This object selects the overall queue-scheduling algorithm used on a port, strict priority, weighted fair queuing, or weighted round robin, which determines how the per-queue weights configured elsewhere actually get applied. An admin picks strict priority for latency-critical traffic that must always be served immediately, or one of the weighted modes to more fairly share bandwidth across multiple traffic classes. For example, setting zyQueuingMethodPortMode to weightedRoundRobin(2) on a port would apply that port's configured queue weights using a round-robin scheduling algorithm rather than strict priority.