Juniper ACX2000 Configuration Guide

LACP Monitoring
LACP exchanges are made between actors and partners. An actor is the local interface
in an LACP exchange. A partner is the remote interface in an LACP exchange.
LACP is defined in IEEE 802.3ad, Aggregation of Multiple Link Segments.
LACP is designed to achieve the following:
•
Automatic addition and deletion of individual links to the aggregate bundle without
user intervention
•
Link monitoring to check whether both ends of the bundle are connected to the correct
group
The Junos OS implementation of LACP provides link monitoring but not automatic addition
and deletion of links.
LACP monitoring can be either distributed or centralized. The default is distributed and
it can be overriden by configuring the centralized knob under LACP protocols. LACP
exchanges are made between actors and partners. An actor is the local interface in an
LACP exchange. A partner is the remote interface in an LACP exchange.
By default, LACP does not initiate a LACP PDU exchange. LACP packets can be configured
to exchange LACP PDUs at a rate of 1 packet per second, or a slower rate of 1 packet for
30 seconds.
The LACP mode can be active or passive. 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. If either the actor or partner is active, they do exchange LACP packets.
By default, LACP is turned off on aggregated Ethernet interfaces. If LACP is configured,
it is in passive mode by default. To initiate transmission of LACP packets and response
to LACP packets, you must configure LACP in active mode.
To enable LACP active mode, include the lacp statement at the [edit interfaces
interface-name aggregated-ether-options] hierarchy level, and specify the active option:
[edit interfaces interface-name aggregated-ether-options]
lacp {
active;
}
NOTE: The LACP process exists in the system only if you configure the system
in either active or passive LACP mode.
To restore the default behavior, include the lacp statement at the [edit interfaces
interface-name aggregated-ether-options] hierarchy level, and specify the passive option:
[edit interfaces interface-name aggregated-ether-options]
lacp {
passive;
}
155Copyright © 2017, Juniper Networks, Inc.
Chapter 4: Configuring Interfaces and Chassis

Juniper ACX2000 Specifications

General

Brand	Juniper
Model	ACX2000
Category	Network Router
Language	English