Juniper Networks G10 CMTS manual Higher Layer Functions

DOCSIS Module

Figure 14: Packet Processing Layers

Management

Higher Layers

Interface

CMTS

Higher Layer

Network Layer

Functions

Protocols

Management

Interface

De-encapsulator

MPEG

Side-

VoIP

Packet

Downstream

Filtering

Forwarding

Data/IP

Network

Upstream

Frame

MAC Layer

Defragment

Parser

Deconcatenate

Decrypt

Packet Header

Classifier

Suppression

Frame

Encryption

Generator

Management/

Upstream

Scheduler

MPEG Groomer

Downstream

PHY Layer

Management/

Control

PMD Sublayer

DTC Sublayer

DOCSIS Data

Upconverter

Modem

to/from HFC

Higher Layer Functions

The DOCSIS Module provides the following higher layer functions:

!Packet filtering and forwarding—Filters Layer 2, Layer 3, Layer 4, and above based on DOCSIS 1.1 filter functionality.

!CMTS management—SNMP, MIBs, and CLI (command-line interface).

!Network-side interface (NSI)—IP data and VoIP interfaces.

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Hardware Component Overview 33