Tweak for Speed

Mastert252 · Post by **Mastert252** » Wed Feb 13, 2002 7:11 pm

Hi everyone, I just recently got my Comcast network up(switched from @home) and I was just wondering if my speeds are as fast as they can be. Here is my information:

Windows 98
Comcast.net Cable Service
256 RAM
RCA CAble Modem
Compaq
DRTCP setting at 513920

Here are the results of my Analyzer test:

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) = 372296
RWIN Scaling (RFC1323) = 3 bits
Unscaled Receive Window = 46537
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: 14891.84 kbps (1861.48 KBytes/s) @ 200ms
Your RcvWindow limits you to: 5956.736 kbps (744.592 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 34 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

Please let me know. Thank you.

Lobo · Post by **Lobo** » Wed Feb 13, 2002 7:14 pm

Download SG Optimizer to your desktop, select connection type at top, select optimal settings at bottom, click on apply changes at very bottom and REBOOT
Select adapter you are using
If you wish to enter custom TCP recieve window select custom settings at bottom, enter what you wish, click on apply changes at bottom and REBOOT.
If you wish to select LAN speedup, click on custom settings, other settings tab at top, LAN speedup=yes.(Faster loading of web pages)
If using Cablenuts adjuster too, you must first bring up adjuster, click on clear all boxes at bottom and reboot, then download and install optimizer.

Optimizer in my signature

Your RWIN is not set to 513920, see above test
extreme settings in Optimizer will set that RWIN

mnosteele52 · Post by **mnosteele52** » Wed Feb 13, 2002 7:15 pm

First do a speed test from Speakeasy, choose the location nearest to you and test, then post you results along with what your caps are from your ISP.

mnosteele52 · Post by **mnosteele52** » Wed Feb 13, 2002 7:16 pm

Lobo, you too fast

Lobo · Post by **Lobo** » Wed Feb 13, 2002 7:19 pm

Comcast CAP is 1.5 down

Lobo · Post by **Lobo** » Wed Feb 13, 2002 8:37 pm

If you have TweakXP installed in your system it will keep changing RWIN back everytime you reboot

Arkie_VI · Post by **Arkie_VI** » Thu Feb 14, 2002 4:02 pm

Comcast capped 1500/128

Lobo, you said "If using Cablenuts adjuster too, you must first bring up adjuster, click on clear all boxes at bottom and reboot, then download and install optimizer. " Don't use cablenut adjuster???

TCP properties for IP = ()
Note: Read the FAQ if the above is not your IP address.
Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; Q312461)

TCP options string = 020405b40103030401010402

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) = 584000
RWIN Scaling (RFC1323) = 4 bits
Unscaled Receive Window = 36500
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: 23360 kbps (2920 KBytes/s) @ 200ms
Your RcvWindow limits you to: 9344 kbps (1168 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 51 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

26343 connections tested since 03.10.2001.
Analyzer version: Beta 0.99

Test running..........
** Speed 1205(down)/125(up) kbps **
(At least 24 times faster than a 56k modem)
Finish.

Lobo · Post by **Lobo** » Thu Feb 14, 2002 4:10 pm

Your RWIN may be to big, try: 513920, 522680, 524176, 531440, 554800

Arkie_VI · Post by **Arkie_VI** » Thu Feb 14, 2002 4:20 pm

Lobo, you said "If using Cablenuts adjuster too, you must first bring up adjuster, click on clear all boxes at bottom and reboot, then download and install optimizer. " Don't use cablenut adjuster???

Lobo · Post by **Lobo** » Thu Feb 14, 2002 4:23 pm

I did not say that, to use Optimizer you must first clear all boxes,
click in my sig SG & Cablenut

Arkie_VI · Post by **Arkie_VI** » Thu Feb 14, 2002 5:16 pm

642400 1234/123 1307/123 1114/116 avg 1218
607360 1128/na 1313/115 1234/116 1225
584000 1201/116 1260/117 1208/114 1223
513920 1147/116 1254/115 1320/116 1240
522680 1221/123 1194/116 1308/115 1241
524176 1083/116 1208/124 1301/115 1197
531440 1237/115 1266/115 1181/116 1237
554800 1199/116 1140/115 1277/116 1205

Lobo · Post by **Lobo** » Thu Feb 14, 2002 6:18 pm

What size CPU do you have and how much RAM

Lobo · Post by **Lobo** » Thu Feb 14, 2002 6:46 pm

Click in my sig on how to do real speed test

Arkie_VI · Post by **Arkie_VI** » Thu Feb 14, 2002 8:47 pm

I'll tester her in morning

Lobo · Post by **Lobo** » Thu Feb 14, 2002 8:54 pm

531440 1237/115 1266/115 1181/116 1237

Do you have 900 or below CPU

Arkie_VI · Post by **Arkie_VI** » Thu Feb 14, 2002 9:13 pm

Check out Sig tag

Lobo · Post by **Lobo** » Thu Feb 14, 2002 9:25 pm

Close, just select fastest for your puter, 554800 I think you will like in real test

Arkie_VI · Post by **Arkie_VI** » Fri Feb 15, 2002 4:34 pm

Test running..........
** Speed 1382(down)/123(up) kbps **
(At least 27 times faster than a 56k modem)
Finish.

Lobo · Post by **Lobo** » Fri Feb 15, 2002 4:38 pm

Thats good for CONcast's Low Speed Network

From CONcast web site:

**Speed comparisons are for downloads only (and are compared to 28.8K dial-up and 640K DSL). Upstream speed limited to 128kbps. Actual speeds may vary and are not guaranteed. Many factors affect download speed. Ask about speed when you call or visit http://www.comcast .com. Not available in all locations. For questions, minimum requirements and complete details about service and prices, call 1.800.COMCAST.

Mastert252 · Post by **Mastert252** » Sun Feb 17, 2002 11:31 am

OK, I installed teh Optimizer and applied setings above. How do I look, can I be faster?

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 = 50 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

Thanks for all the help.

Lobo · Post by **Lobo** » Sun Feb 17, 2002 11:34 am

try: 513920, 522680, 524176, 531440, 554800 , custom settings, Tcp Receive Window