Skillset can help you prepare! Sign up for your free Skillset account and take the first steps towards your certification.
An operational PortFast receives a BPDU and automatically disables the port, what can be causing the issue?
The switch is globally configured with Root Guard feature.
The switch is filtering the BPDUs with BPDU filter function.
The port is configured with BPDU Guard and instead of a Server or a host-computer, somebody has inadvertently plugged in a network cable from another switch running STP
The port is configured as a trunk port.
The feature PortFast can be enabled on any port on the switch however; it is aimed only for ports connected to end-user devices. A PortFast will transition to STP forwarding state as soon as the interface comes up, bypassing listening and learning states. If the port is accidentally plugged into another switch "through a trunk link", a loop can be created. Port Fast should be enabled with BPDU Guard so that when the port receives a BPDU, the port will be shut down to prevent a loop. For more information refer to: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4000/8-2glx/configuration/guide/stp_enha.html
Study thousands of practice questions that organized by skills and ranked by difficulty.
Create a tailored training plan based on the knowledge you already possess.
Know when you’re ready for the high-stakes exam. Have the confidence that you will pass on your first attempt.