Settings for XP

Andrew · Post by **Andrew** » Tue Sep 17, 2002 11:14 pm

Hi, Just upgraded Win98 SE to XP. i had my settings tweaked in 98. But now i need some Xp settings i guess

Everything is Default at the moment. 500mhz 192mb ram Cable

TCP options string = 020405b401010402010303000101080a143dbf5f00000000

MTU = 1500
MTU is fully optimized for broadband.

MSS = 1460
Maximum useful data in each packet = 1448, which is less than MSS because of Timestamps, or other TCP/IP options used.

Default Receive Window (RWIN) = 17520
RWIN Scaling (RFC1323) = 0 bits
Unscaled Receive Window = 17520
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: 700.8 kbps (87.6 KBytes/s) @ 200ms
Your RcvWindow limits you to: 280.32 kbps (35.04 KBytes/s) @ 500ms
Consider increasing your RWIN value to optimize TCP/IP for broadband.

MTU Discovery (RFC1191) = ON

Time to live left = 53 hops
TTL value is ok.

Timestamps (RFC1323) = ON
Note: Timestamps add 12 bytes to the TCP header of each packet, reducing the space available for useful data.

Selective Acknowledgements (RFC2018) = ON

IP type of service field (RFC1349)= 00000000

mnosteele52 · Post by **mnosteele52** » Tue Sep 17, 2002 11:20 pm

What are your caps Andrew? Also you should really upgrade your RAM to 384mb+, XP is a resource hog and the more RAM the better.

Andrew · Post by **Andrew** » Tue Sep 17, 2002 11:27 pm

Caps posted on my ISP's website say 1.5mbps/192kbps and thanks for the input on the Ram. Ill grab another stick of 256

Sorry for the delay, Speedguide is running slow for me right now. pages is taking a few moments to load. anyone having the same problems ?

mnosteele52 · Post by **mnosteele52** » Tue Sep 17, 2002 11:31 pm

Try the following in Cablenut:

DefaultReceiveWindow = 192512
DefaultSendWindow = 24576
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.

Hope it helps, what kind of speeds are you getting with defaults?

Andrew · Post by **Andrew** » Tue Sep 17, 2002 11:35 pm

The default speeds aint bad. I just took a speed test from ftp://ftp1.optonline.net/pub/test64

Speeds are a bit low from my win98 settings.

Andrew · Post by **Andrew** » Tue Sep 17, 2002 11:58 pm

Just tried the tweak settings. Speeds are slow now. like 50 kb/sec. the speeds were slow from the start. started when i installed xp.

jeff8874 · Post by **jeff8874** » Wed Sep 18, 2002 4:45 am

Other than what settings I am currently using, I found XP defaults to be pretty fast too. There is a reason for this. XP will automatically adjust according to your line, versus 95, 98, ME, and before never had that feature. I run 2 XP machines, I leave one stock, and cant really say there is that much of a difference with my tweaked machine.

just my 2 cents...