iiSelf-Defined Option Configuration Example··················································································2-19Troubleshooting DHCP Server Configuration ·······················································································2-203 DHCP Relay Agent Configuration ············································································································3-1Introduction to DHCP Relay Agent ·········································································································3-1Application Environment··················································································································3-1Fundamentals··································································································································3-1DHCP Relay Agent Support for Option 82 ······················································································3-2DHCP Relay Agent Configuration Task List ···························································································3-3Configuring the DHCP Relay Agent········································································································3-3Enabling DHCP ·······························································································································3-3Enabling the DHCP Relay Agent on an Interface ···········································································3-3Correlating a DHCP Server Group with a Relay Agent Interface····················································3-4Configuring the DHCP Relay Agent Security Functions ·································································3-5Configuring the DHCP Relay Agent to Send a DHCP-Release Request ·······································3-6Configuring the DHCP Relay Agent to Support Option 82······························································3-7Displaying and Maintaining DHCP Relay Agent Configuration·······························································3-8DHCP Relay Agent Configuration Examples··························································································3-9DHCP Relay Agent Configuration Example ····················································································3-9DHCP Relay Agent Option 82 Support Configuration Example····················································3-10Troubleshooting DHCP Relay Agent Configuration··············································································3-114 DHCP Client Configuration·······················································································································4-1Introduction to DHCP Client····················································································································4-1Enabling the DHCP Client on an Interface ·····························································································4-1Displaying and Maintaining the DHCP Client ·························································································4-2DHCP Client Configuration Example ······································································································4-25 DHCP Snooping Configuration ················································································································5-1DHCP Snooping Overview······················································································································5-1Functions of DHCP Snooping ·········································································································5-1Application Environment of Trusted Ports ·······················································································5-2DHCP Snooping Support for Option 82···························································································5-3Configuring DHCP Snooping Basic Functions························································································5-4Configuring DHCP Snooping to Support Option 82················································································5-5Prerequisites····································································································································5-5Configuring DHCP Snooping to Support Option 82 ········································································5-5Displaying and Maintaining DHCP Snooping ·························································································5-7DHCP Snooping Configuration Examples ······························································································5-8DHCP Snooping Configuration Example·························································································5-8DHCP Snooping Option 82 Support Configuration Example ··························································5-8
