Bcran: Building Cisco Remote Access Networks : Course Companion

by Thomas, Thomas M., II; Quiggle, Adam

• ISBN13: 9780072124804
• ISBN10: 0072124806
• Format: Hardcover
• Copyright: 2000-09-01
• Publisher: McGraw-Hill

Summary

The remote access exam is one of the four exams that CCNP candidates need to pass to get certified. This curriculum-driven book features FAQ sections for each chapter that will aid in troubleshooting problem areas on the job. The CD-ROM provides hands-on experience and includes Cisco router utilities and network sniffers so students can load configurations on a router. 200 illus.

Table of Contents

Acknowledgments	xxvii
About the Authors	xxix
About the Reviewers	xxxi
Introduction	1	(18)
Chapter Introduction	2	(1)
Who Should Read This Book	3	(1)
Concepts Required Before Reading This Book	3	(1)
Certified Cisco Network Professional (CCNP) Candidates	4	(1)
CCIE Candidates	4	(1)
Network Professionals Supporting Remote Access Networks	5	(1)
Lab Equipment for Case Studies	5	(1)
Overview	6	(1)
Cisco Routers	6	(1)
PCs	7	(1)
ISDN	7	(2)
Where Can I Purchase Equipment for My Home Lab?	9	(1)
Building Cisco Remote Access Networks Exam	9	(1)
Material on the Building Cisco Remote Access Networks Exam	9	(2)
Material Not on the Building Cisco Remote Access Networks Exam	11	(1)
Overview of Chapters	11	(6)
Identifying Cisco Products for Remote Connections	12	(1)
Assembling the WAN Components	12	(1)
Configuring Central Sites for Asynchronous Communications	12	(1)
Configuring Central Sites to Use PPP	13	(1)
Connecting Windows to Access Central Sites	13	(1)
Enhancing Remote Connectivity with ISDN	13	(1)
Using Dial on Demand Routing (DDR) to Enhance Remote Connectivity	14	(1)
Enhanced Dial on Demand Routing	14	(1)
Configuring a Cisco 700 Series Router	14	(1)
X.25	14	(1)
Frame Relay	15	(1)
Using ISDN to Back Up Permanent WAN Connections	15	(1)
Managing Network Performance with Queuing	15	(1)
Optimizing Network Performance with Data Compression	15	(1)
Scaling IP Addresses with NAT and PAT	16	(1)
Scaling Remote Access with AAA	16	(1)
Virtual Private Dialup Networks	16	(1)
Additional Support Forums	17	(2)
Identifying Cisco Products for Remote Connections	19	(34)
Chapter Introduction	20	(1)
Objectives Covered in this Chapter	20	(1)
Overview of Remote Access	20	(1)
LAN Versus WAN	21	(1)
Connection Requirements versus Costs	21	(1)
Overview of WAN Connection Types	21	(10)
Dedicated Connections	22	(2)
Circuit-Switched Connections	24	(1)
Plain Old Telephone Service (POTS)	24	(2)
Types of ISDN Connections	26	(2)
ISDN BRI	28	(1)
ISDN PRI (T1/E1)	29	(1)
Packet-Switched Connections	29	(1)
X.25	30	(1)
Frame Relay	30	(1)
Overview of WAN Encapsulation Protocols	31	(2)
High-Level Data Link Control (HDLC)	31	(1)
Serial Line Internet Protocol (SLIP)	31	(1)
Point-to-Point Protocol (PPP)	31	(1)
X.25	32	(1)
Frame Relay	32	(1)
WAN Considerations	33	(2)
Bandwidth Required	33	(1)
Availability of Service	33	(1)
Cost of Service	33	(1)
Manageability	34	(1)
Anticipated Traffic	34	(1)
Reliability and Quality of Service (QoS)	34	(1)
Accessibility	34	(1)
Site Considerations	35	(4)
Central Site	35	(1)
Remote Site	36	(2)
Telecommuter	38	(1)
Product Selection	39	(1)
Appropriate Interface Selection	39	(1)
Low-End Products	40	(1)
The Cisco 700 Series Router	40	(1)
The Cisco 800 Series Router	40	(1)
The Cisco 1000 Series Router	40	(1)
Mid-Range Products	41	(1)
The Cisco 1600 Series Router	41	(1)
The Cisco 1700 Series Router	41	(1)
The Cisco 2500 Series Router	41	(1)
The Cisco 2600 Series Router	41	(1)
High-End Products	42	(1)
The Cisco 3600 Series Router	42	(1)
The Cisco 4500 and 4700 Series Routers	42	(1)
The Cisco AS5x00 Series Router	42	(1)
The Cisco 7100, 7200, and 7500 Series Routers	42	(1)
Summary of Product Selection	43	(1)
Easing Product Selection with the Online Tool Selection Web Page	43	(2)
Chapter Summary	45	(1)
Frequently Asked Questions (FAQ)	45	(1)
Case Study	46	(2)
Objective	46	(1)
Scenario	46	(1)
Approach	47	(1)
Central Site Product Selection	47	(1)
Remote Site Product Selection	47	(1)
Telecommuter Product Selection	48	(1)
Case Study Summary	48	(1)
Questions	48	(3)
Answers	51	(2)
Assembling and Cabling the WAN Components	53	(32)
Chapter Introduction	54	(1)
Objectives Covered in this Chapter	54	(1)
Identifying Equipment Components	55	(10)
Central Site Equipment	55	(4)
Remote Site Equipment	59	(4)
Telecommuter Office Equipment	63	(2)
Assembling the Network and Verifying Installation	65	(5)
T1, T3, Frame Relay, or X.25 (Synchronous Communications)	65	(1)
ISDN PRI (North America)	66	(1)
ISDN PRI (Europe)	67	(1)
ISDN BRI	68	(1)
Asynchronous Connections	69	(1)
Verifying the Installation of Equipment	70	(6)
Central Site Equipment	70	(4)
Branch Office Equipment	74	(1)
Telecommuter/SOHO Equipment	75	(1)
Chapter Summary	76	(1)
Frequently Asked Questions	76	(2)
Case Study	78	(2)
Objective	78	(1)
Scenario	78	(1)
Approach	78	(1)
The Results of Verifying the Connectivity of Regional Office Equipment	79	(1)
The Results of Verifying the Connectivity of Remote Site Equipment	79	(1)
The Results of Verifying the Connectivity of Telecommuter Equipment	80	(1)
Questions	80	(3)
Answers	83	(2)
Configuring Central Sites for Asynchronous Communications	85	(46)
Chapter Introduction	86	(1)
Objectives Covered in this Chapter	86	(1)
Overview of Modem Operations	86	(2)
The Modem's Function	86	(1)
Analog Communication versus Asynchronous Communication	87	(1)
Modem Cables, Signaling, and Wiring	88	(3)
Cables and Signaling	88	(1)
EIA/TIA-232	88	(2)
DTE to DTE Wiring	90	(1)
Telco Infrastructure	91	(2)
Pulse Code Modulation	91	(2)
Framing	93	(1)
Modem Modulation Methods	93	(4)
ITU-T Standards	93	(1)
56K Technology	94	(2)
Proprietary Modulation Methods	96	(1)
Error Correction and Data Compression	97	(2)
Error Detection and Correction Methods	97	(1)
Data Compression Methods	97	(1)
UART	98	(1)
Configuring Asynchronous Connections	99	(17)
Line Types and Numbering	99	(5)
Connecting to an Asynchronous Device (Modem)	104	(3)
Line Configuration	107	(2)
AT Commands and Initialization Strings	109	(2)
Modem Auto-Configuration	111	(1)
Creating New Modemcap Database Entries	112	(3)
Configuring Modems Attached to Cisco Access Servers	115	(1)
Modem Auto-Discovery	115	(1)
Chat Scripts	116	(1)
Verifying and Troubleshooting Modem Configuration	116	(2)
Chapter Summary	118	(1)
Frequently Asked Questions (FAQ)	118	(1)
Case Study	119	(6)
Objective	119	(1)
Required Equipment	119	(1)
Scenario	120	(1)
Required Information	120	(1)
Approach	121	(1)
Configure Router A	121	(3)
Dial in to the AUX Port on Router A	124	(1)
Case Study Summary	124	(1)
Questions	125	(3)
Answers	128	(3)
Configuring Central Sites to Use PPP	131	(44)
Chapter Introduction	132	(1)
Objectives Covered in this Chapter	132	(1)
Overview of Dialup Protocols	132	(3)
Serial Line Internet Protocol (SLIP)	132	(1)
AppleTalk Remote Access Protocol (ARAP)	133	(1)
Point to Point Protocol (PPP)	134	(1)
PPP Components and Configuration	135	(15)
HDLC	135	(4)
LCP	139	(11)
Network Control Protocol	150	(1)
Configuring PPP on Cisco Routers	150	(8)
Configuring TCP/IP for Connections to the Central Office	150	(4)
Configuring IPX/SPX for Connections to the Central Office	154	(3)
Configuring NetBEUI for Connections to the Central Office	157	(1)
Fine-Tuning Your PPP Configuration	158	(1)
Cisco Discovery Protocol	158	(1)
SAP and RIP Updates	158	(1)
Troubleshooting PPP Connections	159	(3)
Chapter Summary	162	(1)
Frequently Asked Questions (FAQ)	163	(1)
Case Study	163	(7)
Objective	163	(1)
Required Equipment	164	(1)
Scenario	164	(1)
Required Information	165	(1)
Approach	165	(1)
Connect the Equipment	165	(1)
Configure Router A	166	(3)
Case Study Summary	169	(1)
Questions	170	(3)
Answers	173	(2)
Connecting Windows to Access Central Sites	175	(32)
Chapter Introduction	176	(1)
Objectives Covered in this Chapter	176	(1)
Overview of Client Side Dialup	176	(3)
Hardware	176	(2)
UART	178	(1)
Port Settings	178	(1)
Windows 95 Dialup Connections	179	(8)
Installing and Configuring Windows 95 Dial-Up Networking	179	(3)
Creating Windows 95 Dialup Scripts	182	(3)
Verifying Windows 95 Dial-Up Networking Connections	185	(1)
Fine-Tuning Windows 95 Dial-Up Networking Connections	185	(2)
Windows NT Remote Access Service	187	(6)
Installing and Configuring RAS	187	(3)
Creating Windows NT Dialup Scripts	190	(1)
Fine-Tuning Windows NT Dialup Scripts	190	(2)
Verifying Windows NT Dialup Connections	192	(1)
Windows 2000 Dialup Connections	193	(4)
Creating Windows 2000 Dialup Scripts	194	(2)
Verifying Windows 2000 Dialup Connections	196	(1)
Chapter Summary	197	(1)
Frequently Asked Questions (FAQ)	198	(1)
Case Study	199	(2)
Objective	199	(1)
Required Equipment	199	(1)
Scenario	199	(1)
Required Information	200	(1)
Approach	200	(1)
Install Dialup Networking	200	(1)
Create a Dialup Script	200	(1)
Fine-Tune the Dialup Script	201	(1)
Case Study Summary	201	(1)
Questions	201	(3)
Answers	204	(3)
Enhancing Remote Connectivity with ISDN	207	(44)
Chapter Introduction	208	(1)
Objectives Covered in this Chapter	208	(1)
Overview of ISDN	208	(16)
Analog Communications versus ISDN Communications	209	(1)
Channelized T1/E1	209	(3)
ISDN BRI	212	(1)
Reference Points	213	(1)
ISDN Protocols	214	(2)
D Channel	216	(1)
Data Link Layer	217	(1)
LAPD Addressing	217	(2)
LAPD Control Field	219	(1)
Network Layer Messages	220	(4)
B Channel	224	(1)
ISDN Call Setup and Teardown	224	(2)
Configuring ISDN PRI	226	(6)
Controller Type (T1/E1)	226	(1)
Framing and Linecoding	226	(2)
Clocking	228	(1)
Switch Type	229	(1)
Timeslot Identification	230	(1)
Robbed-Bit Signaling	230	(1)
Configuration of the D Channel Serial Interface	231	(1)
Analog Call Acceptance	232	(1)
Configuring ISDN BRI	232	(3)
Switch Type	233	(1)
Service Profile Identifier (SPID)	234	(1)
Analog Call Acceptance	234	(1)
Verifying and Troubleshooting ISDN	235	(4)
Show Commands	235	(2)
Debug Commands	237	(2)
Chapter Summary	239	(1)
Frequently Asked Questions (FAQ)	239	(1)
Case Study	240	(5)
Objective	240	(1)
Required Equipment	240	(1)
Scenario	240	(1)
Required Information	241	(1)
Approach	241	(1)
Configure the ISDN PRI	241	(1)
Configure the Asynchronous Lines	242	(2)
Configure the LAN Interface	244	(1)
Configure the Users	244	(1)
Case Study Summary	244	(1)
Questions	245	(3)
Answers	248	(3)
Using Dial on Demand Routing (DDR) to Enhance Remote Connectivity	251	(40)
Chapter Introduction	252	(1)
Objectives Covered in this Chapter	252	(1)
Overview of Dial on Demand Routing	252	(1)
Configuring DDR with ISDN	253	(9)
The dialer-list Command	255	(2)
The dialer-group Command	257	(1)
The dialer-map Command	258	(1)
DDR Summary	259	(1)
Default Route	259	(3)
Optional Configuration Issues with DDR	262	(5)
Authentication	262	(1)
The dialer idle-timeout and dialer fast-idle Commands	262	(3)
The dialer load-threshold Command	265	(1)
Multilink PPP	266	(1)
Considerations in a DDR Environment	267	(6)
Redistributing Static Routes	267	(1)
Spoofing	268	(2)
Snapshot Routing	270	(2)
Rate Adaptation	272	(1)
Verifying and Troubleshooting DDR	273	(3)
Show Commands	273	(2)
Debug Commands	275	(1)
Chapter Summary	276	(1)
Frequently Asked Questions (FAQ)	276	(1)
Case Study	277	(8)
Objective	277	(1)
Required Equipment	277	(1)
Scenario	277	(1)
Required Information	278	(1)
Approach	278	(1)
Configure the Remote Site	279	(2)
Configure the Central Site	281	(2)
Case Study Summary	283	(2)
Questions	285	(4)
Answers	289	(2)
Advanced Dial-on-Demand Routing	291	(48)
Chapter Introduction	292	(1)
Objectives Covered in this Chapter	292	(1)
Overview of Advanced DDR Environments	292	(1)
Dialer Interfaces	293	(2)
Rotary Groups	295	(18)
Physical Interface	296	(2)
Dialer Interface	298	(4)
Dialer Profiles	302	(1)
Hunt Group	303	(3)
Physical Interfaces	306	(3)
Dialer Interface	309	(2)
Dialer Map-Class	311	(2)
Verifying Dialer Profiles and Rotary Groups	313	(2)
Show Commands	313	(2)
Chapter Summary	315	(1)
Frequently Asked Questions (FAQ)	316	(1)
Case Study	317	(12)
Objective	317	(1)
Required Equipment	317	(1)
Scenario	317	(1)
Required Information	317	(2)
Approach	319	(1)
Configure the Central Site	320	(4)
Configure Remote Site A	324	(2)
Configure Remote Site B	326	(1)
Configure Remote Site C	327	(2)
Case Study Summary	329	(4)
Questions	333	(4)
Answers	337	(2)
Configuring a Cisco 700 Series Router	339	(50)
Chapter Introduction	340	(1)
Objectives Covered in this Chapter	340	(1)
Overview of Cisco 700 Series	340	(8)
Hardware Configuration	340	(2)
Network Protocols	342	(1)
Management Features	343	(1)
ISDN Features	343	(2)
Cisco 700 Profile Overview	345	(3)
Configuring a 700 Series Router	348	(17)
Cisco 700 Specific Commands	349	(3)
Configure ISDN Characteristics	352	(1)
Configure Routing and Bridging	352	(2)
Configure IP Characteristics	354	(1)
Configure DHCP	355	(3)
Configure Routing Protocols	358	(1)
Configure IPX Characteristics	359	(1)
Configure IPX Spoofing	360	(1)
Fine-Tune IPX RIP/SAP	361	(2)
Configure Remote Destination Characteristics	363	(2)
Similar Cisco IOS commands	365	(1)
Chapter Summary	365	(2)
Frequently Asked Questions (FAQ)	367	(1)
Case Study	368	(16)
Objective	368	(1)
Required Equipment	368	(1)
Scenario	368	(1)
Required Information	368	(2)
Approach	370	(1)
Configure the Central Site	371	(3)
Configure Salesperson A's Router	374	(3)
Configure Salesperson B's Router	377	(2)
Case Study Summary	379	(5)
Questions	384	(3)
Answers	387	(2)
X.25	389	(42)
Chapter Introduction	390	(1)
Objectives Covered in this Chapter	390	(1)
Overview of X.25	390	(11)
Physical Layer	392	(1)
Data Link Layer	393	(1)
Network Layer	394	(1)
X.25 Virtual Circuits	395	(1)
X.25 Sessions	396	(1)
Packet Assembler/Disassembler (PAD)	397	(1)
Network User Address	398	(1)
X.25 Internetworking	399	(2)
Configuring X.25	401	(4)
X.25 Required Parameters	401	(1)
Configuring SVCs	402	(2)
Configuring PVCs	404	(1)
X.25 Additional Configuration Parameters	405	(4)
Configuring Virtual Circuit Ranges	405	(2)
Configuring Packet Sizes	407	(1)
Configuring Window Sizes	408	(1)
Configuring Window Modulus	408	(1)
The Cisco Router as an X.25 Switch	409	(1)
Verifying X.25	410	(3)
Verifying X.25 Virtual Circuit Mappings	410	(1)
Monitoring X.25 Virtual Circuits	411	(1)
Verifying and Troubleshooting Virtual Circuit Ranges	411	(2)
Chapter Summary	413	(1)
Frequently Asked Questions (FAQ)	414	(1)
Case Study	415	(10)
Objective	415	(1)
Required Equipment	415	(1)
Scenario	415	(1)
Required Information	416	(1)
Approach	416	(1)
Configure the Central Site	417	(1)
Configure Remote Site A	418	(1)
Configure Remote Site B	419	(2)
Configure the X.25 Switch	421	(1)
Case Study Summary	422	(3)
Questions	425	(3)
Answers	428	(3)
Frame Relay	431	(50)
Chapter Introduction	432	(1)
Objectives Covered in this Chapter	432	(1)
Overview of Frame Relay	432	(7)
Data Link Layer	434	(2)
The Data Link Connection Identifier (DLCI)	436	(1)
The Extended Address (EA)	437	(1)
The Forward Explicit Congestion Notification (FECN)	438	(1)
The Backward Explicit Congestion Notification (BECN)	438	(1)
The Discard Eligibility (DE)	439	(1)
The Committed Information Rate (CIR)	439	(1)
Configuring Frame Relay	439	(3)
Frame Relay Encapsulation	440	(1)
The Frame Relay Local Management Interface (LMI)	440	(2)
Address Mapping	442	(1)
Routing Considerations in a Frame Relay Environment	442	(6)
Split Horizon and Subinterfaces	445	(3)
Frame Relay Flow Considerations	448	(10)
Overview of Traffic Shaping	451	(2)
Configuring Map Classes for Rate Enforcement	453	(2)
Configuring Map Classes for Traffic Shaping	455	(1)
Cisco Router as a Frame Relay Switch	455	(3)
Verifying Frame Relay	458	(3)
Show Commands	458	(3)
Debug Commands	461	(1)
Chapter Summary	461	(1)
Frequently Asked Questions (FAQ)	462	(1)
Case Study	463	(13)
Objective	463	(1)
Required Equipment	463	(1)
Scenario	463	(1)
Required Information	464	(1)
Approach	465	(1)
Configure the Central Site	465	(2)
Configure Remote Site A	467	(2)
Configure Remote Site B	469	(2)
Configure the Frame Relay Switch	471	(2)
Case Study Summary	473	(3)
Questions	476	(3)
Answers	479	(2)
Using ISDN to Back Up Permanent WAN Connections	481	(30)
Chapter Introduction	482	(1)
Objectives Covered in this Chapter	482	(1)
Overview of Dial Backup	482	(1)
Configuring Dial Backup	483	(3)
Dial Backup for WAN Link Failures	483	(1)
Dial Backup for High Utilization of WAN Links	484	(2)
Dial Backup Considerations	486	(4)
Dialer Interfaces	486	(2)
Routing Protocols	488	(2)
Alternatives to Dial Backup	490	(2)
Floating Static Routes	490	(2)
Verifying Dial Backup	492	(1)
Chapter Summary	493	(1)
Frequently Asked Questions (FAQ)	494	(2)
Case Study	496	(10)
Objective	496	(1)
Required Equipment	497	(1)
Scenario	497	(1)
Required Information	497	(1)
Approach	498	(1)
Configure the Central Site	499	(2)
Configure Remote Site A	501	(3)
Case Study Summary	504	(2)
Questions	506	(4)
Answers	510	(1)
Managing Network Performance with Queuing	511	(32)
Chapter Introduction	512	(1)
Objectives Covered in this Chapter	512	(1)
Queuing	512	(2)
Purpose of Queuing	512	(1)
When to Use Queuing	513	(1)
Queuing Policies	513	(1)
Types of Queuing	514	(1)
Configuring Queuing	514	(13)
Weighted Fair Queuing (WFQ)	515	(2)
Priority Queuing	517	(5)
Custom Queuing	522	(5)
Verifying Queuing Operation	527	(3)
Which Queuing Strategy Should You Use?	530	(1)
Chapter Summary	531	(1)
Frequently Asked Questions (FAQ)	531	(1)
Case Study	532	(5)
Objective	532	(1)
Required Equipment	532	(1)
Scenario	532	(1)
Required Information	532	(1)
Approach	533	(1)
Configure the Central Site	533	(2)
Configure Remote Site A	535	(1)
Case Study Summary	536	(1)
Questions	537	(4)
Answers	541	(2)
Optimizing Network Performance with Data Compression	543	(28)
Chapter Introduction	544	(1)
Objectives Covered in this Chapter	544	(1)
Overview of Compression	544	(5)
The Purpose of Compression	544	(1)
Compression Encoding	544	(2)
Types of Compression	546	(2)
Summary of Compression Types	548	(1)
Configuring Compression	549	(5)
Point-to-Point Compression (Stac)	549	(1)
Point to-Point Compression (Predictor)	549	(1)
Microsoft Point-to-Point Compression	550	(1)
TCP Header Compression	551	(1)
Payload Compression	552	(2)
Compression Considerations	554	(1)
Modem Compression	554	(1)
Encrypted Data	555	(1)
CPU versus Memory	555	(1)
Verifying Compression	555	(2)
Show Commands	555	(1)
Debug Commands	556	(1)
Chapter Summary	557	(1)
Frequently Asked Questions (FAQ)	557	(1)
Case Study	558	(7)
Objective	558	(1)
Required Equipment	559	(1)
Scenario	559	(1)
Required Information	559	(1)
Approach	560	(1)
Configure the Central Site	560	(2)
Configure Remote Site A	562	(1)
Case Study Summary	563	(2)
Questions	565	(3)
Answers	568	(3)
IP Address Scaling with Network Address Translation (NAT)	571	(40)
Chapter Introduction	572	(1)
Objectives Covered in this Chapter	572	(1)
Overview of NAT	572	(7)
Public versus Private IP Addresses	573	(2)
End of Session	575	(1)
Static versus Dynamic Mapping	576	(1)
TCP Load Distribution	577	(1)
Overloading Inside Global IP Addresses	578	(1)
Overlapping Networks	578	(1)
NAT Considerations	579	(3)
Typical NAT Scenarios	579	(1)
NAT's Disadvantages	580	(2)
Configuring NAT	582	(12)
Configuring the NAT Inside Interface	583	(1)
Configuring the NAT Outside Interface	583	(1)
Configuring Static Mappings	584	(1)
Configuring Dynamic Mappings	584	(3)
Configuring Inside Global Address Overloading	587	(1)
Configuring TCP Load Distribution	587	(2)
Configuring NAT to Handle Overlapping Addresses	589	(3)
Various Timers	592	(2)
Verifying and Troubleshooting NAT	594	(4)
Show Commands	594	(2)
Debug Commands	596	(2)
Chapter Summary	598	(1)
Frequently Asked Questions (FAQ)	598	(1)
Case Study	599	(7)
Objective	599	(1)
Required Equipment	599	(1)
Scenario	600	(1)
Required Information	600	(1)
Approach	601	(1)
Configure the Dwyer, Inc. Office	601	(3)
Configure the Quiggle, Inc. Office	604	(1)
Case Study Summary	604	(2)
Questions	606	(4)
Answers	610	(1)
Scaling Remote Access Using AAA	611	(34)
Chapter Introduction	612	(1)
Objectives Covered in this Chapter	612	(1)
Overview of AAA	612	(5)
Authentication	612	(1)
Authorization	613	(1)
Accounting	614	(1)
Components Involved	614	(1)
Security Protocols	615	(1)
CiscoSecure	616	(1)
Configuring AAA	617	(13)
Authentication	618	(3)
Authorization	621	(1)
Accounting	622	(2)
Applying AAA to an Interface	624	(1)
RADIUS	625	(2)
TACACS+	627	(1)
Virtual Profiles	628	(2)
Troubleshooting AAA	630	(3)
Chapter Summary	633	(1)
Frequently Asked Questions (FAQ)	633	(1)
Case Study	634	(5)
Objective	634	(1)
Required Equipment	634	(1)
Scenario	635	(1)
Required Information	635	(1)
Approach	636	(1)
Configure AAA information	636	(1)
Configure RADIUS server	637	(1)
Associate the Dial-In Interface to the Method List	637	(1)
Case Study Summary	637	(2)
Questions	639	(4)
Answers	643	(2)
Virtual Private Dialup Networking	645	(30)
Chapter Introduction	646	(1)
Objectives Covered in this Chapter	646	(1)
Overview of Virtual Private Dialup Networks (VPDNs)	646	(7)
VPDN Tunnel Types	647	(1)
Current VPDN Protocols	648	(3)
Setting Up a Tunnel	651	(2)
Configuring L2F VPDN	653	(6)
Basic VPDN Configuration	653	(1)
Configure a NAS	654	(1)
Configure a Home-Gateway	655	(3)
L2TP Considerations	658	(1)
Verifying and Troubleshooting VPDNs	659	(3)
Chapter Summary	662	(1)
Frequently Asked Questions (FAQ)	662	(1)
Case Study	663	(7)
Objective	663	(1)
Required Equipment	663	(1)
Scenario	663	(1)
Required Information	663	(1)
Approach	664	(1)
Configure the Dwyer, Inc. Office	665	(2)
Configure the ISP	667	(1)
Case Study Summary	668	(2)
Questions	670	(4)
Answers	674	(1)
Appendix A Glossary	675	(8)
Appendix B Password Recovery	683	(8)
Password Recovery Procedure	683	(1)
Cisco 2000, 2500, 3000, 4000, and 7000 Series Routers Password Recovery	684	(2)
Cisco 3600, 4500, 4700, 7200, and 7500 Series Routers Password Recovery	686	(2)
Cisco 700 Series Router Password Recovery	688	(3)
Appendix C Bibliography	691	(2)
Appendix D Webliography	693	(6)
Appendix E OSI Model	699	(32)
Layer 1: The Physical Layer	699	(10)
Cables and Wires	699	(3)
Physical Terminations and Connectors	702	(4)
Physical Encoding Methods	706	(3)
Conclusion	709	(1)
Layer 2: The Data Link Layer	709	(5)
Data Link Layer Example	711	(3)
Conclusion	714	(1)
Layer 3: Network Layer	714	(6)
The Internet Protocol (IP)	717	(1)
IP Node Operation	717	(3)
Internetwork Packet Exchange (IPX) Operation	720	(1)
Layer 4: Transport Layer	720	(4)
Transport Layer Protocol Examples	722	(2)
Conclusion	724	(1)
Layer 5: Session Layer	724	(2)
Layer 6: Presentation Layer	726	(1)
Layer 7: Application Layer	727	(4)
Conclusion	728	(3)
Index	731