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Beginner

spanning-tree portfast bpdufilter default

Hello , 

 

I want to know the effect on applying the above command globally , 

because I read that it makes any port that have portfast that receives bpdu goes through normal STP stages  ( listening , learning , forwarding )

which means that it basically disables portfast .... is that true ?

2 REPLIES 2
VIP Advisor

Re: spanning-tree portfast bpdufilter default

Hi

This command prevents portfast interfaces to send and receive bpdus. However, if a bpdu is received on a portfast interface, it will transition to normal stp operational status and disable bpdu filtering on this specific interface.


Thanks
Francesco
PS: Please don't forget to rate and select as validated answer if this answered your question
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Beginner

Re: spanning-tree portfast bpdufilter default

Hi,

That command does 2 complementary actions, first, puts all ports on "Portfast", that means that the port does not goes thru the STP process (Blocking, Listen, Learning, Forwarding) but it goes directly to forwarding, but it keeps receiving and sending BPDUs.  SO, theres the second part, it puts "BPDU Filter" on all the ports, that means that the port will stops receiving and sending those BPDUs.