Some of our favorite commands to use on the Adtran NetVanta 1238, 1550 etc switches and routers
show mac address-table – shows the MAC address, VLAN ID, and port for each device in the table.
no events – turns off the console logging while you are using command line
show interface <interface name> realtime – show realtime statistics on the port you are troubleshooting
show processes CPU -shows the processes and how much CPU they use. If CPU is maxed out (due to broadcast storm for example), the switch will have slow or intermittent Ping response and you may need to console directly.