Re: bpdugaurd feature on Glabal configuration

From: Shine (shinejoseph@iprimus.com.au)
Date: Tue Feb 27 2007 - 05:30:09 ART

So what's the real advantage of enabling bdpuguard on global config?

This document says configuration of bdpu in the global config:
http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800
9482f.shtml#topic3

Thanks,
Shine
  ----- Original Message -----
  From: Narbik Kocharians
  To: Prashant Shukla
  Cc: Shine ; ccielab@groupstudy.com
  Sent: Tuesday, February 27, 2007 7:10 PM
  Subject: Re: bpdugaurd feature on Glabal configuration

  That's BPDUFilter and not BPDUGuard. IF the command is used at the global
level, it's enabled on Port fast enabled interfaces, the command is as
follows:

  Spanning-tree portfast bpduguard default

  With BPDUGuard, if the port receives a BPDU, it transitions into errdisable
mode. There are basically couple things that you can do to bring the port back
to it's normal (forwarding) state, Shut and no shut, or configure the port to
automatically recover every so many seconds, as follows:

  errdisable recovery cause bpduguard
  errdisable recovery inerval 300

  In this case the port will automatically recover every 5 minutes (300
seconds) and if it sees another BPDU, it will transition into errdisable mode,
and the cycle repeats itself.

  On 2/26/07, Prashant Shukla <shukla_cisco@yahoo.co.in> wrote:
    Hey Shine,

    Per my understanding, BDPU guard of the config mode works in tandem with
portfast and when a portfast enabled interface receives a BPDU the port is
transitioned back to the normal "non-portfast" state and goes back to
listening/learning etc modes.

    HTH

    Shukla.
    Shine <shinejoseph@iprimus.com.au> wrote: Hi GS,

    Is there any advantages on enabling the bpduguard feature on a per
interface
    basis rather than in global configuration? Can anyone give me some lights
to
    it?

    Thanks you,
    Shine

    _______________________________________________________________________
    Subscription information may be found at:
    http://www.groupstudy.com/list/CCIELab.html

    ---------------------------------
    Heres a new way to find what you're looking for - Yahoo! Answers

    _______________________________________________________________________
    Subscription information may be found at:
    http://www.groupstudy.com/list/CCIELab.html

  --
  Narbik Kocharians
  CCIE# 12410 (R&S, SP, Security)
  CCSI# 30832
  Network Learning, Inc. (CCIE class Instructor)
  www.ccbootcamp.com (CCIE Training)

This archive was generated by hypermail 2.1.4 : Thu Mar 01 2007 - 07:38:48 ART