Hello Nicholas, Did you read (extensive) blog I wrote on this subject about a month ago?
-- Marko Milivojevic - CCIE #18427 Senior Technical Instructor - IPexpert FREE CCIE training: http://bit.ly/vLecture Mailto: [email protected] Telephone: +1.810.326.1444 Web: http://www.ipexpert.com/ On Thu, Jan 20, 2011 at 16:56, Nicolas MICHEL <[email protected]> wrote: > 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 > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com
