Juniper JUNOSE SOFTWARE FOR E SERIES 11.3.X - BROADBAND ACCESS CONFIGURATION GUIDE 2010-10-12 Configuration Manual page 21

Chapter 20
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Setting Grace Periods for Address Leases . . . . . . . . . . . . . . . . . . . . . . . . . . . 482
Configuring AAA Authentication for DHCP Local Server Standalone Mode . . . . 483
Configuring the DHCPv6 Local Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 485
Deleting DHCPv6 Client Bindings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486
Configuring the Router to Work with the SRC Software . . . . . . . . . . . . . . . . . . . . 487
Configuring DHCP Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 491
Configuring DHCP Relay and BOOTP Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 491
Enabling DHCP Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 492
Removing Access Routes from Routing Tables and NVS . . . . . . . . . . . . . . . 492
Treating All Packets as Originating at Trusted Sources . . . . . . . . . . . . . . . . . 493
Assigning the Giaddr to Source IP Address . . . . . . . . . . . . . . . . . . . . . . . . . . 493
Protecting Against Spoofed Giaddr and Relay Agent Option Values . . . . . . 493
Using the Broadcast Flag Setting to Control Transmission of DHCP Reply
Packets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 494
Interaction with Layer 2 Unicast Transmission Method . . . . . . . . . . . . . 495
Preventing DHCP Relay from Installing Host Routes by Default . . . . . . . . . 496
Configuration Example-Preventing Installation of Host Routes . . . . . 496
Including Relay Agent Option Values in the PPPoE Remote Circuit ID . . . . . 497
Using the Giaddr to Identify the Primary Interface for Dynamic Subscriber
Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 498
Configuring Layer 2 Unicast Transmission Method for Reply Packets to
DHCP Clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 498
Using Option 60 Strings to Forward Client Traffic to Specific DHCP
Servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 499
Configuration Example-Using DHCP Relay Option 60 to Specify Traffic
Forwarding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 501
Relaying DHCP Packets That Originate from a Cable Modem . . . . . . . . . . . 502
Configuring Relay Agent Option 82 Information . . . . . . . . . . . . . . . . . . . . . . 502
Preventing Option 82 Information from Being Stripped from Trusted Client
Packets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503
Configuring Relay Agent Information Option (Option 82) Suboption
Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 503
Format of the JunosE Data Field in the Vendor-Specific Suboption for
Option 82 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 505
Using the set dhcp relay agent sub-option Command to Enable Option
82 Suboption Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 507
Configuration Example-Using DHCP Relay Option 82 to Pass IEEE
802.1p Values to DHCP Servers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 509
Using the set dhcp relay agent Command to Enable Option 82
Suboption Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 512
Rate of DHCP Client Packets Processed by DHCP Relay Overview . . . . . . . . . . . 514
Manually Configuring the Maximum Rate of Client Packets Processed Per
Second by DHCP Relay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 514
Configuring the Rate of Client Packets Processed by DHCP Relay . . . . . . . . . . . . 515
Configuring DHCP Relay Proxy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 515
Enabling DHCP Relay Proxy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 515
Use the First Offer from a DHCP Server . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 515
Set a Timeout for DHCP Client Renewal Messages . . . . . . . . . . . . . . . . . . . . 516
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