1. Edge
Port
1.1 Basic Concepts
On a switch running STP, after a designated port goes up, it needs to enter the
Listening state (15s) and Learning state (15s), before transitioning to the
Forwarding state to forward data frames.
Generally, no loop will occur on the port connecting a switch to a PC. The port
can directly enter the Forwarding state to forward data frames, improving the
working efficiency. You can configure the port as an edge port. An edge port
does not participate in spanning tree calculation. It can transition to the Forwarding
state immediately after being activated. In addition, whether an edge port is
Up or Down does not trigger the STP topology change that will cause the generation
of TC BPDUs.
If BPDU protection is not configured, an edge port becomes an ordinary port once
receiving BPDUs.
1.2 Configuration and
Implementation
This function can be enabled on STP-enabled switch's ports connecting to terminals.
To learn more:
Enhancing STP and Configuring STP Protection Functions part 2
Enhancing STP and Configuring STP Protection Functions part 3
Enhancing STP and Configuring STP Protection Functions part 4
Thank you! 
