DELL N3000 User Manual

Configuring the Spanning Tree Protocol

Of the four switches in Figure 22-19, the administrator decides that Switch A 

is the most centrally located in the network and is the least likely to be moved 

or redeployed. For these reasons, the administrator selects it as the root bridge 

for the spanning tree. The administrator configures Switch A with the highest 

priority and uses the default priority values for Switch B, Switch C, and 

Switch D.
For all switches, the administrator also configures ports 4–17 in Port Fast 

mode because these ports are connected to hosts and can transition directly 

to the Forwarding state to speed up the connection time between the hosts 

and the network.