spanning-tree edgeport

Enables the edge port on an interface to allow the interface to quickly transition to the forwarding state.

Syntax

spanning-tree edgeport [ bpdu-guard ]
no spanning-tree edgeport [ bpdu-guard ]

Command Default

Edge port is disabled.

Parameters

bpdu-guard
Guards the port against the reception of BPDUs.

Modes

Interface subtype configuration mode

Usage Guidelines

This command is only for RSTP and MSTP. Use the spanning-tree portfast command for STP

Note the following details about edge ports and their behavior:
  • A port can become an edge port if no BPDU is received.
  • A port must become an edge port before it receives a BPDU.
  • When an edge port receives a BPDU, it becomes a normal spanning-tree port and is no longer an edge port.
  • Because ports directly connected to end stations cannot create bridging loops in the network, edge ports directly transition to the forwarding state, and skip the listening and learning states

Examples

To enable a port to quickly transition to the forwarding state: 

device# configure terminal
device(config)# interface ethernet 1/5 
device(conf-if-eth-1/5)# spanning-tree edgeport

To guard the port against reception of BPDUs: 

device# configure terminal
device(config)# interface ethernet 1/5 
device(conf-if-eth-1/5)# spanning-tree edgeport 
device(conf-if-eth-1/5)# spanning-tree edgeport bpdu-guard
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