Dell PowerSwitch S4128F-ON OS10 Enterprise Edition User Guide Release 10.4.1.0 - Page 214
Enable STP BPDU guard in INTERFACE mode., To clear Error Disabled state
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To clear Error Disabled state: • Use the shutdown command on the interface. • Use the spanning-tree bpdufilter disable command to disable the BPDU guard on the interface. • Use the spanning-tree disable command to disable STP on the interface. 2 Enable STP BPDU guard in INTERFACE mode. spanning-tree bpduguard enable • To shut down the port channel interface, all member ports are disabled in the hardware. • To add a physical port to a port-channel already in the Error Disable state, the new member port is also disabled in the hardware. • To remove a physical port from a port-channel in Error Disable state, the Error Disabled state clears on this physical port (the physical port is enabled in the hardware). To clear Error Disabled state: • Use the shutdown command on the interface. • Use the spanning-tree bpduguard disable command to disable the BPDU guard on the interface. • Use the spanning-tree disable command to disable STP on the interface. 3 Set the guard types to avoid loops in INTERFACE mode. spanning-tree guard {loop | root | none} • loop - Set the guard type to loop. • none - Set the guard type to none. • root - Set the guard type to root. BPDU filter OS10(conf-if-eth1/1/4)# spanning-tree bpdufilter enable OS10(conf-if-eth1/1/4)# do show spanning-tree interface ethernet 1/1/4 ethernet1/1/4 of vlan1 is designated Blocking Edge port:no (default) port guard :none (default) Link type is point-to-point (auto) Boundary: NO bpdu filter : Enable bpdu guard : bpduguard shutdown-on- violation :disable RootGuard: enable LoopGuard disable Bpdus (MRecords) sent 134, received 138 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID ethernet1/1/4 128.272 128 500 BLK 500 32769 90b1.1cf4.a911 128.272 BPDU guard OS10(config)# interface ethernet 1/1/4 OS10(conf-if-eth1/1/4)# spanning-tree bpduguard enable OS10(conf-if-eth1/1/4)# do show spanning-tree interface ethernet 1/1/4 ethernet1/1/4 of vlan1 is designated Blocking Edge port:no (default) port guard :none (default) Link type is point-to-point (auto) Boundary: NO bpdu filter : Enable bpdu guard : bpduguard shutdown-on- violation :enable RootGuard: enable LoopGuard disable Bpdus (MRecords) sent 134, received 138 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID ethernet1/1/4 128.272 128 500 BLK 500 32769 90b1.1cf4.a911 128.272 Loop guard OS10(config)# interface ethernet 1/1/4 OS10(conf-if-eth1/1/4)# spanning-tree guard loop OS10(conf-if-eth1/1/4)# do show spanning-tree interface ethernet 1/1/4 ethernet1/1/4 of vlan1 is root Forwarding Edge port:no (default) port guard :none (default) Link type is point-to-point (auto) 214 Layer 2