•  JunosE 15.1.x DHCP Relay and Relay Proxy
  •  Copyright and Trademark Information
  •  Table of Contents
  •  List of Figures
  •  List of Tables
  •   About the Documentation
    •  E Series and JunosE Documentation and Release Notes
    •  Audience
    •  E Series and JunosE Text and Syntax Conventions
    •  Obtaining Documentation
    •  Documentation Feedback
    •  Requesting Technical Support
  •   Overview
    •   How DHCP Relay Works
      •  DHCP Relay and BOOTP Relay Overview
      •   Rate of DHCP Client Packets Processed by DHCP Relay Overview
        •  Manually Configuring the Maximum Rate of Client Packets Processed Per Second by DHCP Relay
    •   DHCP Option 60 Attribute for Traffic Forwarding
      •  Using Option 60 Strings to Forward Client Traffic to Specific DHCP Servers
    •   DHCP Option 82 Attribute and Suboptions for Traffic Forwarding
      •   DHCP Relay Agent Information Option (Option 82) Suboption Values Overview
        •  Format of the JunosE Data Field in the Vendor-Specific Suboption for Option 82
  •   Configuration
    •   Configuration Tasks for DHCP Relay Functions
      •   Configuring DHCP Relay Settings
        •  Enabling DHCP Relay
        •  Removing Access Routes from Routing Tables and NVS
        •  Treating All Packets as Originating at Trusted Sources
        •  Assigning the Giaddr to Source IP Address
        •  Protecting Against Spoofed Giaddr and Relay Agent Option Values
        •  Using the Giaddr to Identify the Primary Interface for Dynamic Subscriber Interfaces
      •   Configuring DHCP Relay Proxy
        •  Enabling DHCP Relay Proxy
        •  Use the First Offer from a DHCP Server
        •  Set a Timeout for DHCP Client Renewal Messages
      •   Managing Host Routes Using DHCP Relay Proxy
        •  Selecting the DHCP Server Response
        •  Behavior for Bound Clients and Address Renewals
    •   Broadcast Flag Settings for DHCP Relay
      •  Using the Broadcast Flag Setting to Control Transmission of DHCP Reply Packets
      •  Interaction of DHCP Relay Broadcast Flag with the Layer 2 Unicast Transmission Method
    •   Preventing Host Routes Installation
      •  Preventing DHCP Relay from Installing Host Routes by Default
      •  Including Relay Agent Option Values in the PPPoE Remote Circuit ID
    •   Configuring DHCP Option 60 for Relaying Packets
      •  Configuring the DHCP Relay Option 60 Attribute for Traffic Forwarding
      •  Relaying DHCP Packets That Originate from a Cable Modem
    •   Configuring DHCP Option 82 and Suboptions for Relaying Packets
      •   Configuring the DHCP Relay Agent Option 82 Settings
        •  Configuring Relay Agent Option 82 Information
        •  Preventing Option 82 Information from Being Stripped from Trusted Client Packets
        •  Configuring Relay Agent Information Option (Option 82) Suboption Values
      •  Using the set dhcp relay agent Command to Enable Option 82 Suboption Support
      •  Using the set dhcp relay agent sub-option Command to Enable Option 82 Suboption Support
    •   Unicast Tranmission of DHCP Replies
      •  Configuring the Layer 2 Unicast Transmission Method for Reply Packets to DHCP Clients
    •   Examples
      •  Example: Preventing Installation of Host Routes
      •  Example: Using DHCP Relay Option 82 to Pass IEEE 802.1p Values to DHCP Servers
    •   Configuration Commands
      •  interface ip
      •  ip route
      •  ip share-interface
      •  ip source-prefix
      •  ip unnumbered
      •  service dhcp-local
      •  set dhcp relay
      •  set dhcp relay agent sub-option
      •  set dhcp relay assign-giaddr-source-ip
      •  set dhcp relay broadcast-flag-replies
      •  set dhcp relay giaddr-selects-interface
      •  set dhcp relay layer2-unicast-replies
      •  set dhcp relay max-client-packet-rate
      •  set dhcp relay options
      •  set dhcp relay override
      •  set dhcp relay preserve-trusted-client-option
      •  set dhcp relay proxy send-first-offer
      •  set dhcp relay proxy timeout
      •  set dhcp relay trust-all
      •  set dhcp vendor-option
  •   Administration
    •   Configuring Baselines for DHCP Relay and Relay Proxy Statistics
      •   Setting Baselines for DHCP Statistics
        •  Setting a Baseline for DHCP Relay and Relay Proxy
        •  Setting a Baseline for DHCP Proxy Server Statistics
        •  Setting a Baseline for DHCP External Server Statistics
        •  Setting a Baseline for DHCP Local Server Statistics
    •   Monitoring DHCP Relay and Relay Proxy Settings
      •  Monitoring DHCP Relay Configuration Information
      •  Monitoring DHCP Option 60 Information
      •  Monitoring DHCP Packet Capture Settings
    •   Monitoring DHCP Relay and Relay Proxy Statistics
      •  Monitoring DHCP Relay Statistics
      •  Monitoring DHCP Relay Proxy Statistics
    •   Monitoring Commands
      •  show dhcp relay
      •  show dhcp relay proxy statistics
      •  show dhcp relay statistics
      •  show dhcp vendor-option
  •   Index
    •  Index

A

agent circuit ID (suboption 1)

agent remote ID (suboption 2)

agent-circuit-id    

including in PPPoE remote circuit ID format

agent-remote-id    

including in PPPoE remote circuit ID format

B

B-RAS commands    

set dhcp relay

set dhcp relay agent sub-option

set dhcp relay assign-giaddr-source-ip

set dhcp relay broadcast-flag-replies

set dhcp relay giaddr-selects-interface

set dhcp relay layer2-unicast-replies

set dhcp relay max-client-packet-rate

set dhcp relay options

set dhcp relay override

set dhcp relay preserve-trusted-client-option

set dhcp relay proxy set dhcp relay proxy send-first-offer

set dhcp relay proxy timeout

set dhcp relay trust-all

set dhcp vendor-option

show dhcp relay

show dhcp relay proxy statistics

show dhcp relay statistics

show dhcp vendor-option

baseline commands    

baseline dhcp relay

baseline dhcp server

baseline dhcp-local    1, 2, 3

baseline dhcpv6-local    1, 2, 3

baseline ip dhcp-external

BFD commands    

ip route

BGP commands    

ip route parent-router

ip route vrf

BGP/MPLS VPN commands    

ip route parent-router

ip route vrf

ip share-interface

BOOTP (bootstrap protocol)

bootstrap protocol.     See BOOTP    

bridged IP commands    

set dhcp relay

set dhcp relay proxy timeout

show dhcp relay

show dhcp relay proxy statistics

show dhcp relay statistics

broadcast flag, DHCP    

controlling transmission of DHCP reply packets

interaction with layer 2 unicast transmission method

C

cable modem DHCP relay

conventions    

notice icons

text and syntax

customer support    1

contacting JTAC

D

DHCP (Dynamic Host Configuration Protocol)    

configuring BOOTP Relay

configuring DHCP relay proxy    1, 2

giaddr

option 82    1, 2, 3, 4, 5, 6, 7, 8, 9

source IP address

trust-all

DHCP broadcast flag    

interaction with layer 2 unicast transmission method

DHCP commands    

service dhcp-local

DHCP logging

DHCP option 60 cable modem DHCP relay

DHCP option 60 strings

DHCP packets    

logging

DHCP relay    

configuring

creating

logging information

preventing host route installation

removing

spoofed giaddr

spoofed relay agent option

DHCP relay agent information option    

agent circuit ID (suboption 1)

agent remote ID (suboption 2)

vendor-specific (suboption 9)

DHCP relay and BOOTP relay    

configuring

DHCP relay proxy    

best offer

configuring

first offer

DHCP vendor class identifier option

documentation set    

comments on

G

giaddr

I

interface commands    

interface ip

ip share-interface

IP commands    

ip route

ip source-prefix

ip unnumbered

L

L2TP commands    

show dhcp relay

show dhcp relay proxy statistics

show dhcp relay statistics

M

manuals    

comments on

N

notice icons

O

option 82    1, 2, 3, 4, 5, 6, 7

P

PPPoE remote circuit ID

R

radius remote-circuit-id-format command

S

set dhcp commands    

set dhcp vendor-option

set dhcp relay commands    

set dhcp relay

set dhcp relay agent sub-option

set dhcp relay assign-giaddr-source-ip

set dhcp relay broadcast-flag-replies    1, 2

set dhcp relay layer2-unicast-replies    1, 2

set dhcp relay options

set dhcp relay override

set dhcp relay preserve-trusted-client-option

set dhcp relay proxy

set dhcp relay trust-all

set dhcp relay proxy commands    

set dhcp relay proxy

set dhcp relay proxy send-first-offer

set dhcp relay proxy timeout

set dhcp vendor-option command

show dhcp commands    

show dhcp relay

show dhcp relay proxy statistics

show dhcp relay statistics

show dhcp vendor-option command

show ip dhcp-capture command

subscriber interface commands    

ip source-prefix

set dhcp relay giaddr-selects-interface

support, technical     See technical support    

T

technical support    

contacting JTAC

text and syntax conventions

V

vendor class identifier option

vendor-specific (suboption 9)