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CHAPTER 17
DHCP Overview
DHCP Overview Information
Copyright © 2010, Juniper Networks, Inc.
The Dynamic Host Configuration Protocol (DHCP) provides a mechanism through which
computers using Transmission Control Protocol/IP (TCP/IP) can obtain protocol
configuration parameters automatically from a DHCP server on the network.
The following sections provide overview information for the E Series router DHCP support:
DHCP Overview Information on page 449
DHCP Platform Considerations on page 450
DHCP References on page 451
Configuring the DHCP Access Model on page 451
Configuring DHCP Proxy Clients on page 451
Logging DHCP Packet Information on page 453
Viewing and Deleting DHCP Client Bindings on page 453
The most important configuration parameter carried by DHCP is the IP address. A
computer must be initially assigned a specific IP address that is appropriate to the network
to which the computer is attached and that is not assigned to any other computer on
that network. If you move a computer to a new network, it must be assigned a new IP
address for that new network. You can use DHCP to manage these assignments
automatically.
An IP client contacts a DHCP server for configuration parameters. The DHCP server is
typically centrally located and operated by the network administrator. Because the server
is run by a network administrator, DHCP clients can be reliably and dynamically configured
with parameters appropriate to the current network architecture.
You can configure the E Series router to support the following DHCP features:
DHCP access model
DHCP proxy client
DHCP relay
DHCP relay proxy
449
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