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Trusted Interface
Packets from untrusted ports/LAGs are checked against the DHCP Snooping Binding Database.
By default, interfaces are untrusted.
To designate an interface as untrusted go to Interface Settings.
DHCP Snooping Binding Database
Note the following points about maintenance of the DHCP Snooping Binding database:
The device does not update the DHCP Snooping Binding database when a station moves to
another interface.
If a port is down, the entries for that port are not deleted.