PLANET XGS3-24040 - Manual (Page 239)

Chapter 31 DHCP Snooping Configuration
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31.4.2 DHCP Snooping Troubleshooting Help
If there is any problem happens when using DHCP Snooping function, please check if the problem is caused
by the following reasons:
 Check that whether the global DHCP Snooping is enabled;
 If the port does not react to invalid DHCP Server packets, please check that whether the port is set as a
non-trusted port of DHCP Snooping.