The interfaces still send a few BPDUs at link-up before the switch begins to filter outbound BPDUs. This command prevents interfaces that are in a Port Fast-operational state from sending or receiving BPDUs.
The BPDU filtering feature can be globally enabled on the switch or can be enabled per interface, but the feature operates with some differences.Īt the global level, you can enable BPDU filtering on Port Fast-enabled interfaces by using the spanning-tree portfast bpdufilter default global configuration command. A trap is sent only if you configure the port to shut down during a security violation. An SNMP trap will not be sent if you have configured the port for restrictive violation mode. When a security violation occurs, the Link LED for that port turns orange, and a link-down trap is sent to the Simple Network Management Protocol (SNMP) manager. The restrictive mode allows you to configure the port to remain enabled during a security violation and drop only packets that are coming in from insecure hosts The default behavior during a security violation is for the port to shut down permanently. The shutdown mode is further configurable by specifying whether the port will be permanently disabled or disabled for only a specified time. In the event of a security violation, you can configure the port to go into shutdown mode or restrictive mode. Q.what does "SWITCHPORT PORT-SECURITY VIOLATION SHUTDOWN" do? Ports do not converts to topology, they cahnge their state depending own STP Topology i.e change in the network Q.Does it convert Portfast to STP Topology again? PortFast BPDU filtering allows the administrator to prevent the system from sending or even receiving If configuration BPDUs are received on the PortFast-enabled port, the port either loses its PortFast status (or is manually shut down if BPDU guard is configured), or it ignores the BPDUs, depending on how you configure BPDU Filter.Ĭonfiguring BPDU Filter so that all configuration BPDUs received on a port are dropped can be useful for service provider environments, where a service provider provides Layer 2 Ethernet access for customers You can configure a feature called BPDU Filter, which prevents a PortFast-enabled port from sending configuration BPDUs. Any connected device receives and might process configuration BPDUs unnecessarily. If you enable PortFast on a port, by default that port still generates configuration BPDUs. Here i tried to give you possible answers to your questions.Please let me know if you have any further queries?