CISCO Undocumented Commands

Catalyst 4000

Hardware Troubleshooting

show nvramenv 1 (hidden)
sh interposition 1 (hidden)
These are hidden commands, meaning they cannot be parsed with a "?" and you cannot Tab to complete. Type the command out in its entirety. This output may or may not be useful in solving your case. These commands are undocumented, and therefore the TAC engineer is not required to explain the output to the customer.

Step 7 - Although fairly rare, memory leaks do occur and can cause what seem naturally to be poor performance and other symptoms. If you have not been able to track down any reason for performance issues on the switch in the previous steps mentioned, capture the output of the following command, as well as the other commands in the preceding steps, and open a case with the Cisco TAC :
show mbuf total (hidden)