PART $6$: CONFIGURING SPANNING TREE PROTOCOL

While Spanning Tree Protocol is enabled on the switches by default, there are things we can

optimize to make it better:

Change spanning$-$tree to the Rapid per VLAN STP mode

Enabling PortFast allows edge ports to enter the spanning tree forwarding state

immediately, bypassing the listening and learning states

And PortFast BPDU guard prevents loops by moving a non trunking port into an

errdisable state when a BPDU is received on that port.

Finally, you will configure S$1,$ S$2,$ and S$3$ as the primary and secondary STP root

bridges for designated VLANs

$6\mathrm{.}1$ Change Spanning Tree Protocol

By default, the switch uses the Per$-$VLAN Spanning Tree protocol. Change spanning tree to

the Per$-$VLAN Rapid STP mode.

$6\mathrm{.}2$ Configure PortFast and BPDU guard

Configure the following Spanning Tree settings to optimize the network:

Enable Portfast by default on all access ports on all three switches

This will improve connectivity time to computers wired to the network port; it is

especially important if the network is using DHCP

Enable bpdu guard by default on all Portfast ports

This will ensure that if someone connects a rogue switch to your network, the port

will be put into err$-$disabled mode