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# ERX Routers

Five models of ERX routers are available:

- ERX-1440 router
- ERX-1410 router
- ERX-710 router
- ERX-705 router
- ERX-310 router

All models use the same software. However, the specific model determines the:

- Combination of line modules supported
- Conditions for line rate performance of line modules
- Type, capacity, and number of SRP modules used

## ERX-14xx Models

| Note: In the E-series documentation, the term ERX-14xx models refers to both the ERX-1440 router and the ERX-1410 router. The terms ERX-1440 router and ERX-1410 router refer to the specific models. See Figure 1 and Figure 2.

The ERX-1440 router manages an extremely high volume of network traffic, and uses a 40-Gbps switch route processor (SRP) module, either the SRP-40G or SRP-40G+ module. (The SRP-40G+ module obsoletes the SRP-40G module; however, the software continues to support both modules.) In this model, all line modules operate at full wire speed simultaneously.

The ERX-1410 router manages high levels of network traffic, and uses the 10-Gbps SRP module (SRP-10G). You can configure the ERX-1410 router to enable the line modules either to operate at full line rate performance or to allow line modules to operate at a rate dependent on the resources available. The former option restricts the allowed combinations of line modules. For information on configuring performance of line modules, see JUNOSe System Basics Configuration Guide, Chapter 6, Managing Modules.

| Note: The 10-Gbps SRP module used in the ERX-310 router is different from the 10-Gbps SRP module used in the ERX-1410 router. See SRP Module for more information.

Externally, the ERX-1440 chassis is the same as the ERX-1410 chassis. (See Figure 1 and Figure 2.) Both routers contain 14 vertical slots to accommodate modules.

Internally, the ERX-1440 chassis differs from the ERX-1410 chassis, and includes a special midplane for the 40-Gbps SRP module.

Installation procedures and operating procedures are identical for both systems. All ERX-7xx and ERX-14xx models use the same SRP I/O module, but different power input modules are used.

| Note: The router may look different from the routers shown in the figures in this chapter, depending on the line modules in the slots.

Figure 1: ERX-14xx Models, Front View

Figure 2: ERX-14xx Models, Rear View

## ERX-7xx Models

| Note: In the E-series documentation, the term ERX-7xx models refers to both the ERX-705 router and the ERX-710 router. The terms ERX-705 router and ERX-710 router refer to the specific models. See Figure 3 and Figure 4.

The ERX-7xx models are robust, high-density routers with less capacity than the ERX-14xx models. The ERX-7xx models use either the SRP-10G module or the SRP-5G module.

You can configure the ERX-7xx models to enable the line modules (LM) to operate either at full line rate performance or at a rate dependent on the resources available. For information about configuring performance of line modules, see JUNOSe System Basics Configuration Guide, Chapter 6, Managing Modules.

| Note: The 10-Gbps SRP module used in the ERX-310 router is different from the 10-Gbps SRP module used in the ERX-710 router. See SRP Module for more information.

The ERX-705 chassis is the same as the ERX-710 chassis. (See Figure 3 and Figure 4.) The chassis contains seven slots to accommodate modules. Installation procedures and operating procedures are identical for both systems. All ERX-7xx and ERX-14xx models use the same SRP I/O module, but different power input modules are used.

| Note: The router may look different from the routers shown in the figures in this chapter, depending on the line modules in the slots.

Figure 3: ERX-7xx Models, Front View

Figure 4: ERX-7xx Models, Rear View

## ERX-310 Router

The ERX-310 router is a low-end platform that supports all of the same services as the ERX-7xx and ERX-14xx models, but with smaller capacity and scaling capabilities. Like the ERX-7xx and ERX-14xx models, the ERX-310 router uses the same software architecture, providing a single IP entry point into the network with the same IP-based protocols and services that are available on other ERX routers. The ERX-310 router is designed to be used as a small distributed POP router as well as a high-end CPE router.

The ERX-310 router is a three-slot chassis with a midplane architecture. One slot supports one nonredundant 10-Gbps SRP module, while the other two slots support line modules. The router supports existing E-series ASIC-based line modules (except the OC48/STM16 line module), as well as a select number of combination cards. The combination cards provide a fixed combination of interfaces on the I/O module so that a single slot can support multiple interfaces (ATM OC3 and GE, for example).

| Note: The 10-Gbps SRP module used in the ERX-310 router is different from the 10-Gbps SRP module used in the ERX-7xx and ERX-14xx models. See SRP Module for more information.

The ERX-310 router is available in either redundant AC- or DC-powered models.

Figure 5: ERX-310 Router, Front View (AC Model)

| Note: The DC model has blank filler panels in power supply slots.

Figure 6: ERX-310 Router, Rear View (AC Model)

Figure 7: ERX-310 Router, Rear View (DC Model)

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