Juniper Networks ERX Hardware 8 - Manual (Page 26)

ERX 8.0.x Hardware Guide
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” on page 10 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)
Fan tray
Line modules
SRP module
PCMCIA slot
AC power
supply A
AC power
supply B
g013731
NOTE: The DC model has blank filler panels in power supply slots.
8 ERX Routers