For all of you who keep posting this, I posted the configs earlier in the thread. ALL THE MEMBERS WERE SET AS DYNAMIC DESIRABLE. NONE were set as access ports. I had them all shutdown when I configured the channel-group and yes I used the interface range. They initially all negotiated as trunks. Then for whatever reason one would become an access port and un-bundle. Then a bit later it would trunk again. I know I can manually set it as a trunk but I was restricted due to other lab requirements. Specifically the task asks for an exact show int trunk output that indicates it should be set to dynamic.
Removing and re-applying the exact same channel-group command seemed to stabilize the etherchannel, so I don't know what the actual issue was but it appears it was some sort of "glitch". 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 Mon, Nov 21, 2011 at 10:08 AM, Dwann Hall <[email protected]> wrote: > I think others have answered but the problem and its resolution are > included in the error message. The etherchannel members must be the > same. For whatever reasone one interface is operating in access mode > while the other is in trunking mode. Do a "sh int f0/x switchport".I > would manually set switchport mode and not rely on dtp. -d > > On Sun, Nov 20, 2011 at 7:49 PM, mark salmon <[email protected]> wrote: >> I agree, defaulting both physical ports (also deleting the port channel) >> then re configuring both using the range command. It appears one of the >> physical ports is set for dynamic desirable and the other is hard coded to >> trunk unconditionally. >> >> "Question with boldness even the existence of a God; because, if there be >> one, he must more approve of the homage of reason, than that of blind-folded >> fear." Thomas Jefferson >> " Where ignorance is bliss 'tis folly to be wise" >> >> >> ________________________________ >> From: JM NGOK <[email protected]> >> To: Adam Booth <[email protected]>; marc abel <[email protected]> >> Cc: "[email protected]" <[email protected]> >> Sent: Sunday, November 20, 2011 6:45 PM >> Subject: Re: [OSL | CCIE_RS] Ether-channel error >> >> Shutdown these ports and delete the port-channel interface. Paste Adam's >> configuration ,reconfigure the port-channel and bring these interfaces up. >> >> Am I wrong? >> >> Jean-Marie NGOK >> Senior Network Engineer >> >> >> >> ________________________________ >> From: Adam Booth <[email protected]> >> To: marc abel <[email protected]> >> Cc: [email protected] >> Sent: Sunday, November 20, 2011 3:50 PM >> Subject: Re: [OSL | CCIE_RS] Ether-channel error >> >> 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 >> _______________________________________________ >> 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
