What is the correct command to observe the Sync traffic in a VRRP environment?

The command to observe the synchronization traffic in a Virtual Router Redundancy Protocol (VRRP) environment focuses on monitoring multicast traffic directed to the specific VRRP address, which is 224.0.0.18. Using the command "fw monitor -e 'accept dst=224.0.0.18;'" specifically filters and captures packets that are destined for that multicast address.

In VRRP, routers use this multicast address for communication between the master router and backup routers. Therefore, capturing traffic to this address directly allows you to observe the VRRP synchronization messages exchanged among the devices. This monitoring is essential for troubleshooting and ensuring the proper functioning of the VRRP configuration.

The other options do not serve the same purpose or are incorrect in the context of capturing VRRP traffic. For instance, while some options may reference multicast or specific protocols, they do not accurately filter for the traffic associated with the VRRP's designated multicast address, which is crucial for observing the synchronization process.