Help Tweaking

[baby0522]

« SpeedGuide.net TCP Analyzer Results »
Tested on: 03.25.2007 03:20
IP address: 218.111.xxx.xx

TCP options string: 020405ac
MSS: 1452
MTU: 1492
TCP Window: 65535 (NOT multiple of MSS)
RWIN Scaling: 0
Unscaled RWIN : 65535
Reccomended RWINs: 63888, 127776, 255552, 511104
BDP limit (200ms): 2621kbps (328KBytes/s)
BDP limit (500ms): 1049kbps (131KBytes/s)
MTU Discovery: ON
TTL: 111
Timestamps: OFF
SACKs: OFF
IP ToS: 00000000 (0)



I using 1mb/384k streamyx .

Modem status - Downstream Rate = 1536 Kbps UpStream Rate = 512 Kbps

Help me tweak and Display the formula of calculate RWIN (? X ?/ 8 ) ... ? Teach me thx :)

[trogers]

« SpeedGuide.net TCP Analyzer Results »
Tested on: 03.25.2007 03:20
IP address: 218.111.xxx.xx

TCP options string: 020405ac
MSS: 1452
MTU: 1492
TCP Window: 65535 (NOT multiple of MSS)
RWIN Scaling: 0
Unscaled RWIN : 65535
Reccomended RWINs: 63888, 127776, 255552, 511104
BDP limit (200ms): 2621kbps (328KBytes/s)
BDP limit (500ms): 1049kbps (131KBytes/s)
MTU Discovery: ON
TTL: 111
Timestamps: OFF
SACKs: OFF
IP ToS: 00000000 (0)



I using 1mb/384k streamyx .

Modem status - Downstream Rate = 1536 Kbps UpStream Rate = 512 Kbps

Help me tweak and Display the formula of calculate RWIN (? X ?/ 8 ) ... ? Teach me thx :)

Have you got your DLink working?

Formula for Bandwidth Delay Product (BDP) is

RWIN = Bandwidth x Max. Latency divided by 8 = 1000 x 500 / 8 = 62500

Make RWIN an even multiple of MSS (or MTU-40)

62500 / MSS = 62500 / 1452 = 43.044

Round it up to the next nearest even number = 44

Use RWIN = MSS x 44 = 1452 x 44 = 63888

Try the following with TCP Optimizer:

General Settings tab:
Custom settings - check
Modify All Network Adapters - check
network adapter selection - your NIC
MTU 1492
TTL - 64
TCP Receive Window - 63888
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Windows Scaling - uncheck
Timestamps - uncheck

Advanced Settings tab:
Max Connections per Server - 10
Max Connections per 1.0 Server - 20
LocalPriority - 1
Host Priority - 1
DNSPriority - 1
NetbtPriority - 1
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 96
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768
Then select "Apply Changes" and reboot to take effect

[baby0522]

Hm ..i buy linksys ,anyway i angry wif that D-link . Firmware Can't update , they give us the link malaysia , i download that but make system fail . so i scared already . I update that firmware cause when i play maplestory game i can't pick item at all .So i try go update firmwared. So i lazy on drive to exchange again . So this Linksys modem i get 1492MTU , 1452 Mss . :) think is ok already summor can pick item when playing maple story .

Sorry for my many question , because i wan learn it :) N trogers u really kind of people .

Bandwidth x Max. Latency divided
- about bandwith , 1mb bandwith not 1024 or is 1000 ?
-about Max Latency , how i get max latency ritely ? Mean how i count it out as 500 ?

Advanced Settings tab:
Max Connections per Server - 10 <- this increase can increase what speed
Max Connections per 1.0 Server - 20 <- n this
LocalPriority - 1 <-
Host Priority - 1 <-
DNSPriority - 1 <-NetbtPriority - 1 <-
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 96 <- that time i teak ask 136 but why now 96 can teach me ? :) how calculateMaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768

[trogers]

Most of your questions are answered in this link:

http://www.speedguide.net/tcpoptimizer.php

As for calculating RWIN, you do not need to be too precise with bandwidth (using 1000 or 1024) as we have rounded up to MSS x 44 instead of MSS x 43.

It is difficult to determine max. latency to websites we frequent as the value changes during different times of the day or night. What I normally do is to determine average latency and then multiply it with a factor of 1.5.

You can test your latency to the US (which is half way around the world) at this link during different times of the day:

http://miranda.ctd.anl.gov:7123/

What you want to know is your round trip time (another term for latency) which is reported under the 'Statistics' button.

[baby0522]

Ok i go read thoos link , n 1024 or 1000 calculate oso 63888 lol . Thx :) Trogers u r speedguide admin ?

[trogers]

Ok i go read thoos link , n 1024 or 1000 calculate oso 63888 lol . Thx :) Trogers u r speedguide admin ?

Oh no. I am just a member of this forum like yourself but I have learnt and am still learning from senior members and just passing on the knowledge.

[baby0522]

really ... but for me u quite pro . Hehe...:) i oo wan become technician , but dunno how :)

[baby0522]

trogers .. i have come back for some little reason .. I done with tweak n get high donwload speed wif Rapidshare server by donwload file . But when i donwload file at download.com , bigfish game server site , n otheri get low speed of it . about not in 10 kb . Why , is that the server page problem , or my tweaking problem . ?

[trogers]

trogers .. i have come back for some little reason .. I done with tweak n get high donwload speed wif Rapidshare server by donwload file . But when i donwload file at download.com , bigfish game server site , n otheri get low speed of it . about not in 10 kb . Why , is that the server page problem , or my tweaking problem . ?

It could be that the server side has had too many connections, depending on the time of day you connected to them.

Post your TCP Analyzer report and we can see if your settings are correct.

[baby0522]

« SpeedGuide.net TCP Analyzer Results »
Tested on: 04.15.2007 03:03
IP address: 60.50.xx.xxx

TCP options string: 020405ac01010402
MSS: 1452
MTU: 1492
TCP Window: 63888 (multiple of MSS)
RWIN Scaling: 0
Unscaled RWIN : 63888
Reccomended RWINs: 63888, 127776, 255552, 511104
BDP limit (200ms): 2556kbps (319KBytes/s)
BDP limit (500ms): 1022kbps (128KBytes/s)
MTU Discovery: ON
TTL: 47
Timestamps: OFF
SACKs: ON
IP ToS: 01100000 (96)
Precedence: 011 (flash)
Delay: 0 (normal delay)
Throughput: 0 (normal throughput)
Reliability: 0 (normal reliability)
Cost: 0 (normal cost)
Check bit: 0 (correct)
DiffServ: CS3 011000 (24) - class 3 (RFC 2474). Similar forwarding behavior to the ToS Precedence field.

[trogers]

Yes, MTU and RWIN are set correctly for 1 mbps @ 500ms latency.

Test your speed at the Malaysian test servers of this link:

http://www.speedtest.net/

[baby0522]

http://www.speedtest.net/result/113458002.png (http://www.speedtest.net)

[trogers]

http://www.speedtest.net/result/113458002.png (http://www.speedtest.net)

Seems StreamyX is raising speed to 1.5 mbps?

[baby0522]

now streamyx come with 2mb download 521 up

[Sava700]

trogers .. i have come back for some little reason .. I done with tweak n get high donwload speed wif Rapidshare server by donwload file . But when i donwload file at download.com , bigfish game server site , n otheri get low speed of it . about not in 10 kb . Why , is that the server page problem , or my tweaking problem . ?

rapid share is often drawing from a Level 3 or just as good if not higher connection..therefore you will get faster downloads. Download.com and others that you mentioned are widely used and will be slower cause they are just not as powerful of a site as rapidshare. Its not your connection or tweaking thats a issue. Tweaking is just that, It won't double your speeds or anything of that nature..your fine where your at.

[trogers]

now streamyx come with 2mb download 521 up

If StreamyX is giving 2 mbps, adjust your TCP Window to 127776 and Window Scaling checked. This will maintain your max. latency at 500ms.

[baby0522]

But i using 1mb packages only :) not really need 2mb line .. N izzit window scaling only enable when RWINs over 65536 ?

[trogers]

But i using 1mb packages only :) not really need 2mb line .. N izzit window scaling only enable when RWINs over 65536 ?

For XP SP2 Window Scaling is turned on automatically when RWIN is 65536 or more. For other earlier WIN system, it has to be set manually.

[baby0522]

ok .. Then i reading TOS from speedguide , but not really understand what mean about it , sometimes 80 , 96 , 136 etc .. How to know what code should i put n what it mean . :) thx.

[trogers]

ok .. Then i reading TOS from speedguide , but not really understand what mean about it , sometimes 80 , 96 , 136 etc .. How to know what code should i put n what it mean . :) thx.

Best for you to search Google to read up on Terms of Service (ToS) and Diff Serv.

[baby0522]

i got search b4 i post question here .. But :) still dunno what use this setting .

[trogers]

i got search b4 i post question here .. But :) still dunno what use this setting .

Each intermediate router or gateway in a network along a signal path will face a queue of signal packets. During heavy traffic when signal queue is long, some signal packets may not be send through, but will be discarded while others are sent through.

ToS and Diff Serv is a system of code in your signal packet that specify the traffic priority of your packet (normal, immediate or flash override, etc) so that your packets have a better chance to jump the queue and be sent through.

You can experiment on the number (80, 92, 96, 104, 136, 240) to use and see which suits your ISP's network.

[baby0522]

then how i know which TOS ISP's network code should i use it ?

[trogers]

then how i know which TOS ISP's network code should i use it ?

Use TCP Optimizer with each value, reboot comp and surf with your browser. See the different speeds in web page loading, especially those that have lots of graphics. Keep the value that suits your connection.

[baby0522]

oooh ... TOS for loading webpage faster .. Thx . :) Mostly will be 80 - 136 value right ? then 240 vaue is the best ?

[natri23]

« SpeedGuide.net TCP Analyzer Results »
Tested on: 01.22.2008 01:04
IP address: 117.5.xx.xx

TCP options string: 0204059801010402
MSS: 1432
MTU: 1472
TCP Window: 63008 (multiple of MSS)
RWIN Scaling: 0
Unscaled RWIN : 63008
Reccomended RWINs: 63008, 126016, 252032, 504064
BDP limit (200ms): 2520kbps (315KBytes/s)
BDP limit (500ms): 1008kbps (126KBytes/s)
MTU Discovery: OFF
TTL: 43
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

I'm using 1536/768kbs ADSL connection. Can you help me optimize with CableNut???