Can someone explain this.

steelsolid · Post by **steelsolid** » Mon Feb 24, 2003 8:49 pm

What would this do to improve speed?

Default Receive Window (RWIN) = 32767
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 32767
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)

and how can I improve this:

bandwidth * delay product:
Your RcvWindow limits you to: 1310.68 kbps (163.835 KBytes/s) @ 200ms
Your RcvWindow limits you to: 524.272 kbps (65.534 KBytes/s) @ 500ms

mnosteele52 · Post by **mnosteele52** » Mon Feb 24, 2003 9:03 pm

Your RWIN needs to be an even multiple of your MSS for optimum throughput and that is just telling you what your RWIN limits you to at different latencies. If you would like help optimizing your connection please read the Help & Tips link in my signature.

steelsolid · Post by **steelsolid** » Mon Feb 24, 2003 9:27 pm

Ok

1. Cable
2. dunno (comcast.net)
3. Everything looks good on the test except what I posted above.
4. Speeds range from 1000-1400 kb/sec.

My last test was:

"764 / 121" - Speakeasy (Atlanta)
"1158 / 124" - Speakeasy (Boston)

Running XP.

What would changing the RWIN do? Since it is low (32767), should I change it to 64240 (MSS x 44)? Or just try them all.

mnosteele52 · Post by **mnosteele52** » Mon Feb 24, 2003 9:39 pm

My suggestion is use Cablenut and the following settings:

DefaultReceiveWindow = 230400
DefaultSendWindow = 16384
DisableAddressSharing = 1
InitialLargeBufferCount = 100
InitialMediumBufferCount = 240
InitialSmallBufferCount = 320
LargeBufferSize = 81920
MaxFastTransmit = 64000
MediumBufferSize = 15040
PriorityBoost = 0
SmallBufferSize = 1280
TransmitWorker = 32
FastSendDatagramThreshold = 4096
EnableFastRouteLookup = 1
EnablePMTUDiscovery = 1
IgnorePushBitsOnReceive = 0
GlobalMaxTcpWindowSize = 64240
MaxFreeTcbs = 8000
MaxHashTableSize = 16384
MaxNormLookupMemory = 5000000
SackOpts = 1
SynAttackProtect = 1
Tcp1323Opts = 0
TcpLogLevel = 1
TcpMaxDupAcks = 3
TcpMaxHalfOpen = 100
TcpMaxHalfRetried = 80
TcpRecvSegmentSize = 1460
TcpSendSegmentSize = 1460
TcpTimedWaitDelay = 30
TcpUseRFC1122UrgentPointer = 0
TcpWindowSize = 64240
MaxConnectionsPer1_0Server = 20
MaxConnectionsPerServer = 10
DefaultTTL = 64
DisableUserTOSSetting = 0
TcpMaxDataRetransmissions = 6
DefaultTOSValue = 92

VERY IMPORTANT TO DO THE FOLLOWING

1. Under your LAN connection - properties - general tab, uninstall all the protocols there that you do not need.

2. Open IE and select tools - internet options - connections - LAN settings, make sure NOTHING there is checked.

3. Make sure you have the latest drivers for your NIC from the manufacturer. Set your NIC duplex mode to 10mb half duplex for Cable, for DSL it is ISP dependent unless you are using a router, if so then set it to 100mb full duplex for both Cable & DSL (the instructions are in my Help & Tips link). If you are using a router make sure you have the latest firmware.

4. Clear your temporary internet files.

5. Power cycle your modem, unplug it for atleast 15 seconds.

6. Download and update then do a scan with SpyBot & Ad Aware 6.0 to remove any spyware then install and SpywareBlaster to stay spyware FREE.

7. Make sure you do the faster web page tweak in my Help & Tips link.

steelsolid · Post by **steelsolid** » Mon Feb 24, 2003 9:47 pm

You da bomb!

2003-02-24 21:46:01 EST: 1368 / 125
Your download speed : 1368738 bps, or 1368 kbps.
A 167 KB/sec transfer rate.
Your upload speed : 125608 bps, or 125 kbps.
Seems like broadband .. above the 1mbit barrier!

mnosteele52 · Post by **mnosteele52** » Mon Feb 24, 2003 9:48 pm

Glad to help.

steelsolid · Post by **steelsolid** » Mon Feb 24, 2003 9:49 pm

Ok.. after reading... do I need "Microsoft Network Client" for my Cable modem? IF not, I'll uninstall it.

mnosteele52 · Post by **mnosteele52** » Mon Feb 24, 2003 9:53 pm

If you are a stand alone pc then all you should need is TCP/IP Internet Protocol, if for some reason you ever do need it you can always reinstall it.