Ethernet Pseudowire Overview - Juniper ACX1000 Configuration Manual

ACX Series Universal Access Router Configuration Guide

Ethernet Pseudowire Overview

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Starting in Junos OS Release 14.1X53 and Junos OS Release 16.1, an Ethernet pseudowire
is used to carry Ethernet or 802.3 Protocol Data Units (PDUs) over an MPLS network
enabling service providers to offer emulated Ethernet services over existing MPLS
networks. Ethernet or 802.3 PDUs are encapsulated within the pseudowire to provide a
point-to-point Ethernet service. For the point-to-point Ethernet service, the following
fault management features are supported:
The IEEE 802.3ah standard for Operation, Administration, and Management (OAM).
You can configure IEEE 802.3ah OAM link-fault management on Ethernet point-to-point
direct links or links across Ethernet repeaters.
Ethernet OAM link-fault management can be used for physical link-level fault detection
and management. It uses a new, optional sublayer in the data link layer of the OSI
model. Ethernet OAM can be implemented on any full-duplex point-to-point or
emulated point-to-point Ethernet link. A system-wide implementation is not required;
OAM can be deployed on particular interfaces of a router. Transmitted Ethernet OAM
messages or OAM PDUs are of standard length, untagged Ethernet frames within the
normal frame length limits in the range 64–1518 bytes.
Ethernet connectivity fault management (CFM) to monitor the physical link between
two routers.
Connection protection using the continuity check protocol for fault monitoring . The
continuity check protocol is a neighbor discovery and health check protocol that
discovers and maintains adjacencies at the VLAN or link level.
Path protection using the linktrace protocol for path discovery and fault verification
. Similar to IP traceroute, the linktrace protocol maps the path taken to a destination
MAC address through one or more bridged networks between the source and
destination.
Release Description
14.1X53 Starting in Junos OS Release 14.1X53 and Junos OS Release 16.1, an Ethernet
pseudowire is used to carry Ethernet or 802.3 Protocol Data Units (PDUs) over
an MPLS network enabling service providers to offer emulated Ethernet services
over existing MPLS networks.
Configuring IEEE 802.3ah OAM Link-Fault Management
Pseudowire Overview for ACX Series Universal Access Routers on page 590
TDM Pseudowires Overview on page 600
ATM Pseudowire Overview on page 173
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