Figure 14: Dhcp External Server; Chapter 21 Configuring The Dhcp External Server Application - Juniper JUNOSE SOFTWARE 11.0.X - BROADBAND ACCESS CONFIGURATION GUIDE 4-1-2010 Configuration Manual

Chapter 21
Configuring the DHCP External Server
Application
DHCP External Server Overview
The following sections describe how to configure the DHCP external server application
on the E Series router:
DHCP External Server Overview on page 517
Preservation of Dynamic Subscriber Interfaces with DHCP External Server
Overview on page 519
DHCP External Server Identification of Clients with Duplicate MAC Addresses
Overview on page 520
DHCP External Server Configuration Requirements on page 522
Enabling and Disabling the DHCP External Server Application on page 522
Monitoring DHCP Traffic Between Remote Clients and DHCP Servers on page 523
Synchronizing the DHCP External Application and the Router on page 523
Configuring Interoperation with Ethernet DSLAMs on page 523
Configuring the DHCP External Server to Support the Creation of Dynamic
Subscriber Interfaces on page 524
Configuring DHCP External Server to Control Preservation of Dynamic Subscriber
Interfaces on page 526
Configuring Dynamic Subscriber Interfaces for Interoperation with DHCP Relay
and DHCP Relay Proxy on page 527
Deleting Clients from a Virtual Router's DHCP Binding Table on page 528
Configuring DHCP External Server to Uniquely Identify Clients with Duplicate
MAC Addresses on page 530
Configuring DHCP External Server to Re-Authenticate Auto-Detected Dynamic
Subscriber Interfaces on page 531
You can configure the E Series router to provide support for an external DHCP server.
This enables the router, which is not running DHCP relay or DHCP proxy server, to
monitor DHCP packets and to keep information for subscribers based on their IP
address and MAC address. When the E Series router's DHCP external server
application is used, all DHCP traffic to and from the DHCP server is monitored by
the router.
DHCP External Server Overview
517