Author Topic: Wireless ISP tweak (addendum)  (Read 3315 times)

Offline Duke

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Wireless ISP tweak (addendum)
« on: July 10, 2008, 10:49:01 pm »
**I forgot to add system specs - Win XP Pro SP2 up-to-date and clean
I have a Broadband Wireless ISP advertised 1000 down\768 up. www.partnershipwireless.com

Ran Speedguide - Ten results average 751 down\381 up, latency 200(s).  Installed CableNut and tried a few tweaks, suggested for connections similar to mine, found in the forums.  My post-tweak Speedguide test results degraded to 340 down\370 up, latency still 200(s).  All CableNut tweaks were SpeedGuide-tested, after total system reboots.

~Snipit~
« SpeedGuide.net TCP Analyzer Results »
Tested on: 07.10.2008 23:15
IP address: xx.xxx.xxx.xxx
 
TCP options string: 020405ac0103030301010402
MSS: 1452
MTU: 1492
TCP Window: 511104 (multiple of MSS)
RWIN Scaling: 3
Unscaled RWIN : 63888
Reccomended RWINs: 63888, 127776, 255552, 511104
BDP limit (200ms): 20444kbps (2556KBytes/s)
BDP limit (500ms): 8178kbps (1022KBytes/s)
MTU Discovery: ON
TTL: 49
Timestamps: OFF
SACKs: ON
IP ToS: 01000000 (64)
    Precedence: 010 (immediate)
    Delay: 0 (normal delay)
    Throughput: 0 (normal throughput)
    Reliability: 0 (normal reliability)
    Cost: 0 (normal cost)
    Check bit: 0 (correct)
DiffServ: CS2 010000 (16) - class 2 (RFC 2474). Similar forwarding behavior to the ToS Precedence field.
~End Snipit~
------------------
Any suggestions or glaring errors?
Thanks in advance.
« Last Edit: July 11, 2008, 03:40:28 pm by Duke »

mccoffee

  • Guest
Re: Wireless ISP tweak (addendum)
« Reply #1 on: July 13, 2008, 11:04:48 pm »
http://www.dslnuts.com/files/cmtu10017.zip download this toll unzip run it type 1500 get that mtu up .  If you use a router  make sure the mtu is set for 1500 there too.  Tanke another analyxer after running  the tools and saving changes and the coputer is rebooted.

Offline Duke

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Re: Wireless ISP tweak (addendum)
« Reply #2 on: July 16, 2008, 07:58:32 pm »
Ran the utility.  PC running 1500mtu and bumped router to 1500mtu.

As you can see in my RWIN, I did some more research, then calculated and adjusted the RWIN to match the mutiple of the 1452 MSS, while awaiting a reply. The interim 63888 Def. RWIN adjustment appeared to increase and make my D/L more solid.  However with the Default RWIN setting, I set the Default SendWindow to 35200, which seems to be limiting the receive side. I did not see the U/L gains that I observed with the D/L side.

~New Results Snipit~
« SpeedGuide.net TCP Analyzer Results »
Tested on: 07.16.2008 20:48
IP address: xx.xxx.xxx.xxx
 
TCP options string: 020405b401010402
MSS: 1460
MTU: 1500
TCP Window: 63888 (NOT multiple of MSS)
RWIN Scaling: 0
Unscaled RWIN : 63888
Reccomended RWINs: 64240, 128480, 256960, 513920
BDP limit (200ms): 2556kbps (319KBytes/s)
BDP limit (500ms): 1022kbps (128KBytes/s)
MTU Discovery: OFF
TTL: 49
Timestamps: OFF
SACKs: ON
IP ToS: 01000000 (64)
    Precedence: 010 (immediate)
    Delay: 0 (normal delay)
    Throughput: 0 (normal throughput)
    Reliability: 0 (normal reliability)
    Cost: 0 (normal cost)
    Check bit: 0 (correct)
DiffServ: CS2 010000 (16) - class 2 (RFC 2474). Similar forwarding behavior to the ToS Precedence field.
~End Snipit~

Thank you for the reply mccoffee..
Duke

mccoffee

  • Guest
Re: Wireless ISP tweak (addendum)
« Reply #3 on: July 16, 2008, 08:21:05 pm »
try thease in the cn

DefaultReceiveWindow = 192000
DefaultSendWindow = NaN
DisableAddressSharing = 1
InitialLargeBufferCount = 200
InitialMediumBufferCount = 480
InitialSmallBufferCount = 640
LargeBufferSize = 819200
MaxFastTransmit = 64000
MediumBufferSize = 150400
Priority Boost = 0
SmallBufferSize = 12800
TransmitWorker = 32
FastSendDatagramThreshhold = 4096
EnableFastRouteLookup = 1
EnablePMTUDiscovery = 1
IgnorePushBitsOnReceives = 0
GlobalMaxTcpWindowSize = 37960
MaxFreeTcbs = 8000
MaxHashTableSize = 16384
MaxNormLookupMemory = 5000000
SackOpts = 1
SynAttackProtect = 1
Tcp1323Opts = 0
TcpLogLevel = 1
TcpMaxDupAttacks = 3
TcpMaxHalfOpen = 100
TcpMaxHalfOpenRetired = 80
TcpRecvSegmentSize = 1460
TcpSendSegmentSize = 1460
TcpTimedWaitDelay = 30
TcpUseRFC1122UrgentPointer = 0
TcpWindowSize = 37960
MaxConnectionsPer1_0Server = 10
MaxConnectionsPerServer = 8
DefaultTimeToLive = 64
DefaultUserTOSSetting = 0
TcpMaxDataRetransmissions = 6
DefaultTOSValue = 240

Offline Duke

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Re: Wireless ISP tweak (addendum)
« Reply #4 on: July 17, 2008, 09:27:05 pm »
Run time errors abound, with the suggested settings.  Debug mode went into hyperdrive.  I finally hit the reset button to exit, and received file truncation messages, from the disk scanner-error check.   :o

Thankfully, it did reboot.  :-\

Duke

mccoffee

  • Guest
Re: Wireless ISP tweak (addendum)
« Reply #5 on: July 18, 2008, 06:55:05 am »
If you are getting run time errors  something elese is worng with that sytem never heard of that happening with cn.

Check for spyware ,and viruses 

Offline Duke

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Re: Wireless ISP tweak (addendum)
« Reply #6 on: July 18, 2008, 03:08:33 pm »
I scan with these two online scan engines, once per week, manually:
F-Prot Online Virus/Malware Scanner
Trend Micro Online Virus/Malware Scanner
I run these two scanners as resident:
Grisoft’s AVG Free 7.5 - updated daily
SpyBot SD v1.6.0.30 updated yesterday
~OK I admit- I may be a bit paranoid, using four AV scanners.

I also manually run AdAware 2008-Free, once a week.
It was the SpyBot S&D files that were listed in the truncated files.  Upon reflection, it may have been the S&D detecting the multiple registry changes that CN was making.

Although not completely fool-proof, they all report the system clean.
Duke