User Guide

CHAPTER

Configuring DHCP Relay, DHCP Server, and PAT 5-1

Configuring DHCP Relay,

DHCP Server, and PAT

Cisco 700 series routers can perform the role of the relay agent, relaying IP configuration

information request packets from the LAN interface, over the ISDN interface, to a specified

Dynamic Host Configuration Protocol (DHCP) server. Cisco 700 series routers provide

DHCP relay, DHCP server, Port Address Translation (PAT), and Internet Protocol Control

Protocol (IPCP).

This chapter provides descriptions, application notes, and example configurations for

configuring Dynamic Host Configuration Protocol (DHCP) relay, DHCP server, and Port

Address Translation (PAT) on the Cisco 700 series router. It contains the following

sections:

• DHCP Description

• PAT Description

• IPCP Description

• PPP IPCP Negotiation Example

• DHCP Relay with IPCP Negotiation Example

• DHCP Server with IPCP Negotiation Example

• PAT with IPCP Single-Destination Negotiation Example

• DHCP Server and PAT with IPCP Single-Destination Negotiation Example

• DHCP Server with PAT and IPCP Dual-Destination PPP Negotiation Example