Problem establishing Connection on the LAN

Hi everybody i need your help on this I have LAN which run Sun microsystem with solaris 7 OS on each of the servers. The LAN was working fine before an interruption of power supply which makes servers to operating as standalone servers. i.e none of the servers have access to one another. How do i resolve this pls?

Make sure the switch is still good.

Hi guys thank you all for your help. I have checked all the switches and at the end i was able to trace the faulty one after isolating it the connection was established successfully. So thanks alot and keep the good work of helping brothers out.