A loop can make a switch receive the same broadcast frames on two different ports, and alternately associate the sending MAC address with one or the other port.OverviewA switching loop or bridge loop occurs in when there is more than one path between two endpoints (e.g. multiple connections between two or two ports on the same switch con. In the case of broadcast packets over a switching loop, the situation may develop into a. In a very simple example, a switch with three ports A, B, and C has a normal connected t. Switching loops can cause misleading entries in a switch's (MAC) database and can cause endless unicast to be broadcast throughout the network. A loop can make a switch receive the.