
Chapter 5 — Network Support
CK60 Mobile Computer with Windows CE User’s Manual 85
To read the current enabled operating bands
• Call DeviceIoControl using
IOCTL_NDISUIO_QUERY_OID_VALUE with the
OID_GET_BAND parameter. This returns the enabled bands masked
by what the CK60 supports.
Note: If “Registry Restore” is enabled, you must flush the registry before
cold-booting or the change will be lost.
Configuring Ethernet Communications
You can use the CK60 directly in an Ethernet network if you have ordered
the Ethernet option on your CK60 and you insert it into a dock. The
communications dock as an Ethernet connector makes it possible for the
CK60 to communicate with your Ethernet network.
To use the CK60 in an Ethernet network
1 Configure the Network Name (SSID), Host IP Address, IP Settings (if
not using DHCP), and Network Port parameters on each CK60.
2 If required for your network, set the Primary and Secondary DNS Server
and Primary and Secondary WINS Server parameters on each CK60.
AutoIP/DHCP
Automatic Private IP Addressing (AutoIP) is enabled by default in
Windows CE. To remain compatible with other versions of Windows CE,
enable this setting. You can configure the registry settings in the following
to set the required AutoIP/DHCP behavior:
HKEY_LOCAL_MACHINE\Comm\PRISMNDS1\TcpIp
Other registry keys that modify the behavior of AutoIP are as follows. You
can find the appropriate settings and behavior of each of the AutoInterval,
AutoIP, AutoMask, AutoSeed, and AutoSubnet keys in Microsoft Help.
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 15 seconds and if a DHCP server is found, the client
drops the AutoIP address and uses the address from the DHCP server.
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
“Unable to obtain a server assigned IP address” message.
Note: If you try to disable AutoIP using a CAB file to set the registry value
for AutoIP, set the EnableDHCP value to “1” to keep DHCP enabled.
Note: Use DhcpRetryDialogue and DhcpMaxRetry registry settings to
extend attempts that a DHCP client makes to get a DHCP address.
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