Cisco Catalyst 3550

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Catalyst 3550 Multilayer Switch Command Reference
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Chapter 2 Catalyst 3550 Switch Cisco IOS Commands
interface port-channel
interface port-channel
Use the interface port-channel global configuration command to access or create the port-channel
logical interface for Layer 3 routed interfaces. Use the no form of this command to remove the
port-channel.
interface port-channel port-channel-number
no interface port-channel port-channel-number
Syntax Description
Defaults No port-channel logical interfaces are defined.
Command Modes Global configuration
Command History
Usage Guidelines For Layer 2 EtherChannels, you must configure the channel-group interface configuration command,
which automatically creates the port-channel logical interface. You cannot put Layer 2 interfaces into a
manually created port-channel interface.
You create Layer 3 port channels by using the interface port-channel command. You must manually
configure the port-channel logical interface before putting the interface into the channel group.
Only one port channel in a channel group is allowed.
Caution When using a port-channel interface as a routed interface, do not assign Layer 3 addresses on the
physical interfaces that are assigned to the channel group.
Caution Do not assign bridge groups on the physical interfaces in a channel group used as a Layer 3 port-channel
interface because it creates loops. You must also disable spanning tree.
Follow these guidelines when you use the interface port-channel command:
• If you configure Inter-Switch Link (ISL), you must assign the IP address to the switch virtual
interface (SVI).
• If you want to use the CDP, you must configure it only on the physical interface and not on the
port-channel interface.
port-channel-number Port-channel number. The range is 1 to 64.
Release Modification
12.1(4)EA1 This command was introduced.