Cisco Catalyst 3120 Command Reference Manual page 68

Chapter 2 Cisco Catalyst Blade Switch 3120 for HP Cisco IOS Commands
channel-group
Do not configure a port that is an active or a not-yet-active member of an EtherChannel as an
IEEE 802.1x port. If you try to enable IEEE 802.1x authentication on an EtherChannel port, an error
message appears, and IEEE 802.1x authentication is not enabled.
Do not configure a secure port as part of an EtherChannel or an EtherChannel port as a secure port.
For a complete list of configuration guidelines, see the "Configuring EtherChannels" chapter in the
software configuration guide for this release.
Do not enable Layer 3 addresses on the physical EtherChannel ports. Do not assign bridge groups on the
Caution
physical EtherChannel ports because it creates loops.
Examples
This example shows how to configure an EtherChannel on a single switch in the stack. It assigns two
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
Switch(config-if-range)# end
This example shows how to configure an EtherChannel on a single switch in the stack. It assigns two
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 in a switch stack. 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 passive
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 passive
Switch(config-if)# exit
You can verify your settings by entering the show running-config privileged EXEC command.
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