Services Routers Hardware Guide

Chapter 3
PIM Overview
J-series Services Routers accept Physical Interface Modules (PIMs) in the slots on the
front of the chassis.
CAUTION: PIMs are not hot-swappable. You must power off the Services Router
before removing or inserting a PIM module. Ensure that the PIMs are installed in the
router chassis before booting up the system.
A Physical Interface Module (PIM) is a network interface card that is installed on a
J-series Services Router to provide physical connections to a LAN or a WAN. The PIM
receives incoming packets from the network and transmits outgoing packets to the
network. Each PIM is equipped with a dedicated network processor that forwards
incoming data packets to the Routing Engine and receives outgoing data packets
from the Routing Engine. During this process, the PIM performs framing and
line-speed signaling for its medium type.
For a complete list of supported PIMs, see “Field-Replaceable PIMs” on page 38.
A single WXC Integrated Services Module (also called an ISM 200) can be installed
like a PIM in J2350, J4350, and J6350 routers to provide WAN acceleration. For more
information, see the WXC Integrated Services Module Installation and Configuration
Guide.
For J-series Services Router PIM compatibility matrix and datasheets, go to
http://www.juniper.net/products/jseries/.
For information about network interfaces, and for configuration instructions, see the
JUNOS Software Interfaces and Routing Configuration Guide.
This chapter contains the following topics:
■ PIM Terms on page 35
■ Field-Replaceable PIMs on page 38
PIM Terms
To understand PIM, become familiar with the terms defined in Table 18 on page 36.
PIM Terms ■ 35