Check the show interface trunk output on both switches, there is a good chance that f0/23 is not trunking.
Cheers, Donald Robb Productive Networks / Network Consultant ______________________________________________________________ CCIE Written, CCIP, CCSP, CCDP, CCNP, CCNA: Voice, JNCIP, SCP, MCSA 2003, Security+, CCSE.R65, PACE Experts-Exchange: Guru R&S -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of marc abel Sent: Sunday, November 20, 2011 1:58 PM To: Adam Booth Cc: [email protected] Subject: Re: [OSL | CCIE_RS] Ether-channel error 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 >> _______________________________________________ >> For more information regarding industry leading CCIE Lab training, >> please visit www.ipexpert.com >> >> Are you a CCNP or CCIE and looking for a job? Check out >> www.PlatinumPlacement.com >> >> To Unsubscribe from this list please visit the following link and >> follow the directions to unsubscribe. >> http://onlinestudylist.com/mailman/listinfo/ccie_rs > > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com To Unsubscribe from this list please visit the following link and follow the directions to unsubscribe. http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com To Unsubscribe from this list please visit the following link and follow the directions to unsubscribe. http://onlinestudylist.com/mailman/listinfo/ccie_rs
