Interface Trust Configuration

After DHCP snooping is enabled, set the interface connected to the authorized DHCP server as trusted interface.

Context

On a network with DHCP snooping configured, the interfaces directly or indirectly connected to a valid DHCP server are generally configured as trusted interfaces.

Procedure

Configure the interface as a trusted interface.

Choose Security > DHCP Snooping > Interface Trust Configuration in the navigation tree to open the Interface Trust Configuration page

Table 1 describes the parameters on the page.

**Table 1** Interface Trust Configuration
Parameter		Description
Interface Name		Indicates the name of the interface.
Status		Indicates whether the interface is a trusted interface.

Select an interface and click Configure to open the Interface Trust Configuration page

Table 2 describes the parameters on the page.

**Table 2** Interface Trust Configuration on Specified Interface
Parameter		Description
Interface name		Indicates the interface where the DHCP snooping function will be configured.
Status		Indicates the interface status, including trusted and untrusted.

Enable the DHCP snooping function and click OK.

Update interface status.
1. Choose Security > DHCP Snooping > Interface Trust Configuration in the navigation tree to open the Interface Trust Configuration page.
2. Click Refresh.
Query interface status.
1. Choose Security > DHCP Snooping > Interface Trust Configuration in the navigation tree to open the Interface Trust Configuration page.
2. In the Query area, select an interface type and enter the interface number, and click Query.