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Etherchanel error

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Last Modified: 2014-05-05
Hi,

When Core port gi7/15 enable it creat a loop...help me

Data closet

interface GigabitEthernet1/0/1
 description Etherchannel 1 to CORE1
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 150,199,210,215,220-222,999
 switchport mode trunk
 switchport nonegotiate
 channel-group 1 mode desirable
end


interface GigabitEthernet1/0/2
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 150,199,210,215,220-222,999
 switchport mode trunk
 switchport nonegotiate
 channel-group 1 mode desirable
end

Gi1/0/1   Etherchannel 1 to  connected    trunk      a-full a-1000 1000BaseSX SFP
Gi1/0/2                      notconnect   trunk        auto   auto 1000BaseSX SFP

___________________________________________

Core



interface GigabitEthernet4/15
 description Etherchannel to Onco1
 switchport
 switchport trunk encapsulation dot1q
 switchport mode trunk
 channel-group 24 mode on
end

interface GigabitEthernet7/15
 description Etherchannel to Onco1
 switchport
 switchport trunk encapsulation dot1q
 switchport mode trunk
 shutdown
 channel-group 24 mode on
end

Gi4/15       Etherchannel to On connected    trunk        full   1000 1000BaseSX
Gi7/15       Etherchannel to On disabled     1            full   1000 1000BaseSX

______________________________________________________________________

Error on Core

Apr 30 10:24:23.937 ADT: %EC-SP-5-DONTBNDL: Gi7/15 suspended: incompatible partner port with Gi7/15
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