Motorola 68338 User Guide - Page 10

LAN Forwarding Options, Introduction, Bridging, Routing, Bridge Routing

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IP and LAN Protocol Support LAN Forwarding Options Introduction The Vanguard products supports three forwarding options for carry traffic and interconnecting LANs. The Vanguard can act as a: • Bridge • Router • Bridge Router (BRouter) Bridging Bridges work at the Data Link layer providing connectionless service. Vanguard products support bridging of data traffic for Token Ring and Ethernet LANs. Bridging LAN traffic minimizes your networking costs by eliminating the need for redundant networks and maximizes the availability of dedicated facilities such as servers and printers, as well as public Frame Relay and X.25 services, across multiple LANs. The Vanguard supports these types of bridging • Translational Bridging • Source Route Bridging for Token Ring • Transparent Bridging Routing Router interconnect network segments and transport data across an network from a source to a destination. Routers store and forward data in an network regardless of network topology. Routers operate at the Network layer and, therefore, offer some flexibility in choosing several network level services. Bridge Routing When configured as a bridging router, the Vanguard supports both bridging and routing within the same node concurrently. The Vanguard provide bridging router functions including • Routing packets if a specific routing protocol is globally enabled. • Filtering packets if you configure specific protocol filters. • Bridging packets if they are not routed or filtered. In this case, they are forwarded according to their destination MAC address. 1-4 Introduction to Vanguard IP and LAN Feature Protocols

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1-4
Introduction to Vanguard IP and LAN Feature Protocols
IP and LAN Protocol Support
LAN Forwarding Options
Introduction
The Vanguard products supports three forwarding options for carry traffic and
interconnecting LANs. The Vanguard can act as a:
•
Bridge
•
Router
•
Bridge Router (BRouter)
Bridging
Bridges work at the Data Link layer providing connectionless service. Vanguard
products support bridging of data traffic for Token Ring and Ethernet LANs.
Bridging LAN traffic minimizes your networking costs by eliminating the need for
redundant networks and maximizes the availability of dedicated facilities such as
servers and printers, as well as public Frame Relay and X.25 services, across
multiple LANs. The Vanguard supports these types of bridging
•
Translational Bridging
•
Source Route Bridging for Token Ring
•
Transparent Bridging
Routing
Router interconnect network segments and transport data across an network from a
source to a destination. Routers store and forward data in an network regardless of
network topology. Routers operate at the Network layer and, therefore, offer some
flexibility in choosing several network level services.
Bridge Routing
When configured as a bridging router, the Vanguard supports both bridging and
routing within the same node concurrently. The Vanguard provide bridging router
functions including
•
Routing packets if a specific routing protocol is globally enabled.
•
Filtering packets if you configure specific protocol filters.
•
Bridging packets if they are not routed or filtered. In this case, they are
forwarded according to their destination MAC address.