RWIN troubles [Archive] - SpeedGuide.net Broadband Community

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billxo
03-24-08, 02:47 PM
Hi,Im having trouble getting my RWIN setting changed if I use the TCP/OPTIMIZER and set it to 1045440 which i was instructed to do by the FIOS tech.It still says see below on your analyzer...

TCP options string = 020405b40402080a000d5d6c0000000001030300
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 TCP Receive Window (RWIN) = 5840
RWIN Scaling (RFC1323) = 0 bits
Unscaled TCP Receive Window = 5840

RWIN seems to be set to a very small number. If you're on a broadband connection, consider using a larger value.
RWIN is a multiple of MSS
Other RWIN values 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

But when i go to regedit it says 1045440 any ideas ?

Thanks !

Rollingstone
03-24-08, 05:56 PM
Default TCP Receive Window (RWIN) = 5840

Is your browser set to have proxy connection ? (are you using Toonel ?)

billxo
03-24-08, 06:09 PM
No and No have FIOS 20 / 5 cant seem to tweek it to get close to what my through put should be ive tried to use the optimizer from this site and used dr tcp also they both say im set at the recomended 1045440 per fios tech. instruction but when i check it on the analyzer on this site comes back at RWIN -5840 thats pretty much it in a nut shell dont know whats going on

Rollingstone
03-24-08, 07:47 PM
Maximum useful data in each packet = 1448, which is less than MSS because of Timestamps, or other TCP/IP options used.

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 - 513920
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Windows Scaling - check
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 - 80
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768
Then select "Apply Changes" and reboot to take effect

After reboot, post new TCP Analyzer