From: A Murty (a.murty@tcs.com)
Date: Mon Jul 30 2007 - 02:15:39 ART
Hi All,
Best thing to do before configuring the port channel is to shut the ports
and configure on both sides and un shut thereafter.
Beware "Dont forget to unshut after you finish ur configuration"
Regards
Murty
"Mounir Mohamed" <mounir.mohamed@gmail.com>
Sent by: nobody@groupstudy.com
07/30/2007 02:50 AM
Please respond to
"Mounir Mohamed" <mounir.mohamed@gmail.com>
To
"Jonny English" <redkidneybeans@gmail.com>
cc
"Djerk Geurts" <djerk@djerk.nl>, "Cisco certification"
<ccielab@groupstudy.com>
Subject
Re: Etherchannel & err-disable
I beleive the interfaces going to err-disable mode when there is only one
side configured by channel-group X mode on, due to STP issue, when you
enable ether-channel all Ether-channel members sending traffic which
casued
in the err-disable.
On 7/30/07, Jonny English <redkidneybeans@gmail.com> wrote:
>
> Etherchannel in on mode will cause the link to go into err-disable.
>
> Like if you have two sides of an etherchannel in on mode and you reload
> switch A, switch B's etherchannel ports that are in on mode will go into
> err-disable.
>
> This doesn't happen with the other modes.
>
> Correct me if I am wrong, but i had this issue when i did an after hours
> change from work.
>
>
> On 7/29/07, 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
> >
> > Please consider the environment before printing this e-mail.
> >
> >
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