Juniper Networks E-Series manual Modules

E-Series Modules E-Series Routers

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Caution: Do not remove the SRP module while the system is running.

For details about installing SRP modules, see Chapter 5, Installing

Modules.

SRP Module Redundancy

SRP module redundancy is available only for ERX-7xx/14xx models. See

Redundancy Features, later in this chapter, for more information.

Nonvolatile Storage

The PCMCIA slot on the front of the SRP module holds a Type II PCMCIA nonvolatile storage (NVS) card (see Figure 1-12and Figure 1-13). This card is loaded with the system’s software and configuration files. The PCMCIA card is factory installed.

SRP I/O Module

The SRP I/O module is a single corresponding input/output module that interfaces with the SRP module(s) 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 ERX-7xx/14x models cannot be used in the ERX-310 router, and vice versa. See Figure 1-5, Figure 1-7, and Figure 1-9for locations.

Module Details

The SRP module provides standard craft management interfaces, including:

•10/100Base-T – Enables access to the E-series router for Ethernet management functions via CLI or SNMP, for example.

•RS-232 – 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 – Provide for remote indication of critical, major, and minor E-series router alarms (ERX-7xx/14xx models only; currently not implemented)

•External timing inputs – Provide a method of ensuring that the clock timing used by the E-series router remains synchronized with the network’s system clock. BNC connectors and wire wraps are available for ERX-7xx/14xx models only.