General troubleshooting commands

Check ports for errors
show interfaces | include errors

Check the ports for duplex mismatches
show interfaces | include duplex

Check CPU utilization
show processes cpu | exclude 0.00

View the CPU history in graphical format
show processes cpu history

View memory
show memory statistics

View memory history in graphical format
show memory statistics history

View errors & warnings
show log

Clear counters for one interface
clear counters FastEthernet 1/10

Clear counters for all interfaces
clear counters

View port status and VLAN assignment
show interface status

View port utilization
show interfaces counters

View port errors
show interfaces counters errors

View trunking errors
show interfaces counters trunk

Router dump
show tech-support

View Filesystems
dirĀ | dir all

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