Block 2 - 2b

Root Ports

ports that are permitted to forward on non-root bridge switches

Listening Port State

will process BPDUs to decide on the STP toplogy that it is connected to. It will not populate the MAC address table of the switch port and will not forward frames that contain data from nodes on the network

Broadcast Storm

The result of one or more devices sending a nonstop flurry of broadcast frames on the network.

Forwarding Port State

After initial listening and learning states, normal operation of the switch is now occurring

Learning Port State

After initial listening, begin populating the MAC address table with the source MAC address of any frames received on the interface

Designated Ports

All non-root ports that are still permitted to forward traffic on the network.

Forwarding State

An STP port in the forwarding state is considered part of the active topology.

Blocking State

In this state, the switch is not sending data out of the ports. However, the switch is receiving and monitoring the BPDUs. This state is used to prevent any possible switching loops.

Broadcast Frames are a problem on a network without...

Loop Avoidance

What can Listening Port State do?

Receive and Send BPDUs

What can Learning Port State do?

Receive, Send, and Update MAC Table

What can Forwarding Port State do?

Receive, send, update MAC Table, and send/receive Frames

What can Blocking Port State do?

Recievce BPDUs

Blocking Port State

STP has determined the possibility of a loop exists should the switchport be allowed to forward frames

STP

Spanning Tree Protocol. Protocol enabled on most switches that protects against switching loops.

Root Bridge

The single bridge on a network selected by the Spanning Tree Protocol to provide the basis for all subsequent path calculations.

Network Loop

a condition that occurs when there is more than one network path between two hosts and the information is unable to locate the destination

Disabled Port State

administratively shut down

How does STP work?

asses multiple paths that exist between the switch and another switch to prioritize one switchport and designates traffic for Forward state and disallows forwarding to Blocking state

Broadcast Frames

frames that have a destination address of FFFF.FFFF.FFFF. when using a variety of protocols

Bridge Protocol Data Unit (BPDU)

frames which are sent out by switches that contain relevant information to STP and are sent out every two seconds by default