ETAS Troubleshooting Problems
ES592.1 - User Guide 36
To enable the APIPA mechanism:
1. Open the Registry Editor:
i. Windows XP:
Click Start and then click Run. Enter regedit and click OK.
ii. Windows Vista:
Click Start, enter regedit in the entry field, and push
<
ENTER>.
The registry editor is displayed.
2. Open the folder HKEY_LOCAL_MACHINE\SYSTEM\
CurrentControlSet\Services\
Tcpic\Parameters\
3. Click Edit Find to search for the key
IPAutoconfigurationEnabled.
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.
4. 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 reg-
istry 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 corresponding network adapter.
5. Close the registry editor.
6. Restart your workstation in order to make your changes take
effect.
7.3.2 Search for Ethernet Hardware fails
Cause: Personal Firewall blocks Communication
For a detailed description on problems caused by personal firewalls and possi-
ble solutions see “Personal Firewall blocks Communication” on page 38.
Cause: Client Software for Remote Access blocks Communica-
tion
PCs or notebooks which are used outside the ETAS hardware network some-
times use a client software for remote access which might block communica-
tion to the ETAS hardware. This can have the following causes:
• A firewall which is blocking Ethernet messages is being used (see
„Cause: Personal Firewall blocks Communication“ on page36)
• By mistake, the VPN client software used for tunneling filters messages.
As an example, Cisco VPN clients with versions before V4.0.x in some
cases erroneously filtered certain UDP broadcasts.
If this might be the case, please update the software of your VPN client.
To Next Page
