Juniper Networks ERX Hardware 8 - Manual (Page 66)

ERX 8.0.x Hardware Guide
Installing Components for Line Module Redundancy
A spare line module provides redundancy for a group of identical line
modules for ERX-7xx and ERX-14xx models only.
NOTE: The ERX-310 router does not support line module redundancy.
For line module redundancy to operate, you must install:
The line modules, including the spare line module
The redundancy midplane
The I/O modules, including the spare I/O module
For more information, see “Redundancy Features” on page 16.
WARNING: Do not insert any metal object, such as a screwdriver, or place your hand
into an open slot or the backplane when the router is on. Remove jewelry (including
rings, necklaces, and watches) before working on equipment that is connected to
power lines. These actions can prevent electric shock and serious burns.
CAUTION: When handling modules, use an antistatic wrist strap connected to the
router’s ESD grounding jack, and hold modules by their edges. Do not touch the
components, pins, leads, or solder connections. These actions help to protect
modules from damage by electrostatic discharge.
Installing the Line Modules
To install the line modules in a redundancy group:
1. Install the spare line module in the lowest-numbered slot of the redundancy
group.
2. Install the other line modules in the remaining slots. (See “Installing Line and
I/O Modules” on page 44.)
Installing the Redundancy Midplane
To install the redundancy midplane in a redundancy group:
48 Installing Components for Line Module Redundancy