3-6Table 3-3 DHCP snooping user information configuration itemsItem DescriptionIP Address This field displays the IP address assigned by the DHCP server to theclient.MAC Address This field displays the MAC address of the client.TypeThis field displays the client type, which can be:z Dynamic: The IP-to-MAC binding is generated dynamically.z Static: The IP-to-MAC binding is configured manually. Currently, staticbindings are not supported.Interface Name This field displays the device interface to which the client is connected.VLAN This field displays the VLAN to which the device belongs.Remaining Lease Time This field displays the remaining lease time of the IP address.Return to DHCP Snooping Configuration Task List.DHCP Snooping Configuration ExampleNetwork requirementsAs shown in Figure 3-6, a DHCP snooping device (Switch B) is connected to a DHCP server throughGigabitEthernet 1/0/1, and to DHCP clients through GigabitEthernet 1/0/2 and GigabitEthernet 1/0/3.z Enable DHCP snooping on Switch B and configure DHCP snooping to support Option 82.Configure the handling strategy for DHCP requests containing Option 82 as replace.z Enable GigabitEthernet 1/0/1 to forward DHCP server responses; disable GigabitEthernet 1/0/2and GigabitEthernet 1/0/3 from forwarding DHCP server responses.z Configure Switch B to record clients’ IP-to-MAC address bindings in DHCP-REQUEST messagesand DHCP-ACK messages received from a trusted port.Figure 3-6 Network diagram for DHCP snooping configurationConfiguration procedure# Enable DHCP snooping.z Select Network > DHCP from the navigation tree, and then click the DHCP Snooping tab. Performthe following operation, as shown in Figure 3-7.
