The FieldDAQ device is associated with two MAC addresses—both of which are labeled on the device—device and switch. These MAC addresses are not associated with a particular Ethernet port, but both addresses can appear on both ports as necessary.
| Device MAC Address | Switch MAC Address |
|---|---|
| Associated with the device's IP address | Associated with the internal Ethernet switch—not associated with the device’s IP address |
| Used by normal device traffic | Used for Ethernet protocols for network configuration and synchronization |
| Listed in MAX | Not listed in MAX |
The switch MAC address is used to implement the following switch protocols:
The switch MAC address only appears in packets exchanged between the switch embedded in the FieldDAQ device and the next Ethernet device. It will not propagate further in a properly configured network.