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

Page 7

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

 

 

 

 

 

 

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Contents 12-1 Configuring EtherChannels12-2 EtherChannel Feature OverviewUnderstanding How EtherChannels Are Configured EtherChannel Configuration OverviewUnderstanding PAgP EtherChannel Configuration Understanding Manual EtherChannel Configuration12-3 12-4 Understanding Ieee 802.3ad Lacp EtherChannel ConfigurationUnderstanding Load Balancing Understanding Port Channel Interfaces12-5 12-6 12-7 Routerconfig# interface port-channelRouterconfig# no interface port-channel Router# show running-config interfaceRouter# show running-config interface port-channel Configuring Channel Groups12-8 12-9 Routerconfig-if# no lacp port-priorityRouter# show running-config interface type Router# show running-config interface fastethernet 5/612-10 Configuring the Lacp System Priority and System ID12-11 Configuring EtherChannel Load BalancingConfigures EtherChannel load balancing Reverts to default EtherChannel load balancing12-12 Configuring the EtherChannel Min-Links FeatureRouterconfig-if# port-channel min-links number Routerconfig-if# no port-channel min-links
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