First question is what WRichey asked. What type of switch are you plugged into and what port. uplink, standard, Auto uplink?

Are you getting a link light on the switch when you plug it in?

Have you hard coded a port to be 100mb full duplex or is it auto negotiate.

some times there is a problem with negotiation between switches.

Next would be how many switches do you have plugged into the one down stairs already?

5 or more/ 5 or less.

In some intances it can cause issues.


All In One Communications
Mustang, OK