Extended Dhcp Relay Agent Overview - Juniper EX3400 Features Manual

DHCP and Other System Services Feature Guide for EX2300, EX3400, and EX4300 Switches

Extended DHCP Relay Agent Overview

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You can configure extended DHCP relay options on the router or on the switch and enable
the router (or switch) to function as a DHCP relay agent. A DHCP relay agent forwards
DHCP request and reply packets between a DHCP client and a DHCP server.
DHCP relay supports the attachment of dynamic profiles and also interacts with the local
AAA Service Framework to use back-end authentication servers, such as RADIUS, to
provide subscriber authentication or DHCP client authentication. You can attach dynamic
profiles and configure authentication support on a global basis or for a specific group of
interfaces.
NOTE: The PTX Series Packet Transport Routers do not support
authentication for DHCP relay agents.
On the routers, you can use DHCP relay in carrier edge applications such as video/IPTV
to obtain configuration parameters, including an IP address, for your subscribers.
On the switches, you can use DHCP relay to obtain configuration parameters including
an IP address for DHCP clients.
NOTE: The extended DHCP relay agent options configured with the
statement are incompatible with the DHCP/BOOTP relay agent options
configured with the
extended DHCP relay agent and the DHCP/BOOTP relay agent on the router
at the same time.
For information about the DHCP/BOOTP relay agent, see Configuring Routers,
Switches, and Interfaces as DHCP and BOOTP Relay Agents.
You can also configure the extended DHCP relay agent to support IPv6 clients.
See"DHCPv6 Relay Agent Overview" on page 85
agent feature.
To configure the extended DHCP relay agent on the router (or switch), include the
dhcp-relay statement at the
You can also include the
dhcp-relay
[edit logical-systems logical-system-name forwarding-options]
[edit logical-systems logical-system-name routing-instances routing-instance-name
forwarding-options]
[edit routing-instances routing-instance-name forwarding-options]
This overview covers:
statement. As a result, you cannot enable both the
bootp
for information about the DHCPv6 relay
[edit forwarding-options] hierarchy level.
statement at the following hierarchy levels:
dhcp-relay
Copyright © 2017, Juniper Networks, Inc.