Hardware manual

interface port-channel
Interface Commands IR-117
Note If you do not assign a static MAC address on the port-channel interface, the Cisco IOS
software automatically assigns a MAC address. If you assign a static MAC address and then later
remove it, the Cisco IOS software automatically assigns a MAC address.
Caution With Release 11.1(20)CC, the Fast EtherChannel supports CEF/dCEF. We recommend that you
clear all explicit ip route-cache distributed commands from the Fast Ethernet interfaces before enabling
dCEF on the port-channel interface. Doing this gives the port-channel interface proper control of its physical
Fast Ethernet links. When you enable CEF/dCEF globally, all interfaces that support CEF/dCEF are enabled.
When CEF/dCEF is enabled on the port-channel interface, it is automatically enabled on each of the Fast
Ethernet interfaces in the channel group. However, if you have previously disabled CEF/dCEF on the Fast
Ethernet interface, CEF/dCEF is not automatically enabled. In this case, you must enable CEF/dCEF on the
Fast Ethernet interface.
Example
The following example creates a port-channel interface with a channel group number of 1 and adds
three Fast Ethernet interfaces to port-channel 1:
Router(config)# interface port-channel 1
Router(config-if)# ip address 1.1.1.10 255.255.255.0
Router(config)# interface fastethernet 1/0/0
Router(config-if)# channel-group 1
Router(config)# interface fastethernet 4/0/0
Router(config-if)# channel-group 1
Router(config)# interface fastethernet 5/0/0
Router(config-if)# channel-group 1
Related Commands
You can use the master indexes or search online to find documentation of related commands.
channel-group
show interfaces port-channel