ETAS ES415.1 - Search for Ethernet Hardware Fails

ES415.1 - User’s Guide 65
ETAS
6.3.2 Search for Ethernet Hardware Fails
Cause: Personal Firewall blocks Communication
For a detailed description on problems caused by personal firewalls and possible
solutions see chapter 6.3.3 on page 67.
Cause: Client Software for Remote Access blocks Communication
PCs or notebooks which are used outside the ETAS hardware network sometimes
use a client software for remote access which might block communication 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 page65)
• 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.
Cause: ETAS Hardware hangs
Occasionally the ETAS hardware might hang. In this case switch the hardware
off, then switch it on again to re-initialize it.
Cause: Network Adapter temporarily has no IP Address
Whenever you switch from a DHCP company LAN to the ETAS hardware net-
work, it takes at least 60 seconds until ETAS hardware can be found. This is
caused by the operating system’s switching from the DHCP protocol to APIPA,
which is being used by the ETAS hardware.
Cause: ETAS Hardware had been connected to another Logical Network
If you use more than one PC or notebook for accessing the same ETAS hardware,
the network adapters used must be configured to use the same logical network.
If this is not possible, it is necessary to switch the ETAS hardware off and on again
between different sessions (repowering).
Cause: Device driver for network card not in operation
It is possible that the device driver of a network card is not running. In this case
you will have to deactivate and then reactivate the network card.
Deactivating and reactivating the network card:
1. Open the Control Panel:
– Windows 7, 10:
1.1 Click on the Windows symbol.
1.2 Click on Control Panel.
– Windows 8.1:
1.1 Click on the Windows symbol.
1.2 Enter Control Panel in the entry field.
1.3 Push <E
NTER>.
2. Click on Network and Sharing Center.
3. Click on Change adapter settings.