Spanning Tree Enhancements
Cisco has some proprietary enhancements to Spanning Tree that help speed
up network convergence. They include:
�¡ PortFast
�¡ UplinkFast
�¡ BackboneFast
Portfast
Portfast is for access (user) ports only. It causes the port to bypass the
STP listening and learning states and transition directly to forwarding.
Connecting a switch to a Portfast port can cause loops to develop.
(config-if)#spanning-tree portfast