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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
Protocols and Standards·························································································································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
DHCP Relay Agent Support for Option 82 ······················································································2-2
Configuring the DHCP Relay Agent········································································································2-4
DHCP Relay Agent Configuration Task List····················································································2-4
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······························································2-7
Displaying and Maintaining DHCP Relay Agent Configuration·······························································2-8
DHCP Relay Agent Configuration Example····························································································2-8
Troubleshooting DHCP Relay Agent Configuration················································································2-9
3 DHCP Snooping Configuration ················································································································3-1
DHCP Snooping Overview······················································································································3-1
Function of DHCP Snooping ···········································································································3-1
Overview of DHCP Snooping Option 82 ·························································································3-2
Overview of IP Filtering ···················································································································3-4
DHCP Snooping Configuration ···············································································································3-5
Configuring DHCP Snooping···········································································································3-5
Configuring DHCP Snooping to Support Option 82 ········································································3-6
Configuring IP Filtering····················································································································3-9
DHCP Snooping Configuration Example ······························································································3-10
DHCP-Snooping Option 82 Support Configuration Example························································3-10
IP Filtering Configuration Example································································································3-11
Displaying and Maintaining DHCP Snooping Configuration·································································3-13
4 DHCP/BOOTP Client Configuration·········································································································4-1
Introduction to DHCP Client····················································································································4-1
Introduction to BOOTP Client ·················································································································4-1
Configuring a DHCP/BOOTP Client········································································································4-1
DHCP Client Configuration Example ······································································································4-2
Displaying and Maintaining DHCP/BOOTP Client Configuration ···························································4-3
