Juniper JUNOSE 11.1.X - BROADBAND ACCESS CONFIGURATION GUIDE 6-4-2010 Configuration Manual page 22

JUNOSe 11.1.x Broadband Access Configuration Guide
Chapter 21
xxii
Table of Contents
Using the Broadcast Flag Setting to Control Transmission of DHCP Reply
Packets ...........................................................................................498
Interaction with Layer 2 Unicast Transmission Method ..................499
Preventing DHCP Relay from Installing Host Routes by Default ............500
Configuration Example Preventing Installation of Host Routes .....500
Including Relay Agent Option Values in the PPPoE Remote Circuit
ID ...................................................................................................501
Using the Giaddr to Identify the Primary Interface for Dynamic Subscriber
Interfaces .......................................................................................502
Configuring Layer 2 Unicast Transmission Method for Reply Packets to
DHCP Clients ..................................................................................502
Using Option 60 Strings to Forward Client Traffic to Specific DHCP
Servers ...........................................................................................503
Configuration Example Using DHCP Relay Option 60 to Specify
Traffic Forwarding ...................................................................505
Relaying DHCP Packets That Originate from a Cable Modem ...............506
Configuring Relay Agent Option 82 Information ...................................506
Preventing Option 82 Information from Being Stripped from Trusted
Client Packets .................................................................................507
Configuring Relay Agent Information Option (Option 82) Suboption
Values ............................................................................................507
Format of the JUNOSe Data Field in the Vendor-Specific Suboption
for Option 82 ...........................................................................509
Using the set dhcp relay agent sub-option Command to Enable
Option 82 Suboption Support ..................................................511
Configuration Example Using DHCP Relay Option 82 to Pass IEEE
802.1p Values to DHCP Servers ...............................................513
Using the set dhcp relay agent Command to Enable Option 82
Suboption Support ...................................................................516
Configuring DHCP Relay Proxy ...................................................................518
Enabling DHCP Relay Proxy .................................................................519
Use the First Offer from a DHCP Server ................................................519
Set a Timeout for DHCP Client Renewal Messages ................................519
Managing Host Routes ..........................................................................519
Selecting the DHCP Server Response ..............................................520
Behavior for Bound Clients and Address Renewals .........................520
Configuring the DHCP External Server Application
DHCP External Server Overview .................................................................523
Preservation of Dynamic Subscriber Interfaces with DHCP External Server
Overview ..............................................................................................525
DHCP External Server Identification of Clients with Duplicate MAC Addresses
Overview ..............................................................................................526
Configuration Guidelines for Using Duplicate MAC Mode ......................527
Restrictions for Using Duplicate MAC Mode to Manage Clients .............527
DHCP External Server Configuration Requirements ....................................528
Enabling and Disabling the DHCP External Server Application ....................528
Monitoring DHCP Traffic Between Remote Clients and DHCP Servers ........529
Synchronizing the DHCP External Application and the Router ....................529
523