[hint taken from Brian Dennis’s CoD]
Suppose you are using a term server to login to all your routers. And you’re on R1. You SSH to R4. How do you go back to R1? See below:
[Resuming connection 1 to r1 … ]
Rack1R1#ssh -l CISCO 22.214.171.124
<—-now you want to go back to R1, how would you do it? If you press, CTRL+SHIFT+6+x, you’d go back to the term server, not to R1!
Rack1R4> [press CTRL+SHIFT+6+x]
So to go back to R1 (the intermediate router), you’d have to press, CTRL+SHIFT+6+6+x, this would get you back to R1
Rack1R4> [press CTRL+SHIFT+6+6+x]
Hope this helps!