The SAP edge-port command is used to reduce the time it takes a SAP to reach the forwarding state when the SAP is on the edge of the network, and therefore has no further STP bridge to handshake with.
The edge-port command is used to initialize the internal OPER_EDGE variable. At any time, when OPER_EDGE is false on a SAP, the normal mechanisms are used to transition to the forwarding state (see Forward delay). When OPER_EDGE is true, STP assumes that the remote end agrees to transition to the forwarding state without actually receiving a BPDU with an agreement flag set.
The OPER_EDGE variable is dynamically set to false if the SAP receives BPDUs (the configured edge-port value does not change). The OPER_EDGE variable is dynamically set to true if auto-edge is enabled and STP concludes there is no bridge behind the SAP.
When STP on the SAP is administratively disabled, and re-enabled, the OPER_EDGE is re-initialized to the value configured for edge-port.
Valid values for SAP edge-port are enabled and disabled, with disabled being the default.
CLI syntax:
config>service>vpls>sap>stp#
[no] edge-port