Yes they do.

Cat1
________________________

interface FastEthernet0/23
 switchport trunk encapsulation dot1q
 switchport mode dynamic desirable
 channel-group 12 mode active
!
interface FastEthernet0/24
 switchport trunk encapsulation dot1q
 switchport mode dynamic desirable
 channel-group 12 mode active
!


Cat2
___________________________

interface FastEthernet0/23
 switchport trunk encapsulation dot1q
 switchport mode dynamic desirable
 channel-group 12 mode active
!
interface FastEthernet0/24
 switchport trunk encapsulation dot1q
 switchport mode dynamic desirable
 channel-group 12 mode active
!

On Sun, Nov 20, 2011 at 2:50 PM, Adam Booth <[email protected]> wrote:
> Hi Marc,
>
> Do Fa0/23 and Fa0/24 have the same configurations?  For example is one port
> switch access for instance, with the other able to negotiate a trunk using
> DTP?
>
> Perhaps look at hard setting the interfaces to what you want
>
> switchport trunk encapsulation dot1q
> switchport mode trunk
> switchport nonegotiate
>
> Cheers,
> Adam
>
> On Mon, Nov 21, 2011 at 5:54 AM, 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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