Juniper EX4100-48P/T User manual

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

Letter of Volatility EX4100-48P/T 1/4/2023

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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

Letter of Volatility EX4100-48P/T 1/4/2023

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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.

Letter of Volatility EX4100-48P/T 1/4/2023

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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

Letter of Volatility EX4100-48P/T 1/4/2023

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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

Letter of Volatility EX4100-48P/T 1/4/2023

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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.

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