Re: Etherchannel misconfig guard

Steve Shaw wrote:
> Here's an older doc for CatOS but the same scenario and behavior still
> applies to IOS:
>
> http://www.cisco.com/en/US/tech/tk389/tk213/technologies_tech_note09186a008009448d.shtml
>
>
>
> On Mon, Nov 23, 2009 at 8:44 AM, Dimitar Mojsovski
> <dimitar.mojsovski_at_gmail.com <mailto:dimitar.mojsovski_at_gmail.com>> wrote:
>
> Syed Moazzam Daimi wrote:
>
> Hi Dimitar,
> Etherchannel mis-config guard works only for
> Etherchannel configured in ON mode as you are forcefully
> configuring
> etherchannel in ON mode.
>
> If there is any misconfig like below, etherchannel protocol
> would take care of the port from participating in channel.
> SW1 (3 ports) ======etherchannel
> ON mode=======(2ports)SW2
> (stp root) Ideally its a
> mis-config on SW2 as only 2 ports are in the etherchannel
> instead of 3 ports. If you have configured STP Etherchannel
> misconfig guard, which would detect and see the STP bpdu's
> from SW1 to SW2 seen on channel/non-channel ports and would
> put the ports into error-disabled state to avoid any misconfigs.
> Also see,
> http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SXF/native/configuration/guide/stp_enha.html#wp1020683
> HTH
> Syed Moazzam Daimi
> CCIE # 22100
>
>
> I think I get it now :-)
> Thanks for your explanations !
>
>
>
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Hi Steve,

What you sent is a very interesting reading.
It's actualy describing exactly what I am trying to do. Switch A not
channeling and Switch B channeling.
 From what it says, 75 BPDUs from different MAC addresses in 30sec
should trigger the detection and send it to err-disable ?

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Received on Mon Nov 23 2009 - 16:38:49 ART