Catalyst Poweron Self Test
When you power-on a Catalyst 5000 switch, a self-diagnostics routine (often referred to as the power-on self-test or POST) is performed. This routine performs diagnostics tests on several components, such as ROM, RAM, DRAM, EARL, and BOOTROM.The result of the test performed on each component is displayed on the console (see Example 8-1). If you are not present at the console during the power-on self-test, you may use the output of the show test and show system commands to see the status of the...
CCO Case Management Toolkit
The CCO Case Management Toolkit is a web tool for customers with appropriate service arrangements to open, query, and update cases with Cisco TAC. Figure 1-10 displays the Case Open Help Guide (accessed from the TAC home page). Figure 1-10 The Case Open Help Guide JjsjCisco Technical Assistance Center (TAC) sco. com public support help, shtml I Profile I Feedback Search Map Help How to Use the Cisco World-Wide Technical Assistance Center Servi Order Status Em-all CCO Team This document provides...
Debug ip icmp
This command displays information about Internal Control Message Protocol (ICMP) transactions and allows you to monitor the ICMP messages sent and received by your router. Each ICMP message has a source, destination, type, and code number. RFC-792 provides complete coverage of the fields in debug ip icmp output. Example 5-8 is a debug ip icmp output sample that shows a case with five echo replies received, and a case with three host unreachable messages received. Example 5-8 debug ip icmp...
ISDN Layer
ISDN Layer 2 is concerned with the communication between the TE and the ISDN switch over the D channel. The LAPD protocol is used for this purpose. LAPD delivers control and signaling information between the TE (the router, for instance) and the ISDN switch. The LAPD protocol is formally specified in ITU-T Q.920 and ITU-T Q.921. The show isdn status command can be used to discover the status of ISDN Layer 2. If ISDN Layer 2 is reported as NOT Activated, you must first find out if ISDN Layer 1...
Cisco Works for Switched Internetworks Software
CWSI Campus is a suite of network management applications that together provide remote monitoring, configuration, and management of switched internetworks. The following are included in the CWSI Campus package For a description of these components, refer to www.cisco.com univercd cc td doc at the Cisco Documentation site. CWSI can be integrated with other SNMP-based network management systems, such as SunNet Manager, HP OpenView, and IBM NetView. Protocols such as SNMP, Cisco Discovery Protocol...
The show interfaces atm Command
As you can see from the sample output of the show interfaces atm command in Example 3-7, there are some fields displayed similar to those displayed when you issue other show interface commands. For example, the first line of the output of this command displays the state of the physical ATM interface along with the state of its link integrity, as explained in Table 3-6. Example 3-7 The show interfaces atm Command Output ATM1 0 is up, line protocol is up Hardware is cxBus ATM Internet address is...
Traceroute Command IP User and Privileged
Use the traceroute command to find the path between IP devices. Trace, introduced with the release 10.0 of Cisco IOS, is currently available only for the IP protocol. The traceroute command can be executed from the user and the privileged exec modes, but from the privileged exec mode, you have the ability to use the extended trace, which is more flexible and informative. NOTE The command traceroute is commonly used in its short form, trace. With the release 12.0 of Cisco IOS, traceroute is also...
General Problem Isolation Method for Tcpip Connectivity
In this section, a sample TCP IP network (with Microsoft hosts) is presented and the general requirements for proper operation of Telnet application in that network are specified. After that, the example is turned into a troubleshooting case. You will be walked through the step-by-step tests and checks you must run to isolate the cause of problems, and Example 5-13 debug ip ospf Command Output OSPF adjacency events OSPF events OSPF flooding OSPF lsa generation OSPF packets what you need to do...
CCIE Professional Development
Kennedy Clark, CCIE Kevin Hamilton, CCIE 1-57870-094-9 AVAILABLE NOW This volume provides an in-depth analysis of Cisco LAN switching technologies, architectures, and deployments, including unique coverage of Catalyst network design essentials. Network designs and configuration examples are incorporated throughout to demonstrate the principles and enable easy translation of the material into practice in production networks. Alvaro Retana, CCIE Don Slice, CCIE and Russ White, CCIE 1-57870-097-3...
Foundation Summary
The Foundation Summary is a collection of quick reference information that provides a convenient review of many key concepts in this chapter. For those of you who already feel comfortable with the topics in this chapter, this summary helps you recall a few details. For those of you who just read this chapter, this review should help solidify some key facts. For any of you doing your final prep before the exam, these tables and figures are a convenient way to review the day before the exam....
Do I Know This Already Quiz
1 What is the default frame type for the serial interfaces of Cisco routers that have been configured with the encapsulation frame-relay command 2 What are the two frame types supported on the Frame Relay (serial) interfaces of a Cisco router 3 Can the LMI type be autosensed by any of the IOS releases Yes. As of IOS release 11.2 the LMI type is auto-sensed. 4 What are the LMI types supported by Cisco IOS Cisco, ANSI, Q933a. 5 Does the LMI type have to be identical on both ends of a Frame Relay...
Catalyst 5000 Switch Diagnostic Tools ping and CDP
To make use of ping, the valuable IP connectivity testing tool, on a Catalyst switch, you must assign an IP address and subnet mask to the switch's system console 0 (SCO). Since SCO is assigned to VLAN number 1 by default (this is modifiable), you have to make sure that the IP address you assign to SCO is appropriate for VLAN 1. In other words, the IP address of SCO must be chosen from the address space IP subnet that corresponds to the VLAN number assigned to SCO. It is a common error to...
Apple Talk Connection Sequence
In order to troubleshoot AppleTalk connection problems, you must understand the AppleTalk connection sequence. The connection sequence often begins when an Apple Macintosh client opens the Chooser applet from Apple's pull-down menu. This action triggers the Macintosh device to send a GetZoneList request on its connected network. The Router(s) on the local segment respond using GetZoneList reply, based on their Apple Zone table and any GetZoneList filters that may be applied to their appropriate...
Show interface serial n
The output of the show interface serial n command gives you some information similar to the output of the show command for other types of interfaces. However, with this command you must also concentrate on the type of information that is particular to Frame Relay. Example 10-1 displays a sample output of this command for a Serial interface that is configured with the encapsulation frame-relay command and has three point-to-point subinterfaces. The line numbers in Example 10-1 were added for the...
Introduction
This book is one of the members of the Cisco Press family of publications that has been developed to help you prepare yourself for the Cisco Certification examinations. This book's specific target is the Support exam (formerly the Cisco Internetwork Troubleshooting CIT Exam). I am a Certified Cisco Systems Instructor, and CIT is one of the courses that I teach. I started teaching this course in the first quarter of 1999. I have passed both the old CIT 4.0 and the new Support exams, and I am...
About the Author
Ranjbar (CCNP) is an instructor and senior network architect for Global Knowledge, Cisco's largest training partner. He is a Certified Cisco Systems Instructor (CCSI) who teaches the Cisco Internetwork Troubleshooting course on a regular basis. Born in Tehran, Iran, Amir moved to Canada in 1983 and obtained his Bachelors degree in Computing and Information Science (1988) and Master of Science degree in Knowledge Based Systems (1991) from the University of Guelph (Guelph, Ontario). After...
