Issues with Layer 1 Redundancy: MAC Database Instability
▪ If there is more than one path for the frame to be forwarded out, an
endless loop can result.
▪ Ethernet frames do not have a Time to Live (TTL) attribute.
▪ Frames on a switched network, they continue to propagate
between switches endlessly.
▪ This continued propagation between switches can result in MAC
database instability.