TCP/IP Configuration Parameters

The Windows CE TCP/IP protocol suite obtains all of its configuration data from the registry. Most of this information is written to the registry by the Setup program.

Some of this information is also supplied by the Dynamic Host Configuration Protocol (DHCP) client service if it is enabled. This section defines all of the registry parameters used to configure the protocol driver, Tcpip.sys, which implements the standard TCP/IP network protocols.

This implementation of the Windows CE protocol suite should perform properly and efficiently in most environments using only the configuration information gathered by Setup and DHCP. Optimal default values for all other configurable aspects of the protocols for most cases have been encoded into the drivers. Some customer installations may require changes to certain default values. To handle these cases, optional registry parameters can be created to modify the default behavior of some parts of the protocol drivers.

Note   The Windows CE TCP/IP implementation is largely self-tuning. Adjusting registry parameters may adversely affect system performance.

All of the TCP/IP parameters are registry values located under the HKEY_LOCAL_MACHINE\Comm\Tcpip\Parms registry key.

Adapter-specific values are listed under subkeys for each adapter. Depending on whether or not the system or adapter is DHCP-configured, and on whether or not static override values have been specified, there may be parameters that have both DHCP and statically configured values. Either removing and reinserting the network card, or calling the appropriate IP Helper functions, is generally required for a change in any of these parameters to take effect.

 Last updated on Friday, April 02, 2004

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