Services Routers Hardware Guide

Built-In Gigabit Ethernet Ports
Four built-in Gigabit Ethernet ports provide LAN connections over copper interfaces
to hubs, switches, local servers, and workstations. You can also designate an Ethernet
port for management traffic. When configuring one of these ports, you use the
interface name that corresponds to the port’s location. From left to right on the front
panel, the interface names for the ports are ge-0/0/0, ge-0/0/1, ge-0/0/2, and
ge-0/0/3.
For Gigabit Ethernet port pinout information, see “Gigabit Ethernet uPIM RJ-45
Connector Pinout” on page 189.
Each port has two LEDs, a TX/RX LED on the left side and a LINK LED on the right
side. Table 10 on page 17 describes the built-in Ethernet port LEDs.
Table 10: Gigabit Ethernet Port LEDs
DescriptionStateColorFunction
Port is online.On steadilyGreen
LINK
Port is offline.OffUnlit
Port is transmitting or receiving data.BlinkingGreen
TX/RX
Port might be online, but it is not receiving data.OffUnlit
Console Port
You can use the console port on the chassis front panel to connect to the Routing
Engine through an RJ-45 serial cable. From the chassis console port, you can use the
CLI to configure the router. The console port is configured as data terminal equipment
(DTE) and supports the RS-232 (EIA-232) standard.
For information about securing the chassis console port, see the JUNOS Software
Administration Guide.
For pinout information, see “Chassis Console Port Pinouts” on page 190.
AUX Port
The port labeled AUX on the front panel of the J-series Services Router is for future
use and is not activated.
USB Port
The USB ports on the front panel of the router (see Figure 8 on page 13 and
Figure 9 on page 13) accept a USB storage device or USB storage device adapter with
a compact flash installed, as defined in the CompactFlash Specification published by
the CompactFlash Association. When a USB storage device is installed and configured,
it automatically acts as a secondary boot device if the internal compact flash fails on
startup. Depending on the size of the USB storage device, you can also configure it
J2320 and J2350 Services Router Hardware Features ■ 17
Chapter 2: J-series Services Router Hardware Features