Juniper QFX5120-48Y User manual

UNCLASSIFIED
Identification of volatile and
non-volatile storage and
sanitization of system
components
JUNIPER NETWORKS
QFX5120-48Y
REVISION 1.0
Jan 03, 2019

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TABLE OF CONTENTS
1Introduction................................................................................................................1
1.1 Purpose...............................................................................................................1
1.2 Scope...................................................................................................................1
2Equipment Overview................................................................................................1
2.1 Identification of Chassis....................................................................................1
2.2 Description of Field Replaceable Units (FRU)..............................................2
3Power Down and Removal of Non-Volatile Storage...........................................2
3.1 System Power Down.........................................................................................2
3.2 Disassemblyof the QFX5120-48YChassis and Identification of NV
storage...........................................................................................................................2
3.3 Remove Non-volatile components from the System Board......................13
3.4 Follow theassembly procedure in reverse order to assemble the
QFX5120-48Y Chassis..............................................................................................13
TABLE OF FIGURES
Figure 1 QFX5120-48Y Front view................................................................................2
Figure 2 QFX5120-48Y PSU FRUs and FAN FRUs..................................................3
Figure 3 Top cover screws –Top view.........................................................................3
Figure 4 Screws on left and right side of the system..................................................4
Figure 5 Top cover screws on bottom side..................................................................4
Figure 6 Slide & lift the top Cover..................................................................................5
Figure 7 Locating and removing main board...............................................................6
Figure 8 Locating main board heatsink supportplate ................................................7
Figure 9 Main board heatsink support plate removed................................................7
Figure 10 Main board SPI device for CPLD and FPGA.............................................8
Figure 11 Main board IDEEPROM................................................................................8
Figure 12 Main board QSPI device ...............................................................................9
Figure 13 CPU Board volatile and non-volatile memory devices...........................10
Figure 14 M.2 SATA SSD device on CPU Board.....................................................11
Figure 15 BIOS devices on CPU Board.....................................................................12
Figure 16 Management EEPROM on CPU Board....................................................12
Figure 17 CPU board IDEEPROM and CPLD SPI Flash........................................13

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1 INTRODUCTION
1.1 Purpose
The purpose of thisdocumentis to provide direction to identifyandremove all
non-volatile (NV)storage from the Juniper NetworksQFX5120-48Y platform.
Non-Volatile (NV)storage is a system memory that can store user data
information andsystem configurationdataeven when system notpowered.
Volatile(V) storage is a system memory that onlyretains data or its contents
while system powered but when systempowered off or interrupted, its data or
contentsare immediatelylost.
1.2 Scope
This documentonlyaddresses theQFX5120-48Y platform. Whileother
platforms offered by JuniperNetworksmay contain similarhardware
components,thisdocumentonly appliesto these devices. Furthermore, this
documentonly provides direction for the identification and removal of NV storage
components. It does not address destruction proceduresfor thosecomponents.
As all of the NV storage componentsusedin the QFX5120-48Y are commercial
off-the-shelf (COTS) components,directionsfor destruction of those components
are leftto the governingDepartment,Agency,or Office.
2 EQUIPMENT OVERVIEW
2.1 Identification of Chassis
QFX5120-48Y delivers low latency, native 25GbE, rich Layer 2 and Layer
3 features, VXLAN overlay support, and 100GbE uplinks, making it the
ideal switch for access and top-of-rack deployments.
The high-density 10GbE, 25GbE, 40GbE, and 100GbE ports also make
the QFX5120-48Y ideally suited for deployment as leaf-and-spine and leaf
topologies.
QFX5120-48Y has 48x25G + 8x100G fixed ports and it can be mounted in
a 19" rack.

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Figure 1 QFX5120-48Y Front view
2.2 Description of Field Replaceable Units (FRU)
The power supply, fan tray, and transceivers are hot swappable. You can
remove and replace them without powering off the system or disrupting
system functions.
None of these components contains stores user or system configuration
data. All NV RAM is either soldered or installed onto the system board.
3 POWER DOWN AND REMOVAL OF NON-VOLATILE STORAGE
In order to ensurethat nouser data or system configurationsremain residenton
QFX5120-48Y platform, the followingstepsmust be performed:
1. Power must be removed from the system to clear all volatilestorage
2. Onlythe SATA SSD modulesmust be removed as they store userand
configurationdata
3. Other SPI Flash / EEPROM componentsshown forreference only, they
don’t store anyuser or configuration data
A detailed process is includedin thefollowingsections.
3.1 System Power Down
Power down the system by removing anyconnectedpower cords from power
supply.
3.2 Disassembly of the QFX5120-48Y Chassis and Identification of NV
storage
QFX5120-48Y does contain NV storages that is replaceableas well as it is
soldered to thesystem board. In order to access the memory for removal, refer
to thefollowingsteps:

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i. Remove the power suppliesfromthe system.
ii. Removing ear-mountson both left andrightside
iii. Remove power suppliesandFan modulesfrom the system. Refer figure2
a. Move latch towards PSU Handle and Pull PSU outof Chassis.
b. Unfasten thecaptivescrews for each fan FRU andpull outthe Fan
FRU out of the chassis.
Figure 2 QFX5120-48Y PSU FRUs and FAN FRUs
iv. Remove twelve screws from thetop of thesystem and6 + 6 screws on
left & right sideof the system. One screw on thebottom side of the
system. ReferFigure 3.
Top cover screws
Figure 3 Top cover screws –Top view

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Front panel screw
Top cover screws
Front panel screws
Top cover screws
Figure 4 Screws on left and right side of the system
Top cover
screws on
Bottom side
CPU Board Heatsink support
plate attachment. These screws
need not to be removed unless
CPU board required to be
removed from system.
Figure 5 Top cover screws on bottom side.

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v. Gently slidetop cover towards fan side then liftto remove the Top cover
as show in Figure6
1. Slide top cover
2. Lift top cover
Figure 6 Slide & lift the top Cover
vi. RemovingMain board.
a. PSUsneedsto be removed from system prior to removal of main
board.
b. Ensurefrontpanel screws were removed; holdthe front panel both
edges andpull-outto remove the front panel.
c. Remove main board 15x screws (highlightedin redcolor circle) and
3x hex standoff (highlightedin aquacolorcircle)
d. Holdthe main board gentlyandpull-upwardsto remove themain
board

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5mm Hex standoff
Main board screws
MAC Heatsink screws
Hold front panel cover on both hands and pull outward to remove front panel
Main Board
CPU Board
PSUs
FANs
Figure 7 Locating and removing mainboard
e. Heat sinksupport plate on bottom side of main board. Unfasten the
MAC heat sinkscrews (4x) to remove heat sinksupport plate.
Note: Heatsinkneednotbe detached for removingsupport plate.

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Mainboard
Heatsink support Backplate
Figure 8 Locating mainboard heatsink support plate
Figure 9 Main board heatsink support plate removed

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vii. Non-volatile memory on main board.
QFX5120-48Y mainboard non-volatile devices shall notstore anyuser or
configurationdata.The location indication arefor reference.
a. Locate SPI Flash devicefor PowerCPLDandFPGA on main board
Figure 10 Main board SPI device for CPLD and FPGA
b. Locate IDEEPROMdevice andit does not store userinformation.
Figure 11 Main board IDEEPROM

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c. MAC QSPI flash locatedin bottom side of Main board. Heatsink
supportplate needsto be removed for accessingthecomponent.
Figure 12 Main board QSPI device

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viii. CPU Board VolatileandNon-Volatilecomponents.
A. Volatiledevice:
a. DDR Modules
b. Real time clock module –Battery
B. Non-volatiledevice:
a. SATA SSD –store user andsystem configurations
b. BIOS Flash
c. Managementport EEPROM
d. CPLD SPI Flash andCPU board IDEEPROM.
CPLD SPI
Flash CPU
IDEEPROM
BIOS Primary
& Secondary
M.2 SATA SSD
Stores User and config data
RDIMM
Volatilememory
Realtime
Clock b attery
Management
ports EERPOM
CPU
Heatsink
Screws
CPU Heatsink
Figure 13 CPU Board volatile and non-volatilememorydevices

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Non-Volatile memory on CPU Board:
a. Locate M.2 SATA SSD device that store the userand configdata.
Mainboardshouldberemoved from system to access SATA SSDdevice.
Note: Remove thescrew andunplugtheSATAFlash Modules from its
socket.
Figure 14 M.2 SATA SSD device on CPU Board.
b. BIOS devicesare located underCPU heatsink.
CPU heatsinkneedsto be removed for accessingBIOS deviceson CPU
board.
Unfasten theCPU heatsink screws then gently remove the CPU heatsink
from the CPU board.

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Figure 15 BIOS deviceson CPU Board.
c. Locate Managementport EEPROM device on CPU board.
Figure 16 Management EEPROM on CPU Board.
d. Locate CPLD SPI Flash and CPU board IDEEPROM. These devices shall
not store anyuser configuration data.

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Figure 17 CPU board IDEEPROM and CPLD SPI Flash
3.3 Remove Non-volatile componentsfrom the System Board
a. Remove the screw andunplugthe M.2 SATA SSD module from its
socket. (Figure 14)
Note: Before removal, ensure J-TAC and the appropriate account team has
been notified of your intentions.
3.4 Follow the assembly procedure in reverse order to assemble the
QFX5120-48Y Chassis.