4 Command Line Interface

Dynamically Creating a Port Channel –

Ports assigned to a common port channel must meet the following criteria:

•Ports must have the same LACP system priority.

•Ports must have the same port admin key (Ethernet Interface).

•If the port channel admin key (lacp admin key - Port Channel) is not set when a channel group is formed (i.e., it has the null value of 0), this key is set to the same value as the port admin key (lacp admin key - Ethernet Interface) used by the interfaces that joined the group.

•However, if the port channel admin key is set, then the port admin key must be set to the same value for a port to be allowed to join a channel group.

•If a link goes down, LACP port priority is used to select the backup link.

channel-group

This command adds a port to a trunk. Use the no form to remove a port from a trunk.

Syntax

channel-group channel-idno channel-group

channel-id- Trunk index (Range: 1-4)

Default Setting

The current port will be added to this trunk.

Command Mode

Interface Configuration (Ethernet Ports 1-8)

Command Usage

•When configuring static trunks, the switches must comply with the Cisco EtherChannel standard.

•Use no channel-group to remove a port group from a trunk.

•Use no interfaces port-channel to remove a trunk from the switch.

Example

The following example creates trunk 1 and then adds port 8:

Console(config)#interface port-channel 1

Console(config-if)#exit

Console(config)#interface ethernet 1/8

Console(config-if)#channel-group 1

Console(config-if)#

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