Juniper EX4100-48P/T User manual

Letter of Volatility
Letter of Volatility
IDENTIFICATION OF VOLATILE
AND NON-VOLATILE STORAGE
AND
SANITIZATION OF SYSTEM
COMPONENTS
JUNIPER NETWORKS
EX4100-48P/T
REVISION 1.0
December 27, 2022

Letter of Volatility EX4100-48P/T 1/4/2023
UNCLASSIFIED
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
3VOLATILE AND NON-VOLATILE MEMORIES ........................................2
3.1 Power Down and Removal of memory devices..........................................3
4System Power Down ................................................................................3
4.1 Disassembly of the EX4100-48P/T Chassis and Identification of NV
storage.........................................................................................................3
5Follow the assembly procedure in reverse order to assemble the
EX4100-48P/T Chassis................................................................................7
TABLE OF FIGURES
Figure 2 1: EX410048PT……...……………………………………………………2
Figure 4 1: PSU FRUs……………………………………………………………...3
Figure 4 2: Top cover screws……………………………………………………...4
Figure 4 3: Side screws of Top Cover…………………………………………….5
Figure 4 5: Locate On-Board memory Chip and Battery………………………..8
Figure 4 6: Locate NV storage (eUSB)…………………………………….……..8
Figure 4 7: Locate NIC internal Firmware Flash and Mainboard EEPROM)…8
Figure 4 6: Locate MainBoard - CPLD and Uboot SPI Flash……………..……9

Letter of Volatility EX4100-48P/T 1/4/2023
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1 INTRODUCTION
1.1 Purpose
The purpose of this document is to provide direction to identify and remove all
non-volatile (NV) storage from the Juniper Networks EX4100-48PT platform.
Non-Volatile (NV) storage is a system memory that can store user data
information and system configuration data even when system not powered.
Volatile (V) storage is a system memory that only retains data or its contents
while system powered but when system powered off or interrupted, its data or
contents are immediately lost.
1.2 Scope
This document only addresses the EX4100-48P/T platform. While other
platforms offered by Juniper Networks may contain similar hardware
components, this document only applies to these devices. Furthermore, this
document only provides direction for the identification and removal of NV
storage components. It does not address destruction procedures for those
components. As all the NV storage components used in the EX4100-48P/T are
commercial off-the-shelf (COTS) components, directions for destruction of
those components are left to the governing Department, Agency, or Office.
2 EQUIPMENT OVERVIEW
2.1 Identification of Chassis
Juniper Networks EX4100-48P/T Ethernet Switches provide connectivity for
high-density environments and scalability for growing networks. These
switches can be deployed wherever you need high density of Gigabit Ethernet
ports or redundancy. Typically, EX4100-48P/T switches are used in large
branch offices, campus wiring closets, and data centers. In datacenters,
EX4100-48P/T switches can be positioned as top-of-rack switches; the top
devices in a rack to provide connectivity for all the devices in the rack. Juniper
Networks SRX Series Ethernet Switches run Junos OS, which provides Layer2
and Layer3 switching, routing, and security services.
The 48-ports EX4100-48P/T switch with gigabit ports and provide built-in
Ethernet network ports, 0-47 built-in 1G ports, 0-3 built-in 4x10G SFP+
(Uplink-ports), 0-3 built-in 4x25G SFP28 (Stack ports) Ethernet network ports.
Ethernet network ports support 1Gbps,10Gbps and 25G speeds. EX4100-
48P/T is designed to fit in a standard 19" rack.

Letter of Volatility EX4100-48P/T 1/4/2023
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Figure 2-1: EX4100-48P/T
2.2 Description of Field Replaceable Units (FRU)
The power supply and transceivers are hot-swappable. You can remove and
replace them without powering off the system or disrupting system functions.
None of these components contain NV RAM. All NV RAM is either soldered or
installed onto the system board.
3 VOLATILE AND NON-VOLATILE MEMORIES
This section covers the identification of volatile and non-volatile memories on
EX4100-48P/T system.
Main Board:
Non-volatile devices are listed below.
CONN 13 - eUSB (System storge) –stores user data.
U136, 137 - Uboot (SPI Flash)
U21 - IDEEPROM
U33 - Main-board CPLD
U192 - Golden CPLD
Volatile devices are listed below.
U14, U17, U22, U31, U34 - On Board DDR Memory
BA1, U140 - RTC battery

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3.1 POWER DOWN AND REMOVAL OF MEMORY DEVICES
To ensure that no user data or system configurations remain reside on a
EX4100-48P/T platform, the following steps must be performed:
1. Power must be removed from the system to clear all volatile storage.
2. Volatile and Non-volatile memory components must be removed
from the system board.
Following section provides the instructions on how to remove these
components in detail.
4 SYSTEM POWER DOWN
Power down the system by removing any connected power cords from power
supply.
4.1 Disassembly of the EX4100-48P/T Chassis and Identification of NV
storage
The EX4100-48P/T does contain NV storages that is replaceable as well as it
is soldered to the system board. To access the memory for removal, refer to
the following steps:
1. Removing ear-mounts on both left and right side.
2. Remove power supplies Blank PSU, from the system (figure 3-1)
a. Move latch towards PSU Handle and Pull PSU out of Chassis.
b. Unfasten the captive screws and remove the Blank PSU.
Figure 4-1: PSU FRUs

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3. Remove thirteen screws on top side (figure 4-2)
Figure 4-2: Top cover screws
(Figure 4-3) Slide and lift to remove the Top cover.

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Figure 4-4: Side screws of Top Cover
4. Locate Volatile On Board memory (U14), and System CPLD (U33)on
the
Main Board (figure 4-5)
Figure 4-5: Locate On Board Memory and System CPLD

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5.Locate NON-Volatile storage on Main Board and RTC Battery (figure 4-6).
Figure 4-6: Locate NV storage (eUSB & RTC Battery)
5. System Main Board ID EEPROM
Top side (figure 4-7).
Figure 4-7: Locate NIC System Mainboard EEPROM

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6. Locate Uboot SPI FLASH (Bottom side) and Golden CPLD FW (Bottom
Side ) from the Main Board Top Side (figure 4-8).
Figure 4.8: CPU-CPLD and Uboot SPI Flash
NOTE : Before removal, ensure J-TAC and the appropriate account team has
been notified of your intentions.
5 FOLLOW THE ASSEMBLY PROCEDURE IN REVERSE ORDER TO
ASSEMBLE THE EX4100-48P/T CHASSIS.