Hot answers tagged switch
What you are describing is what happens when a switch's CAM table is full, where it can no longer learn MAC address and it forwards packets out every port. It might be hard to figure out if this is the problem with an unmanaged switch, but with a managed switch you should be able to display the CAM table. What also would help in this question is a diagram ...
Only top voted, non community-wiki answers of a minimum length are eligible