What can I do if the AP connected to an S series switches cannot obtain an IP address

For S series switches (except the S1700):
For example, in a network composed of the AC, S5700, and AP, the AC assigns an IP address to the AP using DHCP. If the AP does not obtain any IP address, troubleshoot this fault on the switch as follows:
- Run the display arp command to check whether the switch has learned the MAC addresses of the connected AC and AP.
- Run the display dhcp snooping configuration command to check whether DHCP snooping is configured on the switch. If so, DHCP packets received on the interfaces between the switch and the AC or AP are filtered.
If no error is found, check the configurations on the AC and AP.

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