Chapter 37 Configuring EtherChannels and Link-State Tracking

Configuring EtherChannels

This example shows how to configure an EtherChannel. It assigns two ports to channel 5 with the LACP mode active:

Switch# configure terminal

Switch(config)# interface range gigabitethernet2/0/1 -2

Switch(config-if-range)# no ip address

Switch(config-if-range)# no switchport

Switch(config-if-range)#channel-group 5 mode active

Switch(config-if-range)# end

This example shows how to configure a cross-stack EtherChannel. It assigns two ports on stack member

2 and one port on stack member 3 to channel 7 using LACP active mode:

Switch# configure terminal

Switch(config)# interface range gigabitethernet2/0/4 -5

Switch(config-if-range)# no ip address

Switch(config-if-range)# no switchport

Switch(config-if-range)#channel-group 7 mode active

Switch(config-if-range)# exit

Switch(config)# interface gigabitethernet3/0/3

Switch(config-if)# no ip address

Switch(config-if)# no switchport

Switch(config-if)#channel-group 7 mode active

Switch(config-if)# exit

Configuring EtherChannel Load-Balancing

This section describes how to configure EtherChannel load-balancing by using source-based or destination-based forwarding methods. For more information, see the “Load-Balancing and Forwarding Methods” section on page 37-8.

Beginning in privileged EXEC mode, follow these steps to configure EtherChannel load-balancing. This procedure is optional.

 

Command

Purpose

Step 1

 

 

configure terminal

Enter global configuration mode.

Step 2

 

 

port-channel load-balance {dst-ip dst-mac

Configure an EtherChannel load-balancing method.

 

src-dst-ip src-dst-mac src-ip src-mac}

The default is src-mac.

 

 

 

 

Select one of these load-distribution methods:

 

 

dst-ip—Load distribution is based on the destination-host IP

 

 

address.

 

 

dst-mac—Load distribution is based on the destination-host

 

 

MAC address of the incoming packet.

 

 

src-dst-ip—Load distribution is based on the

 

 

source-and-destination host-IP address.

 

 

src-dst-mac—Load distribution is based on the

 

 

source-and-destination host-MAC address.

 

 

src-ip—Load distribution is based on the source-host IP

 

 

address.

 

 

src-mac—Load distribution is based on the source-MAC

 

 

address of the incoming packet.

 

 

 

 

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

37-18

OL-9775-02

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Cisco Systems 3750E manual Configuring EtherChannel Load-Balancing, Port-channel load-balance dst-ip dst-mac, 37-18