Using the APIC troubleshooting tools

Updated: April 15, 2026

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introduces the tools and methodology commonly used to troubleshoot problems. These tools can assist you with monitoring traffic, debugging, and detecting issues such as traffic drops, misrouting, blocked paths, and uplink failures.

The tools listed below provides the overview of the tools described in this chapter:

ACL Contract Permit and Deny Logs—Enables the logging of packets or flows that were allowed to be sent because of contract permit rules and the logging of packets or flows dropped because of taboo contract deny rules.
Atomic Counters—Enables you to gather statistics about traffic between flows for detecting drops and misrouting in the fabric and for enabling quick debugging and isolation of application connectivity issues.
Digital Optical Monitoring—Enables you to view digital optical monitoring (DOM) statistics about a physical interface.
Health Scores—Enables you to isolate performance issues by drilling down through the network hierarchy to isolate faults to specific managed objects (MOs).
Port Tracking—Enables you to monitor the status of links between leaf switches and spine switches for detecting uplink failure.
SNMP—Simple Network Management Protocol (SNMP) enables you to remotely monitor individual hosts (APIC or another host) and find out the state of any particular node.
SPAN—Switchport Analizer (SPAN) enables you to perform detailed troubleshooting or to take a sample of traffic from a particular application host for proactive monitoring and analysis.
Statistics—Provides real-time measures of observed objects. Viewing statistics enable you to perform trend analysis and troubleshooting.
Syslog—Enables you to specify the minimum severity level of messages to be sent, the items to be included in the syslog messages, and the syslog destination. The format can also be displayed in NX-OS CLI format.
Traceroute—Enables you to find the routes that packets actually take when traveling to their destination.
Troubleshooting Wizard—Enables administrators to troubleshoot issues that occur during specific time frames, which can be designated by selecting two endpoints.
Configuration Sync Issues—Enables you to see if any transactions in Cisco APIC have not yet synched.

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