CCNP^®: Cisco Internetwork Troubleshooting Study Guide (Exam 642-831)

by Arthur Pfund; Todd Lammle

• ISBN13: 9780782142952
• ISBN10: 0782142958
• Edition: 3rd
• Format: Paperback
• Copyright: 2003-11-01
• Publisher: Sybex

Summary

Here's the book you need to prepare the latest Cisco Internetwork Troubleshooting Support (CIT) exam, 642-831. This Study Guide provides: In-depth coverage of key exam topics Practical information on troubleshooting and optimizing Cisco internetworks Hundreds of challenging review questions Leading-edge exam preparation software, including a test engine, sample simulation questions, and electronic flashcards Authoritative coverage of all exam objectives, including: Establishing an optimal system baseline Diagramming and documenting system topology and end system configuration Verifying connectivity at all layers Selecting an optimal troubleshooting approach Planning a network documentation system and baseline monitoring scheme Using Cisco IOS commands and applications to identify and isolate system problems Resolving sub-optimal system performance problems Restoring optimal baseline service Working with external providers and system users to resolve service provision problems Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.

Table of Contents

Introduction	xvii
Assessment Test	xxix
Chapter 1 Troubleshooting Methodology	1	(24)
The Complexity of Internetworks	2	(2)
The Problem-Solving Model	4	(13)
Step 1: Define the Problem	6	(1)
Step 2: Gather Facts	7	(6)
Step 3: Consider Possibilities	13	(1)
Steps 4 and 5: Create and Implement the Action Plan	13	(2)
Step 6: Observe Results	15	(1)
Step 7: Iterate as Needed	16	(1)
Document the Changes	16	(1)
Summary	17	(1)
Exam Essentials	17	(1)
Key Terms	18	(1)
Review Questions	19	(4)
Answers to Review Questions	23	(2)
Chapter 2 Network Documentation	25	(28)
The Network Baseline	26	(1)
Network Configuration Table	27	(11)
Router Network Configuration Table	29	(4)
Switch Network Configuration Table	33	(5)
Network Topology Diagrams	38	(6)
Components of a Network Topology Diagram	38	(1)
Creating a Network Topology Diagram	39	(5)
Summary	44	(1)
Exam Essentials	44	(1)
Commands Used in This Chapter	45	(1)
Key Terms	46	(1)
Review Questions	47	(4)
Answers to Review Questions	51	(2)
Chapter 3 End-System Documentation and Troubleshooting	53	(38)
End-System Network Configuration Table	54	(9)
Creating an End-System Network Configuration Table	55	(8)
End-System Network Topology Diagram	63	(3)
Creating an End-System Network Topology Diagram	65	(1)
Troubleshooting End-System Problems	66	(15)
Troubleshooting by Layer	66	(1)
End-System Troubleshooting Commands	67	(14)
Summary	81	(1)
Exam Essentials	82	(1)
Commands Used in This Chapter	83	(1)
Key Terms	84	(1)
Review Questions	85	(4)
Answers to Review Questions	89	(2)
Chapter 4 Protocol Attributes	91	(38)
The OSI Reference Model	92	(3)
Global Protocol Classifications	95	(5)
Connection-Oriented Protocols	95	(4)
Connectionless Protocols	99	(1)
Layer 2: Data-Link Layer Protocols and Applications	100	(5)
Ethernet/IEEE 802.3	101	(2)
Token Ring/IEEE 802.5	103	(2)
Token Frame Format	105	(1)
Point-to-Point Protocol (PPP)	106	(1)
Synchronous Data Link Control (SDLC)	106	(3)
Frame Structure	107	(2)
Frame Relay	109	(1)
Frame Structure	109	(1)
Integrated Services Digital Network (ISDN)	110	(2)
Frame Structure	111	(1)
Layers 3 and 4: IP Routed Protocols	112	(9)
Internet Protocol (IP)	112	(5)
Internet Control Message Protocol (ICMP)	117	(1)
Transmission Control Protocol (TCP)	118	(2)
User Datagram Protocol (UDP)	120	(1)
Summary	121	(1)
Exam Essentials	121	(1)
Key Terms	122	(1)
Review Questions	123	(4)
Answers to Review Questions	127	(2)
Chapter 5 Cisco Diagnostic Commands and TCP/IP Connectivity Troubleshooting	129	(64)
Troubleshooting Commands	130	(42)
show Commands	130	(23)
debug Commands	153	(7)
logging Commands	160	(2)
Executing a Router Core Dump	162	(2)
ping Commands	164	(4)
traceroute Command	168	(4)
LAN Connectivity Problems	172	(6)
Obtaining an IP Address	172	(3)
ARP	175	(2)
Sample TCP Connection	177	(1)
IP Access Lists	178	(5)
Standard Access Lists	178	(2)
Extended Access Lists	180	(2)
Named Access Lists	182	(1)
Summary	183	(1)
Exam Essentials	184	(1)
Commands Used in This Chapter	185	(1)
Key Terms	186	(1)
Review Questions	187	(4)
Answers to Review Questions	191	(2)
Chapter 6 TCP/IP Routing Protocol Troubleshooting	193	(50)
Default Gateways	194	(3)
Static and Dynamic Routing	197	(1)
Troubleshooting RIP	198	(2)
RIP-1 and RIP-2	199	(1)
show Commands	199	(1)
debug Commands	199	(1)
Typical RIP Problems	200	(1)
Troubleshooting IGRP	200	(2)
IGRP Features and Operation	200	(1)
show Commands	201	(1)
debug Commands	201	(1)
Typical IGRP Problems	202	(1)
Troubleshooting EIGRP	202	(7)
Neighbor Formation	203	(4)
show Commands	207	(1)
debug Commands	207	(1)
Typical EIGRP Problems	208	(1)
Troubleshooting OSPF	209	(8)
Neighbor and Adjacency Formation	210	(1)
OSPF Area Types	211	(2)
show Commands	213	(1)
debug Commands	214	(2)
Typical OSPF Problems	216	(1)
Troubleshooting BGP	217	(4)
Neighbor Relationship	217	(1)
eBGP vs. iBGP	217	(1)
show Commands	218	(1)
debug Commands	219	(1)
Typical BGP Problems	220	(1)
Redistribution of Routing Protocols	221	(7)
Dealing with Routing Metrics	221	(3)
Distribute Lists	224	(2)
Route Maps	226	(2)
TCP/IP Symptoms and Problems: Summary Sheet	228	(1)
TCP/IP Symptoms and Action Plans: Summary Sheet	229	(2)
Summary	231	(1)
Exam Essentials	231	(1)
Commands Used in This Chapter	232	(3)
Key Terms	235	(1)
Review Questions	236	(5)
Answers to Review Questions	241	(2)
Chapter 7 Troubleshooting Serial Line and Frame Relay Connectivity	243	(36)
Troubleshooting Serial Lines	244	(16)
HDLG Encapsulation	245	(1)
show interface serial Command	246	(4)
show controllers Command	250	(2)
show buffers Command	252	(1)
debug serial interface Command	253	(2)
CSU/DSU Loopback Tests	255	(2)
Serial Line Summary	257	(3)
Troubleshooting Frame Relay	260	(8)
Frame Relay show Commands	261	(4)
Frame Relay debug Commands	265	(1)
Frame Relay Summary	266	(2)
Summary	268	(1)
Exam Essentials	269	(1)
Commands Used in This Chapter	270	(1)
Key Terms	271	(1)
Review Questions	272	(4)
Answers to Review Questions	276	(3)
Chapter 8 Troubleshooting ISDN	279	(40)
ISDN Fundamentals	280	(1)
Common ISDN Problems	281	(8)
Misconfigured Routers	281	(5)
Physical Layer Connections	286	(3)
Misconfigured Phone Switches	289	(5)
Troubleshooting Layer 2	289	(3)
Troubleshooting Layer 3	292	(1)
Switch Types	293	(1)
ISDN Troubleshooting Commands	294	(7)
ping	295	(1)
clear interface bri n	295	(1)
show interface bri n	296	(1)
show interface bri n 1 2	297	(1)
show controller bri	298	(1)
show isdn status	298	(2)
show dialer	300	(1)
show ppp multilink	300	(1)
Debugging ISDN	301	(8)
debug bri	301	(1)
debug isdn 8921	302	(2)
debug dialer	304	(1)
debug isdn 8931	304	(1)
debug ppp negotiation	305	(3)
debug ppp packet	308	(1)
Summary	309	(1)
Exam Essentials	310	(1)
Commands Used in This Chapter	310	(2)
Key Terms	312	(1)
Review Questions	313	(4)
Answers to Review Questions	317	(2)
Chapter 9 Troubleshooting Switched Ethernet	319	(56)
Switches, Bridges, and Hubs	320	(2)
Catalyst Troubleshooting Tools	322	(24)
Catalyst Command-Line Interfaces	322	(1)
Hybrid Mode Catalyst CLI	322	(24)
RMON	346	(1)
Indicator Lights	346	(1)
Controlling Recurring Paths with Spanning Tree	346	(3)
Troubleshooting Spanning Tree Problems	347	(2)
Virtual LANs	349	(4)
Inter-Switch Link (ISL)	349	(3)
802.1Q Trunking	352	(1)
VLAN Trunking Protocol (VTP)	352	(1)
Cabling Issues	353	(3)
Cable Problems	354	(1)
Crossover Cables	355	(1)
Troubleshooting Switched Connections	356	(7)
The Switched Port Analyzer	357	(1)
The Multilayer Switch Feature Card and Catalyst Routing	357	(2)
VLANs across Routers and Switches	359	(2)
VLAN Design Issues and Troubleshooting	361	(2)
Hybrid/Native Command Conversion	363	(1)
Summary	364	(1)
Exam Essentials	365	(1)
Commands Used in This Chapter	366	(2)
Key Terms	368	(1)
Review Questions	369	(4)
Answers to Review Questions	373	(2)
Chapter 10 Applying Cisco's Diagnostic Tools	375	(56)
Identifying and Resolving Generic Router Problems	376	(30)
Scenario #1	376	(13)
Scenario #2	389	(11)
Scenario #3	400	(6)
Troubleshooting Ethernet Problems	406	(10)
Scenario #1	406	(4)
Scenario #2	410	(6)
Troubleshooting Token Ring Problems	416	(5)
Scenario #1	416	(5)
Opening a Case with the Technical Assistance Center	421	(1)
Summary	421	(1)
Exam Essentials	422	(1)
Commands Used in This Chapter	423	(1)
Review Questions	424	(7)
Glossary	431	(58)
Index	489