Cisco Switch

In a switch configuration , fa0/3-4 are configured with trunk and lacp link aggregation.

what's the "interface Port-channel 1" ? Does it create when we issue the "channel-group 1 mode passive" ?

Can it configure fa0/3-4 with the following configuration, without touching the channel-group interface ? Any difference for these two configuration ? Tks

Advised configuration on fa0/3-4
-----------------------------------------------
channel-protocol lacp
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,21-23
channel-group 1 mode passive
switchport mode trunk


current configuration
------------------------------
!
interface FastEthernet0/3
switchport trunk allowed vlan 1,21-23
channel-protocol lacp
channel-group 1 mode passive
switchport mode trunk
!
interface FastEthernet0/4
switchport trunk allowed vlan 1,21-23
channel-protocol lacp
channel-group 1 mode passive
switchport mode trunk
!
interface Port-channel 1
switchport mode trunk
switchport trunk encapsulation dot1q
spanning-tree allowed vlans 1,21-23
!
Switch-Configuration.txt
AXISHKAsked:
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Don JohnstonInstructorCommented:
The port channel interface is automatically created when you issue the channel-group command. It is the virtual interface that the physical interfaces are associated with.

Once the channel is successfully created and functional,  most configuration commands can be issued on the port-channel interface and will then appear on all the physical interfaces associated with that port-channel interface.
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