Line Modules; Packet Classification; I/O Adapters - Juniper E SERIES BROADBAND SERVICES ROUTERS 11.3.X - E120 AND E320 HARDWARE GUIDE REV 9-29-2010 Hardware Manual

Line Modules

I/O Adapters

Copyright © 2010, Juniper Networks, Inc.
NOTE: You must complete the hot-swapping of the SRP IOA within 1800
seconds.
For details about installing the SRP IOA, see "Installing Modules" on page 25.
Line modules (LMs) act as frame forwarding engines for the physical interfaces (the
IOAs) and process data from different types of network connections. For information
about available line modules, and which SRP modules support specific line modules,
see the E120 and E320 Module Guide.
Figure 7 on page 11 shows a representative line module. For details about installing line
modules, see "Installing Modules" on page 25.
Figure 7: Representative Line Module

Packet Classification

The line module supports packet classification on ingress. A classification engine on the
line module matches specific fields (such as source and destination IP address, source
and destination port, and protocol), the ingress IP interface, layer 2 fields, or some
combination of these against user-configured filters at wire speed.
Most input/output adapters (IOA) provide the physical interconnection to the network
via small form-factor pluggable transceivers (SFPs). You insert each IOA into the passive
midplane in the rear of the chassis, directly behind a line module. See Figure 2 on page 5
Chapter 1: E120 and E320 Overview
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