Juniper Networks J2350 manual Built-In Gigabit Ethernet Ports, Console Port, AUX Port, USB Port

Chapter 2: J-series Services Router Hardware Features

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

Function	Color	State	Description
LINK	Green	On steadily	Port is online.
	Unlit	Off	Port is offline.
TX/RX	Green	Blinking	Port is transmitting or receiving data.
	Unlit	Off	Port might be online, but it is not receiving data.

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

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