Corporate network?

Question

Computer networks

In two buildings, a Cisco 2811 router is installed, before this an optical switch and on Cisco 3 managed switches are connected to port 24. Often lost connection between computers that are installed on different buildings. We ping one computer to the server "exceeded", if we disable and re-enable the network environment and after that we ping again normally, after an hour it still does not ping?

Answer 1

Hire a network administrator who can travel to your location.
What you are asking is not a question, it is a task that requires you to come to the site, look at the network, check the connection, check the load. Through questions and answers on the site, given your poor knowledge of the language, it is unlikely that something will come out good.