Cisco Systems 7600 manual 12-7, Routerconfig# interface port-channel, Port-channel groupnumber

Chapter 12 Configuring EtherChannels

Configuring EtherChannels

Serious traffic problems can result if an EtherChannel forms from ports that pass data through the switch in significantly different ways. For example, ports on modules with and without DFCs, or when enabled with the no mls qos channel-consistencyport-channel interface command, ports that have significantly different QoS port parameters (buffers sizes and queue types). Be prepared to disable such EtherChannels.

Configuring EtherChannels

These sections describe how to configure EtherChannels:

•Configuring Port Channel Logical Interfaces for Layer 3 EtherChannels, page 12-7

•Configuring Channel Groups, page 12-8

•Configuring EtherChannel Load Balancing, page 12-11

•Configuring the EtherChannel Min-Links Feature, page 12-12

Note Make sure that the LAN ports are configured correctly (see the “EtherChannel Feature Configuration Guidelines and Restrictions” section on page 12-5).

Configuring Port Channel Logical Interfaces for Layer 3 EtherChannels

	Note	• When configuring Layer 2 EtherChannels, you cannot put Layer 2 LAN ports into manually created
		port channel logical interfaces. If you are configuring a Layer 2 EtherChannel, do not perform the
		procedures in this section (see the “Configuring Channel Groups” section on page 12-8).
		• When configuring Layer 3 EtherChannels, you must manually create the port channel logical
		interface as described in this section, and then put the Layer 3 LAN ports into the channel group (see
		the “Configuring Channel Groups” section on page 12-8).
		• To move an IP address from a Layer 3 LAN port to an EtherChannel, you must delete the IP address
		from the Layer 3 LAN port before configuring it on the port channel logical interface.
		To create a port channel interface for a Layer 3 EtherChannel, perform this task:
	Command		Purpose
Step 1
	Router(config)# interface port-channel		Creates the port channel interface.
	group_number
	Router(config)# no interface port-channel		Deletes the port channel interface.
	group_number
Step 2
	Router(config-if)# ip address ip_address mask		Assigns an IP address and subnet mask to the
			EtherChannel.
Step 3
	Router(config-if)# end		Exits configuration mode.
Step 4
	Router# show running-config interface		Verifies the configuration.
	port-channel group_number
		Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08				12-7