3-8To do… Use the command… RemarksEnable Option 82 support onthe DHCP relay agentdhcp relay informationenableRequiredDisabled by default.Configure the strategy for theDHCP relay agent to processrequest packets containingOption 82dhcp relay informationstrategy { drop | keep |replace }OptionalBy default, the replace strategyis adoptedz By default, with the Option 82 support function enabled on the DHCP relay agent, the DHCP relayagent will adopt the replace strategy to process the request packets containing Option 82.However, if other strategies are configured before, then enabling the 82 support on the DHCPrelay agent will not change the configured strategies.z To enable Option 82, you need to perform the corresponding configuration on the DHCP serverand the DHCP relay agent.Displaying and Maintaining DHCP Relay Agent ConfigurationTo do… Use the command… RemarksDisplay the information about aspecified DHCP server group display dhcp-server groupNoDisplay the information aboutthe DHCP server group towhich a specified VLANinterface is mappeddisplay dhcp-server interfaceVlan-interface vlan-idDisplay the specified clientaddress entries on the DHCPrelay agentdisplay dhcp-security[ ip-address | dynamic | static |tracker ]Available in any viewClear the statistics informationof the specified DHCP servergroupreset dhcp-server groupNo Available in user viewDHCP Relay Agent Configuration ExampleNetwork requirementsVLAN-interface 1 on the DHCP relay agent (Switch A) connects to the network where DHCP clientsreside. The IP address of VLAN-interface 1 is 10.10.1.1/24 and IP address of VLAN-interface 2 is10.1.1.2/24 that communicates with the DHCP server 10.1.1.1/24. As shown in the figure below, SwitchA forwards messages between DHCP clients and the DHCP server to assign IP addresses in subnet10.10.1.0/24 to the clients.
