Technical data

BLADE OS 5.1 Application Guide
72
 Chapter 4: Ports and Trunking BMD00136, November 2009
When the system is initialized, all ports by default are in LACP off mode and are assigned unique
admin keys. To make a group of ports aggregatable, you assign them all the same admin key. You
must set the port’s LACP mode to active to activate LACP negotiation. You can set other port’s
LACP mode to passive, to reduce the amount of LACPDU traffic at the initial trunk-forming stage.
Use the following command to check whether the ports are trunked:
Note – If you configure LACP on ports with 802.1X network access control, make sure the ports
on both sides of the connection are properly configured for both LACP and 802.1X.
LACP Configuration Guidelines
Consider the following guidelines when you configure LACP trunks:
 The range of potential LACP trunk IDs is 53-104.
 When an 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.
 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 # show lacp information
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