1st go into Port-channel
int port-channel 1
Enable switch port
switchport
Move into ports to
add
interface gi1/1
Enable as switch port and add to port channel
switchport
channel-group 1 mode ?
active Enable LACP
unconditionally
auto
Enable PAgP only if a PAgP device is detected
desirable
Enable PAgP unconditionally
on
Enable Etherchannel only
passive
Enable LACP only if a LACP device is detected
channel-group 1 mode active
interface gi1/2
switchport
channel-group 1 mode active
Move to Port-channel
and enable dot1q encapsulation and trunk mode
int port-channel 1
switchport trunk encapsulation
dot1q
switchport mode trunk
add vlans to trunk
switchport trunk allowed vlan 1-5
no shutdown ports
Cisco-6503(config)#int port-channel 1
Cisco-6503(config-if)#no shut
Cisco-6503(config-if)#int gi1/1
Cisco-6503(config-if)#no shut
Cisco-6503(config-if)#int gi1/2
Cisco-6503(config-if)#no shut
interface Port-channel1
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
no shut
interface GigabitEthernet1/1
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
channel-group 1 mode on
no shut
interface GigabitEthernet1/2
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
no ip address
channel-group 1 mode on
no shut
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Please add comments so I may update the material to accommodate platform modification to various commands. Also if you have some real-world caveats, do please share.