Users Guide

Create port-channel
You can create a maximum of 128 port-channels, with up to 32 port members per group. Configure a port-channel similarly to a
physical interface, enable or configure protocols, or ACLs to a port channel. After you enable the port-channel, place it in L2 or
L3 mode.
To place the port-channel in L2 mode or configure an IP address to place the port-channel in L3 mode, use the switchport
command.
● Create a port-channel in CONFIGURATION mode.
interface port-channel id-number
Create port-channel
OS10(config)# interface port-channel 10
Add port member
When you add an interface to a port-channel:
● The administrative status applies to the port-channel.
●
The port-channel configuration is applied to the member interfaces.
● A port-channel operates in either L2 (default) or L3 mode. To place a port-channel in L2 mode, use the switchport mode
command. To place a port-channel in L3 mode and remove L2 configuration before you configure an IP address, use the no
switchport command.
● All interfaces must have the same speed.
● An interface must not contain non-default L2/L3 configuration settings. Only the description and shutdown or no
shutdowncommands are supported. You cannot add an IP address or static MAC address to a member interface.
● You cannot enable flow control on a port-channel interface. Flow control is supported on physical interfaces that are
port-channel members.
● Port-channels support 802.3ad LACP. LACP identifies similarly configured links and dynamically groups ports into a logical
channel. LACP activates the maximum number of compatible ports that the switch supports in a port-channel.
● If you globally disable a spanning-tree operation, L2 interfaces that are LACP-enabled port-channel members may flap due to
packet loops.
Add port member — static LAG
A static port-channel LAG contains member interfaces that you manually assign using the channel-group mode on
command.
OS10(config)# interface port-channel 10
Aug 24 4:5:38: %Node.1-Unit.1:PRI:OS10 %dn_ifm
%log-notice:IFM_ASTATE_UP: Interface admin state up.:port-channel10
Aug 24 4:5:38: %Node.1-Unit.1:PRI:OS10 %dn_ifm
%log-notice:IFM_OSTATE_DN: Interface operational state is down.:port-channel10
OS10(conf-if-po-10)# exit
OS10(config)# interface ethernet 1/1/2
OS10(conf-if-eth1/1/2)# channel-group 10 mode on
Aug 24 4:5:56: %Node.1-Unit.1:PRI:OS10 %dn_ifm
%log-notice:IFM_OSTATE_UP: Interface operational state is up.:port-channel10
Add port member — dynamic LACP
LACP enables ports to dynamically bundle as members of a port-channel. To configure a port for LACP operation, use the
channel-group mode {active|passive} command. Active and Passive modes allow LACP to negotiate between ports
to determine if they can form a port channel based on their configuration settings.
OS10(config)# interface port-channel 100
OS10(conf-if-po-100)# exit
OS10(config)# interface ethernet 1/1/2
OS10(conf-if-eth1/1/2)# channel-group 100 mode active
Interfaces
263