ZyXEL Communications Prestige 662HW Series, User Manual

Page: 267 / 458

Prestige 662HW Series User’s Guide
Internet Access 27-1
Chapter 27
Internet Access
This chapter shows you how to configure the LAN and WAN of your Prestige for Internet
access
.
27.1 Internet Access Overview
Refer to the chapters on the web configurator’s wizard, LAN and WAN screens for more background
information on fields in the SMT screens covered in this chapter.
27.2 IP Policies
Traditionally, routing is based on the destination address only and the router takes the shortest path to
forward a packet. IP Policy Routing (IPPR) provides a mechanism to override the default routing
behavior and alter the packet forwarding based on the policy defined by the network administrator.
Policy-based routing is applied to incoming packets on a per interface basis, prior to the normal
routing. Create policies using SMT menu 25 (see
IP Policy Routing ) and apply them on the Prestige
LAN and/or WAN interfaces using menus 3.2 (LAN) and 11.3 (WAN).
27.3 IP Alias
IP alias allows you to partition a physical network into different logical networks over the same
Ethernet interface. The Prestige supports three logical LAN interfaces via its single physical Ethernet
interface with the Prestige itself as the gateway for each LAN network.
When you use IP alias, you can also configure firewall rules to control access between the LAN's
logical networks (subnets).
Make sure that the subnets of the logical networks do not overlap.
The following figure shows a LAN divided into subnets A, B, and C.
Figure 27-1 Physical Network Figure 27-2 Partitioned Logical
Networks
Use menu 3.2.1 to configure IP Alias on your Prestige.