Extreme Networks BlackDiamond 6804 Manuale utente

Extreme Networks, Inc.

3585 Monroe Street

Santa Clara, California 95051

(888) 257-3000

http://www.extremenetworks.com

Advanced System

Diagnostics and

Troubleshooting Guide

Published: March 2005

Part number: 100189-00 Rev. 01

registered trademarks of Extreme Networks, Inc. in the United States and certain other jurisdictions. ExtremeWare Vista,

ExtremeWorks, ExtremeAssist, ExtremeAssist1, ExtremeAssist2, PartnerAssist, EPICenter, Extreme Standby Router

Protocol, ESRP, SmartTraps, Summit, Summit1i, Summit5i, Summit7i,Summit48i, Summit48si, SummitPx, Summit 200,

Summit Virtual Chassis, SummitLink, SummitGbX, SummitRPS and the Extreme Networks logo are trademarks of

Extreme Networks, Inc., which may be registered or pending registration in certain jurisdictions. The Extreme

Turbodrive logo is a service mark of Extreme Networks, which may be registered or pending registration in certain

jurisdictions. Specifications are subject to change without notice.

NetWare and Novell are registered trademarks of Novell, Inc. Merit is a registered trademark of Merit Network, Inc.

Solaris is a trademark of Sun Microsystems, Inc. F5, BIG/ip, and 3DNS are registered trademarks of F5 Networks, Inc.

see/IT is a trademark of F5 Networks, Inc.

“Data Fellows”, the triangle symbol, and Data Fellows product names and symbols/logos are

trademarks of Data Fellows.

F-Secure SSH is a registered trademark of Data Fellows.

All other registered trademarks, trademarks and service marks are property of their respective owners.

uthors:

ditor:

roduction:

pecial Thanks:

Advanced System Diagnostics and Troubleshooting Guide 3

Contents

Preface

Introduction 9

Terminology 9

Conventions 9

Related Publications 10

Chapter 1 Introduction

Introduction 11

Diagnostics: A Brief Historical Perspective 12

Overview of the ExtremeWare Diagnostics Suite 13

Supported Hardware 13

Applicable ExtremeWare Versions 13

Chapter 2 Hardware Architecture

Diagnostics Support 15

The BlackDiamond Systems 16

BlackDiamond 6800 Series Hardware Architecture Differences 16

The BlackDiamond Backplane 17

BlackDiamond I/O Modules 18

Management Switch Modules 19

BlackDiamond MSM Redundancy 20

Causes of MSM Failover and System Behavior 20

Alpine Systems 22

Summit Systems 23

4Advanced System Diagnostics and Troubleshooting Guide

Contents

Chapter 3 Packet Errors and Packet Error Detection

Overview 25

Definition of Terms 26

Standard Ethernet Detection for Packet Errors on the Wire 27

Extreme Networks’ Complementary Detection of Packet Errors Between Wires 27

Hardware System Detection Mechanisms 28

Software System Detection Mechanisms 29

Failure Modes 30

Transient Failures 30

Systematic Failures 30

Soft-State Failures 30

Permanent Failures 31

Responding to Failures 31

Error Messages for Fabric Checksums 31

Error Message Format 32

Fabric Checksum Error Message Logging 33

Checksum Message Examples 34

Panic/Action Error Messages 35

Panic/Action Message Example 36

Chapter 4 Software Exception Handling

Overview of Software Exception Handling Features 37

System Watchdog Behavior 37

System Software Exception Recovery Behavior 38

Redundant MSM Behavior 38

Configuring System Recovery Actions 40

Related Commands 40

Configuring System Recovery Actions 40

Usage Notes 41

Configuring Reboot Loop Protection 42

Related Commands 42

Configuring Reboot Loop Protection 42

Dumping the System Memory 44

Related Commands 44

Configuring an Automatic System Dump During System Recovery 44

Initiating a Manual System Dump 45

Chapter 5 Diagnostics

Diagnostic Test Functionality 47

How Diagnostic Tests are Run 47

How the Test Affects the Switch 48

Advanced System Diagnostics and Troubleshooting Guide 5

Contents

System Health Checks: A Diagnostics Suite 51

Diagnostic Suite Components 51

The Role of Memory Scanning and Memory Mapping 52

Modes of Operation 53

The Role of Processes to Monitor System Operation 54

Power On Self Test (POST) 55

Related Commands 55

Configuring the Boot-Up Diagnostics 55

Runtime (On-Demand) System Diagnostics 56

Normal System Diagnostics 56

Related Commands 56

Running the Normal Diagnostics on BlackDiamond Systems 57

Running the Normal Diagnostics on Alpine Systems 57

Running the Normal Diagnostics on Summit Systems 57

System Impact of Running the Normal Diagnostics 57

Extended System Diagnostics 58

Related Commands 58

Running the Extended Diagnostics on BlackDiamond Systems 58

Running the Extended Diagnostics on Alpine Systems 58

Running the Extended Diagnostics on Summit Systems 59

System Impact of Running the Extended Diagnostics 59

On Demand Packet Memory Scan 59

Related Commands 59

Running the Packet Memory Scan Diagnostics on BlackDiamond Systems 59

Running the Packet Memory Scan Diagnostics on Alpine Systems 59

Running the Packet Memory Scan Diagnostics on Summit Systems 60

Automatic Packet Memory Scan (via sys-health-check) 60

Memory Scanning and Memory Mapping Behavior 60

Limited Operation Mode 63

Effects of Running Memory Scanning on the Switch 63

Summit, Alpine, or BlackDiamond with a Single MSM 63

BlackDiamond System with Two MSMs 64

Interpreting Memory Scanning Results 65

Per-Slot Packet Memory Scan on BlackDiamond Switches 66

Related Commands 66

Configuring the Packet Memory Scan Recovery Mode 66

System Impact of Per-Slot Packet Memory Scanning 67

Network Impact of Per-Slot Packet Memory Scanning 67

System (CPU and Backplane) Health Check 69

Health Check Packet Types 69

Backplane Health Check States 69

Related Commands 69

Health Check Functionality 70

Alarm-Level Response Action 70

Auto-Recovery Response Action 70

Backplane Health Check 71

6Advanced System Diagnostics and Troubleshooting Guide

Contents

Viewing Backplane Health Check Results—show log Command 71

Viewing Backplane Health Check Diagnostic Results—show diagnostics Command 71

Analyzing the Results 76

CPU Health Check 77

Viewing CPU Health Check Results—show log Command 77

Viewing CPU Health Check Diagnostic Results—show diagnostics Command 78

Analyzing the CPU Health Check Results 78

Transceiver Diagnostics 80

Usage Guidelines 80

Related Commands 80

Configuring the Transceiver Diagnostics 80

System Impacts of the Transceiver Diagnostics 81

Network Impact of the Transceiver Diagnostics 81

Viewing Diagnostics Results 82

Example Log Messages for Transceiver Diagnostic Failures 82

Examples, show diagnostics Command 82

Example—show switch Command 84

Transceiver Diagnostic Result Analysis 84

FDB Scan 85

Usage Guidelines 85

Related Commands 86

Enabling FDB Scanning 86

Disabling FDB Scanning 86

Configuring the FDB Scan Diagnostics 86

System Impact of the FDB Scan Diagnostic 87

Network Impact of the FDB Scan Diagnostic 87

Viewing Diagnostics Results 88

Example Log Messages for FDB Scan Diagnostic Failures 88

Example FDB Scan Results from the show diagnostics Command 88

Example Output from the show switch command 89

Example Output from the show fdb remap Command 89

Chapter 6 Additional Diagnostics Tools

Temperature Logging 92

Related Commands 92

System Impacts of Temperature Logging 92

Network Impact of Temperature Logging 92

Syslog Servers 93

Related Commands 93

Enabling Logging to Remote Syslog Server Targets 93

Disabling Logging to Remote Syslog Server Targets 93

Adding a Syslog Server 94

Deleting a Remote Syslog Server 94

System Impact of the Syslog Server Facility 94

Network Impact of the Syslog Server Facility 94

Advanced System Diagnostics and Troubleshooting Guide 7

Contents

Chapter 7 Troubleshooting Guidelines

Contacting Extreme Technical Support 95

Americas TAC 95

Asia TAC 96

EMEA TAC 96

Japan TAC 96

What Information Should You Collect? 97

Analyzing Data 97

Diagnostic Troubleshooting 98

Extreme Networks’ Recommendations 99

Using Memory Scanning to Screen I/O Modules 101

Appendix A Limited Operation Mode and Minimal Operation Mode

Limited Operation Mode 103

Triggering Limited Operation Mode 104

Bringing a Switch Out of Limited Operation Mode 104

Minimal Operation Mode 104

Triggering Minimal Operation Mode 104

Bringing a Switch Out of Minimal Operation Mode 105

Appendix B Reference Documents

General Information 107

Other Documentation Resources 107

Index

8Advanced System Diagnostics and Troubleshooting Guide

Contents

Advanced System Diagnostics and Troubleshooting Guide 9

Preface

This Preface provides an overview of this guide, describes guide conventions, and lists other

publications that might be useful.

Introduction

This guide describes how to use the ExtremeWare hardware diagnostics suite to test and validate the

operating integrity of Extreme Networks switches. The tools in the diagnostic suite are used to detect,

isolate, and treat faults in a system.

This guide is intended for use by network designers, planners, and operations staff.

Terminology

When features, functionality, or operation is specific to a modular or stand-alone switch family, the

family name is used. Explanations about features and operations that are the same across all product

families simply refer to the product as the “switch.”

Conventions

Table 1 and Table 2 list conventions that are used throughout this guide.

Table 1: Notice Icons

Icon Notice Type Alerts you to...

Note Important features or instructions.

Caution Risk of personal injury, system damage, or loss of data.

Warning Risk of severe personal injury.

10 Advanced System Diagnostics and Troubleshooting Guide

Preface

Related Publications

The publications related to this one are:

•ExtremeWare Software User Guide, Software Version 6.2.2.

•ExtremeWare Software Command Reference, Software Version 6.2.2.

•ExtremeWare Error Message Decoder.

Documentation for Extreme Networks products is available on the World Wide Web at the following

location:

http://www.extremenetworks.com/

Table 2: Text Conventions

Convention Description

Screen displays This typeface indicates command syntax, or represents information as it appears on the

screen.

The words “enter”

and “type” When you see the word “enter” in this guide, you must type something, and then press

the Return or Enter key. Do not press the Return or Enter key when an instruction

simply says “type.”

[Key] names Key names are written with brackets, such as [Return] or [Esc].

If you must press two or more keys simultaneously, the key names are linked with a

plus sign (+). Example:

Press [Ctrl]+[Alt]+[Del].

Letter in bold type Letters within a command that appear in bold type indicate the keyboard shortcut for a

command. When entering the command, you can use just the bolded letters instead of

the entire word.

Words in italicized type Italics emphasize a point or denote new terms at the place where they are defined in

the text.

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