From: Mounir Mohamed (mounir.mohamed@gmail.com)
Date: Sun Jul 29 2007 - 17:57:21 ART
have toy check that
Rack1SW2(config)#spanning-tree etherchannel guard misconfig
http://www.cisco.com/univercd/cc/td/doc/product/metro/me2400/12225ex/2400scg/swstpopt.htm
BTW it's fine to use interface range while u doing ur ether-channel
configurations, also u can shut the interfaces (using interface range)
while u get ur ether-channel config done then no-shut.
Best Regards,
Mounir Mohamed
On 7/28/07, Djerk Geurts <djerk@djerk.nl> wrote:
>
> I have a 3750 and a 355 and when bringing up an etherchannel I get the
> following on the 3550:
>
> 1d21h: %PM-4-ERR_DISABLE: channel-misconfig error detected on Fa0/23,
> putting Fa0/23 in err-disable state
>
> Same config between a 3550 and 3750 is fine. 3548 - 3750 is fine as well
> as
> is 3548 - 3550. Actually all options between all 4 switches work but this
> one.
>
> Port and eth-chan config:
>
> interface FastEthernet0/22
> description *** C3750-ME F1/0/22 ***
> switchport trunk encapsulation isl
> switchport mode trunk
> channel-group 5 mode on
> End
>
> interface Port-channel5
> description *** C3750 Po5 ***
> switchport trunk encapsulation isl
> switchport mode trunk
> end
>
> Switchport mode has no influence, port-security is off on both sides. What
> is casusing this and how can I troubleshoot this? A debug etherchannel
> doesn't display anything related at all, other than the message listed
> above.
>
> So far I've seen it happen when one side is configured for etherchannel
> and
> the other side isn't but a shut no-shut helps things along nicely once
> both
> sides are configured for etherchannel propperly. But this time it
> doesn't...
>
> Any help appreciated.
>
> Regards,
>
> --
> Djerk Geurts | Senior R&D Engineer | Easynet
> T +31 (0)20 798 98 84 | F +31 (0)20 798 98 99 | www.easynet.com
> Karspeldreef 14 | 1101 CK Amsterdam | The Netherlands
> mailto:djerk.geurts@nl.easynet.net
>
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-- Best Reagrds, Mounir Mohamed
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