interface Port-channel1
 description Core
 switchport trunk allowed vlan 10
 switchport trunk encapsulation dot1q
 switchport mode trunk
!
interface GigabitEthernet0/0
 description Core1 ge-0/0/2
 switchport trunk allowed vlan 10
 switchport trunk encapsulation dot1q
 switchport mode trunk
 negotiation auto
 channel-group 1 mode active
!
interface GigabitEthernet0/1
 description Core2 ge-0/0/2
 switchport trunk allowed vlan 10
 switchport trunk encapsulation dot1q
 switchport mode trunk
 negotiation auto
 channel-group 1 mode active
!