Configuring Layer 2 Etherchannels - Cisco Catalyst 4500 Series Software Configuration Manual

Chapter 27 Configuring EtherChannel and Link State Tracking
Number of channel-groups in use: 2
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.
M - not in use, minimum links not
u - unsuitable for
w - waiting to be aggregated
d - default port
Port-channel Protocol
Po1(SD) LACP
"Configuring a Range of Interfaces" section on page 9-4
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
met
bundling
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.
Configuring EtherChannel
for information about the range
27-11