ES910.3-A - User’s Guide 67
ETAS Troubleshooting Problems
6.2 Problems and Solutions
6.2.1 Network Adapter cannot be selected via Network Manager
Cause: APIPA is disabled
The alternative mechanism for IP addressing (APIPA) is usually enabled on all
Windows XP and Vista systems. Network security policies, however, may request
the APIPA mechanism to be disabled. In this case, you cannot use a network
adapter which is configured for DHCP to access ETAS hardware. The ETAS Net-
work Manager displays a warning message.
The APIPA mechanism can be enabled by editing the Windows registry. This is
permitted only to users who have administrator privileges. It should be done only
in coordination with your network administrator.
To enable the APIPA mechanism:
• Open the Registry Editor:
–Windows XP:
Click Start and then click Run. Enter regedit
and click OK.
–Windows Vista:
Click Start, enter regedit in the entry field,
and push <E
NTER>.
The registry editor is displayed.
• Open the folder HKEY_LOCAL_MACHINE\SYS-
TEM\
CurrentControlSet\Services\
Tcpic\Parameters\
• Click Edit Find to search for the key IPAuto-
configurationEnabled.
If you cannot find any instances of the registry key mentioned, the APIPA mech-
anism has not been disabled on your system, i.e. there is no need to enable it.
Otherwise proceed with the following steps.
• Set the value of the key
IPAutoconfigurationEnabled to 1 to enable
the APIPA mechanism.
You may find several instances of this key in the
Windows registry which either apply to the TCP/IP
service in general or to a specific network adapter.
You only need to change the value for the corre-
sponding network adapter.
• Close the registry editor.
• Restart your workstation in order to make your
changes take effect.
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