Author Topic: Sympatico 5000/800 And A Question.  (Read 792 times)

Offline EchoTech

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Sympatico 5000/800 And A Question.
« on: December 07, 2005, 05:34:02 am »
  Thanks for a great program!  I have been using Cablenut for a while and have recently had my connection speed upgraded.
It must be time for a tune-up (TCP/IP analyzer results below).

  I also have a question about browser connection settings.  I use Mozilla 1.7.12 and the following preferences are available
(taken from http://preferential.mozdev.org/preferences.html) and I imagine they have some relationship to the Cablenut MaxConnections....  settings. Unfortunately the page doesn't give any default values. Any ideas or suggestions?
 
network.http.max-connections
  Maximum simultaneous HTTP connections

network.http.max-connections-per-server
  Maximum connections to a single server

network.http.max-persistent-connections-per-proxy
  Maximum persistent connections per proxy

network.http.max-persistent-connections-per-server
  Maximum persistent connections per server (normally only relevant for large file downloads)

network.http.pipelining.firstrequest
  Always pipeline the first (SYN) request? (If servers do not support pipelining, this may break sites)

network.http.pipelining.maxrequests
  Maximum number of pipelining requests

TCP/IP Analyzer Results

Running Win2k - Router (D-Link DI-604) - Alcatel Speedtouch DSl Modem
Sympatico HSE Ultra 5000k/800k PPoE DSL

Present speed using Speakeasy Chicago  527.2 down, 81.3 up (6 run average, early AM local & Chicago time)

TCP properties for IP = xxx.xxx.xxx.xxx
Browser/OS = Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.12) Gecko/20050915
Notes: Read the Analyzer FAQ if the above is not your IP address.
TCP options string = 020405ac0103030001010402
MTU = 1492
MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.
MSS = 1452
MSS is optimized for PPPoE DSL broadband. If not, consider raising MTU to 1500 for maximum throughput.
Default Receive Window (RWIN) = 31944
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 31944

RWIN is a multiple of MSS
Other values for RWIN that might work well with your current MTU/MSS:
511104 (MSS x 44 * scale factor of 8)
255552 (MSS x 44 * scale factor of 4)
127776 (MSS x 44 * scale factor of 2)
 63888 (MSS x 44)
bandwidth * delay product (Note this is not a speed test):

Your RcvWindow limits you to: 1277.76 kbps (159.72 KBytes/s) @ 200ms
Your RcvWindow limits you to: 511.104 kbps (63.888 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 54 hops

TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00000000 (0)

  Thanks...

Offline EchoTech

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Re: Sympatico 5000/800 And A Question.
« Reply #1 on: December 11, 2005, 05:32:34 am »
 Bump ?

mccoffee

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Re: Sympatico 5000/800 And A Question.
« Reply #2 on: December 11, 2005, 12:49:53 pm »
DefaultReceiveWindow = 640000
DefaultSendWindow = 102400
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 = 63888
MaxFreeTcbs = 8000
MaxHashTableSize = 16384
MaxNormLookupMemory = 5000000
SackOpts = 1
SynAttackProtect = 1
Tcp1323Opts = 0
TcpLogLevel = 1
TcpMaxDupAttacks = 3
TcpMaxHalfOpen = 100
TcpMaxHalfOpenRetired = 80
TcpRecvSegmentSize = 1452
TcpSendSegmentSize = 1452
TcpTimedWaitDelay = 30
TcpUseRFC1122UrgentPointer = 0
TcpWindowSize = 63888
MaxConnectionsPer1_0Server = 20
MaxConnectionsPerServer = 10
DefaultTimeToLive = 64
DefaultUserTOSSetting = 0
TcpMaxDataRetransmissions = 6
DefaultTOSValue = 240