TechLibrary

DHCP Local Server
Extended DHCP Local Server Overview DHCPv6 Local Server Overview DHCP Local Server Handling of Client Information Request Messages DHCP Duplicate Client Differentiation Using Client Subinterface Overview Group-Specific DHCP Local Server Options Understanding Dynamic Reconfiguration of Extended DHCP Local Server Clients DHCP Snooping Support DHCP Auto Logout Overview Address-Assignment Pools Overview Use of DHCP Option 50 and DHCPv6 IA_NA Option to Request a Specific IP Address Multiple Address Assignment for DHCPv6 Clients Centrally Configured Opaque DHCP Options Graceful Routing Engine Switchover Port Number Requirements for DHCP Firewall Filters

DHCP Local Server

Extended DHCP Local Server Overview

DHCPv6 Local Server Overview

DHCP Local Server Handling of Client Information Request Messages

DHCP Duplicate Client Differentiation Using Client Subinterface Overview

Group-Specific DHCP Local Server Options

Understanding Dynamic Reconfiguration of Extended DHCP Local Server Clients

DHCP Snooping Support

DHCP Auto Logout Overview

Address-Assignment Pools Overview

Use of DHCP Option 50 and DHCPv6 IA_NA Option to Request a Specific IP Address

Multiple Address Assignment for DHCPv6 Clients

Centrally Configured Opaque DHCP Options

Graceful Routing Engine Switchover

Port Number Requirements for DHCP Firewall Filters

DHCP Relay Agent
Extended DHCP Relay Agent Overview DHCP Relay Proxy Overview DHCPv6 Relay Agent Overview DHCP Duplicate Client Differentiation Using Client Subinterface Overview Group-Specific DHCP Relay Options DHCP Snooping Support DHCP Auto Logout Overview Graceful Routing Engine Switchover Port Number Requirements for DHCP Firewall Filters

DHCP Relay Agent

Extended DHCP Relay Agent Overview

DHCP Relay Proxy Overview

DHCPv6 Relay Agent Overview

DHCP Duplicate Client Differentiation Using Client Subinterface Overview

Group-Specific DHCP Relay Options

DHCP Snooping Support

DHCP Auto Logout Overview

Graceful Routing Engine Switchover

Port Number Requirements for DHCP Firewall Filters

DHCP Local Server Examples
Example: Minimum Extended DHCP Local Server Configuration Example: Extended DHCP Local Server Configuration with Optional Pool Matching Example: Configuring Group Liveness Detection for DHCP Local Server Clients

DHCP Local Server Examples

Example: Minimum Extended DHCP Local Server Configuration

Example: Extended DHCP Local Server Configuration with Optional Pool Matching

Example: Configuring Group Liveness Detection for DHCP Local Server Clients

DHCP Relay Agent Examples
Example: Minimum DHCP Relay Agent Configuration Example: Configuring DHCP Relay Agent Selective Traffic Processing Based on DHCP Option Strings Example: Configuring DHCP Snooping Support for DHCP Relay Agent

DHCP Relay Agent Examples

Example: Minimum DHCP Relay Agent Configuration

Example: Configuring DHCP Relay Agent Selective Traffic Processing Based on DHCP Option Strings

Example: Configuring DHCP Snooping Support for DHCP Relay Agent

Configuration Tasks for DHCP Local Server
Using External AAA Authentication Services with DHCP Guidelines for Configuring Support for DHCP Duplicate Clients Configuring DHCP Duplicate Client Support Grouping Interfaces with Common DHCP Configurations Guidelines for Configuring Interface Ranges Overriding Default DHCP Local Server Configuration Settings Specifying the Maximum Number of DHCP Clients Per Interface Disabling ARP Table Population Automatically Logging Out DHCP Clients Enabling Processing of Client Information Requests Specifying the Delegated Address Pool for IPv6 Prefix Assignment Enabling DHCPv6 Rapid Commit Support Deleting DHCP Local Server and DHCP Relay Override Settings Configuring Extended DHCP Local Server Dynamic Client Reconfiguration Configuring Dynamic Reconfiguration Attempts for DHCP Clients Configuring Deletion of the Client When Dynamic Reconfiguration Fails Configuring Reconfiguration of the Client on Receipt of RADIUS-Initiated Disconnect Configuring a Token for DHCP Local Server Authentication Preventing Binding of Clients That Do Not Support Reconfigure Messages Requesting DHCP Local Server to Initiate Reconfiguration of Client Bindings Configuring Detection of DHCP Local Server Client Connectivity Attaching Dynamic Profiles to DHCP Subscriber Interfaces or DHCP Client Interfaces Configuring DHCP Snooped Packets Forwarding Support for DHCP Local Server Configuring Passwords for Usernames Creating Unique Usernames for DHCP Clients Configuring How the Extended DHCP Local Server Determines Which Address-Assignment Pool to Use

Configuration Tasks for DHCP Local Server

Using External AAA Authentication Services with DHCP

Guidelines for Configuring Support for DHCP Duplicate Clients

Configuring DHCP Duplicate Client Support

Grouping Interfaces with Common DHCP Configurations

Guidelines for Configuring Interface Ranges

Overriding Default DHCP Local Server Configuration Settings

Specifying the Maximum Number of DHCP Clients Per Interface

Disabling ARP Table Population

Automatically Logging Out DHCP Clients

Enabling Processing of Client Information Requests

Specifying the Delegated Address Pool for IPv6 Prefix Assignment

Enabling DHCPv6 Rapid Commit Support

Deleting DHCP Local Server and DHCP Relay Override Settings

Configuring Extended DHCP Local Server Dynamic Client Reconfiguration

Configuring Dynamic Reconfiguration Attempts for DHCP Clients

Configuring Deletion of the Client When Dynamic Reconfiguration Fails

Configuring Reconfiguration of the Client on Receipt of RADIUS-Initiated Disconnect

Configuring a Token for DHCP Local Server Authentication

Preventing Binding of Clients That Do Not Support Reconfigure Messages

Requesting DHCP Local Server to Initiate Reconfiguration of Client Bindings

Configuring Detection of DHCP Local Server Client Connectivity

Attaching Dynamic Profiles to DHCP Subscriber Interfaces or DHCP Client Interfaces

Configuring DHCP Snooped Packets Forwarding Support for DHCP Local Server

Configuring Passwords for Usernames

Creating Unique Usernames for DHCP Clients

Configuring How the Extended DHCP Local Server Determines Which Address-Assignment Pool to Use

Configuration Tasks for DHCP Relay Agent
Using External AAA Authentication Services with DHCP Configuring DHCP Duplicate Client Support Grouping Interfaces with Common DHCP Configurations Guidelines for Configuring Interface Ranges Overriding the Default DHCP Relay Configuration Settings Overwriting giaddr Information Replacing the DHCP Relay Request and Release Packet Source Address Overriding Option 82 Information Using Layer 2 Unicast Transmission for DHCP Packets Trusting Option 82 Information Disabling ARP Table Population Specifying the Maximum Number of DHCP Clients Per Interface Automatically Logging Out DHCP Clients DHCP Relay Agent Option 82 Value for Auto Logout Configuring DHCP Snooping for DHCP Relay Agent Enabling and Disabling DHCP Snooped Packets Support for DHCP Relay Agent Configuring DHCP Snooped Packets Forwarding Support for DHCP Relay Agent Sending Release Messages When Clients Are Deleted Disabling Automatic Binding of Stray DHCP Requests Enabling and Disabling Insertion of Option 82 Information Configuring Server Groups Configuring Active Server Groups Enabling DHCP Relay Proxy Mode Attaching Dynamic Profiles to DHCP Subscriber Interfaces or DHCP Client Interfaces Inserting DHCPv6 Interface-ID Option (Option 18) In DHCPv6 Packets DHCP Liveness Detection Overview Configuring Detection of DHCP Relay or DHCP Relay Proxy Client Connectivity Disabling DHCP Relay

Configuration Tasks for DHCP Relay Agent

Using External AAA Authentication Services with DHCP

Configuring DHCP Duplicate Client Support

Grouping Interfaces with Common DHCP Configurations

Guidelines for Configuring Interface Ranges

Overriding the Default DHCP Relay Configuration Settings

Overwriting giaddr Information

Replacing the DHCP Relay Request and Release Packet Source Address

Overriding Option 82 Information

Using Layer 2 Unicast Transmission for DHCP Packets

Trusting Option 82 Information

Disabling ARP Table Population

Specifying the Maximum Number of DHCP Clients Per Interface

Automatically Logging Out DHCP Clients

DHCP Relay Agent Option 82 Value for Auto Logout

Configuring DHCP Snooping for DHCP Relay Agent

Enabling and Disabling DHCP Snooped Packets Support for DHCP Relay Agent

Configuring DHCP Snooped Packets Forwarding Support for DHCP Relay Agent

Sending Release Messages When Clients Are Deleted

Disabling Automatic Binding of Stray DHCP Requests

Enabling and Disabling Insertion of Option 82 Information

Configuring Server Groups

Configuring Active Server Groups

Enabling DHCP Relay Proxy Mode

Attaching Dynamic Profiles to DHCP Subscriber Interfaces or DHCP Client Interfaces

Inserting DHCPv6 Interface-ID Option (Option 18) In DHCPv6 Packets

DHCP Liveness Detection Overview

Configuring Detection of DHCP Relay or DHCP Relay Proxy Client Connectivity

Disabling DHCP Relay

DHCP Local Server Configuration Statements
[edit system] Hierarchy Level attempts authentication bfd circuit-type clear-on-abort client-discover-match client-id delegated-pool delimiter detection-time dhcp-local-server dhcpv6 domain-name duplicate-clients-on-interface dynamic-profile external-authority failure-action forward-snooped-clients group holddown-interval interface interface-client-limit interface-delete interface-name ip-address-first liveness-detection logical-system-name mac-address method minimum-interval minimum-receive-interval multiplier no-adaptation no-arp option-60 option-82 (DHCP Local Server Authentication) option-82 (DHCP Local Server Pool Matching) overrides password pool pool-match-order process-inform radius-disconnect rapid-commit reconfigure relay-agent-interface-id relay-agent-remote-id routing-instance-name service-profile session-mode strict threshold (detection-time) threshold (transmit-interval) timeout token transmit-interval trigger use-primary user-prefix username-include version

DHCP Local Server Configuration Statements

[edit system] Hierarchy Level

client-discover-match

duplicate-clients-on-interface

dynamic-profile

external-authority

failure-action

forward-snooped-clients

group

holddown-interval

interface

interface-client-limit

minimum-receive-interval

option-82 (DHCP Local Server Authentication)

option-82 (DHCP Local Server Pool Matching)

relay-agent-interface-id

relay-agent-remote-id

routing-instance-name

service-profile

session-mode

strict

threshold (detection-time)

threshold (transmit-interval)

DHCP Relay Agent Configuration Statements
[edit forwarding-options dhcp-relay] Hierarchy Level access access-internal active-server-group allow-snooped-clients always-write-giaddr always-write-option-82 authentication bfd circuit-id circuit-type client-discover-match client-id delimiter detection-time dhcp-relay dhcpv6 disable-relay domain-name drop duplicate-clients-on-interface dynamic-profile failure-action forward-snooped-clients group holddown-interval interface interface-client-limit interface-delete interface-name layer2-unicast-replies liveness-detection local-server-group logical-system-name mac-address (DHCP Relay Agent) method minimum-interval minimum-receive-interval multiplier next-hop no-adaptation no-allow-snooped-clients no-bind-on-request no-arp option-60 option-82 option-number overrides password preference prefix proxy-mode relay-agent-interface-id (DHCPv6 Relay Agent) relay-agent-remote-id relay-option relay-option-82 relay-server-group replace-ip-source-with routing-instance-name send-release-on-delete server-group service-profile session-mode threshold (detection-time) threshold (transmit-interval) transmit-interval trust-option-82 use-interface-description use-primary user-prefix username-include version

DHCP Relay Agent Configuration Statements

[edit forwarding-options dhcp-relay] Hierarchy Level

access

access-internal

active-server-group

allow-snooped-clients

always-write-giaddr

always-write-option-82

client-discover-match

duplicate-clients-on-interface

dynamic-profile

failure-action

forward-snooped-clients

group

holddown-interval

interface

interface-client-limit

interface-delete

interface-name

layer2-unicast-replies

liveness-detection

local-server-group

logical-system-name

mac-address (DHCP Relay Agent)

method

minimum-interval

minimum-receive-interval

multiplier

next-hop

no-adaptation

no-allow-snooped-clients

relay-agent-interface-id (DHCPv6 Relay Agent)

relay-agent-remote-id

relay-option

relay-option-82

relay-server-group

replace-ip-source-with

routing-instance-name

send-release-on-delete

server-group

service-profile

session-mode

threshold (detection-time)

threshold (transmit-interval)

transmit-interval

trust-option-82

use-interface-description

Verifying and Managing DHCP Local Server Configurations
Verifying and Managing DHCP Local Server Configuration Verifying and Managing DHCPv6 Local Server Configuration

Verifying and Managing DHCP Local Server Configurations

Verifying and Managing DHCP Local Server Configuration

Verifying and Managing DHCPv6 Local Server Configuration

Verifying and Managing DHCP Relay Agent Configurations
Verifying and Managing DHCP Relay Configuration Verifying and Managing DHCPv6 Relay Configuration

Verifying and Managing DHCP Relay Agent Configurations

Verifying and Managing DHCP Relay Configuration

Verifying and Managing DHCPv6 Relay Configuration

DHCP Local Server Monitoring Commands
clear dhcp server binding clear dhcp server statistics clear dhcpv6 server binding clear dhcpv6 server statistics request dhcp server reconfigure request dhcpv6 server reconfigure request system reboot show dhcp server binding show dhcp server statistics show dhcpv6 server binding show dhcpv6 server statistics

DHCP Local Server Monitoring Commands

clear dhcp server binding

clear dhcp server statistics

clear dhcpv6 server binding

clear dhcpv6 server statistics

request dhcp server reconfigure

request dhcpv6 server reconfigure

request system reboot

show dhcp server binding

show dhcp server statistics

show dhcpv6 server binding

show dhcpv6 server statistics

DHCP Relay Agent Monitoring Commands
clear dhcp relay binding clear dhcp relay statistics clear dhcpv6 relay binding clear dhcpv6 relay statistics show dhcp relay binding show dhcp relay statistics show dhcpv6 relay binding show dhcpv6 relay statistics show route extensive show route protocol

DHCP Relay Agent Monitoring Commands

clear dhcp relay binding

clear dhcp relay statistics

clear dhcpv6 relay binding

clear dhcpv6 relay statistics

show dhcp relay binding

show dhcp relay statistics

show dhcpv6 relay binding

show dhcpv6 relay statistics

show route extensive

show route protocol