Dhcp Relay Agent Configuration; Dhcp Snooping Configuration - 3Com 4500 PWR 26-Port Configuration Manual

Configuring BIMS Server Information for the DHCP Client......................................................... 39-21
Configuring Option 184 Parameters for the Client with Voice Service........................................ 39-21
Configuring the TFTP Server and Bootfile Name for the DHCP Client....................................... 39-22
Configuring a Self-Defined DHCP Option ................................................................................... 39-23
Configuring DHCP Server Security Functions .................................................................................... 39-24
Prerequisites................................................................................................................................ 39-24
Enabling Unauthorized DHCP Server Detection......................................................................... 39-24
Configuring IP Address Detecting ............................................................................................... 39-24
Configuring DHCP Accounting Functions ........................................................................................... 39-25
Introduction to DHCP Accounting................................................................................................ 39-25
DHCP Accounting Fundamentals................................................................................................ 39-25
DHCP Accounting Configuration ................................................................................................. 39-26
Enabling the DHCP Server to Process Option 82 .............................................................................. 39-26
Displaying and Maintaining the DHCP Server .................................................................................... 39-26
DHCP Server Configuration Examples ............................................................................................... 39-27
DHCP Server Configuration Example ......................................................................................... 39-27
DHCP Server with Option 184 Support Configuration Example ................................................. 39-29
DHCP Accounting Configuration Example .................................................................................. 39-30
Troubleshooting a DHCP Server ........................................................................................................ 39-32

40 DHCP Relay Agent Configuration ........................................................................................................ 40-1

Introduction to DHCP Relay Agent ....................................................................................................... 40-1
Usage of DHCP Relay Agent ........................................................................................................ 40-1
DHCP Relay Agent Fundamentals................................................................................................ 40-1
Option 82 Support on DHCP Relay Agent .................................................................................... 40-2
DHCP Inform Message Handling Feature Used in XRN System ......................................................... 40-3
Configuring the DHCP Relay Agent...................................................................................................... 40-4
DHCP Relay Agent Configuration Task List.................................................................................. 40-4
Enabling DHCP ............................................................................................................................. 40-4
Correlating a DHCP Server Group with a Relay Agent Interface.................................................. 40-5
Configuring DHCP Relay Agent Security Functions ..................................................................... 40-6
Configuring the DHCP Relay Agent to Support Option 82............................................................ 40-8
Configuring DHCP Inform Message Handling Feature Used in XRN System...................................... 40-9
Displaying and Maintaining DHCP Relay Agent Configuration ............................................................ 40-9
DHCP Relay Agent Configuration Example........................................................................................ 40-10
Troubleshooting DHCP Relay Agent Configuration............................................................................ 40-10

41 DHCP Snooping Configuration............................................................................................................. 41-1

DHCP Snooping Overview.................................................................................................................... 41-1
Introduction to DHCP Snooping .................................................................................................... 41-1
Introduction to DHCP-Snooping Option 82 ................................................................................... 41-2
Introduction to IP Filtering ............................................................................................................. 41-4
Configuring DHCP Snooping ................................................................................................................ 41-5
Configuring DHCP Snooping......................................................................................................... 41-5
Configuring DHCP Snooping to Support Option 82 ...................................................................... 41-6
Configuring IP Filtering .................................................................................................................. 41-9
Displaying and Maintaining DHCP Snooping Configuration ............................................................... 41-10
DHCP Snooping Configuration Examples .......................................................................................... 41-11
DHCP-Snooping Option 82 Support Configuration Example ...................................................... 41-11
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