... advertised again unless they are unavailable.This saves bandwidth on the serial link between routers R1 and R2, therebysaving bandwidth for end users to use to send data.12○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○Chapter ... using a tunnel interface. This can help reduce IPX WAN-based traffic and provide more bandwidth for user data based traffic.IPX and Access ListsIn the first portion of this chapter, we discussed ... Serial2, zone WANThe router ID, which is identified by the command appletalk routingeigrp <router ID& gt;, must be unique to each router. If two routers usethe same router ID, Cisco IOS will not...