5.5 Redundant Links
5.5.4 Configuring fast EtherChannel
Enter the following command to verify that a line card is capable of being channeled on a set command-based switch:

Switch> (enable) show port capabilities [mod_num[/port_num]]

Make sure that the ports you want to channel are configured correctly. As you can see in Figure , the output of this command will tell you what ports can be grouped together. Create a channel on the desired ports by entering the following command:

Switch> (enable) set port channel mod_num/ports  on | off | auto | desirable.

An example of this command is shown in Figure .  As shown,  Ports 2/3 and 2/4 are bundled together.

To enable an EtherChannel bundle on a Cisco IOS Software-based switch, enter the following command on each interface that will be grouped together:

Switch(config-if)#port group group number distribution |destination / source|

An example of this is shown in Figure .  As shown,  FastEthernet interfaces 0/3 and 0/4 are bundled together.

Interactive Lab Activity  (Flash, 303 kB)
  In this activity, you will learn how to configure a full duplex Fast EtherChannel trunk between a Catalyst 2900 and Catalyst 4000.
Lab Activity
  In this lab activity, you will achieve more bandwidth between Ethernet switches by combining two 100 megabit links together forming a full-duplex 200-megabit link.