•
[edit logical-systems logical-system-name protocols l2circuit local-switching interface
interface-name]
NOTE: ACX Series routers do not support the [edit logical-systems]
hierarchy level.
Example: Configuring Layer 2 Circuit Switching Protection
Unlike Layer 2 circuit protect interfaces (see Example: Configuring Layer 2 Circuit Protect
Interfaces), which provide traffic protection for paths configured between the PE routers
and CE routers, Layer 2 circuit switching protection provides traffic protection for the
paths configured between the PE routers. In the event the path used by a Layer 2 circuit
fails, traffic can be switched to an alternate path (or protection path). Switching protection
is supported for locally switched Layer 2 circuits and provides 1 to 1 protection for each
Layer 2 circuit interface.
When you enable Layer 2 circuit switching protection, each Layer 2 circuit interface
requires the following paths:
•
Working path—Used by the Layer 2 circuit when working normally.
•
Protection path—Used by the Layer 2 circuit when the working path fails.
•
Requirements on page 783
•
Overview on page 783
•
Configuration on page 784
Requirements
This example uses the following hardware and software components:
•
ACX5000 Series Routers
•
Junos OS Release 15.1X54–D60
Overview
Each working path can be configured using a pseudowire configured through an
intermediate PE router (as shown in Figure 43 on page 784). The protection path provides
failure protection for the traffic flowing between the PE routers. Failures are detected
through the link down trap.
NOTE: Non-stop routing (NSR) and graceful routing engine switchover
(GRES) do not support Layer 2 circuit switching protection.
783Copyright © 2017, Juniper Networks, Inc.
Chapter 25: Configuring Layer 2 and Layer 3 Services
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