Spanning-Tree Protocol

From Mycomputer Notes

Spanning Tree Protocol (STP)

STP is a bridged protocol that utilizes the spanning tree alogarithm, enabling a learning bridge to dynamically work around loops in a network topology by creating a spanning tree

Spanning-Tree port States

Blocking

Recevies BDPUs only

Listenning

Building an Active topology

Learning

Building a bridging table

Fowarding

Sending and Receiving Data

Disabled

Administratively down.

[edit] Selecting Root bridge

By default the Root bridge is the one with the lowest MAC address but this can be manupulated by the administrator by changing the Root Priority. The command to used is

Switch#config term
Switch(config)# spanning-tree vlan1 priority <0-65, 535> | default <32,768>