Issue
MSTP capture shows no destination network in the I-Am packet from the third party device.
Environment
- BACnet
- Third party device
- Zone IO 583
- I-am
- Who-is
- MSTP
- Wireshark
Cause
The third party device may still respond to the Who-Is broadcast from Cyberstation, but is programmed to exclude the Destination Network in its I-Am response when the Network ID (UDP) is set to a value of 1.
Resolution
Use a Network ID that is an integer other than 1, or have the third party vendor correct the configuration issue.