Re: Etherchannel misconfig guard

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> 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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Received on Mon Nov 23 2009 - 09:21:09 ART