Configuring Gigabit Ethernet Interfaces (Cli Procedure) - Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual

Complete Software Guide for Junos
Requirements
Overview and Topology
1262
®
OS for EX Series Ethernet Switches, Release 10.4
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 1262
Overview and Topology on page 1262
Configuring LACP for the LAGs on the Virtual Chassis Access Switch on page 1263
Configuring LACP for the LAGs on the Virtual Chassis Distribution Switch on page 1263
Verification on page 1264
Troubleshooting on page 1265
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
This example assumes that you are familiar with "Example: Configuring Aggregated
Ethernet High-Speed Uplinks Between an EX4200 Virtual Chassis Access Switch and
an EX4200 Virtual Chassis Distribution Switch" on page 940. 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.
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