Cisco Catalyst 3750 - Configuring Layer 3 Etherchannels; Creating Port-Channel Logical Interfaces

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Catalyst 3750 Metro Switch Software Configuration Guide
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Chapter 27 Configuring EtherChannels
Configuring EtherChannels
This example shows how to configure an EtherChannel. 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 fastethernet1/0/4 -5
Switch(config-if-range)# switchport mode access
Switch(config-if-range)# switchport access vlan 10
Switch(config-if-range)# channel-group 5 mode desirable non-silent
Switch(config-if-range)# end
This example shows how to configure an EtherChannel. 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 gigabitethernet1/0/1 -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
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-channel global configuration command. Then you put the logical
interface into the channel group by using the channel-group interface 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. Beginning in privileged EXEC mode,
follow these steps to create a port-channel interface for a Layer 3 EtherChannel. This procedure is
required.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface port-channel port-channel-number Create the port-channel logical interface, and enter interface
configuration mode.
For port-channel-number, the range is 1 to 12.
Step 3
no switchport Put the interface into Layer 3 mode.
Step 4
ip address ip-address mask Assign an IP address and subnet mask to the EtherChannel.
Step 5
end Return to privileged EXEC mode.
Step 6
show etherchannel channel-group-number detail Verify your entries.