Dell S5148F-ON OS10 Enterprise Edition User Guide Release 10.3.2E-R2 - Page 171
Enable spanning-tree BPDU, Cost Bridge ID
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BPDUs using the spanning-tree guard loop command. After BPDUs are received, the port moves out of the Loop-Inconsistent (or blocking) state and transitions to an appropriate state determined by STP. Enabling loop guard on a per port basis enables it on all VLANs configured on the port. If you disable loop guard on a port, it is moved to the Listening state. If you enable BPDU filter and BPDU guard on the same port, the BPDU filter configuration takes precedence. Root guard and loop guard are mutually exclusive. Configuring one overwrites the other from the active configuration. • Enable spanning-tree BPDU filter in INTERFACE mode. Use the spanning-tree bpdufilter disable command to disable the BPDU filter on the interface. spanning-tree bpdufilter enable • Enable spanning-tree BPDU guard in INTERFACE mode. spanning-tree bpduguard enable - Use the shutdown command to shut down the port channel interface, all member ports that are disabled in the hardware. - Use the spanning-tree bpduguard disable command 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. • 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)# exit OS10(config)# interface ethernet 1/1/4 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) Layer 2 171