I have a 3 Com 2226 switch in another building. It is connected by fiber. I can ping the switch its self from the building that I am in, but I cannot ping devices on the other side of the switch in the other building. From the devices in the other building on the other side of the switch I can ping devises in this building. Other communication including VOIP phones are working fine. I have looked in the Web interface of the 2226, but have on found anything that would prevent a ping.
Antivirus is running on the computers that I cannot ping, but those computers have the same settings in the Antivirus software as computers in this building that I can ping.