Chapter 8: Dhcp Relay; Feature Overview; Functionality; Bootp Requests - Avaya 1000 Series Configuration Manual

Chapter 8: DHCP Relay

This application describes the functionality of the DHCP relay feature and includes CLI command
examples.

Feature Overview

The DHCP relay feature eliminates the need for a DHCP server on every LAN, because DHCP
requests can be relayed up to 4 DHCP servers on each ethernet interface including
subinterfaces. Avaya 's implementation of DHCP relay is based on RFC 1532. BOOTP/
DHCP messages are relayed (vs. forwarded) between the server and client.
Figure 2: DHCP Relay Overview

Functionality

The DHCP relay feature uses BOOTP requests and replies to negotiate packet delivery
between the DHCP client and server.

BOOTP Requests

BOOTP requests are messages from client to server. Request messages include DHCP
DISCOVER, DHCP REQUEST, DHCP RELEASE, etc. The relay agent modifies the packet
Avaya Secure Router 1000 Series Configuration Guide December 2010 41