• Interfaces with portfast enabled that come up will go to forwarding mode immediately, the interface will skip the listening and learning state.
• A switch will never generate a topology change notification for an interface that has portfast enabled.
https://networklessons.com/switching/cisco-portfast-configuration
This link explains it better
https://networklessons.com/switching/cisco-portfast-configuration#:~:text=Portfast%20does%20two%20things%20for%20us%3A%201%20,notification%20for%20an%20interface%20that%20has%20portfast%20enabled.
Cisco Learning Network > CCNA Certification Community: portfast
Post by Elvin Arias Soto
"The Portfast feature is used on access ports to bypass the listening and learning states of STP, meaning that a port shoud inmediately go to forwarding state, note that a Portfast enabled port also do not generate Topology Change Notifications (TCNs).
The reason why the port is not going to forwarding is becuase Portfast has two variants, one for access ports and one for trunks. In order to enable Portfast on trunk ports you should enter the "spanning-tree portfast trunk" command on interface mode.
..."
Portfast does two things for us: Interfaces with portfast enabled that come up will go to forwarding mode immediately, the interface will skip the listening and learning state. A switch will never generate a topology change notification for an interface that has portfast enabled.
https://networklessons.com/switching/cisco-portfast-configuration
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
vannplus11
Highly Voted 3 years, 4 months agocheckoboy88
Highly Voted 1 year, 10 months agoCCNA_Bro
Most Recent 2 weeks, 3 days agoCCNA_Bro
2 weeks, 3 days agoibo95
5 months, 2 weeks agobymrdas
9 months, 2 weeks agoKuyaErik101
10 months ago[Removed]
10 months, 2 weeks agoVanessaR05
10 months, 3 weeks agosquagmire
11 months agokyleptt
1 year, 4 months agoKene01
1 year, 5 months agomfaria
1 year, 5 months ago[Removed]
1 year, 6 months agoJorro99404
1 year, 8 months agoTarek70
1 year, 9 months agoCiscoman021
2 years agomzu_sk8
2 years, 2 months ago