Chapter2Cisco IOS Commands for the Catalyst 4500 Series Switches
interface port-channel
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Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
78-16201-01
interface port-channel
To access or create a port channel interface, use the interface port-channel command.
interface port-channel channel-group
Syntax Description
Defaults This command has no default settings.
Command Modes Global configuration
Command History
Usage Guidelines You do not have to create a port channel interface before assigning a physical interface to a channel
group. A port channel interface is created automatically when the channel group gets its first physical
interface, if it is not already created.
You can also create port channels by entering the interface port-channel command. This will create a
Layer 3 port channel. To change the Layer 3 port channel into a Layer 2 port channel, use the switchport
command before you assign physical interfaces to the channel group. A port channel cannot be changed
from Layer 3 to Layer 2 or vice versa when it contains member ports.
Only one port channel in a channel group is allowed.
Caution The Layer 3 port channel interface is the routed interface. Do not enable Layer 3 addresses on the
physical FastEthernet interfaces.
If you want to use CDP, you must configure it only on the physical Fast Ethernet interface and not on
the port-channel interface.
Examples This example creates a port channel interface with a channel group number of 64:
Switch(config)# interface port-channel 64
Switch(config)#
Related Commands channel-group
show etherchannel
channel-group Port channel group number; valid values are from 1 to 64.
Release Modification
12.1(8a)EW Support for this command was introduced on the Catalyst 4500 series switch.
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