RackSwitch G8000 Application Guide
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Chapter 4: Ports and Trunking BMD00041, November 2008
LACP configuration guidelines
Consider the following guidelines when you configure LACP trunks:
When ports become members of a trunk, configuration parameters (except ACL and QoS)
are applied per trunk. When a trunk group is formed, these parameters are configured for
the trunk ID, which overrides the port-level parameters.
The range of potential LACP trunk IDs is 53-104.
When a LACP trunk forms, the trunk ID is determined by the lowest port number in the
trunk. For example, if the lowest port number is 1, then the LACP trunk ID is 53.
The LACP trunk ID can change if the link is lost on the lowest port in the group. When the
trunk ID changes, trunk-level parameters are cleared. To avoid losing configuration
parameters, configure LACP trunk-level parameters for all possible trunk IDs. Use the
port range configuration mode to set parameters for all of the ports that might participate
in LACP.
When a port becomes a member of a LACP trunk, LACP overrides the individual port
configuration.
If the port leaves the LACP trunk, you must reconfigure the port settings.
Each port that is configured to participate in LACP must be set to full duplex.
Configuring LACP
Use the following procedure to configure LACP on ports 2-6 to participate in link aggregation.
1. Configure port parameters. All ports that participate in the LACP trunk group must
have the same settings, including VLAN membership.
2. Select a range of ports and define the admin key. Only ports with the same admin key
can form a LACP trunk group.
3. Set the LACP mode.
RS G8000 (config)# interface port 2-6
RS G8000 (config-if)# lacp key 100
RS G8000 (config-if)# lacp mode active
RS G8000 (config-if)# exit
