What initial step should be taken if multiple devices are reported as clock master in a Dante system?

In a Dante system, if multiple devices are reported as clock masters, the very first step to address this situation involves checking the switch configurations for Access Control Lists (ACL) evidence. This is essential because improper switch configurations can lead to network issues, including the possibility of multiple devices being assigned as clock masters.

When devices are set to perform as clock masters on a Dante network, it can cause synchronization issues and audio dropouts. In a properly functioning Dante system, there should only be one clock master at any given time, which is responsible for maintaining time synchronization across the network. By verifying the switch configurations for ACL settings, you can identify if there are any conflicts or misconfigurations that may lead to this situation. It's crucial to resolve any underlying network configurations to restore proper clock management in the system.

The other choices, such as changing device names or rebooting devices, do not address the root cause of the problem related to network configuration. Likewise, simply increasing network bandwidth would not resolve the issue of clock mastery since it is not related to bandwidth limitations. Therefore, checking the switch configurations for ACL evidence is the most logical and appropriate initial step to take when dealing with multiple clock masters in a Dante system.