In this article we will discuss RSTP Edge Ports, will make brief discussion on RSTP Edge Ports, In last article we discuss about RSTP BPDUs.
An RSTP edge port is a switch port that is never intended to be connected to another switch. It immediately transitions to the forwarding state when enabled.
The RSTP edge port concept corresponds to the PVST+ PortFast feature. An edge port is directly connected to an end station and assumes that no switch device is connected to it. RSTP edge ports should immediately transition to the forwarding state, thereby skipping the time-consuming original 802.1D listening and learning port states.
The Cisco RSTP implementation (Rapid PVST+) maintains the PortFast keyword, using the spanning-tree portfast command for edge port configuration. This makes the transition from STP to RSTP seamless.
Configuring an edge port to be attached to another switch is not recommended. This can have negative implications for RSTP because a temporary loop may result, possibly delaying the convergence of RSTP.
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