Dell N3200-ON EMC Networking N-Series Switches CLI Reference Guide version 6.7 - Page 848

A port enabled for BPDU filtering does not receive or send any BPDUs. It is possible that a network loop may result if BPDU filtering is enabled on a port connected to anything other than an end system. BPDU filtering is appropriate for configuration on portfast enabled interfaces that are connected to end system hosts where it is desired to not send BPDUs to the host or receive BPDUs from the host. Use the BPDU guard capability if it is desired to obtain a greater level of protection from rogue hosts or possible spanning-tree loops. The administrator must ensure that interfaces enabled for BPDU filtering are configured as edge ports. Use the spanning-tree portfast command to configure the interface as an edge port. Example The following example discards BPDUs received on spanning-tree ports in portfast mode. console(config)#spanning-tree portfast bpdufilter default spanning-tree portfast default Use the spanning-tree portfast default command to enable portfast mode on access ports. Interfaces configured as access mode ports are considered to be edge ports. Use the no form of this command to disable portfast mode on all ports. Syntax spanning-tree portfast default no spanning-tree portfast default Default Configuration Portfast mode is disabled by default. Command Mode Global Configuration mode User Guidelines This command only affects access ports. Layer 2 Switching Commands 848