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Posted: Thu May 21, 2009 1:23 am
by Rollingstone
Get 490 kbps from 512 kbps ! I'd say your speed is optimum !

Posted: Thu May 21, 2009 9:18 am
by derupedo
but why do i see some guys claiming to reach 100+ kb/s download using the same internet package? oh well. thanks anyway :)

Posted: Thu May 21, 2009 6:52 pm
by Rollingstone
but why do i see some guys claiming to reach 100+ kb/s download using the same internet package?
Downstream/Upstream have been set incorectly by ISP in your modem/router so they can get higher kbps !

PLDT tweaks

Posted: Fri May 22, 2009 3:06 pm
by kriscyme
« SpeedGuide.net TCP Analyzer Results »
Tested on: 05.22.2009 15:04
IP address: 122.53.xxx.xxx
Guru,

I paid 1mbps for my ISP which is PLDT mydsl but ive got a slow upload speed when i test it running .50kbps can this still be improve? please do help me with this issue.

thanks

Im using a linksys router BEFSR41



Client OS: Windows XP

TCP options string: 020405ac0103030001010402
MSS: 1452
MTU: 1492
TCP Window: 65340 (multiple of MSS)
RWIN Scaling: 0 bits
Unscaled RWIN : 65340
Recommended RWINs: 63888, 127776, 255552, 511104, 1022208
BDP limit (200ms): 2614kbps (327KBytes/s)
BDP limit (500ms): 1045kbps (131KBytes/s)
MTU Discovery: ON
TTL: 46
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

Posted: Fri May 22, 2009 8:15 pm
by Rollingstone
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
Windows Scaling - uncheck
TCP Receive Window - 63888
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Timestamps - uncheck

Advanced Settings tab:
Max Connections per Server - 10
Max Connections per 1.0 Server - 10
LocalPriority - 5
Host Priority - 6
DNSPriority - 7
NetbtPriority - 8
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 80
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768

Posted: Fri May 22, 2009 9:44 pm
by derupedo
Rollingstone wrote:Downstream/Upstream have been set incorectly by ISP in your modem/router !
well what can i do with this? do i gotta call them?

Posted: Sun May 31, 2009 8:15 am
by azetect
please help me too..my connection not stable because of my ping every second goes 30-150 to rapidshare.com..last time i got very stable ping since my country broadband getting lousy service .

« SpeedGuide.net TCP Analyzer Results »
Tested on: 05.31.2009 08:06
IP address: 60.49.xxx.xxx
Client OS: Windows XP

TCP options string: 020405ac01010402
MSS: 1452
MTU: 1492
TCP Window: 65535 (NOT multiple of MSS)
RWIN Scaling: 0 bits
Unscaled RWIN : 65535
Recommended RWINs: 63888, 127776, 255552, 511104, 1022208
BDP limit (200ms): 2621kbps (328KBytes/s)
BDP limit (500ms): 1049kbps (131KBytes/s)
MTU Discovery: ON
TTL: 118
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

Posted: Thu Jun 04, 2009 8:59 am
by gembor
i need advice to optimize my connection

i'm used dial up conection
my network only 3G,i'm used phone modem(se w950i),
this result for speedtest.net Image « SpeedGuide.net TCP Analyzer Results »
Tested on: 06.03.2009 00:22
IP address: 202.93.xx.xx
Client OS: Windows XP

TCP options string: 0204059e0103030001010402
MSS: 1438
MTU: 1478
TCP Window: 21440 (NOT multiple of MSS)
RWIN Scaling: 0 bits
Unscaled RWIN : 21440
Recommended RWINs: 63272, 126544, 253088, 506176, 1012352
BDP limit (200ms): 858kbps (107KBytes/s)
BDP limit (500ms): 343kbps (43KBytes/s)
MTU Discovery: ON
TTL: 19
Timestamps: OFF
SACKs: ON
IP ToS: 01001000 (72)
Precedence: 010 (immediate)
Delay: 0 (normal delay)
Throughput: 1 (low throughput)
Reliability: 0 (normal reliability)
Cost: 0 (normal cost)
Check bit: 0 (correct)
DiffServ: AF21 010010 (18) - Assured Forwarding class 2, low drop precedence (RFC 2597)

Posted: Thu Jun 04, 2009 9:02 am
by gembor
i need advice to optimize my connection

i'm used dial up conection
my network only 3G,i'm used phone modem(se w950i),
this result for speedtest.net Image « SpeedGuide.net TCP Analyzer Results »
Tested on: 06.03.2009 00:22
IP address: 202.93.xx.xx
Client OS: Windows XP

TCP options string: 0204059e0103030001010402
MSS: 1438
MTU: 1478
TCP Window: 21440 (NOT multiple of MSS)
RWIN Scaling: 0 bits
Unscaled RWIN : 21440
Recommended RWINs: 63272, 126544, 253088, 506176, 1012352
BDP limit (200ms): 858kbps (107KBytes/s)
BDP limit (500ms): 343kbps (43KBytes/s)
MTU Discovery: ON
TTL: 19
Timestamps: OFF
SACKs: ON
IP ToS: 01001000 (72)
Precedence: 010 (immediate)
Delay: 0 (normal delay)
Throughput: 1 (low throughput)
Reliability: 0 (normal reliability)
Cost: 0 (normal cost)
Check bit: 0 (correct)
DiffServ: AF21 010010 (18) - Assured Forwarding class 2, low drop precedence (RFC 2597)

Posted: Sun Jun 07, 2009 10:43 pm
by erojiraiya
help me to optimize my connection these are my ip analyzer results:

« SpeedGuide.net TCP Analyzer Results »
Tested on: 06.07.2009 22:37
IP address: 122.53.xxx.xxx
Client OS: Windows XP

TCP options string: 020405b401010402
MSS: 1460
MTU: 1500
TCP Window: 65535 (NOT multiple of MSS)
RWIN Scaling: 0 bits
Unscaled RWIN : 65535
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 2621kbps (328KBytes/s)
BDP limit (500ms): 1049kbps (131KBytes/s)
MTU Discovery: ON
TTL: 111
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

Posted: Mon Dec 21, 2009 9:10 am
by marinutsu
heres mine.. how can i increase my bandwidth? thanks for your help guru.

« SpeedGuide.net TCP Analyzer Results »
Tested on: 12.21.2009 09:02
IP address: 122.53.xxx.xx
Client OS: Windows 7

TCP options string: 020405b40103030201010402
MSS: 1460
MTU: 1500
TCP Window: 65700 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 16425
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 2628kbps (329KBytes/s)
BDP limit (500ms): 1051kbps (131KBytes/s)
MTU Discovery: ON
TTL: 108
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

Posted: Mon Dec 21, 2009 9:06 pm
by trogers
marinutsu wrote:heres mine.. how can i increase my bandwidth? thanks for your help guru.

« SpeedGuide.net TCP Analyzer Results »
Tested on: 12.21.2009 09:02
IP address: 122.53.xxx.xx
Client OS: Windows 7

TCP options string: 020405b40103030201010402
MSS: 1460
MTU: 1500
TCP Window: 65700 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 16425
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 2628kbps (329KBytes/s)
BDP limit (500ms): 1051kbps (131KBytes/s)
MTU Discovery: ON
TTL: 108
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)
Please make your own thread for assistance.

Posted: Mon Dec 21, 2009 9:10 pm
by marinutsu
my connection is also pldt mydsl

Posted: Mon Dec 21, 2009 10:10 pm
by trogers
marinutsu wrote:my connection is also pldt mydsl
Click here:

http://forums.speedguide.net/newthread. ... hread&f=54

You are using Win 7.

Tell us what speed you paid to get.

Also, do some speedtest and post.

Posted: Mon Dec 21, 2009 10:49 pm
by marinutsu
thanks a lot sir

Posted: Wed Mar 03, 2010 8:01 am
by xtreme-jodi
pls help optimize my pldt mydsl connection


[img][IMG]http://www.speedtest.net/result/735603627.png[/img][/IMG]
« SpeedGuide.net TCP Analyzer Results »
Tested on: 03.03.2010 07:57
IP address: 112.201.xxx.xxx
Client OS: Windows XP
pls help optimize my pldt mydsl connection


TCP options string: 020405b40103030201010402
MSS: 1460
MTU: 1500
TCP Window: 256960 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 64240
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 10278kbps (1285KBytes/s)
BDP limit (500ms): 4111kbps (514KBytes/s)
MTU Discovery: ON
TTL: 48
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

Posted: Sun Jul 18, 2010 8:40 am
by slasher
kindly help optimize my setting. here is my info. thanks

« SpeedGuide.net TCP Analyzer Results »
Tested on: 07.18.2010 08:39
IP address: 122.52.xx.x
Client OS: Windows XP

TCP options string: 020405b401010402
MSS: 1460
MTU: 1500
TCP Window: 65535 (NOT multiple of MSS)
RWIN Scaling: 0 bits
Unscaled RWIN : 65535
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 2621kbps (328KBytes/s)
BDP limit (500ms): 1049kbps (131KBytes/s)
MTU Discovery: ON
TTL: 116
Timestamps: OFF
SACKs: ON
IP ToS: 10111000 (184)
Precedence: 101 (CRITIC/ECP)
Delay: 1 (low delay)
Throughput: 1 (high throughput)
Reliability: 0 (normal reliability)
Cost: 0 (normal cost)
Check bit: 0 (correct)
DSCP (DiffServ): EF PHB 101110 (46) - Expedited Forwarding (recommended for video/audio - high priority, higher drop probability). See RFC 2598.

Posted: Thu Sep 30, 2010 5:26 am
by Kimark
Can anyone help me tweak my internet connection?
I'm having problems with my connection coz somethings i got DC or lag in online games..

here's my tcp/ip analyzer report

« SpeedGuide.net TCP Analyzer Results »
Tested on: 09.30.2010 05:22
IP address: 119.93.xxx.xxx
Client OS: Windows XP

TCP options string: 020405ac0103030201010402
MSS: 1452
MTU: 1492
TCP Window: 261360 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 65340
Recommended RWINs: 63888, 127776, 255552, 511104, 1022208
BDP limit (200ms): 10454kbps (1307KBytes/s)
BDP limit (500ms): 4182kbps (523KBytes/s)
MTU Discovery: ON
TTL: 47
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)


thanks in advance

Posted: Fri Apr 15, 2011 9:50 pm
by ambangis
can u guys help me too..??
here aremy results..

« SpeedGuide.net TCP Analyzer Results »
Tested on: 04.15.2011 21:49
IP address: 112.200.xxx.xxx
Client OS: Windows 7

TCP options string: 020405b40103030801010402
MSS: 1460
MTU: 1500
TCP Window: 65536 (NOT multiple of MSS)
RWIN Scaling: 8 bits (2^8=256)
Unscaled RWIN : 256
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 2621kbps (328KBytes/s)
BDP limit (500ms): 1049kbps (131KBytes/s)
MTU Discovery: ON
TTL: 47
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)



im also using pldt mydsl

Posted: Sun Aug 14, 2011 11:08 am
by lufer07
Good day to you guys, i am new here and i just recently learned about this site and how awesome people here when it comes to optimizing speeds with internet connections. Hoping you guys could do the same for me. thanks in advance!


« SpeedGuide.net TCP Analyzer Results »
Tested on: 08.14.2011 10:56
IP address: 112.208.xxx.xxx
Client OS: Windows 7

TCP options string: 020405b40103030201010402
MSS: 1460
MTU: 1500
TCP Window: 17520 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 4380
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 701kbps (88KBytes/s)
BDP limit (500ms): 280kbps (35KBytes/s)
MTU Discovery: ON
TTL: 105
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

Posted: Sun Apr 20, 2014 9:13 am
by CyberFree
« SpeedGuide.net TCP Analyzer Results »
Tested on: 2014.04.20 09:08
IP address: 125.60.xxx.xxx
Client OS/browser: Windows 7 (Chrome 34.0.1847.116)

TCP options string: 0204055001010402
MSS: 1360
MTU: 1400
TCP Window: 17680 (multiple of MSS)
RWIN Scaling: 0 bits
Unscaled RWIN : 17680
Recommended RWINs: 65280, 130560, 261120, 522240, 1044480
BDP limit (200ms): 707kbps (88KBytes/s)
BDP limit (500ms): 283kbps (35KBytes/s)
MTU Discovery: ON
TTL: 43
Timestamps: OFF
SACKs: ON
IP ToS: 00101000 (40)
Precedence: 001 (priority)
Delay: 0 (normal delay)
Throughput: 1 (high throughput)
Reliability: 0 (normal reliability)
Cost: 0 (normal cost)
Check bit: 0 (correct)
DSCP (DiffServ): AF11 001010 (10) - Assured Forwarding class 1, low drop precedence (RFC 2597).


configuration please :)

Posted: Sun Apr 20, 2014 9:14 am
by CyberFree
« SpeedGuide.net TCP Analyzer Results »
Tested on: 2014.04.20 09:08
IP address: 125.60.xxx.xxx
Client OS/browser: Windows 7 (Chrome 34.0.1847.116)

TCP options string: 0204055001010402
MSS: 1360
MTU: 1400
TCP Window: 17680 (multiple of MSS)
RWIN Scaling: 0 bits
Unscaled RWIN : 17680
Recommended RWINs: 65280, 130560, 261120, 522240, 1044480
BDP limit (200ms): 707kbps (88KBytes/s)
BDP limit (500ms): 283kbps (35KBytes/s)
MTU Discovery: ON
TTL: 43
Timestamps: OFF
SACKs: ON
IP ToS: 00101000 (40)
Precedence: 001 (priority)
Delay: 0 (normal delay)
Throughput: 1 (high throughput)
Reliability: 0 (normal reliability)
Cost: 0 (normal cost)
Check bit: 0 (correct)
DSCP (DiffServ): AF11 001010 (10) - Assured Forwarding class 1, low drop precedence (RFC 2597).


configuration please :)

Posted: Sun Apr 20, 2014 9:37 am
by KEiGHT
Why do you spam with the same request twice? :)

What configuration do you want for ?
Windows 7-8-8.1 (32-64-bits)

Posted: Sun Apr 20, 2014 9:45 am
by CyberFree
KEiGHT wrote:Why do you spam with the same request twice? :)

What configuration do you want for ?
Windows 7-8-8.1 (32-64-bits)
im running windows 7 Home premium..
sorry for the double post due to slow internet connection

Posted: Sun Apr 20, 2014 10:57 am
by KEiGHT
And what improve do you need especially ?
Tell us your bandwith DLD / UPLD

or you can test these settings down below (click Custom first) / Apply \restart PC;

First TAB (General Settings)
Image

Second TAB (Advanced Settings)
Image

good luck !

Posted: Sun Apr 20, 2014 9:55 pm
by CyberFree
KEiGHT wrote:And what improve do you need especially ?
Tell us your bandwith DLD / UPLD

or you can test these settings down below (click Custom first) / Apply \restart PC;

First TAB (General Settings)
Image

Second TAB (Advanced Settings)
Image

good luck !



DONE this already sir.. I basically wanted to to increase my downstream and upstream.. latency also sometimes not stable

speedtest:
http://www.speedtest.net/result/3451630483.png

pingtest:
http://www.pingtest.net/result/96252203.png

tcp analyzer

« SpeedGuide.net TCP Analyzer Results »
Tested on: 2014.04.20 21:55
IP address: 125.60.xxx.xxx
Client OS/browser: Windows 7 (Chrome 34.0.1847.116)

TCP options string: 0204055001010402
MSS: 1360
MTU: 1400
TCP Window: 17680 (multiple of MSS)
RWIN Scaling: 0 bits
Unscaled RWIN : 17680
Recommended RWINs: 65280, 130560, 261120, 522240, 1044480
BDP limit (200ms): 707kbps (88KBytes/s)
BDP limit (500ms): 283kbps (35KBytes/s)
MTU Discovery: ON
TTL: 43
Timestamps: OFF
SACKs: ON
IP ToS: 00101000 (40)
Precedence: 001 (priority)
Delay: 0 (normal delay)
Throughput: 1 (high throughput)
Reliability: 0 (normal reliability)
Cost: 0 (normal cost)
Check bit: 0 (correct)
DSCP (DiffServ): AF11 001010 (10) - Assured Forwarding class 1, low drop precedence (RFC 2597).


^_^

Posted: Tue Apr 22, 2014 2:25 pm
by KEiGHT
Windows Registry Editor Version 5.00

[HKEY_USERS\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"MaxConnectionsPerServer"=dword:00000010
"MaxConnectionsPer1_0Server"=dword:00000010

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
"MaxConnectionsPerServer"=dword:00000010
"MaxConnectionsPer1_0Server"=dword:00000010

[HKEY_CURRENT_USER\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Internet Settings]
"MaxConnectionsPer1_0Server"=dword:00000010
"MaxConnectionsPerServer"=dword:00000010

Posted: Wed Jun 18, 2014 10:29 am
by tetenyi
Hi,

On the link below shows the set of settings that we tried unfortunately, without any success.
You help or guidance is much appreciated.

https://docs.google.com/document/d/1IGI ... sp=sharing

Best regards,
Istvan

Posted: Wed Jun 18, 2014 11:39 am
by KEiGHT
Run cmd,.exe as administrator and copy /paste then hit ENTER for each one in part !
or create a batch and run them all together !

netsh int ip set global taskoffload=enabled
netsh int tcp set global chimney=automatic
netsh int tcp set heuristics wsh=disabled
netsh int tcp set global autotuninglevel=highlyrestricted
netsh int tcp set global congestionprovider=ctcp
netsh int tcp set global ecncapability=enabled
netsh int tcp set global netdma=enabled
netsh int tcp set global dca=enabled
netsh int tcp set global rss=enabled

Posted: Wed Jun 18, 2014 1:16 pm
by tetenyi
Many thanks. It will be tested Thursday morning only.

Posted: Thu Jun 19, 2014 1:38 pm
by tetenyi
tetenyi wrote:Many thanks. It will be tested Thursday morning only.
Unfortunately, the performance has not been improved.

The good news is that I found an interesting presentation: http://sharkfest.wireshark.org/sharkfest.12/presentations/A-3_A-10_Tuning_Win7_Using_Wireshark_TCP_Stream_Graph_a_Case_Study.pdf

Posted: Thu Jun 19, 2014 3:20 pm
by KEiGHT
So, that presentation, had improved your performance ?

Posted: Fri Jun 20, 2014 12:59 am
by tetenyi
KEiGHT wrote:So, that presentation, had improved your performance ?
No it did not, but this is very clear in presenting the problem.
I still at square one, with lots of tests, and configs with Windows PC-s the perform poorly with TCP. Meanwhile, any Linux is 30 times faster. ;)

Posted: Fri Jun 20, 2014 2:40 am
by KEiGHT
do as I said before along with this registry and you'll see a real improvement!

netsh int tcp set heuristics wsh=disabled
netsh int tcp set global autotuninglevel=highlyrestricted
netsh int tcp set global congestionprovider=ctcp

Code: Select all

Windows Registry Editor Version 5.00

; Enable Window Scaling

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Tcpip\Parameters]
"Tcp1323Opts"=dword:00000001

; Enable Congestion Provide(CTCP) and ENC Capabilities

[code]
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Nsi\{eb004a03-9b1a-11d4-9123-0050047759bc}\0]
"0200"=hex:01,00,00,00,01,00,00,07,00,dd,6d,00,e8,03,00,00,1e,00,00,00,00,00,\
  00,00,00,00,00,00,02,00,00,00,03,00,00,00,00,00,00,00,ff,00,ff,ff,ff,ff,ff,\
  ff,ff,ff,ff,ff,ff,ff,ff,ff,ff,ff,ff,ff,00,00,00,00,00,00,00,00,ff,ff,00,00,\
  ff,ff,ff,ff,00,00,00,00
"1700"=hex:00,00,00,00,01,00,00,00,00,dd,6d,00,00,00,00,00,00,00,00,00,00,00,\
  00,00,00,00,00,00,02,00,00,00,03,00,00,00,00,00,00,00,00,00,00,00,ff,ff,ff,\
  00,ff,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,ff,00,00,00,\
  ff,ff,ff,ff,00,00,00,00
RWIN is a multiple of MSS if autotuninglevel=highlyrestricted is set along with Tcp1323Opts=1

Posted: Thu Jun 26, 2014 3:27 am
by tetenyi
KEiGHT wrote:do as I said before along with this registry and you'll see a real improvement!

netsh int tcp set heuristics wsh=disabled
netsh int tcp set global autotuninglevel=highlyrestricted
netsh int tcp set global congestionprovider=ctcp

Code: Select all

Windows Registry Editor Version 5.00

; Enable Window Scaling

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Tcpip\Parameters]
"Tcp1323Opts"=dword:00000001

; Enable Congestion Provide(CTCP) and ENC Capabilities

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Nsi\{eb004a03-9b1a-11d4-9123-0050047759bc}\0]
"0200"=hex:01,00,00,00,01,00,01,07,00,dd,6d,00,e8,03,00,00,1e,00,00,00,00,00,\
  00,00,00,00,00,00,02,00,00,00,00,00,00,00,00,00,00,00,ff,00,ff,00,ff,ff,ff,\
  ff,ff,ff,ff,ff,ff,ff,ff,ff,ff,ff,ff,ff,00,00,00,00,00,00,00,00,ff,ff,00,00,\
  ff,ff,ff,ff,00,00,00,00
"1700"=hex:00,00,00,00,01,00,01,00,00,dd,6d,00,00,00,00,00,00,00,00,00,00,00,\
  00,00,00,00,00,00,02,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,ff,ff,ff,\
  00,ff,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,ff,00,00,00,\
  ff,ff,ff,ff,00,00,00,00
RWIN is a multiple of MSS if autotuninglevel=highlyrestricted is set along with Tcp1323Opts=1
It was tried on a machine. You can see the results.
Before: http://www.speedtest.net/my-result/3586775094
After: http://www.speedtest.net/my-result/3586835086

The circuit is 155Mbps capacity - full duplex.
The circuit was loaded only by 60Mbps download

Posted: Thu Jun 26, 2014 7:05 am
by RaisinCain
Contact your ISP.

Posted: Thu Jun 26, 2014 1:11 pm
by tetenyi
Sorry, I am the ISP. ;)

Posted: Thu Jun 26, 2014 4:00 pm
by RaisinCain
tetenyi wrote:Sorry, I am the ISP. ;)
So you own an company like Comcast, or Time Warner or Cox and are providing internet connectivity to others? :rolleyes:

Posted: Thu Jun 26, 2014 10:30 pm
by tetenyi
RaisinCain wrote:So you own an company like Comcast, or Time Warner or Cox and are providing internet connectivity to others? :rolleyes:
My role is that of a support engineer at an ISP. ;)

I think I have found one more difference I have not checked earlier. The windows machines in question are using 64 bit version of Windows.