ATL Telecom AM2 - Manual (Page 24)

ATL User Guide
AM2 G.SHDSL Modem 24
6.4 ROUTING
Various Internet protocols are available i.e. DHCP server, DHCP client, DHCP relay, point-to-point over ATM,
Ethernet and IP over ATM and Ethernet over ATM. Prior to setting up the AM2 as a router you must ensure
which protocol is provided by the ISP.
6.4.1 DHCP SERVER
Dynamic Host Configuration Protocol (DHCP) is a communication protocol that lets network administrators to
manage centrally and automate the assignment of Internet Protocol (IP) addresses in an organization's
network. Using the Internet Protocol, each machine that can connect to the Internet needs a unique IP
address. When an organization sets up its computer users with a connection to the Internet, an IP address
must be assigned to each machine.
Without DHCP, the IP address must be entered manually at each computer. If computers move to another
location in another part of the network, a new IP address must be entered. DHCP lets a network administrator
supervise and distribute IP addresses from a central point and automatically sends a new IP address when a
computer is plugged into a different place in the network. If the DHCP server is Enabled, you have to setup
the following parameters for processing it as DHCP server.
The embedded DHCP server assigns network configuration information to most of the 253 users accessing
the Internet in the same time.
6.4.2 DHCP CLIENT
Some ISPs provide a DHCP server service by which the LAN can access IP information automatically. To setup
the DHCP client mode, follow the procedure.
6.4.3 DCHCP RELAY
If you have a DHCP server in your LAN and you want to use it for DHCP services, the product provides DHCP
relay function to meet your needs.
6.4.4 PPPoA & PPPoE
PPPoA (point-to-point protocol over ATM) and PPPoE (point-to-point protocol over Ethernet) are
authentication and connection protocols used by many service providers for broadband Internet access. These
are specifications for connecting multiple computer users on an Ethernet local area network to a remote site
through common customer premises equipment, which is the telephone company's term for a modem and
similar devices. PPPoE and PPPoA can be used to office or building. Users share a common Digital Subscriber
Line (DSL), cable modem, or wireless connection to the Internet. PPPoE and PPPoA combine the Point-to-Point
Protocol (PPP), commonly used in dialup connections, with the Ethernet protocol or ATM protocol, which
supports multiple users in a local area network. The PPP protocol information is encapsulated within an
Ethernet frame or ATM frame.