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# How do I use dual Ethernet?

You might use both Ethernet ports of the reader for various reasons, such as:

- Separating out PLC communications for enhanced security. This requires two separate IP addresses, one for image or data saving (Multi-Reader Sync, FTP, PTP), and the other for real-time PLC communication.
- Load balancing by using both Ethernet0 and Ethernet1 ports in separated networks. Use Ethernet0 for real-time critical communications (PTP, industrial protocols, Multi-Reader Sync), and use Ethernet2 for FTP upload.
- Separating image FTP traffic from low-latency tunnel management traffic.

To use dual Ethernet:

1. Enable the second Ethernet port with the Enable Ethernet 1 checkbox.

2. Configure the IP addresses of the ports.

   You can apply the Use Static IP Address option to one or both ports, but only one port can Use DHCP Server.

3. Select which Ethernet port runs PLC communications with the FFP Port dropdown on the Ethernet 0 tab.

Note that on the reader, the physical ports are marked as ENET0 and ENET1.

Note: DM380,DM580