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886 Views 5 Replies Latest reply: May 4, 2012 3:36 AM by Lorenzo RSS

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BPDU Guard issue....

Jan 22, 2012 10:02 AM

Jimmy Sands 644 posts since
May 7, 2009

I was trying to understand bpduguard, I put fa0/1 on SW1 as spanning-portfast, never went down.  I put bpduguard on int, never went down, I sh/no shut the int and got this:

 

*Mar  1 01:39:21.943: %SPANTREE-2-BLOCK_BPDUGUARD: Received BPDU on port Fa0/1 with BPDU Guard enabled. Disabling port.

*Mar  1 01:39:21.943: %PM-4-ERR_DISABLE: bpduguard error detected on Fa0/1, putting Fa0/1 in err-disable state

 

Why did it take a sh/no shut to bring about this error?

 

 

 

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