Here are a few of the more helpful commands that I have been using recently to troubleshoot some performance issues we have been having with our our stacked S4820’s.

1)Show interfaces statistics:
‘show interface tengigabitethernet 0/40’

2)Monitor interface statistics in real-time:
‘monitor interface tengigabitethernet 0/40’

3)Show port channel statistics:
‘show interface port-channel7’

4)Show overview of port channel groupings:
‘show interface port-channel brief’

5)Monitor port channel statistics in real-time:
‘monitor interface port-channel 12’

6)Display vlan interfaces statistics:
‘show interface vlan 20’

7)Gather data for tech support:
‘show tech-support’

8)Display serial numbers, service tags, etc:
‘show inventory’