In the AD Campus solution, for S5560X or S6520X switches, the switch-mode should be set to VXLAN MODE before it is managed by SeerEngine-Campus as a leaf device, it will take effect after restart. Otherwise it will fail to go online.
Step 1: Check the optional mode for switch.
Step 2: Input the "switch-mode 1" to change the switch-mode into VXLAN MODE, then reboot the device.
Step 3: Check the switch-mode of switch.