Srp Module Redundancy; Nonvolatile Storage; Srp I/O Module; Module Details - Juniper E SERIES BROADBAND SERVICES ROUTERS 11.3.X - ERX HARDWARE GUIDE REV 26-9-2010 Hardware Manual

ERX 11.3.x Hardware Guide

SRP I/O Module

Line Modules

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For details about installing SRP modules, see "Installing Modules" on page 31.

SRP Module Redundancy

SRP module redundancy is available only for ERX7xx and ERX14xx models. See
"Redundancy Features" on page 14

Nonvolatile Storage

The PCMCIA slot on the front of the SRP module holds a Type II PCMCIA nonvolatile
storage (NVS) card. (See Figure 9 on page 10 and Figure 10 on page 11.) This card is
loaded with the system's software and configuration files. The PCMCIA card is factory
installed.
CAUTION: Although you can remove PCMCIA NVS (Flash) cards from a
running router, we recommend that you do not do so. If you remove the card
while data is being written to or copied from the NVS card, data can be lost
or corrupted. Therefore, we strongly recommend that you shut down the
router before removing a PCMCIA NVS card.
The SRP I/O module is a single corresponding input/output module that interfaces with
the SRP modules through the system's midplane. The same SRP I/O module works with
all SRP modules, but is router specific. The I/O module used in ERX7xx and ERX14xx
models cannot be used in the ERX310 router, and vice versa. See Figure 2 on page 5,
Figure 4 on page 7, and Figure 6 on page 8 for locations.

Module Details

The SRP I/O module provides standard craft management interfaces, including:
10/100Base-T—The port enables access to the ERX router for Ethernet management
functions via CLI or SNMP, for example.
RS-232—The port provides a serial connection for monitoring the system's hardware
configuration through a PC (running terminal emulation software) or ASCII terminal.
Allows direct CLI access.
Alarm contacts—The contacts provide for remote indication of critical, major, and
minor router alarms (ERX7xx and ERX14xx models only; currently not implemented)
External timing inputs—The inputs provide a method of ensuring that the clock timing
used by the router remains synchronized with the network's system clock. BNC
connectors and wire wraps are available for ERX7xx and ERX14xx models only.
For details about installing the SRP I/O module, see "Installing Modules" on page 31.
Line modules (LM) process data from different types of network connections. For
information about available line modules and which SRP modules support specific line
modules, see the ERX Module Guide.
Copyright © 2010, Juniper Networks, Inc.