Configuring Layer 3 Etherchannels; Creating Port-Channel Logical Interfaces - Cisco WS-C3550-12G Software Configuration Manual

Chapter 21 Configuring EtherChannel

Configuring Layer 3 EtherChannels

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

Creating Port-Channel Logical Interfaces

Note To move an IP address from a physical interface to an EtherChannel, you must delete the IP address
from the physical interface 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:
Command
Step 1 configure terminal
Step 2
interface port-channel port-channel-number
Step 3
no switchport
Step 4 ip address ip-address mask
Step 5
end
Step 6
show etherchannel channel-group-number detail
Step 7 copy running-config startup-config
Step 8
To remove the port-channel, use the no interface port-channel port-channel-number global
configuration command.
This example shows how to create the logical port channel (5) and assign 172.10.20.10 as its IP address:
Switch# configure terminal
Switch(config)# interface port-channel 5
Switch(config-if)# no switchport
Switch(config-if)# ip address 172.10.20.10 255.255.255.0
Switch(config-if)# end
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Purpose
Enter global configuration mode.
Enter interface configuration mode, and create the
port-channel logical interface.
For port-channel-number, the range is 1 to 64.
Put the interface into Layer 3 mode.
You must have the EMI installed to use this command.
Assign an IP address and subnet mask to the EtherChannel.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Assign an Ethernet interface to the Layer 3 EtherChannel.
For more information, see the
Interfaces" section on page
Catalyst 3550 Multilayer Switch Software Configuration Guide
Configuring EtherChannel
"Configuring the Physical
21-12.
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