NOTE: A port configured as an edge port, on an RSTP switch, immediately transitions to theForwarding state. Only configure ports connected to end-hosts as edge ports. Consider an edge portsimilar to a port with a spanning-tree portfast enabled.If you do not enable shutdown-on-violation, BPDUs are still sent to the RPM CPU.You cannot enable STP root guard and loop guard at the same time on a port. For example, if you configure loopguard on a port on which root guard is already configured, the following error message displays: % Error:RootGuard is configured. Cannot configure LoopGuard.Enabling Portfast BPDU guard and loop guard at the same time on a port results in a port that remains in aBlocking state and prevents traffic from flowing through it. For example, when Portfast BPDU guard and loopguard are both configured:• If a BPDU is received from a remote device, BPDU guard places the port in an Err-Disabled Blocking state andno traffic is forwarded on the port.• If no BPDU is received from a remote device, loop guard places the port in a Loop-Inconsistent Blocking stateand no traffic is forwarded on the port.Example Dell(conf)# interface tengigabitethernet 1/1/4/1Dell(conf-if-te-1/1/4/1)# spanning-tree rstp edge-portDell(conf-if-te-1/1/4/1)# show config!interface TenGigabitEthernet 1/1/4/1no ip addressswitchportspanning-tree rstp edge-portno shutdownDell#tc-flush-standardEnable the MAC address flushing after receiving every topology change notification.Syntax tc-flush-standardTo disable, use the no tc-flush-standard command.Defaults DisabledCommand Modes CONFIGURATION (conf-rstp)Command History This guide is platform-specific. For command information about other platforms, see the relevant Dell NetworkingOS Command Line Reference Guide.Version Description9.10(0.0) Introduced on the S6100-ON.9.8(1.0) Introduced on the Z9100-ON.9.8(0.0P5) Introduced on the S4048-ON.9.8(0.0P2) Introduced on the S3048-ON.9.7(0.0) Introduced on the S6000-ON.9.2(1.0) Introduced on the Z9500.9.0.2.0 Introduced on the S6000.Rapid Spanning Tree Protocol (RSTP) 1373
