Author Topic: Settings for DSL connection (behind router) 8 down 1up  (Read 1729 times)

Offline umaneko

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Settings for DSL connection (behind router) 8 down 1up
« on: September 27, 2008, 10:44:44 pm »
TCP options string = 020405ac0103030401010402
 
MTU = 1492
 
MSS = 1452
 
Default TCP Receive Window (RWIN) = 921600
RWIN Scaling (RFC1323) = 4 bits (scale factor: 2^4=16)
Unscaled TCP Receive Window = 57600

For optimum performance, consider changing RWIN to a multiple of MSS.
Other RWIN values that might work well with your current MTU/MSS:
63888  (up to 2 Mbit lines, depending on latency. MSS * 44)
127776 (1-5 Mbit lines, depending on latency. MSS * 44 * 2)
255552 (2-14 Mbit lines, depending on latency. MSS * 44 * 2^2)
511104 (8-30 Mbit lines, depending on latency. MSS * 44 * 2^3)
1022208 (25-60 Mbit lines depending on latency. MSS * 44 * 2^4)
 
bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 36864 kbps (4608 KBytes/s) @ 200ms
Your TCP Window limits you to: 14746 kbps (1843 KBytes/s) @ 500ms
 
MTU Discovery (RFC1191) = ON
 
Time to live left = 47 hops
TTL value is ok.
 
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
 
IP type of service field (RFC1349) = 00000000 (0)
 

mccoffee

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Re: Settings for DSL connection (behind router) 8 down 1up
« Reply #1 on: September 29, 2008, 05:07:37 am »
DefaultReceiveWindow = 921600
DefaultSendWindow = 128000
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 = 200376
MaxFreeTcbs = 8000
MaxHashTableSize = 16384
MaxNormLookupMemory = 5000000
SackOpts = 1
SynAttackProtect = 1
Tcp1323Opts = 1
TcpLogLevel = 1
TcpMaxDupAttacks = 3
TcpMaxHalfOpen = 100
TcpMaxHalfOpenRetired = 80
TcpRecvSegmentSize = 1452
TcpSendSegmentSize = 1452
TcpTimedWaitDelay = 30
TcpUseRFC1122UrgentPointer = 0
TcpWindowSize = 200376
MaxConnectionsPer1_0Server = 20
MaxConnectionsPerServer = 10
DefaultTimeToLive = 64
DefaultUserTOSSetting = 0
TcpMaxDataRetransmissions = 6
DefaultTOSValue = 240