Settings not updating

[CrimsonSmear]

I seem to be missing something, I cannot get the TCP Window (or the IP ToS) to change manually or with TCPOptimizer

My ISP is Earthlink Cable and I believe it is a 7MBs connection

« SpeedGuide.net TCP Analyzer Results »
Tested on: 11.28.2007 13:41
IP address: 72.40.xx.xxx

TCP options string: 020405b40103030201010402
MSS: 1460
MTU: 1500
TCP Window: 257856 (NOT multiple of MSS)
RWIN Scaling: 2
Unscaled RWIN : 64464
Reccomended RWINs: 64240, 128480, 256960, 513920
BDP limit (200ms): 10314kbps (1289KBytes/s)
BDP limit (500ms): 4126kbps (516KBytes/s)
MTU Discovery: ON
TTL: 55
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

[trogers]

What operating system are you using?

[CrimsonSmear]

Windows XP Pro

[trogers]

First try using WinSockFix to revert settings to Windows Default:

http://www.softpedia.com/get/Tweak/Network-Tweak/WinSockFix.shtml

After reboot, post a new TCP Analyzer report. Using XP SP2?

[CrimsonSmear]

Yes, the opertaing system is XP SP2.


Here are the results after the reboot (without any tinkering):

« SpeedGuide.net TCP Analyzer Results »
Tested on: 11.28.2007 16:05
IP address: 72.40.xx.xxx

TCP options string: 020405b401010402
MSS: 1460
MTU: 1500
TCP Window: 16432 (NOT multiple of MSS)
RWIN Scaling: 0
Unscaled RWIN : 16432
Reccomended RWINs: 64240, 128480, 256960, 513920
BDP limit (200ms): 657kbps (82KBytes/s)
BDP limit (500ms): 263kbps (33KBytes/s)
MTU Discovery: ON
TTL: 119
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

http://www.speedtest.net/result/206857421.png (http://www.speedtest.net)

[trogers]

Try the following with TCP Optimizer:

General Settings tab:
Custom settings - check
Modify All Network Adapters - check
network adapter selection - your NIC
MTU 1500
TTL - 64
TCP Receive Window - 256960
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Windows Scaling - checked
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 - 0
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768
Then select "Apply Changes" and reboot to take effect

After reboot, post a new TCP Analyzer report.

[CrimsonSmear]

My speeds have drastically increased but I have two questions:
1) Why does my TCP Window post as NOT multiple of MSS
2) Is IP ToS dictated by the ISP

Here are the new results:

« SpeedGuide.net TCP Analyzer Results »
Tested on: 11.29.2007 07:58
IP address: 72.40.xx.xxx

TCP options string: 020405b40103030201010402
MSS: 1460
MTU: 1500
TCP Window: 257856 (NOT multiple of MSS)
RWIN Scaling: 2
Unscaled RWIN : 64464
Reccomended RWINs: 64240, 128480, 256960, 513920
BDP limit (200ms): 10314kbps (1289KBytes/s)
BDP limit (500ms): 4126kbps (516KBytes/s)
MTU Discovery: ON
TTL: 55
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

http://www.speedtest.net/result/207047795.png (http://www.speedtest.net)

[trogers]

Rerun the settings I gave and ensure TCP Receive Window is set to 256960.

[CrimsonSmear]

Still no change with the TCP Window, which is the main reason for this post... it seems like I'm missing something, I just can't figure what it may be.

« SpeedGuide.net TCP Analyzer Results »
Tested on: 11.29.2007 10:07
IP address: 72.40.xx.xxx

TCP options string: 020405b40103030201010402
MSS: 1460
MTU: 1500
TCP Window: 257856 (NOT multiple of MSS)
RWIN Scaling: 2
Unscaled RWIN : 64464
Reccomended RWINs: 64240, 128480, 256960, 513920
BDP limit (200ms): 10314kbps (1289KBytes/s)
BDP limit (500ms): 4126kbps (516KBytes/s)
MTU Discovery: ON
TTL: 55
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

[trogers]

What upload speed is your ISP giving you?

[CrimsonSmear]

http://www.speedtest.net/result/207096650.png (http://www.speedtest.net)

[trogers]

Download Cablenut from this link : www.cablenut.com

Run Cablenut and enter the following fields only while leaving all other fields a blank or at existing values:

DefaultReceiveWindow - 256960
DefaultSendWindow - 65536

Save and click apply, and then reboot comp and post a new TCP Analyzer report.

[CrimsonSmear]

This seems to resolve the TCP Window not updating, but is there a reason i get nothing for the IP ToS regardless of the setting?

Results:
« SpeedGuide.net TCP Analyzer Results »
Tested on: 11.29.2007 11:20
IP address: 72.40.xx.xxx

TCP options string: 020405b40103030201010402
MSS: 1460
MTU: 1500
TCP Window: 256960 (multiple of MSS)
RWIN Scaling: 2
Unscaled RWIN : 64240
Reccomended RWINs: 64240, 128480, 256960, 513920
BDP limit (200ms): 10278kbps (1285KBytes/s)
BDP limit (500ms): 4111kbps (514KBytes/s)
MTU Discovery: ON
TTL: 119
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

http://www.speedtest.net/result/207101482.png (http://www.speedtest.net)

[trogers]

This seems to resolve the TCP Window not updating, but is there a reason i get nothing for the IP ToS regardless of the setting?

IP ToS: 00000000 (0)

http://www.speedtest.net/result/207101482.png (http://www.speedtest.net)

Your ISP's router probably does not accept ToS settings.

[CrimsonSmear]

Should I input an IP ToS value, should the ISP change/upgrade their router?

[trogers]

Should I input an IP ToS value, should the ISP change/upgrade their router?

Some ISPs have networks that do not accept ToS settings and a few may cause connection problems if a value other than zero is used.

The TCP setting in your registry is not behaving normally, since TCP Optimizer and WinSockFix cannot adjust its TCP Window.

I used Cablenut's DefaultReceiveWindow as this field overrides TCP Window for comps running on XP SP2.

I suggest you leave your settings as they are since they have been tweaked and you are getting 7 mbps.

[CrimsonSmear]

Thank you very much for your assistance, as it was greatly appreciated.