switchport mode trunk
!-- 2950 switches only support 802.1q encapsulation, which is the configured automatically
!-- when trunking is enabled on the interface by issuing the switchport mode trunk command.
!-- Note: The channel-group command is introduced in IOS 12.1. IOS 12.0 has the port group command
!-- to configure channeling.
interface FastEthernet0/2
switchport mode trunk
channel-group 1 mode on
interface FastEthernet0/3
switchport mode trunk
channel-group 1 mode on
interface FastEthernet0/4
switchport mode trunk
channel-group 1 mode on
interface Port-channel1
switchport mode trunk