Dell Force10 MXL Blade MXL 10/40GbE Switch IO Module FTOS Command Line Referen - Page 528
spanning-tree rstp edge-port Command Example, Usage, Information, Example, Syntax
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www.dell.com | support.dell.com Usage Information The BPDU guard option prevents the port from participating in an active STP topology in case a BPDU appears on a port unintentionally, or is mis-configured, or is subject to a DOS attack. This option places the port into an error disable state if a BPDU appears, and a message is logged so that the administrator can take corrective action. Note: A port configured as an edge port on an RSTP switch, immediately transitions to the Forwarding state. Only ports connected to end-hosts should be configured as edge ports. Consider an edge port similar to a port with a spanning-tree portfast enabled. If you do not enable the shutdown-on-violation command, BPDUs are still sent to the CPU. You cannot enable STP root guard and loop guard at the same time on a port. For example, if you configure loop guard on a port on which root guard is already configured, the following error message is displayed: % 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 a blocking state and prevents traffic from flowing through it. For example, when Portfast BPDU guard and loop guard are both configured: • If a BPDU is received from a remote device, BPDU guard places the port in an Err-Disabled blocking state and no 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 state and no traffic is forwarded on the port. Example Figure 28-7. spanning-tree rstp edge-port Command Example FTOS(conf)#interface tengigabitethernet 4/0 FTOS(conf-if-tengig-4/0)#spanning-tree rstp edge-port FTOS(conf-if-tengig-4/0)#show config ! interface TenGigabitEthernet 4/0 no ip address switchport spanning-tree rstp edge-port no shutdown FTOS# tc-flush-standard Enable the MAC address flushing after receiving every topology change notification. Syntax tc-flush-standard To disable, use the no tc-flush-standard command. Defaults Disabled Command Modes Command History CONFIGURATION Version 8.3.16.1 Introduced on MXL 10/40GbE Switch IO Module 528 | Rapid Spanning Tree Protocol (RSTP)