Extreme Networks ExtremeWare Version 7.8 Guide de dépannage

Extreme Networks, Inc. 3585 Monroe Street Santa Clara, California 95051(888) 257-3000http://www.extremenetworks.comAdvanced System Diagnostics and Tro

10 Advanced System Diagnostics and Troubleshooting GuidePrefaceRelated PublicationsThe publications related to this one are:• ExtremeWare Software Use

100 Advanced System Diagnostics and Troubleshooting GuideAdditional Diagnostics Toolslength. For example, a 2% error in the default value of the speed

Cable DiagnosticsAdvanced System Diagnostics and Troubleshooting Guide 101Extended Cable Status Information (Gigabit link established). When the Giga

102 Advanced System Diagnostics and Troubleshooting GuideAdditional Diagnostics Tools

Advanced System Diagnostics and Troubleshooting Guide 1037 Troubleshooting GuidelinesWhen a problem arises in the network, you should gather consisten

104 Advanced System Diagnostics and Troubleshooting GuideTroubleshooting GuidelinesAsia TACAsia Pacific Rim, except Japan Located in Santa Clara, CA U

What Information Should You Collect?Advanced System Diagnostics and Troubleshooting Guide 105What Information Should You Collect?• Mandatory technical

106 Advanced System Diagnostics and Troubleshooting GuideTroubleshooting GuidelinesDiagnostic TroubleshootingFor “i” series switches, observe the foll

Extreme Networks’ RecommendationsAdvanced System Diagnostics and Troubleshooting Guide 107Extreme Networks’ RecommendationsExtreme Networks strongly r

108 Advanced System Diagnostics and Troubleshooting GuideTroubleshooting Guidelines2 Did the problem go away?If it did, monitor the operation of the s

Using Memory Scanning to Screen I/O ModulesAdvanced System Diagnostics and Troubleshooting Guide 109Using Memory Scanning to Screen I/O ModulesNOTEMem

Advanced System Diagnostics and Troubleshooting Guide 111 IntroductionThis guide describes how to use the ExtremeWare hardware diagnostics suite to te

110 Advanced System Diagnostics and Troubleshooting GuideTroubleshooting Guidelines

Advanced System Diagnostics and Troubleshooting Guide 111A Limited Operation Mode and Minimal Operation ModeThis appendix describes two switch operati

112 Advanced System Diagnostics and Troubleshooting GuideLimited Operation Mode and Minimal Operation ModeTriggering Limited Operation ModeOn a BlackD

Minimal Operation ModeAdvanced System Diagnostics and Troubleshooting Guide 113To detect a reboot loop, a timestamp and a counter are saved. Each time

114 Advanced System Diagnostics and Troubleshooting GuideLimited Operation Mode and Minimal Operation Mode

Advanced System Diagnostics and Troubleshooting Guide 115B Reference DocumentsThis appendix lists additional documentation and other information resou

116 Advanced System Diagnostics and Troubleshooting GuideReference Documents• White papers and solutions documentation:— Advanced technologies— Applic

Advanced System Diagnostics and Troubleshooting Guide 117IndexSymbols"e" series 13, 59, 101"hitless" MSM failover 21, 39"i&qu

118 Advanced System Diagnostics and Troubleshooting GuideIndexdefined 27error detection mechanisms 28fast-path checksum error 29fast pathchecksum erro

Advanced System Diagnostics and Troubleshooting Guide 119IndextBGTask 40, 41tConsole 41tEdpTask 40, 41tEsrpTask 40, 41tExcTask 41tExtTask 41tLogTask 4

12 Advanced System Diagnostics and Troubleshooting GuideIntroductionDiagnostics: A Brief Historical PerspectiveDiagnostic utility programs were create

120 Advanced System Diagnostics and Troubleshooting GuideIndex

Advanced System Diagnostics and Troubleshooting Guide 121Index of CommandsAabort diagnostics cable 96, 97Cclear fdb remap 91clear log 93clear log d

122 Advanced System Diagnostics and Troubleshooting GuideIndex of Commandsshow fdb remap 91, 106show log 72, 84, 91, 93, 105, 112, 113show packet-me

Supported HardwareAdvanced System Diagnostics and Troubleshooting Guide 13• On-demand system hardware diagnostics—Run on demand through user CLI comma

14 Advanced System Diagnostics and Troubleshooting GuideIntroduction

Advanced System Diagnostics and Troubleshooting Guide 152 “i” Series Switch Hardware ArchitectureThis chapter provides a brief summary of the “i” seri

16 Advanced System Diagnostics and Troubleshooting Guide“i” Series Switch Hardware ArchitectureThe BlackDiamond SystemsIn the context of the advanced

The BlackDiamond SystemsAdvanced System Diagnostics and Troubleshooting Guide 17The BlackDiamond BackplaneThe BlackDiamond backplane is a passive back

18 Advanced System Diagnostics and Troubleshooting Guide“i” Series Switch Hardware ArchitectureBlackDiamond I/O ModulesEach BlackDiamond I/O module ha

The BlackDiamond SystemsAdvanced System Diagnostics and Troubleshooting Guide 19packet memory for temporary storage. Based on the information in memor

2©2005 Extreme Networks, Inc. All rights reserved. Extreme Networks, ExtremeWare, Alpine, and BlackDiamond are registered trademarks of Extreme Networ

20 Advanced System Diagnostics and Troubleshooting Guide“i” Series Switch Hardware ArchitectureBlackDiamond MSM RedundancyThe CPU subsystems on a pair

The BlackDiamond SystemsAdvanced System Diagnostics and Troubleshooting Guide 21The MSM failover behavior depends on the following factors:• Platform

22 Advanced System Diagnostics and Troubleshooting Guide“i” Series Switch Hardware ArchitectureAlpine SystemsLike the BlackDiamond systems, the Alpine

Summit “i” Series SystemsAdvanced System Diagnostics and Troubleshooting Guide 23Summit “i” Series SystemsUnlike the BlackDiamond and Alpine systems,

24 Advanced System Diagnostics and Troubleshooting Guide“i” Series Switch Hardware Architecture

Advanced System Diagnostics and Troubleshooting Guide 253 Packet Errors and Packet Error DetectionThis chapter describes some of the factors that migh

26 Advanced System Diagnostics and Troubleshooting GuidePacket Errors and Packet Error DetectionDefinition of TermsTo establish a basis for the descri

Standard Ethernet Detection for Packet Errors on the WireAdvanced System Diagnostics and Troubleshooting Guide 27Standard Ethernet Detection for Packe

28 Advanced System Diagnostics and Troubleshooting GuidePacket Errors and Packet Error DetectionFigure 8: Generalized switch block diagramThe followi

Extreme Networks’ Complementary Detection of Packet Errors Between WiresAdvanced System Diagnostics and Troubleshooting Guide 29transmitted, but an in

Advanced System Diagnostics and Troubleshooting Guide 3ContentsPrefaceIntroduction 9Terminology 9Conventions 9Related Publications 10Chapter 1 Introdu

30 Advanced System Diagnostics and Troubleshooting GuidePacket Errors and Packet Error Detectiondescribed in the section “System (CPU and Backplane) H

Failure ModesAdvanced System Diagnostics and Troubleshooting Guide 31Failures of this type are the result of software or hardware systems entering an

32 Advanced System Diagnostics and Troubleshooting GuidePacket Errors and Packet Error DetectionThe slow-path and fast-path categories each have a sep

Health Check MessagesAdvanced System Diagnostics and Troubleshooting Guide 33The following examples describe how these values apply to a BlackDiamond

34 Advanced System Diagnostics and Troubleshooting GuidePacket Errors and Packet Error DetectionThe intent of these messages is to alert the NOC that

Health Check MessagesAdvanced System Diagnostics and Troubleshooting Guide 35These messages appear in the log when EDP packets received are corrupted:

36 Advanced System Diagnostics and Troubleshooting GuidePacket Errors and Packet Error DetectionThe PBUS checksum type might indicate a problem with t

Advanced System Diagnostics and Troubleshooting Guide 374 Software Exception HandlingThis chapter describes the software exception handling features b

38 Advanced System Diagnostics and Troubleshooting GuideSoftware Exception HandlingThe system-watchdog feature is enabled by default. The CLI commands

Overview of Software Exception Handling FeaturesAdvanced System Diagnostics and Troubleshooting Guide 39switch is equipped with MSM-64i modules), or 2

4 Advanced System Diagnostics and Troubleshooting GuideContentsDefinition of Terms 26Standard Ethernet Detection for Packet Errors on the Wire 27Extre

40 Advanced System Diagnostics and Troubleshooting GuideSoftware Exception HandlingConfiguring System Recovery ActionsExtremeWare provides a user-conf

Configuring System Recovery ActionsAdvanced System Diagnostics and Troubleshooting Guide 41Configuring System Recovery Actions on “e” Series SwitchesT

42 Advanced System Diagnostics and Troubleshooting GuideSoftware Exception Handlingback into the network during a scheduled outage window. This might

Configuring Reboot Loop ProtectionAdvanced System Diagnostics and Troubleshooting Guide 43Configuring Reboot Loop ProtectionReboot loop protection pre

44 Advanced System Diagnostics and Troubleshooting GuideSoftware Exception HandlingOn BlackDiamond switches you can configure the number of times the

Dumping the “i” Series Switch System MemoryAdvanced System Diagnostics and Troubleshooting Guide 45Dumping the “i” Series Switch System MemoryOn “i” s

46 Advanced System Diagnostics and Troubleshooting GuideSoftware Exception Handling• Configure the system dump as a system recovery response action.To

Dumping the “i” Series Switch System MemoryAdvanced System Diagnostics and Troubleshooting Guide 47Example Log for a Software ExceptionThe following l

48 Advanced System Diagnostics and Troubleshooting GuideSoftware Exception Handling

Advanced System Diagnostics and Troubleshooting Guide 495 DiagnosticsThis chapter describes how to configure and use the Extreme Advanced System Diagn

Advanced System Diagnostics and Troubleshooting Guide 5ContentsThe Role of Processes to Monitor System Operation 55Power On Self Test (POST) 56Related

50 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsSome diagnostic tests, such as the slot-based hardware diagnostics (including the p

Diagnostic Test FunctionalityAdvanced System Diagnostics and Troubleshooting Guide 51Diagnostic tests are processed by the CPU. When invoked, each dia

52 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsFigure 10: Backplane health check paths (BlackDiamond architecture)System Health C

System Health Checks: A Diagnostics SuiteAdvanced System Diagnostics and Troubleshooting Guide 53— Offer configurable levels— Remove the switch fabric

54 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsscanning and memory mapping diagnostics are used to identify and correct switch fab

System Health Checks: A Diagnostics SuiteAdvanced System Diagnostics and Troubleshooting Guide 55Automatic Mode. Automatic mode for initiating a memo

56 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsPower On Self Test (POST)The POST actually consists of two test processes: a “pre-P

Runtime (On-Demand) System DiagnosticsAdvanced System Diagnostics and Troubleshooting Guide 57Runtime (On-Demand) System DiagnosticsThe ExtremeWare di

58 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsBlackDiamond systems—whether the module type being tested is an MSM or an I/O modul

Runtime (On-Demand) System DiagnosticsAdvanced System Diagnostics and Troubleshooting Guide 59System Impact of Running the Diagnostics on “i” Series S

6 Advanced System Diagnostics and Troubleshooting GuideContentsSystem Impacts of the Transceiver Diagnostics 83Network Impact of the Transceiver Diagn

60 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsNOTEOnly run these diagnostics when the switch can be brought off-line. The tests p

Automatic Packet Memory Scan (via sys-health-check)Advanced System Diagnostics and Troubleshooting Guide 61Automatic mode status is listed in the “sys

62 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsTable 7 describes the behavior of the switch if you run diagnostics manually on “i”

Automatic Packet Memory Scan (via sys-health-check)Advanced System Diagnostics and Troubleshooting Guide 63Table 8 describes the behavior of the switc

64 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsLimited Operation ModeA switch enters limited operation mode when some system healt

Automatic Packet Memory Scan (via sys-health-check)Advanced System Diagnostics and Troubleshooting Guide 65During the memory scan, the CPU utilization

66 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsInterpreting Memory Scanning ResultsIf single-bit permanent errors are detected on

Per-Slot Packet Memory Scan on BlackDiamond SwitchesAdvanced System Diagnostics and Troubleshooting Guide 67Per-Slot Packet Memory Scan on BlackDiamon

68 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsTo disable packet memory scanning on a BlackDiamond module and return to the behavi

Per-Slot Packet Memory Scan on BlackDiamond SwitchesAdvanced System Diagnostics and Troubleshooting Guide 69modules will trigger a reboot if the faile

Advanced System Diagnostics and Troubleshooting Guide 7ContentsAsia TAC 104EMEA TAC 104Japan TAC 104What Information Should You Collect? 105Analyzing

70 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsSystem (CPU and Backplane) Health CheckThe purpose of the system health check featu

System (CPU and Backplane) Health CheckAdvanced System Diagnostics and Troubleshooting Guide 71Related Commandsenable sys-health-checkdisable sys-heal

72 Advanced System Diagnostics and Troubleshooting GuideDiagnosticswhere:Alpine or Summit “i” series Switches. To configure the switch to respond to

System (CPU and Backplane) Health CheckAdvanced System Diagnostics and Troubleshooting Guide 73NOTEFrequent corrupted packets indicate a failure that

74 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsBackplane Health Check Diagnostic Results—Example 1. Example 1 shows the report fr

System (CPU and Backplane) Health CheckAdvanced System Diagnostics and Troubleshooting Guide 75To clarify the relationship between MSM ports, the back

76 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsBackplane Health Check Diagnostic Results—Example 2. Example 2 shows a report for

System (CPU and Backplane) Health CheckAdvanced System Diagnostics and Troubleshooting Guide 77Backplane Health Check Diagnostic Results—Example 3. E

78 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsBackplane Health Check Diagnostic Results—Example 4. Example 4 shows a report for

System (CPU and Backplane) Health CheckAdvanced System Diagnostics and Troubleshooting Guide 79• If a health check checksum error message appears in t

8 Advanced System Diagnostics and Troubleshooting GuideContents

80 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsNOTEBe aware that the slot information in the log message might be symptomatic of a

System (CPU and Backplane) Health CheckAdvanced System Diagnostics and Troubleshooting Guide 81• CPU health check failures might indicate a faulty tra

82 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsTransceiver DiagnosticsThe transceiver diagnostics test the integrity of the manage

Transceiver DiagnosticsAdvanced System Diagnostics and Troubleshooting Guide 83To configure the transceiver diagnostic threshold and window values, us

84 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsViewing Diagnostics ResultsUse the following commands to view information related t

Transceiver DiagnosticsAdvanced System Diagnostics and Troubleshooting Guide 85• CARD_HWFAIL_RR_SCNTRL_REG_TIMEOUT• CARD_HWFAIL_BLIZZARD_REGOP_TIMEOUT

86 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsExample—show diagnostics command (Alpine system). The following example of the sho

Transceiver DiagnosticsAdvanced System Diagnostics and Troubleshooting Guide 87License: Full L3 + Security...SysHealth Check: Enabled. A

88 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsFDB ScanThe FDB scan diagnostic test addresses the possibility of hardware FDB memo

FDB ScanAdvanced System Diagnostics and Troubleshooting Guide 89The failure action that the FDB scan test performs depends on the sys-health-check com

Advanced System Diagnostics and Troubleshooting Guide 9PrefaceThis Preface provides an overview of this guide, describes guide conventions, and lists

90 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsConfiguring the FDB Scan Diagnostics• To set the interval between FDB scans, use th

FDB ScanAdvanced System Diagnostics and Troubleshooting Guide 91Viewing Diagnostics ResultsUse the following commands to view information related to t

92 Advanced System Diagnostics and Troubleshooting GuideDiagnosticsIn the example output of the show diagnostics command, in those slots equipped with

Advanced System Diagnostics and Troubleshooting Guide 936 Additional Diagnostics ToolsThis chapter describes additional diagnostic tools to detect and

94 Advanced System Diagnostics and Troubleshooting GuideAdditional Diagnostics ToolsSystem Impacts of Temperature LoggingThe temperature logging featu

Syslog ServersAdvanced System Diagnostics and Troubleshooting Guide 95Disabling Logging to Remote Syslog Server TargetsTo disable logging to all remot

96 Advanced System Diagnostics and Troubleshooting GuideAdditional Diagnostics ToolsNetwork Impact of the Syslog Server FacilityNetwork impact depends

Cable DiagnosticsAdvanced System Diagnostics and Troubleshooting Guide 97Running Cable DiagnosticsYou can run the CDM tests manually at any time, or y

98 Advanced System Diagnostics and Troubleshooting GuideAdditional Diagnostics ToolsThe disable diagnostics cable command also purges the cable diagno

Cable DiagnosticsAdvanced System Diagnostics and Troubleshooting Guide 99Following is sample detailed diagnostic output from this command:============