in

TCP options string = 020405b40103030201010402

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) = 256960
RWIN Scaling (RFC1323) = 2 bits
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)

bandwidth * delay product:
Your RcvWindow limits you to: 10278.4 kbps (1284.8 KBytes/s) @ 200ms
Your RcvWindow limits you to: 4111.36 kbps (513.92 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 43 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000




6606 connections tested since 03.10.2001.
Analyzer version: Beta 0.99


now ?

Orbitz, to many people on this thread, they need to start their own,
Try these RWIN's (Default Rvc Window)
1 at a time in box on adjuster inside 4.0 on desktop. GlobalmaxTcpWindowSize, TcpWindowSize and Default ReceiveWindow must all contain same number (RWIN), Please try these after you take out number thats there now, try: 449680, 470120 or 481800




Save to registry at bottom and reboot each time you change value in adjuster, check analyzer here to be sure RWIN is in

Win2x only

smokin, Start your own thread, I'm getting confused with so many on someone else's
Try these RWIN's (Default Rvc Window)
1 at a tine in box on adjuster inside 4.2 on desktop. GlobalmaxTcpWindowSize-BLANK
Save to registry at bottom and reboot each time you change value in adjuster
Check analyzer here at Speedguide to be sure you have RWIN in, thank you
Try: 513920, 522680 or 524176

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) = 470120
RWIN Scaling (RFC1323) = 3 bits
Unscaled Receive Window = 58765
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: 18804.8 kbps (2350.6 KBytes/s) @ 200ms
Your RcvWindow limits you to: 7521.92 kbps (940.24 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 43 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

...
that's the best out of those three RWINs

All looks fine, good job, read on help page below in sig, 2nd page how to do speed test plus look at Tips
64 more megs of RAM you can raise RWIN to 481800, faster

but my speed was faster when i was using the cyber2000 and RR tweaks. It's was 3000 + / 960 down and up on the pcpitstop
Now it's like 1700 / 425 with T1 test.

Run whole test at PCpitstop and click on internet at end
that 50KB test is to small and means nothing