Ruijie RG-S6920-4C Series Installation and operating manual

Ruijie RG-S6920-4C Switch
Hardware Installation and Reference Guide
Document Version: V2.0
Date: July 31, 2023
Copyright © 2023 Ruijie Networks

Copyright
Copyright © 2023 Ruijie Networks
All rights are reserved in this document and this statement.
Any reproduction, excerption, backup, modification, transmission, translation or commercial
use of this document or any portion of this document, in any form or by any means, without the
prior written consent of Ruijie Networks is prohibited.
Trademark and are owned by Ruijie Networks.
All other trademarks or registered trademarks mentioned in this document are owned by their
respective owners.
Disclaimer
The products, services, or features you purchase are subject to commercial contracts and
terms. Some or all of the products, services or features described in this document may not be
within the scope of your purchase or use. Unless otherwise agreed in the contract, Ruijie
Networks does not make any express or implied statement or guarantee for the content of this
document.
Due to product version upgrades or other reasons, the content of this document will be
updated from time to time. Ruijie Networks reserves the right to modify the content of the
document without any notice or prompt.
This manual is for reference only. Ruijie Networks endeavors to ensure content accuracy and
will not shoulder any responsibility for losses and damages caused due to content omissions,
inaccuracies or errors.

I
Preface
Intended Audience
This document is intended for:
Network engineers
Technical support and servicing engineers
Network administrators
Technical Support
Ruijie Networks website: https://www.ruijienetworks.com/
Technical support website: https://ruijienetworks.com/support
Case portal: https://caseportal.ruijienetworks.com
Community: https://community.ruijienetworks.com
Technical support email: [e-mail]
Live chat: https://www.ruijienetworks.com/rita
Conventions
1. Signs
The signs used in this document are described as follows:
Danger
An alert that contains important safety instructions. Before you work on any equipment, be
aware of the hazards involved and be familiar with standard practices for preventing
accidents.
Warning
An alert that calls attention to important rules and information that if not understood or followed
can result in data loss or equipment damage.
Caution
An alert that calls attention to essential information that if not understood or followed can result
in function failure or performance degradation.
Note
An alert that contains additional or supplementary information that if not understood or
followed will not lead to serious consequences.

II
Specification
An alert that contains a description of product or version support.
2. Note
The manual offers configuration information (including model, port type and command line
interface) for indicative purpose only. In case of any discrepancy or inconsistency between the
manual and the actual version, the actual version prevails.

i
Contents
Preface.................................................................................................................................................. I
1Overview ........................................................................................................................................... 1
1.1 About the RG-S6920-4C............................................................................................................1
1.2 Component Modules..................................................................................................................1
1.3 Chassis ......................................................................................................................................2
1.3.1 Appearance....................................................................................................................2
1.3.2 LEDs ..............................................................................................................................5
1.3.3 Ports...............................................................................................................................7
1.3.4 Cooling...........................................................................................................................8
1.3.5 Technical Specifications.................................................................................................8
1.3.6 Asset Tag......................................................................................................................12
1.4 Expansion Modules .................................................................................................................13
1.4.1 M6900-16CQ4QC........................................................................................................13
1.4.2 M6900-32CQ................................................................................................................16
1.5 Power Module..........................................................................................................................18
1.5.1 RG-PA1200I-F..............................................................................................................18
1.6 Fan Module..............................................................................................................................21
1.6.1 M2EFAN I-F .................................................................................................................21
1.7 Cables......................................................................................................................................23
1.7.1 Console Cable .............................................................................................................23
1.7.2 Ethernet Cable.............................................................................................................24
1.7.3 Power Cord..................................................................................................................25
1.7.4 Grounding Wire............................................................................................................26

ii
1.8 Pluggable Modules..................................................................................................................27
2Preparing for Installation................................................................................................................. 29
2.1 Safety Guidelines.....................................................................................................................29
2.1.1 General Precautions....................................................................................................29
2.1.2 Chassis-Lifting Guidelines...........................................................................................29
2.1.3 Electricity Safety ..........................................................................................................30
2.1.4 Preventing ESD Damage.............................................................................................30
2.1.5 Laser Safety.................................................................................................................31
2.1.6 Storage Guidelines ......................................................................................................31
2.2 Site Requirements ...................................................................................................................31
2.2.1 Floor Loading...............................................................................................................31
2.2.2 Airflow...........................................................................................................................31
2.2.3 Space...........................................................................................................................31
2.2.4 Temperature.................................................................................................................32
2.2.5 Humidity.......................................................................................................................32
2.2.6 Cleanliness...................................................................................................................32
2.2.7 System Grounding.......................................................................................................33
2.2.8 Preventing Electromagnetic Interference ....................................................................35
2.2.9 Surge Protection..........................................................................................................35
2.3 Rack-Mounting Guidelines.......................................................................................................35
2.4 Tools ........................................................................................................................................36
2.5 Unpacking the Switch..............................................................................................................36
2.5.1 Verifying the Shipped Content.....................................................................................36
2.5.2 Unpacking the Container.............................................................................................37

iii
3Installing the Switch ........................................................................................................................ 39
3.1 Installation Procedure..............................................................................................................40
3.2 Installing the Rack....................................................................................................................41
3.2.1 Installation Guidelines..................................................................................................41
3.2.2 Procedure.....................................................................................................................41
3.3 Installing the Chassis...............................................................................................................42
3.3.1 Installation Guidelines..................................................................................................42
3.3.2 Mounting the Brackets.................................................................................................42
3.3.3 Mounting the Chassis on the Rack..............................................................................43
3.4 Installing the Protective Grounding Wire.................................................................................43
3.4.1 Installation Guidelines..................................................................................................43
3.4.2 Procedure.....................................................................................................................44
3.5 Installing and Removing the Fan Module................................................................................44
3.5.1 Installing the Fan Module.............................................................................................44
3.5.2 Removing the Fan Module...........................................................................................45
3.6 Installing and Removing the Expansion Module.....................................................................46
3.6.1 Installing the Expansion Module..................................................................................46
3.6.2 Removing the Expansion Module................................................................................47
3.7 Installing and Removing the Power Module............................................................................48
3.7.1 Installing the Power Module.........................................................................................48
3.7.2 Removing the Power Module.......................................................................................51
3.8 Installing and Removing the Pluggable Module......................................................................51
3.9 Verifying Installation.................................................................................................................52
3.10 Connecting the Power Cord ..................................................................................................52

iv
4Commissioning................................................................................................................................ 53
4.1 Setting Up the Configuration Environment..............................................................................53
4.2 Powering on the Device...........................................................................................................55
4.2.1 Checklist Before Power-on..........................................................................................55
4.2.2 Power-on......................................................................................................................55
4.2.3 Checklist Before Power-on..........................................................................................55
5Monitoring and Maintenance........................................................................................................... 56
5.1 Monitoring................................................................................................................................56
5.1.1 Monitoring the LEDs....................................................................................................56
5.1.2 Running the CLI Commands.......................................................................................56
5.2 Maintenance ............................................................................................................................57
5.2.1 Replacing the Power Module.......................................................................................57
5.2.2 Replacing the Fan Module...........................................................................................57
5.2.3 Replacing the Lithium Battery......................................................................................57
5.2.4 Replacing the Fuse......................................................................................................58
6 Troubleshooting............................................................................................................................ 59
6.1 Flowchart..................................................................................................................................59
6.2 Common Issues.......................................................................................................................60
6.2.1 Forgetting Login Password..........................................................................................60
6.2.2 AC Power Module Failure............................................................................................60
6.2.3 Fan Module Not Rotating.............................................................................................60
6.2.4 No Output on the Console...........................................................................................60
6.2.5 Garbled Output on the Console...................................................................................61
6.2.6 Optical Port Linkdown..................................................................................................61

v
7 Appendix........................................................................................................................................ 61
7.1 Labeling Process.....................................................................................................................61
7.1.1 Hand Writing on Labels................................................................................................61
7.1.2 Pasting Labels .............................................................................................................62
7.1.3 Label Contents.............................................................................................................63
7.2 Connectors and Media.............................................................................................................63
7.2.1 1000BASE-T Port ........................................................................................................64
7.2.2 100BASE-TX/10BASE-T Port......................................................................................65
7.3 Surge Protection......................................................................................................................66
7.3.1 Installing an AC PowerArrester...................................................................................66
7.3.2 Installing an Ethernet Port Arrester..............................................................................67
7.4 Site Selection...........................................................................................................................68
7.5 Recommended Cabling...........................................................................................................69

Hardware Installation and Reference Guide Overview
1
1 Overview
1.1 About the RG-S6920-4C
The RG-S6920-4C switch is a next-generation switch featuring high-performance, high-
density, and low-latency launched by Ruijie Networks for Artificial Intelligence (AI) and other
applications. The RG-S6920-4C switch provides a flexible modular design, 100GE/400GE
expansion modules, and diverse data center features. It can be used with Ruijie’s RG-S6500
switches for a high-performance and high-reliability data center network.
Table 1-1 RG-S6920-4C Overview
Chassis
100GE
QSFP28
Ports
400GE
QSFP-DD
Ports
Expansion
Module
Slots
Power
Redundancy
Fan
Redundancy
RG-S6920-4C
N/A
N/A
4
2+2
5+1
M6900-16CQ4QC
16
4
N/A
N/A
N/A
M6900-32CQ
32
N/A
N/A
N/A
N/A
Note
The product images involved in this manual are for indicative purpose only. The appearance is
subject to the actual equipment.
1.2 Component Modules
The RG-S6920-4C adopts the modular design. Compliant with industry standards, the design
differentiates modules and integrates module interfaces to ensure an integrated system with
independent function modules.
Table 1-2 Component Modules
Chassis
Expansion
Module
Power Module
Fan Module
RG-S6920-4C
M6900-16CQ4QC
RG-PA1200I-F
M2EFAN I-F

Hardware Installation and Reference Guide Overview
2
M6900-32CQ
Caution
Different power modules are interchangeable. That is, the switch allows concurrentAC
and HVDC input. For example, input 1 uses mains electricity (AC power) and input 2 use
Uninterrupted Power Supply (UPS) HVDC power.
Different expansion modules are not interchangeable.
1.3 Chassis
The RG-S6920-4C hardware system consists of a chassis, a power supply system, and a
cooling system.
Power supply system: provides four power module slots and supports 2+2 power
redundancy.
Cooling system: provides six fan module slots and supports 5+1 fan redundancy.
Expansion module: provides four expansion module slots and supports two models.
1.3.1 Appearance
1. Appearance
Front View of the RG-S6920-4C

Hardware Installation and Reference Guide Overview
3
Rear View of the RG-S6920-4C
2. Structure
Front Panel Structure
Table 1-3 Front Panel Components
No.
Component
1
Expansion module status LED
2
SFP28 port
3
SFP28 port LED

Hardware Installation and Reference Guide Overview
4
4
Captive screw
5
Handle
6
Ground for ESD-preventive wrist strap
Rear Panel Structure
Table 1-4 Rear Panel Components
No.
Component
1
Power module slot
2
Fan module slot
3
System status LED
4
BMC status LED
5
Fan status LED
6
Power status LED
7
Locating LED
8
USB 2.0 port
9
Management port
10
Console port

Hardware Installation and Reference Guide Overview
5
No.
Component
11
Grounding stud
12
Asset tag
13
Ground for ESD-preventive wrist strap
1.3.2 LEDs
Table 1-5 LEDs
Silkscreen
Label
LED
Description
SYS
System status
LED
Solid green: The system is operating normally.
Blinking green: The system is starting up.
Solid red: The system (including all modules) is not
functioning properly.
○At least two power or fan modules are not installed.
○At least two power modules are not connected with the
AC power cord.
○The temperature exceeds the limit and the switching
service resets.
Solid yellow:
○The temperature reaches the threshold.
○A power or fan module is not installed.
○A power module is not connected with theAC power
cord.
Off: The system is not receiving power or not operating
even after receiving power.
BMC
BMC status
LED
Solid green: The BMC module is operating normally.
Blinking green: The BMC module is starting up.
Off: The BMC module is not connected or not functioning
properly after being connected.
FAN
Fan status
Solid green: The fan module is operating normally.

Hardware Installation and Reference Guide Overview
6
Silkscreen
Label
LED
Description
LED
Blinking green: The fan module is starting up.
Solid red:
○The system (including all modules) is not functioning
properly.
○At least two fan modules are not installed.
○The temperature exceeds the limit and the switching
service resets.
Solid yellow:
○The temperature reaches the threshold.
○A fan module is not installed.
Off: The system is not receiving power or not operating
even after receiving power.
PWR
Power status
LED
Solid green:All power modules are operating normally.
Blinking green: The power modules are starting up.
Solid red:At least two power modules are not functioning
properly.
Solid yellow:A power module is not functioning properly.
Off: The system is not receiving power.
LINK/ACT
Management
port LED
Solid yellow: The port has made a successful 10/100 Mbps
link.
Blinking yellow: The port is sending and receiving traffic at
10/100 Mbps.
Solid green: The port has made a successful 1,000 Mbps
link.
Blinking green: The port is sending and receiving traffic at
1,000 Mbps.
Off: No link is detected for the port.

Hardware Installation and Reference Guide Overview
7
1.3.3 Ports
Table 1-6 Ports
Port
Connector Type
Description
Accessory
Management port
RJ45
The management port is
used to set up the onsite or
remote configuration
environment.
Standards compliance:
IEEE802.3ab
Working mode:
10/100/1000 Mbps with
auto-negotiation and full-
duplex
CAT5 or higher
cable
USB port
USB
The USB port is connected
with a USB flash drive for
configuration backup and
firmware upgrade.
USB 2.0
FAT32 file format
USB 2.0 flash drive
Console port
RJ45
The console port is
connected to a console for
onsite configuration.
Standards compliance:
RS-232
Working mode: Duplex
Universal Asynchronous
Receiver/Transmitter
(UART)
Baud rate:
○Range: 9,600 bit/s to
115,200 bit/s
○Default value: 9,600
bit/s
Console cable

Hardware Installation and Reference Guide Overview
8
1.3.4 Cooling
The S6920-4C adopts the front-to-rear airflow. Air flows in through the ports and out through
the power module, as shown in Figure 1-5.
Caution
Maintain a minimum clearance of 200 mm (7.87 in.) around the equipment for air
circulation.
At least three fan modules are required. If any slot is unoccupied, install a filler panel to
enable proper airflow and to keep dust out of the chassis.
Dust the equipment every three months to avoid blocking the ventilation openings on the
housing.
Front-to-Rear Airflow
1.3.5 Technical Specifications
Table 1-7 Technical Specifications
Class
Item
Specification
Technical
indicators
CPU
2.2 GHz quad-core
Memory
8 GB, DDR4 (compatible with 16 GB)
Flash memory
NOR flash: 16 MB
SSD
64 GB

Hardware Installation and Reference Guide Overview
9
Class
Item
Specification
Physical
characteristics
Dimensions
(W x D x H)
Without packing materials: 442 mm x 735 mm x 173.6
mm (17.40 in. x 28.94 in. x 6.83 in., 4 RU)
With packing materials: 600 mm x 980 mm x 407 mm
(23.62 in. x 38.58 in. x 16.02 in.)
Weight
Chassis and modules (six fan modules and four
power modules) without packing materials: 34.25 kg
(75.51 lbs.)
Chassis and modules (six fan modules and four
power modules) without packing materials: 43 kg
(94.80 lbs.)
Structure
Flexible module design
Four expansion module slots
Four power module slots
Six fan module slots
Ports
Service port
128 x 100GE ports (four M6900-32CQ modules)
16 x 400GE ports + 64 x 100GE ports (four M6900-
16CQ4QC modules)
Console port
1 x RJ45 port
USB port
1 x UBS 2.0 port
Management
port
1 x Gigabit RJ45 port supporting backward compatibility
Environment
Altitude
Operating altitude: 0–5,000 m (16,404.20 ft.)
Storage altitude: 0–5,000 m (16,404.20 ft.)
Temperature
Operating temperature: 0°C to 40°C (32°F to 104°F)
at an altitude in the range of 0–2,000 m (0–6,561.68
ft.)
Note
At an altitude in the range of 2,000–5,000 m
(6,561.68–16,404.20 ft.), every time the altitude
increases by 200 m (656.17 ft.), the maximum
temperature decreases by 1°C (1.8°F).

Hardware Installation and Reference Guide Overview
10
Class
Item
Specification
Storage temperature: –40°C to +70°C (–40°F to
+158°F)
Humidity
Operating humidly: 10% RH to 90% RH (non-
condensing)
Storage humidity: 5% RH to 95% RH (non-
condensing)
Noise
Sound pressure level at 27°C(80.6°F): < 78 dB
Surge
protection
AC power protection
Common mode: 2 kV
Differential mode: 1 kV
Power supply
Power supply
mode
AC
High-voltage DC (HVDC)
Power
connector
C14 three-pin connector
Power
consumption
Max: 1,950 W
Typical: 1,469 W
Static: 516 W
Voltage
AC: 100 VAC to 240 V AC, 50 Hz to 60 Hz
HVDC: 180 V DC to 300 V DC
AC input
RG-PA1200I-F:
Rated voltage: 110 V AC/220 V AC
Frequency range: 50 Hz to 60 Hz
Max. voltage range: 90 VAC to 264 VAC (47 Hz to
63 Hz)
Rated voltage range: 100 VAC to 127 V AC; rated
current: 13.8 A
Rated voltage range: 200 VAC to 240 V AC; rated
current: 8.5 A

Hardware Installation and Reference Guide Overview
11
Class
Item
Specification
DC input
RG-PA1200I-F:
HVDC range: 180 V DC to 300 V DC
Rated voltage: 240 V DC
Rated current: 6.5 A
Max. output
power
consumption
RG-PA1200I-F:
Rated voltage range: 100 V AC to 127 V AC; power:
1,000 W
Rated voltage range: 200 VAC to 240 VAC; power:
1,300 W
Rated voltage range: 180 V DC to 300 V DC; power:
1,300 W
Airflow
direction
RG-PA1200I-F: Front-to-rear airflow (air exhaust on power
module panel)
Cooling
Cooling mode
Fan cooling
Fan type
Swappable fan
Reliability
Mean Time to
Recovery
(MTTR)
0.5 hours
Power
redundancy
2+2
Fan
redundancy
5+1
Hot swapping
Hot swappable power and fan modules
Certification
EMC
GB/T 9254.1
Safety standard
GB 4943.1
Environment
protection
Environment protection regulation