Now we're going to see what happens to these rude ports,
these designated ports
and the ports that have nothing on top off them.
So poor one and pour two on switch for have neither designated no poor tree and port one on switch for have neither designated or root port on top of him.
wins, which is power off.
And as spanning tree is converging.
Initially, all ports are put in blocking
in blocking. No data traffic is being forwarded. Ofcourse, bpd use are being sent because spanning tree is converging
and this date lasts for 20 seconds. Next
you move over to listening
and during listening, you are sending and receiving bpd use
and you're rude. Bridge election is happening and your route port election is happening
and you're listening. Stage last for 15 seconds.
This 15 seconds. This 15 2nd timer is also known as the spanning tree for delay.
Then the port is transition to what is called a learning.
The learning state also
last 15 seconds, and this timer is also called for delay.
So both these timers are called forward delay
there is no data traffic flowing, but the switch is still populating its Mac address table.
What happens when a destination address does not exist in the Mac address table for a switch and the switch is signed before the frame to a particular Mac address. The switch floods the frame.
to reduce flooding. Once the switches do, start forwarding data traffic. You take these 15 seconds to populate the Mac address table as much as possible to reduce flooding once forwarding starts.
And after 15 seconds off
learning spent in learning the switch, start forwarding data traffic.
Now designated ports
and root ports are put in forging.
So this is designated fording,
now non designated port
or alternate ports. In Cisco's vernacular, these are called alternate ports.
So poor three switch four is an alternate port
and pour one switch for is an alternate port because these provide an alternate packs to the route bridge.
Or you could call them non designated non route ports. These are put in blocking,
this link is shut down
and kind of running out of space. This link is
So have me at this point stopped the loop.
Can I have a loop this way now?
because this sport is blocking.
this way or this way? No, because this port is blocking.
And that concludes the spanning three decision making process and spanning three convergence.