MAC Table Instability

Multiple frame copies
MAC Table Instability
Another problem is that of MAC table instability. Because the switch can receive frames from
a single MAC address on different ports (due to frames looping), the MAC table is constantly
being updated to reflect the new “location” of the course host. The result is that frames may not
be forwarded out of the correct interface, causing data to be lost, resulting in retransmission and
extra load on the network.
To solve these three problems, the Spanning Tree Protocol (STP) was developed