Unrechable Servers

I just got started with runlevels and some servers are unreachable. What could be the problem and how do I tackle it?

Kindly clarify more about which servers are unreachable and please provide us with a screenshot to help you properly.

Attached is an example whereby I try to ssh and the route is unreachable.

Hello, @gitauwairimu
We have set up the environment according to the task and that’s LBR server not app server. App server are app01, app02 and app03. So definitely SSH won’t work in this case.
You can find more details from this page.