HELP: Verizon Tweaking

[teqguy]

Can anyone help get the last bit of juice out of this?

WinXP Pro/Enterprise Server Edition
Linksys NIC 10/100
SMC Switch/Router

TCP properties for IP = (lsanca2-ar27-x-x-xxx-xxx.lsanca2.dsl-verizon.net)
Browser/OS = Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; .NET CLR 1.0.3705)

TCP options string = 020405b40103030101010402

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1460, which equals MSS.

Default Receive Window (RWIN) = 73000
RWIN Scaling (RFC1323) = 1 bits
Unscaled Receive Window = 36500
RWIN is 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)

bandwidth * delay product:
Your RcvWindow limits you to: 2920 kbps (365 KBytes/s) @ 200ms
Your RcvWindow limits you to: 1168 kbps (146 KBytes/s) @ 500ms

MTU Discovery (RFC1191) = ON

Time to live left = 56 hops
TTL value is ok.

Timestamps (RFC1323) = OFF

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000
-------------------------------------------------------------------------------

Oh, and a tip to all Verizon users:
Your IP is only static for 3 weeks, then they re-route everything. Almost everytime they swap out IPs, I notice performance degredation. To verify this, I called the support and they said that in some cases, your bandwidth will degrade if they accidently put you on the 768/128 DNS instead of the 1.5/128. From what i know, they have two main DNS servers that route out and are capped, instead of capping blocks or per-user cap: lsanca2(1.5/128) and lsanca1(768/128). For business, its lsanca3 lsanca4 and lsanca5............................................if theres any way to route out to lsanca5............you'd be looking @ 1.5/1.5 for $60/month...................hmm, ideas ideas;)

[mnosteele52]

Download Cablenut from my signature and try the following settings:

DefaultReceiveWindow = 192512
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 = 37960 or 52560 or 64240
MaxFreeTcbs = 8000
MaxHashTableSize = 16384
MaxNormLookupMemory = 5000000
SackOpts = 1
SynAttackProtect = 1
Tcp1323Opts = 0
TcpLogLevel = 1
TcpMaxDupAcks = 2
TcpMaxHalfOpen = 100
TcpMaxHalfRetried = 80
TcpRecvSegmentSize = 1460
TcpSendSegmentSize = 1460
TcpTimedWaitDelay = 30
TcpUseRFC1122UrgentPointer = 0
TcpWindowSize = 37960 or 52560 or 64240
MaxConnectionsPer1_0Server = 20
MaxConnectionsPerServer = 10
DefaultTTL = 64
DisableUserTOSSetting = 0
TcpMaxDataRetransmissions = 6
DefaultTOSValue = 92


Also add the following line to your registry:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\AFD\Parameters

BufferMultiplier - DWORD - hexidecimal value of 400.

:) ;)

[teqguy]

My Rwin of 73000 is still better...............think i should try adding instead of using multipliers?(74060?)

[mnosteele52]

Try all the settings except set your GlobalMaxTcpWindowSize & TcpWindowSize to 73000 (it's an even multiple of 1460) and set Tcp1323Opts to 1.:) :D

[teqguy]

I tried the settings, no improvement, and i was just thinking that maybe using something other than an even multiplier will help me squeeze one or two more packets in