Chapter 7; Bridging Setup; Bridging In General; Bridge Ethernet Setup - ZyXEL Communications Prestige 642 User Manual

7.1

Bridging in General

Bridging bases the forwarding decision on the MAC (Media Access Control), or hardware address, while
routing does it on the network layer (IP or IPX) address. Bridging allows the Prestige 642 to transport
packets of network layer protocols that the Prestige 642 does not route, e.g., SNA, from one network to
another. The caveat is that, compared to routing, bridging generates more traffic for the same network layer
protocol and it also demands more CPU cycles and memory.
For efficiency reasons, do not turn on bridging unless you need to support protocols other than IP and IPX
on your network. For IP and IPX, enable the respective routing if you need it; do not bridge what the
Prestige 642 can route.
7.2

Bridge Ethernet Setup

Basically, all non-local packets are bridged to the WAN; however, your Prestige 642 applies special
handling for certain IPX packets to reduce the number of calls, depending on the setting of the Handle IPX
field.

Bridging Setup

Prestige 642 ADSL Internet Access Router
Bridging Setup
This chapter shows you how to configure the
bridging parameters of your Prestige.

Chapter 7

7-1