network cisco ccna gns3 certification arteq

network cisco ccna gns3 certification arteq
a network runs through it

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Monday, January 23, 2012

you're out of your tree...

a disabled port does not participate in spanning tree; it is either administratively down, or faulty... it does not block,  it is down

a blocked port is participating in spanning tree; it blocks, yet receives bpdu's

a port moves to the listening state when determined it has the potential to forward; it is transitioning.  it is not
   sending or receiving frames, and like blocking it is receiving bpdu's but it is not sending bpdu's; it is
   transitioning to the learning state

a port transitions from listening to learning before it gets to forwarding.  in the learning state the port is now
   adding mac's to it's table. it is one step closer to forwarding.  if it loses its potential, it will revert to blocking.

forwarding... the port has made it to the show after the requisite delays in the tranistory states.  it is adding mac addresses to its table, it is sending and receiving frames and bpdu's... it is in the big's...

spanning tree, i do love thee...

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