Do

sh int switchport | b Fa0/23         <--output for ports 23 and 24
show run int Fa0/23
show run int Fa0/24
sh int trunk | i Port|Fa0/2[34]
show etherchan summary


On Sun, Nov 20, 2011 at 8:54 PM, marc abel <[email protected]> wrote:

> I have two dynamic desirable trunks configured as an ether-channel and
> one keeps un-bundling
>
> Nov 20 19:49:06.347: %EC-5-CANNOT_BUNDLE2: Fa0/23 is not compatible
> with Fa0/24 and will be suspended (trunk mode of Fa0/23 is access,
> Fa0/24 is trunk)
> Nov 20 19:49:07.335: %LINEPROTO-5-UPDOWN: Line protocol on Interface
> FastEthernet0/23, changed state to down
>
>
> It then comes back up and everything seems fine for a bit and then it
> happens again. Any idea what the issue could be or how to
> troubleshoot? Obviously I could configure them as statically trunking
> but a lab requirement prevents this.
>
> Thank you,
>
> Marc
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