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Configuring HDLC Layer 2 Services

The following commands configure an HDLC layer 2 circuit over MPLS between an E Series

router and a remote PE device.

To configure an HDLC layer 2 circuit over MPLS:

1. Configure a serial or POS interface on the ingress router.

host1(config)#interface serial 3/1:2/1

host1(config)#interface pos 4/0

2. Use one of the following methods to create the HDLC layer 2 circuit over MPLS:

•

Use the mpls-relay or route interface command without the relay-format ppp

keywords. This command causes the router to signal VC-type HDLC on the LDP

session and use HDLC encapsulation. Use this command syntax if the traffic carried

on the serial or POS interface is any kind of standard HDLC (including PPP) or

Cisco HDLC.

host1(config-if)#mpls-relay 2.2.2.1 1

host1(config-if)#route interface tunnel mpls:tunnel-to-pe2 1

•

Use the mpls-relay or route interface command with the relay-format ppp

keywords. This command causes the router to signal VC-type PPP on the LDP

session and use PPP encapsulation instead of the default VC-type HDLC signaling

and HDLC encapsulation. Use this command syntax if the traffic carried on the

serial or POS interface contains actual PPP packets.

host1(config-if)#mpls-relay 2.2.2.1 1 relay-format ppp

host1(config-if)#route interface tunnel mpls:tunnel-to-pe2 1 relay-format ppp

3. (Optional) Attach an MPLS policy to the HDLC layer 2 circuit by using the mpls

policy command.

JunosE 11.2.x BGP and MPLS Configuration Guide

Juniper JUNOSE 11.2.X BGP AND MPLS User Manual

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