Swap antennas is to align the main lobes of the antennas at both ends to each other, and the signal strength of the opposite antenna is the largest.

Suppose there are subnets A1, A2, and A3 under subnet A.
When configuring monitoring settings, if subnets A1, A2, and A3 are not all selected for monitoring, subnet A will not be monitored.
If a new subnet A4 is added under subnet A, the newly added subnet A4 will be monitored only when subnet A is monitored, and the monitoring strategy can be different from the monitoring strategy of subnet A.

When deploying QoS, where the complex classification of data flows is usually deployed in the network