Troubleshooting guide

Advanced System Diagnostics and Troubleshooting Guide 5
Contents
The Role of Processes to Monitor System Operation 55
Power On Self Test (POST) 56
Related Commands 56
Configuring the Boot-Up Diagnostics 56
Runtime (On-Demand) System Diagnostics 57
Runtime Diagnostics on “i” Series Systems 57
Related Commands 58
Running the Diagnostics on BlackDiamond Systems 58
Runtime Diagnostics on “i” Series Alpine and Summit Systems 58
System Impact of Running the Diagnostics on “i” Series Switches 59
Runtime Diagnostics on “e” Series Systems 59
Related Commands 60
Running the Diagnostics on Summit “e” Switches 60
System Impact of Running the Diagnostics on Summit “e” Series Switches 60
Automatic Packet Memory Scan (via sys-health-check) 60
Memory Scanning and Memory Mapping Behavior 61
Limited Operation Mode 64
Effects of Running Memory Scanning on “i” Series Switches 64
Summit, Alpine, or BlackDiamond with a Single MSM 64
BlackDiamond System with Two MSMs 64
Interpreting Memory Scanning Results 66
Per-Slot Packet Memory Scan on BlackDiamond Switches 67
Related Commands 67
Configuring the Packet Memory Scan Recovery Mode 67
System Impact of Per-Slot Packet Memory Scanning 68
Network Impact of Per-Slot Packet Memory Scanning 68
System (CPU and Backplane) Health Check 70
Health Check Packet Types 70
Backplane Health Check States 70
Related Commands 71
Health Check Functionality 71
Alarm-Level Response Action 71
Auto-Recovery Response Action 71
Backplane Health Check 72
Viewing Backplane Health Check Results—show log Command 72
Viewing Backplane Health Check Diagnostic Results—show diagnostics Command 73
Analyzing the Results 78
CPU Health Check 79
Viewing CPU Health Check Results—show log Command 79
Viewing CPU Health Check Diagnostic Results—show diagnostics Command 80
Analyzing the CPU Health Check Results 80
Transceiver Diagnostics 82
Usage Guidelines 82
Related Commands 82
Configuring the Transceiver Diagnostics 82