Indicates the queue scheduling mode. The system currently supports only PQ scheduling (enumerated value: strictPriority(1)). In the case of PQ scheduling, PQ takes out all packets from a queue with a high priority and transmits them. After such a transmission is completed, PQ performs the same on all packets in a queue with an intermediate priority, a queue with a normal priority, and a queue with a low priority one by one. In this way, packets in a queue with the highest priority precede packets in a queue with a less higher priority and therefore are processed preferentially, even in case of congestion. This ensures that packets for key services are processed first. Options: 1. strictPriority(1) -indicates the strict priority queue scheduling mode 2. wrr(2) -indicates the weighted round robin mode