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CHAPTER 11
Configuring Packet over SONET
Overview
POS Features
Copyright © 2010, Juniper Networks, Inc.
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 359
Platform Considerations on page 360
References on page 361
Before You Configure POS on page 362
Configuration Tasks on page 362
Monitoring POS on page 366
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
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