The problem i face is that every 3-4 days this kind of router does not let me connect to it via telnet. I tried also via a switch which is directly connected with it but nothing. If i do not restart it , nothing happen.
Your posted output shows that you have configured "exec-timeout 0 0", which will keep the session (no timeout) unless you explicitly exit and terminate it (you can see that one of your sessions is 4 days ago), try configuring "exec-timeout 5 0", this will automatically terminate the session after 5 min idle, and you shouldn't face such problems again.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...