Juniper JUNOSE SOFTWARE 11.0.X - BROADBAND ACCESS CONFIGURATION GUIDE 4-1-2010 Configuration Manual page 22

JUNOSe 11.0.x Broadband Access Configuration Guide
Chapter 21
xxii
Table of Contents
Using the Broadcast Flag Setting to Control Transmission of DHCP Reply
Packets ...........................................................................................492
Interaction with Layer 2 Unicast Transmission Method ..................493
Preventing DHCP Relay from Installing Host Routes by Default ............494
Configuration Example Preventing Installation of Host Routes .....494
Including Relay Agent Option Values in the PPPoE Remote Circuit
ID ...................................................................................................495
Using the Giaddr to Identify the Primary Interface for Dynamic Subscriber
Interfaces .......................................................................................496
Configuring Layer 2 Unicast Transmission Method for Reply Packets to
DHCP Clients ..................................................................................496
Using Option 60 Strings to Forward Client Traffic to Specific DHCP
Servers ...........................................................................................497
Configuration Example Using DHCP Relay Option 60 to Specify
Traffic Forwarding ...................................................................499
Relaying DHCP Packets That Originate from a Cable Modem ...............500
Configuring Relay Agent Option 82 Information ...................................500
Preventing Option 82 Information from Being Stripped from Trusted
Client Packets .................................................................................501
Configuring Relay Agent Information Option (Option 82) Suboption
Values ............................................................................................501
Format of the JUNOSe Data Field in the Vendor-Specific Suboption
for Option 82 ...........................................................................503
Using the set dhcp relay agent sub-option Command to Enable
Option 82 Suboption Support ..................................................505
Configuration Example Using DHCP Relay Option 82 to Pass IEEE
802.1p Values to DHCP Servers ...............................................507
Using the set dhcp relay agent Command to Enable Option 82
Suboption Support ...................................................................510
Configuring DHCP Relay Proxy ...................................................................512
Enabling DHCP Relay Proxy .................................................................513
Use the First Offer from a DHCP Server ................................................513
Set a Timeout for DHCP Client Renewal Messages ................................513
Managing Host Routes ..........................................................................513
Selecting the DHCP Server Response ..............................................514
Behavior for Bound Clients and Address Renewals .........................514
Configuring the DHCP External Server Application
DHCP External Server Overview .................................................................517
Preservation of Dynamic Subscriber Interfaces with DHCP External Server
Overview ..............................................................................................519
DHCP External Server Identification of Clients with Duplicate MAC Addresses
Overview ..............................................................................................520
Configuration Guidelines for Using Duplicate MAC Mode ......................521
Restrictions for Using Duplicate MAC Mode to Manage Clients .............521
DHCP External Server Configuration Requirements ....................................522
Enabling and Disabling the DHCP External Server Application ....................522
Monitoring DHCP Traffic Between Remote Clients and DHCP Servers ........523
Synchronizing the DHCP External Application and the Router ....................523
517