Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 1051

Example: Configuring Aggregated Ethernet High-Speed Uplinks with LACP Between
an EX4200 Virtual Chassis Access Switch and an EX4200 Virtual Chassis Distribution
Switch
Requirements
Copyright © 2010, Juniper Networks, Inc.
EX Series switches allow you to combine multiple Ethernet links into one logical interface
for higher bandwidth and redundancy. The ports that are combined in this manner are
referred to as a link aggregation group (LAG) or bundle. The number of Ethernet links
you can combine into a LAG depends on your EX Series switch model. See "Understanding
Aggregated Ethernet Interfaces and LACP" on page 1244 for more information. 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 an EX4200
Virtual Chassis Access Switch and an EX4200 Virtual Chassis Distribution Switch" on
page 940:
Requirements on page 947
Overview and Topology on page 948
Configuring LACP for the LAGs on the Virtual Chassis Access Switch on page 948
Configuring LACP for the LAGs on the Virtual Chassis Distribution Switch on page 949
Verification on page 949
Troubleshooting on page 951
This example uses the following software and hardware components:
Junos OS Release 9.0 or later for EX Series switches
Two EX4200-48P switches
Two EX4200-24F switches
Four EX Series XFP uplink modules
Before you configure LACP, be sure you have:
Set up the Virtual Chassis switches. See "Example: Configuring an EX4200 Virtual
Chassis with a Master and Backup in a Single Wiring Closet" on page 917.
Configured the uplink ports on the switches as trunk ports. See "Configuring Gigabit
Ethernet Interfaces (CLI Procedure)" on page 1284.
Configured the LAGs. See "Example: Configuring Aggregated Ethernet High-Speed
Uplinks Between an EX4200 Virtual Chassis Access Switch and an EX4200 Virtual
Chassis Distribution Switch" on page 940
Chapter 38: EX4200 Virtual Chassis—Configuration Examples
947