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.