DHCP Port Snooping

For zero touch onboarding, if a port answers Dynamic Host Configuration Protocol (DHCP) requests sent by the switch and the port is in the Auto-sense UNI state, the system automatically changes the port's Private VLAN configuration from isolated mode to promiscuous mode.

Without this port type change on the Private VLAN, the other devices in the network cannot receive an IP address through the DHCP server if they are in the Zero Touch Fabric Configuration mode unless you disable Auto-sense on the port and manually change the port from isolated mode to promiscuous mode.