Cisco Nexus 9000 Series

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Using syslog 106

Logging Levels 107

Enabling Logging for Telnet or SSH 107

Using SPAN 108

Using the Blue Beacon Feature 108

Using the watch Command 108

Additional References for Troubleshooting Tools and Methodology 109

Cisco Nexus 9000 Series NX-OS Troubleshooting Guide, Release 7.x

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Contents

Main Page

Default Chapter3
- Table of Contents3
Preface9
- Audience9
- Document Conventions9
- Related Documentation for Cisco Nexus 9000 Series Switches10
- Documentation Feedback10
- Obtaining Documentation and Submitting a Service Request11
C H a P T E13
New and Changed Information13
C H a P T E15
- Verifying Ports16
- Verifying Layer 2 Connectivity16
- Verifying Layer 3 Connectivity17
- Symptoms17
  - System Messages18
  - Syslog Server Implementation18
- Troubleshooting with Logs20
- Troubleshooting Modules20
- Viewing NVRAM Logs20
- Contacting Customer Support21
Overview15
- Software Image15
- About the Troubleshooting Process15
Troubleshooting Installations, Upgrades, and Reboots23
- About Upgrades and Reboots23
- Upgrade and Reboot Checklist23
- Verifying Software Upgrades24
- Verifying a Nondisruptive Upgrade24
- Troubleshooting Software Upgrades and Downgrades25
  - Software Upgrade Ends with Error25
  - Upgrading the Cisco NX-OS Software25
- Troubleshooting Software System Reboots26
Troubleshooting Licensing Issues45
- About Troubleshooting Licensing Issues45
- Guidelines and Limitations for Licensing45
- Initial Troubleshooting Checklist for Licensing46
- Displaying License Information Using the CLI46
- Licensing Installation Issues47
Troubleshooting Ports49
- About Troubleshooting Ports49
- Guidelines and Limitations for Troubleshooting Ports49
- Initial Port Troubleshooting Checklist50
- Viewing Port Information50
- Troubleshooting Port Statistics from the CLI51
- Troubleshooting Port-Interface Issues51
Troubleshooting Vpcs57
- About Troubleshooting Vpcs57
- Initial Troubleshooting Vpcs Checklist57
- Chapter57
- Verifying Vpcs Using the CLI58
- Received Type 1 Configuration Element Mismatch59
- Cannot Enable the Vpc Feature60
- Vpcs in Blocking State60
- Vlans on a Vpc Moved to Suspend State60
- Hosts with an HSRP Gateway Cannot Access Beyond Their VLAN61
Troubleshooting Vlans63
- About Troubleshooting Vlans63
- Guidelines and Limitations for Troubleshooting Vlans63
- Initial Troubleshooting Vlans Checklist64
- Troubleshooting VLAN Issues65
Troubleshooting STP67
- About Troubleshooting STP67
- Initial Troubleshooting STP Checklist67
- Troubleshooting STP Data Loops68
- Troubleshooting Excessive Packet Flooding71
- Troubleshooting Convergence Time Issues72
- Securing the Network against Forwarding Loops72
Chapter 9 Troubleshooting Routing75
- About Troubleshooting Routing Issues75
- Initial Troubleshooting Routing Checklist75
- Troubleshooting Routing76
- Troubleshooting Policy-Based Routing79
C H a P T E81
Troubleshooting Memory81
- About Troubleshooting Memory81
- General/High Level Assessment of Platform Memory Utilization82
- User Processes82
  - Determining Which Process Is Using a Lot of Memory83
- Built-In Platform Memory Monitoring83
  - Memory Thresholds83
Troubleshooting Packet Flow Issues85
- Packet Flow Issues85
  - Packets Dropped Because of Rate Limits85
  - Packets Dropped Because of Copp85
C H a P T E87
Troubleshooting Poweron Auto Provisioning87
- Switch Does Not Come up in Time for POAP to Complete87
- POAP Fails87
Troubleshooting the Python API89
- Receiving Python API Errors89
C H a P T E93
Troubleshooting NX-API93
- NX-API Guidelines93
- NX-API Is Not Responding93
- Configuration Fails94
- Permission Is Denied for Bash94
- Output Cannot be Retrieved from the Browser Sandbox94
- CLI Command Errors Are Appearing94
- Error Messages Are Appearing94
- Temporary Files Are Disappearing95
- Chunks of the Command Output Are Not Being Delivered95
C H a P T E97
Troubleshooting Service Failures97
- Identifying Memory Allocations for Processes97
- Identifying CPU Utilization for Processes98
- Monitoring Process Core Files99
- Processing the Crash Core Files99
- Clearing the Core99
- Enabling Auto-Copy for Core Files100
C H a P T E101
Before Contacting Technical Support101
- Steps to Perform before Calling TAC101
- Copying Files to or from Cisco NX-OS103
- Using Core Dumps104
Troubleshooting Tools and Methodology105
- Command-Line Interface Troubleshooting Commands105
  - Consistency Checker Commands106
- Configuration Files107
- CLI Debug107
  - Debug Filters108
- Ping and Traceroute108
  - Using Ping108
  - Using Traceroute109
- Monitoring Processes and Cpus110
  - Using the Show Processes Cpu Command111
  - Using the Show System Resources Command112
- Using Onboard Failure Logging112
- Using Diagnostics113
- Using Embedded Event Manager114
- Using Ethanalyzer114
- SNMP and RMON Support116
- Using the PCAP SNMP Parser116
- Using RADIUS118
- Using Syslog118
  - Logging Levels119
  - Enabling Logging for Telnet or SSH119
- Using SPAN120
- Using the Blue Beacon Feature120
- Using the Watch Command120
- Additional References for Troubleshooting Tools and Methodology121
- Cisco Nexus 9000 Series NX-OS Troubleshooting Guide, Release121

Cisco Nexus 9000 Series - Page 8

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