W2K registry Tweaks to increase cable modem and dsl speed


To boost network performance, add the following values to the Parameters Key:

Hive: HKEY_LOCAL_MACHINE

Key: SYSTEM\CurrentControlSet\Services\Tcpip\Parameters


Name: DefaultTTL
Type:
REG_DWORD
Value: 128 default=32
default time to live (TTL) for
TCP/IP packets

Name: EnablePMTUBHDetect

Type: REG_DWORD

Value: 0
default=0
whether the stack will attempt to detect Maximum
Transmission Unit routers that do not send back ICMP fragmentation-needed
messages.

Name: EnablePMTUDiscovery

Type: REG_DWORD

Value: 1
default=1
Specifies whether the TCP/IP stack will attempt to
perform path MTU discovery as specified in RFC 1191.

Name: SackOpts
Type: REG_DWORD
Value: 1
default=0
Enables support for selective acknowledgements as
documented by Request for Comment (RFC) 2018.

Name: Tcp1323Opts
Type:
REG_DWORD
Value: 3 default=0
RFC 1323 time stamps and window scaling
options. Legal values are: “0” = disable RFC 1323 options, “1” = window scale
enabled only, “2” = time stamps enabled only and “3” = both options enabled.

Name: TcpWindowSize
Type:
REG_DWORD
Value: 5ae4c default=0
Specifies the receive window size
advertised by the TCP/IP stack.

Name: GlobalMaxTcpWindowSize

Type: REG_DWORD

Value: 5ae4c
default=0
Specifies the system maximum receive window size
advertised by the TCP/IP stack.

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