Configuring Layer 2 Etherchannels - Cisco Catalyst 4500 Series Configuration Manual

Configuring EtherChannel
Number of aggregators:
Group
------+-------------+-----------+-----------------------------------------------
1
Switch#

Configuring Layer 2 EtherChannels

To configure Layer 2 EtherChannels, configure the Ethernet interfaces with the channel-group
command. This operation creates the port channel logical interface.
Cisco IOS software creates port channel interfaces for Layer 2 EtherChannels when you configure
Note
Layer 2 Ethernet interfaces with the channel-group command.
To configure Layer 2 Ethernet interfaces as Layer 2 EtherChannels, perform this task for each interface:
Command
Step 1
Switch(config)# interface {fastethernet | gigabitethernet
| tengigabitethernet} slot/port
Step 2
Switch(config-if)# channel-group port_channel_number mode
{active | on | auto | passive | desirable}
Step 3
Switch(config-if)# end
Step 4
Switch# show running-config interface {fastethernet |
gigabitethernet} slot/port
Switch# show interface {fastethernet | gigabitethernet |
tengigabitethernet} slot/port etherchannel
This example shows how to configure Fast Ethernet interfaces 5/6 and 5/7 into port channel 2 with PAgP
mode desirable:
Switch# configure terminal
Switch(config)# interface range fastethernet 5/6 - 7 (Note: Space is mandatory.)
Switch(config-if-range)# channel-group 2 mode desirable
Switch(config-if-range)# end
Switch# end
Note See the
keyword.
This example shows how to verify the configuration of port channel interface 2:
Switch# show running-config interface port-channel 2
Building configuration...
Current configuration:
!
Software Configuration Guide—Release IOS XE 3.3.0SG and IOS 15.1(1)SG
24-10
Port-channel Protocol
Po1(SD) LACP
"Configuring a Range of Interfaces" section on page 7-4
Chapter 24 Configuring EtherChannel and Link State Tracking
2
Ports
Gi1/23(H) Gi1/24(H)
Purpose
Selects a physical interface to configure.
Configures the interface in a port channel and
specifies the PAgP or LACP mode.
If you use PAgP, enter the keywords auto or
desirable.
If you use LACP, enter the keywords active or
passive.
Exits configuration mode.
Verifies the configuration.
for information about the range
OL-25340-01