Hey guys ! I'm having a language barrier here with the doc cd and I would like to have your opinion since many people here speak english since they are born ;)
Understanding BPDU Filtering The BPDU filtering feature can be globally enabled on the switch or can be enabled per interface, but the feature operates with some differences. At the global level, you can enable BPDU filtering on Port Fast-enabled interfaces by using the *spanning-tree portfast bpdufilter default* global configuration command. This command prevents interfaces that are in a Port Fast-operational state from sending or receiving BPDUs. The interfaces still send a few BPDUs at link-up before the switch begins to filter outbound BPDUs. You should globally enable BPDU filtering on a switch so that hosts connected to these interfaces do not receive BPDUs.* If a BPDU is received on a Port Fast-enabled interface, the interface loses its Port Fast-operational status, and BPDU filtering is disabled. * At the interface level, you can enable BPDU filtering on any interface by using the *spanning-tree bpdufilter enable* interface configuration command without also enabling the Port Fast feature. This command prevents the interface from sending or receiving BPDUs. Does this means that a portfast only interface will loose his portfast status if a BPDU is received by the switch ? Or if the task requires to cancel the portfast status when hearing a BPDU , you would have to use BPDUFilter with portfast ? Thanks and sorry for this 'dumb' question . -- Nicolas MICHEL Ingenieur Réseaux et Securité (CCNA/CCNP) _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
