I joined a new company this week where I noticed that one always on setup has listener ip configured, while the other doesn't. For the AG setup which doesn't have the listener in it, will the applications connect to the cluster ip address? Can i add the listener at this point of time? What are the HA options if Listener is not present?
First two screenshots show one AG setup without the listener
For the AG setup with the listner and the fileshare witness