Configuring Packet Over Sonet; Overview; Pos Features - Juniper JUNOSE SOFTWARE 11.0.X - LINK LAYER CONFIGURATION GUIDE 4-1-2010 Configuration Manual

Chapter 9

Configuring Packet over SONET

Overview

POS Features

Use the procedures described in this chapter to configure packet over SONET (POS)
on E Series routers.
This chapter contains the following sections:
Overview on page 313
Platform Considerations on page 314
References on page 315
Before You Configure POS on page 316
Configuration Tasks on page 316
Monitoring POS on page 321
Packet over SONET (Synchronous Optical Network)/SDH (Synchronous Digital
Hierarchy) is the serial transmission of data over SONET frames through the use of
a protocol such as Point-to-Point Protocol (PPP).
Packet over SONET/SDH is an ideal feature for networks that are built for providing
Internet or IP data. It provides superior bandwidth utilization and efficiency compared
with other transport methods. For expensive WAN links, packet over SONET can
provide as much as 25 to 30 percent higher throughput than networks based on
Asynchronous Transfer Mode (ATM). By transporting frames directly into the
SONET/SDH payload, the overhead required in an ATM cell header for IP over ATM
encapsulation is eliminated.
The router supports PPP, Cisco High-Level Data Link Control (HDLC), and Frame
Relay over SONET/SDH.
POS supports the following features:
Payload scrambling
Clock source configuration
Maximum transmission unit (MTU) size configuration
Maximum receive unit (MRU) size configuration
313
Overview