I was recently upgrading some firmware on a Cisco 9124e in the back of a Hewlett-Packard c7000 blade chassis. At one stage I lost IP connectivity to the terminal session I was running via the OA.

chassis1-oa1> connect interconnect 4
NOTICE: This pass-thru connection to the integrated I/O console is provided for convenience and does not supply additional access control.  For security reasons, use the password features of the integrated switch.

Error: Connection to integrated switch 4 in use by another user (pid 12267). Press [Enter] or [Return] to continue:

I thought it wouldn’t be a problem to reconnect. It wasn’t quite that simple though, so here’s what I had to do. 

chassis1-oa1> clear interconnect session 4
Session terminated.
chassis1-oa1> connect interconnect 4
NOTICE: This pass-thru connection to the integrated I/O console is provided for convenience and does not supply additional access control.  For security reasons, use the password features of the integrated switch.

Connecting to integrated switch 4 at 9600,N81... Escape character is '<Ctrl>_' (Control + Shift + Underscore)

And then I’m back in my terminal session and ready to continue the firmware upgrade. Hooray.

Press [Enter] to display the switch console: Do you want to continue with the installation (y/n)?  [n] y