From: S Malik (ccie.09@gmail.com)
Date: Mon Oct 06 2008 - 12:35:09 ART
Thanks folks, I think we are on the same page.
On Mon, Oct 6, 2008 at 10:59 AM, Osamah Shaheen <ShaheenO@maaden.com.sa>wrote:
> In addition, The root guard ensures that the port on which root guard is
> enabled is the designated port. Normally, root bridge ports are all
> designated ports, unless two or more ports of the root bridge are connected
> together. If the bridge receives superior STP Bridge Protocol Data Units
> (BPDUs) on a root guard-enabled port, root guard moves this port to a
> root-inconsistent STP state. This root-inconsistent state is effectively
> equal to a listening state. No traffic is forwarded across this port. In
> this way, the root guard enforces the position of the root bridge.
>
> This message appears after root guard blocks a port:
>
> %SPANTREE-2-ROOTGUARDBLOCK: Port 1/1 tried to become non-designated
> in VLAN 77.
> Moved to root-inconsistent state
>
>
> ________________________________
>
> From: nobody@groupstudy.com on behalf of S Malik
> Sent: Mon 06/10/2008 05:14 PM
> To: Edouard Zorrilla
> Cc: Gary Duncanson; nouman abbasi; Cisco certification
> Subject: Re: BPDU
>
>
>
> Can some one verify please, I guess bpdu-filter will silently drop bpdu
> pkts
> if confgured on interface not globally.
> BPDU-guard will put interface in err-disable mode if configured globbally.
>
>
> On 10/6/08, Edouard Zorrilla <ezorrilla@tsf.com.pe> wrote:
> >
> > BPDU-Filter : it will silently drop the BPDU packets.
> >
> > BPDU-Guard : Put on ErrDisable one interface which receive BPDU packets.
> >
> > Regards
> >
> > ----- Original Message ----- From: "Gary Duncanson" <
> > garyduncanson@btinternet.com>
> > To: "nouman abbasi" <abbasi.nouman@gmail.com>
> > Cc: "Cisco certification" <ccielab@groupstudy.com>
> > Sent: Monday, October 06, 2008 5:41 AM
> > Subject: Re: BPDU
> >
> >
> > Wendall Odom's CCIE Routing and Switching guide.
> >> pp82
> >>
> >> STP sanity for your network in the event someone adds rogue switches to
> >> your infrastructure.
> >>
> >> HTH
> >>
> >> G
> >> ----- Original Message ----- From: "nouman abbasi" <
> >> abbasi.nouman@gmail.com>
> >> To: "Cisco certification" <ccielab@groupstudy.com>
> >> Sent: Sunday, October 05, 2008 11:43 PM
> >> Subject: BPDU
> >>
> >>
> >> Hi,
> >>> What is the difference between BPDU-Filter // BPDU-Guard //
> ErrDisable??
> >>> A practical Scenario when it can used??
> >>>
> >>> Regards
> >>>
> >>>
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