HP 5120 48G, E5500-48-POE, 5120 SI, 5120 EI User Manual
HP 5120 EI & 5120 SI Switch Series
Installation Guide
Part number: 5998-1773
Document version: 6W102-20121111
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Contents
Product overview·························································································································································· 1
5120-24G EI (2 slots)/5120-24G EI TAA (2 slots) panel views ·················································································2
5120-48G EI (2 slots)/5120-48G EI TAA (2 slots) panel views ·················································································3
5120-24G EI panel views················································································································································4
5120-48G EI panel views················································································································································5
5120-24G-PoE+ EI (2 slots)/5120-24G-PoE+ EI TAA (2 slots) panel views······························································6
5120-48G-PoE+ EI (2 slots)/5120-48G-PoE+ EI TAA (2 slots) panel views······························································7
5120-8G SI panel views ··················································································································································8
5120-16G SI panel views ···············································································································································8
5120-24G SI panel views ···············································································································································9
5120-48G SI panel views ···············································································································································9
5120-8G-PPoE+ SI panel views ···································································································································10
5120-8G-PoE+ SI panel views ····································································································································· 10
5120-24G-PPoE+ SI panel views ································································································································· 11
5120-24G-PoE+ SI panel views ··································································································································· 12
Preparing for installation ···········································································································································13
Safety recommendations ··············································································································································· 13
Examining the installation site ······································································································································ 13
Temperature/humidity ·········································································································································· 13
Cleanness······························································································································································· 14
EMI·········································································································································································· 14
Laser safety····························································································································································· 14
Installation tools······························································································································································ 15
Installing the switch····················································································································································16
Installing a 5120 EI switch in a 19-inch rack ············································································································· 17
Mounting brackets················································································································································· 17
Rack-mounting by using only front mounting brackets ······················································································ 18
Rack-mounting by using front mounting brackets and a rack shelf·································································· 20
Rack-mounting by using front and rear mounting brackets··············································································· 21
Installing a 5120 SI switch in a 19-inch rack ············································································································· 24
Mounting brackets and mounting positions········································································································ 25
Attaching the mounting brackets to the switch chassis······················································································ 25
Rack-mounting the switch······································································································································ 28
Mounting the switch on a workbench·························································································································· 30
Mounting the switch to a wall······································································································································· 30
Introduction to wall anchor kit ·····························································································································31
Installation procedure············································································································································ 31
Mounting the switch through magnet mounting·········································································································· 32
Introduction to magnetic mounting kit ················································································································· 32
Installation procedure············································································································································ 33
Grounding the switch ···················································································································································· 34
Grounding the switch with a grounding strip····································································································· 34
Grounding the switch with a grounding conductor buried in the earth ground············································· 36
Grounding the switch by using the AC power cord·························································································· 37
Connecting the power cord ·········································································································································· 38
Connecting the AC power cord··························································································································· 38
Connecting the switch to a +12 VDC output RPS······························································································ 39
Connecting the switch to a –52 to –55 VDC output RPS·················································································· 40
i
Installing/removing an interface card (only for the 5120 EI switches) ···································································· 41
Installing an interface card··································································································································· 41
Removing an interface card ································································································································· 42
Installing/removing a dedicated CX4/SFP+ cable ··························································································· 42
Verifying the installation················································································································································ 43
Accessing the switch for the first time·······················································································································44
Setting up the configuration environment ···················································································································· 44
Connecting the console cable ······································································································································ 44
Console cable························································································································································ 44
Connection procedure ·········································································································································· 44
Setting terminal parameters ·········································································································································· 45
Powering on the switch·················································································································································· 48
Verification before power-on ·······························································································································48
Powering on the switch········································································································································· 48
Changing the startup mode·································································································································· 50
Setting up an IRF fabric ·············································································································································53
IRF fabric setup flowchart·············································································································································· 53
Planning IRF fabric setup··············································································································································· 54
Planning IRF fabric size and the installation site································································································ 54
Identifying the master switch and planning IRF member IDs ············································································ 54
Planning IRF topology and connections·············································································································· 55
Identifying physical IRF ports on the member switches ····················································································· 56
Planning the cabling scheme ·······························································································································57
Configuring basic IRF settings······································································································································· 59
Connecting the physical IRF ports ································································································································ 60
Accessing the IRF fabric to verify the configuration ··································································································· 60
Maintenance and troubleshooting····························································································································61
Password loss ································································································································································· 61
Console login password loss ·······························································································································61
Boot ROM password loss ····································································································································· 61
Power supply failure ······················································································································································ 61
Fan failure (only for the 5120 EI switches) ················································································································· 63
Configuration terminal problems·································································································································· 63
Appendix A Technical specifications························································································································64
Physical specifications ··················································································································································· 64
Chassis dimensions and weights ························································································································· 64
Ports and interface card slots ······························································································································· 64
Environmental specifications ········································································································································· 65
Power specifications ······················································································································································ 65
Power input types ·················································································································································· 65
AC input voltage specifications ··························································································································· 66
RPS DC input voltage specifications and RPS compatibility ············································································· 66
Power consumption specifications for non-PoE switches··················································································· 66
Power consumption specifications for PoE switches ·························································································· 67
Cooling system ······························································································································································· 67
Appendix B FRUs and compatibility matrixes··········································································································69
Interface cards (only for the 5120 EI switches) ··········································································································69
SFP/SFP+/XFP transceiver modules and SFP+/CX4 cables (only for the 5120 EI switches)································ 69
GE SFP transceiver modules································································································································· 70
10-GE SFP+ transceiver modules························································································································· 70
SFP+ cables···························································································································································· 71
10-GE XFP transceiver modules ··························································································································· 72
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CX4 cables····························································································································································· 72
SFP transceiver modules and SFP Stacking Kit (only for the 5120 SI switches)······················································ 73
Appendix C Ports and LEDs ······································································································································75
Ports ················································································································································································· 75
Console port··························································································································································· 75
10/100/1000Base-T Ethernet port ···················································································································· 75
SFP port ·································································································································································· 75
Combo interface (only available on the 5120 EI switches)·············································································· 76
LEDs (for the 5120 EI switches) ···································································································································· 76
System status LED··················································································································································· 76
RPS status LED························································································································································ 77
Port mode LED························································································································································ 77
Seven-segment LED················································································································································ 77
10/100/1000Base-T Ethernet port LED············································································································· 79
SFP port LED··························································································································································· 79
Interface card status LED······································································································································· 80
LEDs (for the 5120 SI switches) ···································································································································· 80
Power LED ······························································································································································ 80
RPS status LED························································································································································ 81
Port mode LED························································································································································ 81
10/100/1000Base-T Ethernet port LED············································································································· 81
1000Base-X SFP port LED····································································································································· 83
Support and other resources ·····································································································································84
Contacting HP ································································································································································ 84
Subscription service ·············································································································································· 84
Related information························································································································································ 84
Documents······························································································································································ 84
Websites································································································································································· 84
Conventions ···································································································································································· 85
Index ···········································································································································································87
iii
Product overview
The HP 5120 EI Switch Series includes the models in Table 1, and the HP 5120 SI Switch Series includes
the models in Table 2.
Table 1 Models in the
HP 5120 EI Switch Series
Type Product code HP description Alias
JE066A HP 5120-24G EI Switch 5120-24G EI
JE067A HP 5120-48G EI Switch 5120-48G EI
HP 5120-24G EI Switch with 2 Interface
Slots
HP 5120-24G EI TAA Switch with 2
Interface Slots
HP 5120-48G EI Switch with 2 Interface
Slots
HP 5120-48G EI TAA Switch with 2
Interface Slots
HP 5120-24G-PoE+ EI Switch with 2
Interface Slots
HP 5120-24G-PoE+ EI TAA Switch with 2
Interface Slots
HP 5120-48G-PoE+ EI Switch with 2
Interface Slots
HP 5120-48G-PoE+ EI TAA Switch with 2
Interface Slots
5120-24G EI (2 slots)
5120-24G EI TAA (2 slots)
5120-48G EI (2 slots)
5120-48G EI TAA (2 slots)
5120-24G-PoE+ EI (2 slots)
5120-24G-PoE+ EI TAA (2
slot)
5120-48G-PoE+ EI (2 slots)
5120-48G-PoE+ EI TAA (2
slots)
Non-PoE
PoE
JE068A
JG245A
JE069A
JG246A
JG236A
JG247A
JG237A
JG248A
Table 2 Models in the HP 5120 SI Switch Series
Type
Non-PoE
PoE
Product
code
JE073A HP 5120-16G SI Switch 5120-16G SI
JE074A HP 5120-24G SI Switch 5120-24G SI
JE072A HP 5120-48G SI Switch 5120-48G SI
JG308A HP 5120-8G SI Switch 5120-8G SI
JG092A HP 5120-24G-PPoE+ SI Switch 5120-24G-PPoE+ SI
JG091A HP 5120-24G-PoE+ SI Switch 5120-24G-PoE+ SI
JG310A HP 5120-8G-PPoE+ SI Switch 5120-8G-PPoE+ SI
JG309A HP 5120-8G-PoE+ SI Switch 5120-8G-PoE+ SI
HP description Alias
1
g
IMPORTANT:
For regulatory identification purposes, the HP 5120-8G SI, HP 5120-8G-PPoE+ SI, and HP
5120-8G-PoE+ SI products are assigned Regulatory Model Numbers (RMN). The Regulatory Model
Numbers for these products are listed below. These re
ulatory numbers should not be confused with the
marketing names HP 5120, or product numbers JG308A, JG310A, and JG309A.
Table 3 Regulatory Model Numbers in the HP 5120 8G SI Switch Series
Product code RMN HP description
JG308A BJNGA-AD0006 HP 5120-8G SI Switch
JG310A BJNGA-AD0007 HP 5120-8G-PPoE+ SI Switch
JG309A BJNGA-AD0008 HP 5120-8G-PoE+ SI Switch
This chapter describes the chassis panel views of the 5120 EI and 5120 SI switches.
5120-24G EI (2 slots)/5120-24G EI TAA (2 slots) panel views
Figure 1 Front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port
(2) 10/100/1000Base-T Ethernet port LED
(3) 1000Base-X SFP port (4) 1000Base-X SFP port LED
(5) Console port (6) Seven-segment LED (Unit)
(7) Port mode LED (Mode) (8) System status LED (PWR)
(9) RPS status LED (RPS) (10) Interface card 1 status LED (MOD1)
(11) Interface card 2 status LED (MOD2) (12) Port LED mode switching button
Figure 2 Rear panel
(1) AC-input power receptacle (2) RPS receptacle (shipped with a protective cover)
2
(3) Grounding screw (4) Interface card slot 1 (MOD1)
(5) Interface card slot 2 (MOD2)
NOTE:
The 5120-24G EI (2 slots) and 5120-24G EI TAA (2 slots) switches come with the expansion interface
card slots covered by filler panels.
5120-48G EI (2 slots)/5120-48G EI TAA (2 slots) panel views
Figure 3 Front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port
(2) 10/100/1000Base-T Ethernet port LED
(3) Console port (4) Seven-segment LED (Unit)
(5) Port mode LED (Mode) (6) System status LED (PWR)
(7) RPS status LED (RPS) (8) Interface card 1 status LED (MOD1)
(9) Interface card 2 status LED (MOD2) (10) Port LED mode switching button
(11) 1000Base-X SFP port (12) 1000Base-X SFP port LED
Figure 4 Rear panel
(1) AC-input power receptacle (2) RPS receptacle (shipped with a protective cover)
(3) Grounding screw (4) Interface card slot 1 (MOD1)
(5) Interface card slot 2 (MOD2)
NOTE:
The 5120-48G EI (2 slots) and 5120-48G EI TAA (2 slots) switches come with the expansion interface
card slots covered by filler panels.
3
5120-24G EI panel views
Figure 5 Front panel
(1) 10/100/1000Base-T auto-sensing Ethernet
port
(3) SFP port (4) SFP port LED
(5) Console port (6) Seven-segment LED (Unit)
(7) Port mode LED (Mode) (8) System status LED (PWR)
(9) RPS status LED (RPS) (10) Port LED mode switching button
(2) 10/100/1000Base-T Ethernet port LED
Figure 6 Rear panel
(1) AC-input power receptacle (2) RPS receptacle
(3) Grounding screw (4) “DO NOT REMOVE” label
CAUTION:
The 5120-24G EI switch does not support interface cards.
To ensure good ventilation, do not remove the
interface card slot filler panels.
4
5120-48G EI panel views
Figure 7 Front panel
(1) 10/100/1000Base-T auto-sensing Ethernet
port
(3) Console port (4) Seven-segment LED (Unit)
(5) Port mode LED (Mode) (6) System status LED (PWR)
(7) RPS status LED (RPS) (8) Port LED mode switching button
(9) SFP port (10) SFP port LED
(2) 10/100/1000Base-T Ethernet port LED
Figure 8 Rear panel
(1) AC-input power receptacle (2) RPS receptacle (with filler panel)
(3) Grounding screw (4) “DO NOT REMOVE” label
CAUTION:
The 5120-48G EI switch does not support interface cards.
5
5120-24G-PoE+ EI (2 slots)/5120-24G-PoE+ EI TAA (2 slots) panel views
Figure 9 Front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port
(2) 10/100/1000Base-T Ethernet port LED
(3) 1000Base-X SFP port (4) 1000Base-X SFP port LED
(5) Console port (6) Seven-segment LED (Unit)
(7) Port mode LED (Mode) (8) System status LED (PWR)
(9) RPS status LED (RPS) (10) Interface card 1 status LED (MOD1)
(11) Interface card 2 status LED (MOD2) (12) Port LED mode switching button
Figure 10 Rear panel
1 2 3 4 5
(1) RPS receptacle (2) AC-input power receptacle
(3) Grounding screw (4) Interface card slot 1 (MOD1)
(5) Interface card slot 2 (MOD2)
NOTE:
The 5120-24G-PoE+ EI (2 slots) and 5120-24G-PoE+ EI TAA (2 slots) switches come with the expansion
interface card slots covered by filler panels.
6
5120-48G-PoE+ EI (2 slots)/5120-48G-PoE+ EI TAA (2 slots) panel views
Figure 11 Front panel
1 2 3 4 5
101112
(1) 10/100/1000Base-T auto-sensing Ethernet port
(2) 10/100/1000Base-T Ethernet port LED
(3) Console port (4) Seven-segment LED (Unit)
(5) Port mode LED (Mode) (6) System status LED (PWR)
(7) RPS status LED (RPS) (8) Interface card 1 status LED (MOD1)
(9) Interface card 2 status LED (MOD2) (10) Port LED mode switching button
(11) 1000Base-X SFP port (12) 1000Base-X SFP port LED
6
7
8
9
Figure 12 Rear panel
(1) RPS receptacle (2) AC-input power receptacle
(3) Grounding screw (4) Interface card slot 1 (MOD1)
(5) Interface card slot 2 (MOD2)
NOTE:
The 5120-48G-PoE+ EI (2 slots) and 5120-48G-PoE+ EI TAA (2 slots) switches come with the expansion
interface card slots covered by filler panels.
7
5120-8G SI panel views
Figure 13 Front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port (2) 1000Base-X SFP port
(3) Console port (4) Port LED
(5) Power LED (Power)
Figure 14 Rear panel
(1) AC-input power receptacle (2) Grounding screw
5120-16G SI panel views
Figure 15 Front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port (2) 1000Base-X SFP port
(3) Console port (4) Port LED
(5) Power LED (Power)
Figure 16 Rear panel
(1) AC-input power receptacle (2) Grounding screw
8
5120-24G SI panel views
Figure 17 Front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port (2) 1000Base-X SFP port
(3) Console port (4) Port LED
(5) Power LED (Power)
Figure 18 Rear panel
(1) AC-input power receptacle (2) Grounding screw
5120-48G SI panel views
Figure 19 Front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port
(2) 10/100/1000Base-T Ethernet port LED
(3) Console port (4) Power LED (Power)
(5) 1000Base-X SFP port (6) 1000Base-X SFP port LED
Figure 20 Rear panel
(1) AC-input power receptacle (2) Grounding screw
9
5120-8G-PPoE+ SI panel views
Figure 21 Front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port (2) Port LED mode switching button
(3) Port LED (4) Power LED (Power)
(5) Port mode LED (6) Console port
(7) 1000Base-X SFP port
Figure 22 Rear panel
(1) AC-input power receptacle (2) Grounding screw
5120-8G-PoE+ SI panel views
Figure 23 Front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port (2) Port LED mode switching button
(3) Port LED (4) Power LED (Power)
(5) Port mode LED (6) Console port
(7) 1000Base-X SFP port
10
Figure 24 Rear panel
(1) AC-input power receptacle (2) Grounding screw
5120-24G-PPoE+ SI panel views
Figure 25 Front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port (2) Port LED mode switching button
(3) Port LED (4) Power LED (Power)
(5) Port mode LED (6) Console port
(7) 1000Base-X SFP port
Figure 26 Rear panel
(1) AC-input power receptacle (2) Grounding screw
11
5120-24G-PoE+ SI panel views
Figure 27 Front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port (2) Port LED mode switching button
(3) RPS status LED (RPS) (4) Port LED
(5) Power LED (Power) (6) Port mode LED
(7) Console port (8) 1000Base-X SFP port
Figure 28 Rear panel
(1) DC receptacle (2) Screw hole of the plug
(3) AC-input power receptacle (4) Grounding screw
12
Preparing for installation
Safety recommendations
To avoid any equipment damage or bodily injury caused by improper use, read the following safety
recommendations before installation. Note that the recommendations do not cover every possible
hazardous condition.
• Before cleaning the switch, unplug all power cords. Do not clean the switch with wet cloth or liquid.
• Do not place the switch near water or in a damp environment. Prevent water or moisture from
entering the switch chassis.
• Do not place the switch on an unstable case or desk. The switch might be severely damaged in case
of a fall.
• Ensure proper ventilation of the equipment room and keep the air inlet and outlet vents of the switch
free of obstruction.
• Make sure that the operating voltage is in the required range.
• To avoid electrical shocks, do not open the chassis while the switch is operating or when the switch
is just powered off.
• When replacing FRUs, wear an ESD-preventive wrist strap to avoid damaging the units.
Examining the installation site
The 5120 EI and 5120 SI switches must be used indoors. You can mount your switch in a rack or on a
workbench, but make sure:
• Adequate clearance is reserved at the air inlet and exhaust vents for ventilation.
• The rack or workbench has a good ventilation system.
• The rack is sturdy enough to support the switch and its accessories.
• The rack or workbench is well earthed.
To ensure normal operation and long service life of your switch, install it in an environment that meets the
requirements described in the following subsections.
Temperature/humidity
Maintain appropriate temperature and humidity in the equipment room.
• Lasting high relative humidity can cause poor insulation, electricity creepage, mechanical property
change of materials, and metal corrosion.
• Lasting low relative humidity can cause washer contraction and ESD and bring problems including
loose captive screws and circuit failure.
• High temperature can accelerate the aging of insulation materials and significantly lower the
reliability and lifespan of the switch.
For the temperature and humidity requirements, see “Appendix A Technical specifications.”
13
g
Cleanness
Dust buildup on the chassis may result in electrostatic adsorption, which causes poor contact of metal
components and contact points, especially when indoor relative humidity is low. In the worst case,
electrostatic adsorption can cause communication failure.
Table 4 Dust concentration limit in the equipment room
Substance Concentration limit (particles/m³)
EMI
Dust
NOTE:
Dust diameter ≥ 5 μm
≤ 3 x 104 (no visible dust on the tabletop over three days)
The equipment room must also meet strict limits on salts, acids, and sulfides to eliminate corrosion and
premature aging of components, as shown in Table 5.
Table 5 Harmful gas li
Gas Maximum concentration (mg/m
SO
2
H2S 0.006
NH3 0.05
Cl2 0.01
mits in the equipment room
0.2
3
)
All electromagnetic interference (EMI) sources, from outside or inside of the switch and application
system, adversely affect the switch in a conduction pattern of capacitance coupling, inductance coupling,
electromagnetic wave radiation, or common impedance (including the grounding system) coupling. To
prevent EMI, take the following actions:
• If AC power is used, use a single-phase three-wire power receptacle with protection earth (PE) to
filter interference from the power grid.
• Keep the switch far away from radio transmitting stations, radar stations, and high-frequency
devices.
• Use electromagnetic shielding, for example, shielded interface cables, when necessary.
• Route interface cables only indoors to prevent signal ports from getting damaged by overvoltage or
overcurrent caused by lightning strikes.
Laser safety
The HP 5120 EI and 5120 SI switches are Class 1 laser devices.
WARNING!
Do not stare into any fiber port when the switch has power. The laser li
may hurt your eyes.
ht emitted from the optical fiber
14
Installation tools
• Flathead screwdriver
• Phillips screwdriver
• Needle-nose pliers
• Wire-stripping pliers
• Diagonal pliers
• ESD-preventive wrist strap
• Blow dryer
All these installation tools are user supplied.
15
g
Installing the switch
CAUTION:
Keep the tamper-proof seal on a mountin
chassis, contact your local HP agent for permission. Otherwise, HP
caused thereby.
Figure 29 Hardware installation flow
screw on the chassis cover intact, and if you want to open the
shall not be liable for any consequence
16
Installing a 5120 EI switch in a 19-inch rack
You can install a 5120 EI switch in a 19-inch standard rack by using different mounting positions. Table
6 shows the installation methods available for the switches of different depths.
Table 6 Installation methods
Use front
Chassis Depth
mounting
brackets
only
5120-24G EI (2 slots)
5120-24G EI TAA (2 slots)
5120-48G EI (2 slots)
5120-48G EI TAA (2 slots)
5120-24G EI
5120-48G EI
5120-24G-PoE+ EI (2 slots)
5120-24G-PoE+ EI TAA (2 slots)
5120-48G-PoE+ EI (2 slots)
5120-48G-PoE+ EI TAA (2 slots)
300 mm
(11.81 in)
420 mm
(16.54 in)
Yes (see
“Rack-mounti
ng by using
only front
mounting
brac
kets”
No
Use front mounting
brackets and a rack
shelf
Yes (see
“Rack-mounting by
using front mounting
brackets and a rack
shelf”)
Yes (see
“Rack-mounting by
using front
brackets and a rack
shelf”)
mounting
Use front and
rear mounting
brackets
No
Yes (see
“Rack-mounting
by using front
and rear
mounting
brac
NOTE:
For a switch with a 420 mm (16.54 in) of depth, the front mounting brackets are not weight-bearing.
kets”)
Mounting brackets
Figure 30 Front mounting bracket
1
(1) Hole for attaching to a rack (by using an M6 screw)
(2) Hole for attaching to the switch chassis
2
17
NOTE:
Figure 31 Rear mounting bracket
(1) Hole for attaching to a rack (by using an M6 screw)
The M6 screws for fixing the brackets to a rack are user supplied.
Table 7 shows the mounting bracket shipment for different switch models.
Table 7 Mounting bracket kit shipped with the 5120 EI switches
Chassis Front mounting brackets Rear mounting brackets
5120-24G EI (2 slots)
5120-24G EI TAA (2 slots)
5120-48G EI (2 slots)
5120-48G EI TAA (2 slots)
5120-24G EI
5120-48G EI
5120-24G-PoE+ EI (2 slots)
5120-24G-PoE+ EI TAA (2 slots)
5120-48G-PoE+ EI (2 slots)
5120-48G-PoE+ EI TAA (2 slots)
One pair N/A
One pair One pair
Rack-mounting by using only front mounting brackets
This installation method is available only for the 5120-24G EI (2 slots), 5120-24G EI TAA (2 slots),
5120-48G EI (2 slots), 5120-48G EI TAA (2 slots), 5120-24G EI, and 5120-48G EI switches.
This task requires two persons.
To mount a switch in a 19-inch standard rack by using only the front mounting brackets:
1. Wear an ESD-preventive wrist strap and make sure it makes good skin contact and is well
grounded.
2. Check that the rack is well grounded and can support the weight of the switch chassis and all its
accessories.
18
3. Unpack the front mounting brackets and the screws for fixing the brackets to the switch chassis.
4. Align the round holes in one bracket with the holes in the front mounting position of the switch
chassis, and use the screws to fix the mounting bracket to the chassis, as shown in Figure 32.
5. Repeat the previous step to attach the other mounting bracket to the chassis.
Figure 32 Attach the front mounting brackets to the chassis
1
2
3
(1) Front panel of the switch (2) Front mounting bracket
(3) Screw
6. Install cage nuts (user-supplied) in the mounting holes in the rack posts.
7. One person holds the switch chassis and aligns the oval holes in the brackets with the mounting
holes in the rack posts, and the other person fixes the mounting brackets with M6 screws
(user-supplied) to the rack, as shown in Figure 33.
19
Figure 33 Attach the front mounting brackets to the rack
1
1
2
4
3
(1) Front square-holed post (2) Front panel
(3) Screw for fixing the bracket to the square-holed post (4) Front mounting bracket
Rack-mounting by using front mounting brackets and a rack shelf
This installation method is available for all 5120 EI switches.
To mount a switch in a 19-inch rack by using the front mounting brackets and a rack shelf:
1. Wear an ESD-preventive wrist strap and make sure it makes good skin contact and is well
grounded.
2. Check that the rack is well grounded and can support the weight of the switch chassis and all its
accessories.
3. Fix the rack shelf horizontally in a proper position in the rack.
4. Unpack the front mounting brackets and the screws for fixing the brackets to the switch chassis.
5. Align the round holes in one bracket with the holes in the front mounting position of the switch
chassis, and use the removed screws to fix the mounting bracket to the chassis, as shown in Figure
32.
6. Repeat the previous step to attach the other mounting bracket to the chassis.
7. Install cage nuts (user-supplied) in the mounting holes in the rack posts.
8. Place the switch on the rack shelf, push it into the rack until the brackets touch the rack posts, and
fix the mounting brackets with M6 screws (user-supplied) to the rack, as shown in Figure 33.
20
Rack-mounting by using front and rear mounting brackets
This installation method is available only for the 5120-24G-PoE+ EI (2 slots), 5120-24G-PoE+ EI TAA (2
slots), 5120-48G-PoE+ EI (2 slots), and 5120-48G-PoE+ EI TAA (2 slots) switches.
This task requires two persons. To install the switch in a 19-inch rack by using the front and rear mounting
brackets:
1. Wear an ESD-preventive wrist strap and make sure it makes good skin contact and is well
grounded.
2. Unpack the front mounting brackets and the screws for fixing the brackets to the switch chassis.
3. Align the round holes in one front mounting bracket with the holes in the front mounting position of
the switch chassis, and use the removed screws to fix the mounting bracket to the chassis, as shown
in Figure 32.
4. Repeat the previous step to attach the other front mounting bracket to the chassis.
5. Unpack the rear mounting brackets and the load-bearing screws.
6. Fix the load-bearing screws in one of the rear mounting positions (see callout 2 in Figure 34) as
needed.
Figure 34 Attach the
(1) Load-bearing screw (2) Rear mounting positions
(3) Front panel (4) Front mounting bracket
(5) Screw for fixing the front mounting bracket to the switch
front mounting brackets and load-bearing screws to the chassis
NOTE:
The rear mounting brackets must closely contact with the load-bearing screws to support the chassis
weight.
7. Install cage nuts (user-supplied) in the mounting holes in the front and rear rack posts.
8. Fix the rear mounting brackets to the rear posts with M6 screws (user supplied), as shown in Figure
35.
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Figure 35 Attach the rear mounting brackets to a rack
1
1
2
(1) Rear square-holed post (2) Rear mounting bracket
9. One person supports the chassis bottom with one hand, holds the front part of the chassis with the
other hand, and pushes the chassis into the rack gently.
Make sure that the load-bearing screws closely contact with the upper edges of the rear mounting
brackets, as shown in Figure 36.
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