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Beginner

STP portfast

Hi

 

I read that if portfast port receives a BPDU port will lose its portfast feature.

But in my below test port  keeps  porfast even if it receives a BPDU,

can anyone help me to clarify this?stp portfast.PNG

 

Thanks

Siva

2 ACCEPTED SOLUTIONS

Accepted Solutions
Highlighted
Hall of Fame Expert

Re: STP portfast

Hello Siva,

you have STP portfast enabled on the root port connecting to another switch.

 

The exact behaviour depends on how you have configured spanning-tree portfast

global mode

spanning-tree portfast default

 

vs. interface mode

int  gi0/1

spanning-tree portfast enable

 

One of the two configurations (the first one I suppose) should react changing the port to standard the second one should keep the port in STP portfast mode.

 

Hope to help

Giuseppe

 

View solution in original post

Advocate

Re: STP portfast

Hi @sivam siva ,

 

Review this discussion:

https://learningnetwork.cisco.com/message/153796#153796

 

I think it is very informative.

 

Regards

View solution in original post

2 REPLIES 2
Highlighted
Hall of Fame Expert

Re: STP portfast

Hello Siva,

you have STP portfast enabled on the root port connecting to another switch.

 

The exact behaviour depends on how you have configured spanning-tree portfast

global mode

spanning-tree portfast default

 

vs. interface mode

int  gi0/1

spanning-tree portfast enable

 

One of the two configurations (the first one I suppose) should react changing the port to standard the second one should keep the port in STP portfast mode.

 

Hope to help

Giuseppe

 

View solution in original post

Advocate

Re: STP portfast

Hi @sivam siva ,

 

Review this discussion:

https://learningnetwork.cisco.com/message/153796#153796

 

I think it is very informative.

 

Regards

View solution in original post

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