This is a bit of random oddness I stumbled upon this morning.
I was working on a Cisco Catalyst 2960 switch and
needed to know which MAC addresses the device had learned on a particular
interface. The usual way to do this is with the
show mac-address-table interface command. While I was typing I hit the
get additional option information. This is the response I got back from the CLI:
% Unrecognized command
I use this command at least three times a week, so I'm pretty sure it's
show mac-address-table command is definitely not on the list
show commands the CLI claims are available. On a lark, I went ahead and
show mac-address-table and IOS was kind enough to return the 1,627 MAC
addresses this switch had learned. Bizarre.
According to the Cisco documentation for Cisco IOS Release 12.2(40)SE, the
show mac-address-table command is on the list of commands that "appear when you
enter the question mark (?) at the Catalyst 2960 switch prompt but are not
Interestingly enough, that's the exact opposite of the behavior displayed by the device!
At this point, I'm willing to chalk it up to random morning oddness and move on.