Juniper Networks ERX Hardware 8 - Manual (Page 33)

ERX Overview
Figure 11: Representative Line Module
Midplane
connectors
Ejector
Status LEDs
Board reset
button
NMI button
g013737
Packet Classification
Most line modules support packet classification on ingress; some non-ASIC line
modules do not. 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.
I/O Modules
Most line modules have a corresponding input/output (I/O) module that provides
the physical interconnection to the network. Insert each I/O module into the
back of the system, directly behind its corresponding line module.
For information about which line modules pair with which I/O modules, see the
ERX Module Guide. See Figure 2, Figure 4, and Figure 6 for locations. For details
about installing I/O modules, see “Installing Modules” on page 35.
ERX Modules 15