3-11DHCP Snooping Configuration ExamplesDHCP-Snooping Option 82 Support Configuration ExampleNetwork requirementsAs shown in Figure 3-6 , GigabitEthernet 1/0/5 of the switch is connected to the DHCP server, andGigabitEthernet 1/0/1, GigabitEthernet 1/0/2, and GigabitEthernet 1/0/3 are respectively connected toClient A, Client B, and Client C.z Enable DHCP snooping on the switch.z Specify GigabitEthernet 1/0/5 on the switch as a trusted port for DHCP snooping.z Enable DHCP-snooping Option 82 support on the switch and set the remote ID field in Option 82 tothe system name of the switch. Set the circuit ID sub-option to abcd in DHCP packets from VLAN 1on GigabitEthernet 1/0/3.Network diagramFigure 3-6 Network diagram for DHCP-snooping Option 82 support configurationConfiguration procedure# Enable DHCP snooping on the switch. system-view[Switch] dhcp-snooping# Specify GigabitEthernet 1/0/5 as the trusted port.[Switch] interface GigabitEthernet1/0/5[Switch-GigabitEthernet1/0/5] dhcp-snooping trust[Switch-GigabitEthernet1/0/5] quit# Enable DHCP-snooping Option 82 support.[Switch] dhcp-snooping information enable# Set the remote ID sub-option in Option 82 to the system name (sysname) of the DHCP snoopingdevice.[Switch] dhcp-snooping information remote-id sysname
