CCNA 新版（英文）D20S08L01.pps

© 2002, Cisco Systems, Inc. All rights reserved.
Establishing Frame Relay Connections
Module 8
Objectives
pleting this module, you will be able to:
Use Cisco mands to configure an operational serial Frame Relay connection and Frame Relay subinterfaces, given a functioning router
Use mands to identify anomalies in an operational serial Frame Relay connection and Frame Relay subinterfaces, given a functioning router
Use mands to identify events and anomalies in an operational serial Frame Relay connection and Frame Relay subinterfaces, given a functioning router and an operational serial Frame Relay connection
© 2002, Cisco Systems, Inc. All rights reserved.
4
Frame Relay Overview
Objectives
pleting this lesson, you will be able to:
Describe the features and operation of a Frame work
Define important Frame Relay terms including local access rate, virtual circuit, PVC, SVC, DLCI, CIR, InARP, LMI, , and
Frame Relay Overview
Connections made by virtual circuits
Connection-oriented service
Frame Relay Stack
OSI Reference Model
Frame Relay
Physical
Presentation
Session
Transport
Network
Data-Link
Application
EIA/TIA-232, EIA/TIA-449, , , EIA/TIA-530
Frame Relay
IP/IPX/AppleTalk, etc.
Frame Relay Terminology
Frame Relay default: nonbroadcast, ess (NBMA)
Selecting a Frame Relay Topology
Reachability Issues with Routing Updates
Problem:
Broadcast traffic must be replicated for each active connection.
Split-horizon rule prevents routing updates received onone interface from being forwarded out the same interface.