Cisco Systems 3750E Configuring Layer 3 EtherChannels, Creating Port-Channel Logical Interfaces

Chapter 37 Configuring EtherChannels and Link-State Tracking

Configuring EtherChannels

This example shows how to configure an EtherChannel on a single switch in the stack. It assigns two ports as static-access ports in VLAN 10 to channel 5 with the PAgP mode desirable:

Switch# configure terminal

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

Switch(config-if-range)# switchport mode access

Switch(config-if-range)# switchport access vlan 10

Switch(config-if-range)#channel-group 5 mode desirable non-silent

Switch(config-if-range)# end

This example shows how to configure an EtherChannel on a single switch in the stack. It assigns two ports as static-access ports in VLAN 10 to channel 5 with the LACP mode active:

Switch# configure terminal

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

Switch(config-if-range)# switchport mode access

Switch(config-if-range)# switchport access vlan 10

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

Switch(config-if-range)# end

This example shows how to configure a cross-stack EtherChannel on Catalyst 3750-E switches. It uses LACP passive mode and assigns two ports on stack member 2 and one port on stack member 3 as static-access ports in VLAN 10 to channel 5:

Switch# configure terminal

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

Switch(config-if-range)# switchport mode access

Switch(config-if-range)# switchport access vlan 10

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

Switch(config-if-range)# exit

Switch(config)# interface gigabitethernet3/0/3

Switch(config-if)#switchport mode access

Switch(config-if)#switchport access vlan 10

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

Switch(config-if)# exit

Configuring Layer 3 EtherChannels

To configure Layer 3 EtherChannels, you create the port-channel logical interface and then put the Ethernet ports into the port-channel as described in the next two sections.

Creating Port-Channel Logical Interfaces

When configuring Layer 3 EtherChannels, you should first manually create the port-channel logical interface by using the interface port-channelglobal configuration command. Then you put the logical interface into the channel group by using the channel-groupinterface configuration command.

Note To move an IP address from a physical port to an EtherChannel, you must delete the IP address from the physical port before configuring it on the port-channel interface.

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02		37-15