IOS Troubleshooting tools

show A snapshot of what is occurring to monitor status. The show commands enable you to detect neighbors, spot performance issues, and isolate problems.
ping Determine end-to-end connectivity and reachability.
traceroute Hop-by-hop approach to finding the problem.
log Monitor and view messages that record real-time events, such as errors, warnings, and state transitions.
debug Use for troubleshooting traffic flow or misconfigurations; not for normal daily operations.

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