S series switches how to locate the downlink AP can not get the IP address

For S series switches (except S1700):
In an networking such as AC-S5700-AP, the AC assigns an IP address to the AP through the DHCP method. If the AP does not obtain an IP address, the checks on the switch are as follows:
- Run the display arp command to check whether the MAC address of the connected AC and AP is learned on the switch.
- Run the display dhcp snooping configuration command to check whether DHCP snooping is configured on the switch and the DHCP packets received by the switch connected to the AC and AP are filtered out.
If there is no problem with the checks made above, check the configuration on the AC and AP.

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