Dhcp Client Overview; Dhcp Client Applications - Avaya G250 Administration

Configuring Ethernet ports

DHCP client overview

DHCP (Dynamic Host Configuration Protocol) provides a mechanism for allocating IP
addresses dynamically so that addresses can be reused when hosts no longer need them.
DHCP is a client-server protocol. The DHCP server controls IP address allocation and network
configuration. The DHCP server grants the DHCP client an IP address for a fixed amount of
time, called the lease. After the lease expires, the client is required to stop using the IP address.
The client periodically sends requests to the server to renew or extend the lease.
In addition to receiving an IP address, a G250/G350 DHCP client can optionally request to
receive a domain name, a list of default routers, and a list of available DNS servers.
Note:
The Avaya G250/G350 Media Gateway can function as both a DHCP server and
Note:
a DHCP client simultaneously. That is, you can connect a cable modem for an
Internet connection to the WAN fast Ethernet in order to use the G250/G350 as a
DHCP client. At the same time, you can activate the DHCP server on the G250/
G350 for use by clients such as IP phones and PCs connected to the LAN ports.
The DHCP server on the G250/G350 does not serve Internet devices connected
over the WAN Fast Ethernet port.
For information on configuring the G250/G350 as a DHCP server, see
Configuring DHCP server

DHCP client applications

The main application for DHCP client is to enable dynamic IP addressing, thereby enabling a
broadband Internet connection via cable modem.
Figure 10: Fixed connection to broadband Internet using G250/G350 as DHCP client
96 Administration for the Avaya G250 and Avaya G350 Media Gateways
G250G350
WAN Fast Ethernet
Interface
on page 333.
Cable Modem
Internet
DHCP Server