You have to differentiate very well between PortFast and BPDU Filtering. They are in their essence two independent things. The PortFast makes your port an edge port - it is allowed to rapidly transition to the Forwarding state. However, a PortFast port still sends and receives BPDU, and should another switch be mistakenly connected to a PortFast-enabled port, the port will lose its PortFast status until disconnected and will behave like any other internal switched port governed by STP.
The BPDU Filter prevents BPDUs from being received and sent through a switchport. Its behavior, however, depends on how it is configured.
If the BPDU Filter is configured directly on a particular port using the spanning-tree bpdufilter enable interface command, the port simply stops sending and receiving BPDUs. It has no effect on whether the port is a PortFast port or not, i.e. it does not result in the port being put into Forwarding state rapidly. The port simply does not send and receive BPDUs, that's all. If the BPDU Filter is configured directly on a port, there is absolutely no relation to PortFast whatsoever.
If the BPDU Filter is configured in the global configuration mode using the spanning-tree portfast bpdufilter default command then it applies only to PortFast-enabled ports. It also behaves differently: whenever a PortFast enabled port comes up, it sends 11 BPDUs. If no BPDUs are received during this period or anytime after it, the port stops sending BDPUs. It, however, permanently listens for BPDUs and should any BPDU arrive, the BPDU Filter will be deactivated on this port until it is disconnected, and the port will start sending and receiving BPDUs just like any other port. Note that in this case, the port was also configured as PortFast, which means that receiving a BPDU will cause the port to lose both PortFast and BPDU Filter.
Just to add something to the two great answers. BPDU filtering essentially disables Spanning-tree on the ports it is configured on so if someone does connect a switch to a port and causes a loop it may not pick that up and would cause issues. If you enable that you must make certain that a device that could cause a loop is not added. A better alternative would be to enable BPDU Guard as that would shut down a port that someone connected a switch that should not be there and would prevent loops.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.