What should be checked to ensure PTP traffic can traverse the network correctly?

To ensure that Precision Time Protocol (PTP) traffic can traverse the network correctly, it's crucial to focus on the specific multicast addresses and ports that PTP uses for synchronization purposes. The correct approach is to check UDP ports 319 and 320 on the multicast address 224.0.0.129.

PTP operates primarily using multicast communication to distribute timing information across a network. UDP port 319 is used for the synchronization message, while UDP port 320 is responsible for various management messages. The designated multicast address, 224.0.0.129, is specifically assigned for PTP communication, allowing devices on the network to receive synchronization messages effectively.

Ensuring that these ports and the correct multicast address are accessible without restrictions permits the synchronization messages to flow unimpeded, thereby enabling accurate timing across devices connected to the Dante network. This is essential in maintaining the integrity and performance of audio-over-IP systems that rely on precise timing for audio synchronization.