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Using Enterprise Edge Services 37

P0910464 Issue 01 Enterprise Edge Networking Operations Guide

LAN Connections

The Enterprise Edge Ethernet / 802.3 interface supports IEEE 802.3 Ethernet frame

format. The Ethernet interface uses Carrier Sense Multiple Access with Collision

Detection (CSMA/CD) to manage the access to the physical media.

Enterprise Edge Ethernet interface supports the following features:

• 100 BASE – TX with RJ-45 connector

• 10 / 100 Auto Sense

• Full Duplex support

• Fast LAN-LAN routing

WAN Connections

This section includes information on:

• WAN overview

• Permanent WAN connections:

– Frame Relay

– PPP

WAN overview

A WAN (wide area network) is a geographically dispersed data communication

network. The term WAN distinguishes a broader data communication structure

from a local area network (LAN). A WAN can be privately owned or rented, but

usually connotes the inclusion of public (shared user) networks.

Enterprise Edge includes two primary WAN links (WAN1, WAN2) and a backup

WAN dial up link (WAN3).

• The Primary WAN link is always a permanent link and it is a dedicated network

adapter. The primary link runs either Frame Relay or the PPP protocol at the

link layer.

The Enterprise Edge primary WAN connection is through a two-port card.

These two ports can be independently configured to run Frame Relay or PPP.

The card includes one serial sync port and one T1 port.

• The backup WAN link is always configured as dial-on-demand network adapter

by the router. The backup Wan link runs PPP only. Enterprise Edge provides

backup WAN connection through a V.90 modem.

The primary and backup link management is performed from Enterprise Edge.

There is a Net Link Manager running in Enterprise Edge that monitors the

primary link status and it starts the backup link when a break in primary link is

detected. Similarly, the backup link is automatically terminated when the

primary link becomes active.

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Avaya EE Networking Guida Utente Pagina 37