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xviii
Single-Protocol IP Backbone
310
Multiprotocol Backbone
310
When to Tunnel IP in IP
310
Foundation Summary
312
Quality of Service Commands
312
Q&A
317
Scenarios
322
Scenario 1
322
Scenario 2
322
Answer to Scenario 1
323
Answer to Scenario 2
323
Chapter 10
X.25/Frame Relay Topologies
327
How to Best Use This Chapter
327
"Do I Know This Already?" Quiz
328
Foundation Topics
332
X.25
332
WAN Data Links
339
Multiple SVCs
341
Static Routing
342
X.25 and Subinterfaces
342
X.25 Packet Switch
342
X.25 Over ISDN
343
X.25 Design Tips
344
Why Frame Relay?
345
Local Loop
347
Frame Relay Access Devices (FRADs)
348
DLCI
348
Frame Relay Service Characteristics
350
Frame Relay Configuration Parameters
351
Frame Relay Operation: LMI
356
RFC 1490
357
Frame Relay Mapping
357
Inverse ARP
358
Interaction with Routing Protocols
358
Subinterfaces
359
Design Options
360
Star topology
361
87200333.book Page xviii Wednesday, August 22, 2001 2:18 PM