display spantree backbonefast 443See Also display spantree blockedports on page 444display spantreebackbonefastIndicates whether the STP backbone fast convergence feature is enabledor disabled.Syntax — display spantree backbonefastDefaults — None.Access — All.History —Introduced in MSS Version 3.0.Port-state STP state of the port: Blocking — The port is not forwarding Layer 2traffic but is listening to and forwarding STPcontrol traffic. Disabled — The port is not forwarding any traffic,including STP control traffic. The port might beadministratively disabled or the link might bedisconnected. Forwarding — The port is forwarding Layer 2traffic. Learning — The port is learning the locations ofother WX switches in the spanning tree beforechanging state to forwarding. Listening — The port is comparing its own STPinformation with information in STP controlpackets received by the port to compute thespanning tree and change state to blocking orforwarding. STP Off—STP is disabled on the port.Cost STP cost of the port.Prio STP priority of the port.Portfast State of the uplink fast convergence feature: Enabled DisabledTable 69 Output for display spantree (continued)Field Description