Reasons why users cannot obtain IP addresses after DHCP Snooping is configured on S series switch

After DHCP snooping is enabled, all interfaces on S series switches are untrusted by default. DHCP Discover packets, however, must be forwarded from a trusted interface on the switch. Therefore, you must configure the interface connected to the DHCP server as a trusted interface to ensure that users connected to the switch can obtain IP addresses.

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