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Table of Contents 
1 DHCP Overview··········································································································································1-1 
Introduction to DHCP······························································································································1-1 
DHCP IP Address Assignment ···············································································································1-1 
IP Address Assignment Policy ········································································································1-1 
Obtaining IP Addresses Dynamically ······························································································1-2 
Updating IP Address Lease·············································································································1-3 
DHCP Packet Format······························································································································1-3 
Protocol Specification······························································································································1-4 
2 DHCP Relay Agent Configuration············································································································2-1 
Introduction to DHCP Relay Agent ·········································································································2-1 
Usage of DHCP Relay Agent ··········································································································2-1 
DHCP Relay Agent Fundamentals··································································································2-1 
Option 82 Support on DHCP Relay Agent ······················································································2-2 
Configuring the DHCP Relay Agent········································································································2-3 
DHCP Relay Agent Configuration Task List····················································································2-3 
Correlating a DHCP Server Group with a Relay Agent Interface····················································2-4 
Configuring DHCP Relay Agent Security Functions ·······································································2-5 
Configuring the DHCP Relay Agent to Support Option 82······························································2-6 
Displaying and Maintaining DHCP Relay Agent Configuration·······························································2-7 
DHCP Relay Agent Configuration Example····························································································2-7 
Troubleshooting DHCP Relay Agent Configuration················································································2-8 
3 DHCP/BOOTP Client Configuration·········································································································3-1 
Introduction to DHCP Client····················································································································3-1 
Introduction to BOOTP Client ·················································································································3-1 
Configuring a DHCP/BOOTP Client········································································································3-1 
Displaying DHCP/BOOTP Client Configuration······················································································3-2 
DHCP/BOOTP Client Configuration Example ························································································3-2 
DHCP Client Configuration Example·······························································································3-2 
BOOTP Client Configuration Example ····························································································3-3