Cisco switch command

Switchone(config) # Spanning-tree portfast bpdufilter default       

Should the answer be B.

A. If an interface is enabled for portfast receives BDPU, the port goes through the spanning-tree listening, learning, and forwarding states.       
B. If an interface is enabled for portfast receives BDPU, the port does not go through the       spanning-tree listening, learning, and forwarding states.       
C. If an interface is enabled for portfast receives BDPU, the port is shut down immediately.       
D. If an interface is enabled for portfast receives BDPU, the port goes into the spanning-tree inconsistent state.
AXISHKAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Zacharia KurianAdministrator- Data Center & NetworkCommented:
The answer is A as per the below link;

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3560/software/release/12-2_55_se/configuration/guide/3560_scg/swstpopt.html#wp1046220

The reason;

“spanning-tree portfast bpdufilter default” command enables BPDU filtering on Portfast-enabled interfaces. This command prevents interfaces that are in a Portfast-operational state from sending BPDUs. If a BPDU is received on a Port Fast-enabled interface, the interface loses its Portfast-operational status, and BPDU filtering is disabled.

Zac.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
AXISHKAuthor Commented:
Tks
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Switches / Hubs

From novice to tech pro — start learning today.