User's Manual

Windows Device ConfigurationsChapter —4
50 CV60 Vehicle-Mount Computer User's Manual
DHCP
Dynamic Host Configuration Protocol (DHCP) is enabled by default in
Windows CE. You can configure the registry settings in the following to
set the required AutoIP/DHCP behavior:
S For Ethernet: HKEY_LOCAL_MACHINE\Comm\LAN9001\TcpIp
S Fot 802.11b: HKEY_LOCAL_MACHINE\Comm\NETWLAN1\TcpIp
Other registry keys that can modify the behavior of AutoIP are as follows.
You can find the appropriate settings and behavior of each of these keys in
Microsoft Help.
S AutoInterval
S AutoMask
S AutoSubnet
S AutoIP
S AutoSeed
When a TCP/IP client cannot find a DHCP server, it generates an AutoIP
address from the 169.254.xxx.xxx block. The client then tries to check for
a DHCP server every 300 seconds (5 minutes) and if a DHCP server is
found, the client drops the AutoIP address and uses the address from the
DHCP server.
,See Automatic Client Configuration" for more information on AutoIP.In
the MSDN Windows CE documentation available on the Microsoft DeĆ
veloper Network web site (http://www.msdn.com).
To disable AutoIP, set the AutoCfg registry entry to 0." If a DHCP server
cannot be found, instead of using AutoIP, the system will display the UnĆ
able to obtain a server assigned IP address" message.
Note: If AutoIP is defined using CAB files, the EnableDHCP registry key
must also be defined and set to 1" before the system will attempt to obĆ
tain a DHCP address.
Note: To extend the number of attempts that a DHCP client makes to get
a DHCP address, use the DhcpRetryDialogue and DhcpMaxRetry registry
settings.
Note: Change the AutoInterval registry key value to make the client retry
more often to obtain a DHCP address.