Dell PowerConnect J-EX4200-24T Software Manual page 819

Requirements
Overview and Topology
information. J-EX Series switches allow you to further enhance these links by configuring
Link Aggregation Control Protocol (LACP).
This example describes how to overlay LACP on the LAG configurations that were created
in "Example: Configuring Aggregated Ethernet High-Speed Uplinks Between a Virtual
Chassis Access Switch and a Virtual Chassis Distribution Switch" on page 740:
Requirements on page 747
Overview and Topology on page 747
Configuring LACP for the LAGs on the Virtual Chassis Access Switch on page 748
Configuring LACP for the LAGs on the Virtual Chassis Distribution Switch on page 748
Verification on page 749
Troubleshooting on page 750
This example uses the following software and hardware components:
Two J-EX4200-48T switches
Two J-EX4200-24F switches
Four J-EX Series uplink modules
Before you configure LACP, be sure you have:
Set up the Virtual Chassis switches. See "Example: Configuring a Virtual Chassis with
a Master and Backup in a Single Wiring Closet" on page 717.
Configured the uplink ports on the switches as trunk ports. See "Configuring Gigabit
Ethernet Interfaces (CLI Procedure)" on page 919.
Configured the LAGs. See "Example: Configuring Aggregated Ethernet High-Speed
Uplinks Between a Virtual Chassis Access Switch and a Virtual Chassis Distribution
Switch" on page 740
This example assumes that you are already familiar with the Example: Configuring
Aggregated Ethernet High-Speed Uplinks between Virtual Chassis Access Switch and
Virtual Chassis Distribution Switch. The topology in this example is exactly the same as
the topology in that other example. This example shows how to use LACP to enhance
the LAG functionality.
LACP exchanges are made between actors (the transmitting link) and partners (the
receiving link). The LACP mode can be either active or passive.
NOTE: If the actor and partner are both in passive mode, they do not exchange
LACP packets, which results in the aggregated Ethernet links not coming up.
By default, LACP is in passive mode. To initiate transmission of LACP packets
and responses to LACP packets, you must enable LACP in active mode.
Chapter 44: Virtual Chassis—Configuration Examples
747