Routing Engine Boot Sequence - Juniper PTX5000 Hardware Manual

Packet transport router

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• Two USB ports USB0 and USB1—Provide a removable media interface through which you can install

Junos OS manually. Junos OS supports USB versions 3.0, 2.0, and 1.1.

• Two solid-state drive slots for the primary SSD SSD1 and the secondary SSD SSD2—Provide storage

for software images, configuration files, microcode, log files, and memory dumps. The Routing Engine

reboots the system from SSD2 when booting from SSD1 fails.

• RESET button—Reboots the Routing Engine when pressed.

• ONLINE/OFFLINE button—Takes the Routing Engine offline or brings it online when pressed.

NOTE: The ONLINE/OFFLINE button must be pressed for a minimum of 4 seconds for the

power off or power on to occur.

• Extractor clips—Control the locking system that secures the Routing Engine.

LEDs—"PTX5000 Routing Engine LEDs" on page 123

NOTE: For specific information about Routing Engine components (for example, the amount of

DRAM), issue the show chassis routing-engine command.

Routing Engine Boot Sequence

The Routing Engine boots from the storage media in this order: the USB device (if present), the

CompactFlash card CF (if present), the disk (if present) in slot 1 Disk1, and then the LAN.

NOTE: Disk2 is not currently supported on RE-DUO-C2600-16G but is supported on RE-PTX-

There is no support for the CompactFlash card in RE-PTX-X8-64G and RE-PTX-X8-128G.

Booting in an RE-PTX-X8-64G and RE-PTX-X8-128G Routing Engines follows this sequence—the USB

device, SSD1, SSD2, and LAN. SSD1 is the primary boot device. The boot sequence is tried twice for

SSD1 and SSD2.

describes the functions of these LEDs.

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