•
Verification on page 980
•
Troubleshooting on page 981
Requirements
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 a Virtual Chassis with
a Master and Backup in a Single Wiring Closet” on page 947.
•
Configured the uplink ports on the switches as trunk ports. See “Configuring Gigabit
Ethernet Interfaces (CLI Procedure)” on page 1153.
•
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 970
Overview and Topology
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.
By default, the actor and partner send LACP packets every second. You can configure
the interval at which the interfaces send LACP packets by including the periodic statement
at the
[edit interfaces interface-name aggregated-ether-options lacp]
hierarchy level.
The interval can be fast (every second) or slow (every 30 seconds).
Configuring LACP for the LAGs on the Virtual Chassis Access Switch
To configure LACP for the access switch LAGs, perform these tasks:
Copyright © 2010, Juniper Networks, Inc.
978
Complete Software Guide for Junos
®
OS for EX Series Ethernet Switches, Release 10.3
Summary of Contents for JUNOS OS 10.3 - SOFTWARE
Page 325: ...CHAPTER 17 Operational Mode Commands for System Setup 229 Copyright 2010 Juniper Networks Inc ...
Page 1323: ...CHAPTER 56 Operational Mode Commands for Interfaces 1227 Copyright 2010 Juniper Networks Inc ...
Page 2841: ...CHAPTER 86 Operational Commands for 802 1X 2745 Copyright 2010 Juniper Networks Inc ...
Page 3367: ...CHAPTER 113 Operational Mode Commands for CoS 3271 Copyright 2010 Juniper Networks Inc ...
Page 3435: ...CHAPTER 120 Operational Mode Commands for PoE 3339 Copyright 2010 Juniper Networks Inc ...
Page 3529: ...CHAPTER 126 Operational Mode Commands for MPLS 3433 Copyright 2010 Juniper Networks Inc ...