bpduguard

From: mike chambo (mchambo98@yahoo.com.hk)
Date: Wed Jan 03 2007 - 09:41:07 ART

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Question:
  Enable Portfast on interfaces g1/0/12 thru g1/0/16.
  Make sure that the switch will shut down any of these interfaces if it receives a BPDU on one of them.

  Solution provided:

  int ran g1/0/12 - 16
  spanning-tree portfast
  spanning-tree bpduguard enable

  this seems logical but my reading or my confusion seems to lead me to believe that:

   if portfast is enabled on the interface, then you don't need to activate bpduguard on the same interface; enter spanning-tree portfast bpduguard default (a global command) instead.

  That is:
  globally enter:
  spanning-tree portfast bpduguard default

  and at the Interface level:

  Interface range g1/0/12 - 16
  spanning-tree portfast

  or simply enter:

  int ran g1/0/12 - 16
  spanning-tree bpduguard enable

  Michael Chambo

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