Configuring Interfaces for Layer 2 Circuits Overview
A Layer 2 circuit or pseudowire is a point-to-point Layer 2 connection transported by
means of MPLS or another tunneling technology on the service provider’s network. Layer
2 circuits are also called pseudowires. A Layer 2 circuit is similar to a circuit cross-connect
(CCC), except that multiple Layer 2 circuits can be transported over a single
label-switched path (LSP) tunnel between two provider edge (PE) routers. In contrast,
each CCC requires a dedicated LSP.
The Junos OS implementation of Layer 2 circuits supports only the remote form of a
Layer 2 circuit; that is, a connection from a local customer edge (CE) router to a remote
CE router.
Related
Documentation
Configuring the Address for the Neighbor of the Layer 2 Circuit on page 774•
• Configuring the Neighbor Interface for the Layer 2 Circuit on page 774
• Configuring the Interface Encapsulation Type for Layer 2 Circuits on page 779
Configuring the Address for the Neighbor of the Layer 2 Circuit
All the Layer 2 circuits using a particular remote PE router designated for remote CE
routers are listed under the neighbor statement (“neighbor” designates the PE router).
Each neighbor is identified by its IP address and is usually the end-point destination for
the label-switched path (LSP) tunnel transporting the Layer 2 circuit.
To configure a PE router as a neighbor for a Layer 2 circuit, specify the neighbor address
using the neighbor statement:
neighbor address {
...
}
You can include this statement at the following hierarchy levels:
•
[edit protocols l2circuit]
Related
Documentation
Configuring Interfaces for Layer 2 Circuits Overview on page 774•
• Configuring the Neighbor Interface for the Layer 2 Circuit on page 774
• Configuring the Interface Encapsulation Type for Layer 2 Circuits on page 779
Configuring the Neighbor Interface for the Layer 2 Circuit
Each Layer 2 circuit is represented by the logical interface connecting the local provider
edge (PE) router to the local customer edge (CE) router. This interface is tied to the
Layer 2 circuit neighbor configured in “Configuring the Address for the Neighbor of the
Layer 2 Circuit” on page 774.
Copyright © 2017, Juniper Networks, Inc.774
ACX Series Universal Access Router Configuration Guide
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