Creating a Port ChannelYou can create up to 128 port channels with 16 port members per group on the switch.To configure a port channel, use the following commands.1 Create a port channel.CONFIGURATION modeinterface port-channel id-number2 Ensure that the port channel is active.INTERFACE PORT-CHANNEL modeno shutdownAfter you enable the port channel, you can place it in Layer 2 or Layer 3 mode. To place the port channel inLayer 2 mode use the switchport command, or configure and IP address to place the port channel in Layer3 mode.NOTE: L3 is not supported on port extender (PE) ports or on port-channels when they have PE ports asmembers.You can configure a port channel as you would a physical interface by enabling or configuring protocols orassigning access control lists.Adding a Physical Interface to a Port ChannelThe physical interfaces in a port channel can be on any line card in the chassis, but must be the same physicaltype.You can add any physical interface to a port channel if the interface configuration is minimal. You canconfigure only the following commands on an interface if it is a member of a port channel:• description• shutdown/no shutdown• mtu• ip mtu (if the interface is on a Jumbo-enabled by default)NOTE: A logical port channel interface cannot have flow control. Flow control can only be present on thephysical interfaces if they are part of a port channel.NOTE: The switch supports jumbo frames by default (the default maximum transmission unit (MTU) is9216 bytes). To configure the MTU, use the mtu command from INTERFACE mode.To view the interface’s configuration, enter INTERFACE mode for that interface and use the show configcommand or from EXEC Privilege mode, use the show running-config interface interfacecommand.When an interface is added to a port channel, the system recalculates the hash algorithm.Interfaces 516
