Administrator Guide

10/40 Gbps Interfaces in Port Channels
When both 10/40 interfaces GigE interfaces are added to a port channel, the interfaces must share a common speed. When
interfaces have a configured speed different from the port channel speed, the software disables those interfaces.
The common speed is determined when the port channel is first enabled. At that time, the software checks the first interface
listed in the port channel configuration. If you enabled that interface, its speed configuration becomes the common speed of the
port channel. If the other interfaces configured in that port channel are configured with a different speed, the system disables
them.
Configuration Tasks for Port Channel Interfaces
To configure a port channel (LAG), use the commands similar to those found in physical interfaces. By default, no port channels
are configured in the startup configuration.
These are the mandatory and optional configuration tasks:
Creating a Port Channel (mandatory)
Adding a Physical Interface to a Port Channel (mandatory)
Reassigning an Interface to a New Port Channel (optional)
Configuring the Minimum Oper Up Links in a Port Channel (optional)
Adding or Removing a Port Channel from a VLAN (optional)
Assigning an IP Address to a Port Channel (optional)
Deleting or Disabling a Port Channel (optional)
Load Balancing Through Port Channels (optional)
Creating a Port Channel
You 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 mode
interface port-channel id-number
2. Ensure that the port channel is active.
INTERFACE PORT-CHANNEL mode
no shutdown
After you enable the port channel, you can place it in Layer 2 or Layer 3 mode. To place the port channel in Layer 2 mode use
the switchport command, or configure and IP address to place the port channel in Layer 3 mode.
NOTE: L3 is not supported on port extender (PE) ports or on port-channels when they have PE ports as members.
You can configure a port channel as you would a physical interface by enabling or configuring protocols or assigning access
control lists.
Adding a Physical Interface to a Port Channel
The physical interfaces in a port channel can be on any line card in the chassis, but must be the same physical type.
You can add any physical interface to a port channel if the interface configuration is minimal. You can configure 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 the physical
interfaces if they are part of a port channel.
428 Interfaces