Enabling a dynamic LACP trunk group

In the default port configuration, all ports on the switch are set to disabled. To enable the switch to automatically form a trunk group that is dynamic on both ends of the link, the ports on one end of a set of links must be LACP Active. The ports on the other end can be either LACP Activeor LACP Passive. The active command enables the switch to automatically establish a (dynamic) LACP trunk group when the device on the other end of the link is configured for LACP Passive.

Example:

Figure 17: Criteria for automatically forming a dynamic LACP trunk

Syntax:

interface <port-list> lacp active

Configures <port-list> as LACP active. If the ports at the other end of the links on <port-list> are configured as LACP passive, this command enables a dynamic LACP trunk group on <port-list> .

Example:

This Example: uses ports C4 and C5 to enable a dynamic LACP trunk group.

switch(config)# interface c4-c5 lacp active