HP A5120 SI operation manual

HP A5120 EI & A5120 SI Switch Series

Part number: 5998-1773

Document version: 6W100-20110730

Installation Guide

Abstract

This document guides you through installation of HP A Series products, including installing the device,
connecting to the network, hardware management, and troubleshooting.

Legal and notice information

© Copyright 2011 Hewlett-Packard Development Company, L.P.

No part of this documentation may be reproduced or transmitted in any form or by any means without
prior written consent of Hewlett-Packard Development Company, L.P.

The information contained herein is subject to change without notice.

HEWLETT-PACKARD COMPANY MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS
MATERIAL, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE. Hewlett-Packard shall not be liable for errors contained
herein or for incidental or consequential damages in connection with the furnishing, performance, or use
of this material.

The only warranties for HP products and services are set forth in the express warranty statements
accompanying such products and services. Nothing herein should be construed as constituting an
additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

Contents

Preparing for installation ················································································································································· 1

Safety recommendations ·················································································································································· 2

Installation site requirements ··································································································································· 2
Rack-mounting requirements···································································································································· 3

Installation tools ································································································································································· 3

Installing the switch ·························································································································································· 4

Rack-mounting the A5120 EI switch in a 19-inch rack ································································································· 5

Mounting brackets ···················································································································································· 5
Rack-mounting using only front mounting brackets ······························································································· 7
Rack-mounting using front mounting brackets and a rack shelf ·········································································· 8
Rack-mounting by using front and rear mounting brackets ················································································· 8

Rack-mounting the A5120 SI switch in a 19-inch rack ······························································································ 13

Mounting brackets and mounting positions········································································································ 13
Attaching the mounting brackets to the switch chassis······················································································ 13

Rack-mounting procedure ····································································································································· 15
Mounting the switch on a workbench ·························································································································· 17
Grounding the switch ···················································································································································· 18

Grounding to a grounding strip··························································································································· 18

Grounding to a buried grounding conductor····································································································· 20

Grounding through the AC power cord ············································································································· 21
Connecting the power cord ·········································································································································· 22

Connecting the AC power cord ··························································································································· 22

Connecting the switch to a +12 VDC output RPS ······························································································ 23

Connecting the switch to a –52 to –55 VDC output RPS ·················································································· 24
Installing/removing an interface card (A5120 EI switches only) ············································································· 25

Installing an interface card ··································································································································· 25

Removing an interface card ································································································································· 26

Installing/removing a dedicated CX4/SFP+ cable ··························································································· 26
Verifying the installation ················································································································································ 27

Accessing the switch for the first time ·························································································································· 28

Setting up the configuration environment ···················································································································· 28
Connecting the console cable ······································································································································ 28

Console cable ························································································································································ 28

Connection procedure ·········································································································································· 29
Setting terminal parameters ·········································································································································· 29
Powering on the switch ················································································································································· 32

Verification before power-on ······························································································································· 32

Power-on sequence ··············································································································································· 32

Changing the startup mode·································································································································· 35

Setting up an IRF fabric ················································································································································· 37

IRF fabric setup flowchart ·············································································································································· 37
Planning IRF fabric setup ··············································································································································· 38

Planning IRF fabric size and the installation site ································································································ 38

Identifying the master switch and planning IRF member IDs ············································································ 38

Planning IRF topology and connections ·············································································································· 39

Identifying physical IRF ports on the member switches ····················································································· 40

Planning the cabling scheme ······························································································································· 41
Configuring basic IRF settings ······································································································································ 44

iii

Connecting the physical IRF ports ································································································································ 44
Accessing the IRF fabric to verify the configuration ··································································································· 44

Maintenance and troubleshooting ······························································································································· 46

Password loss ································································································································································· 46

Console login password loss ······························································································································· 46

Boot ROM password loss ····································································································································· 46
Power supply failure ······················································································································································ 46
Fan failure (A5120 EI switches only) ··························································································································· 48
Console terminal problems ··········································································································································· 48

Support and other resources ········································································································································ 49

Contacting HP ································································································································································ 49

Subscription service ·············································································································································· 49
Related information ························································································································································ 49

Documents ······························································································································································ 49

Websites ································································································································································ 49
Conventions ···································································································································································· 50

Appendix A Technical specifications··························································································································· 52

Panel views ····································································································································································· 52

A5120-24G EI (2 slots)/A5120-24G EI TAA (2 slots) ····················································································· 52

A5120-48G EI (2 slots)/A5120-48G EI TAA (2 slots) ····················································································· 53

A5120-24G EI ······················································································································································· 54

A5120-48G EI ······················································································································································· 55

A5120-24G-PoE+ EI (2 slots)/A5120-24G-PoE+ EI TAA (2 slots) ·································································· 56

A5120-48G-PoE+ EI (2 slots)/A5120-48G-PoE+ EI TAA (2 slots) ·································································· 57

A5120-16G SI ······················································································································································ 57

A5120-24G SI ······················································································································································ 58

A5120-48G SI ······················································································································································ 58

A5120-24G-PPoE+ SI ··········································································································································· 59

A5120-24G-PoE+ SI ············································································································································· 60
Technical specifications ················································································································································· 61

Chassis dimensions and weights ························································································································· 61

Ports and interface card slots ······························································································································· 61
Power specifications ······················································································································································ 62

Power input types ·················································································································································· 62

AC input voltage specifications ··························································································································· 62

RPS DC input voltage specifications and RPS compatibility ············································································· 62

Power consumption specifications for non-PoE switches ··················································································· 63

Power consumption specifications for PoE switches ·························································································· 63
Cooling system ······························································································································································· 64

Appendix B FRUs and compatibility matrixes············································································································· 65

Interface cards (A5120 EI switches only) ···················································································································· 65
SFP/SFP+/XFP transceiver modules and SFP+/CX4 cables (A5120 EI switches only) ········································· 65

GE SFP transceiver modules ································································································································· 66

10-GE SFP+ transceiver modules························································································································· 67

SFP+ cables ···························································································································································· 67

10-GE XFP transceiver modules ··························································································································· 68

CX4 cables ····························································································································································· 68
SFP transceiver modules and SFP Stacking Kit (only for the A5120 SI switches) ··················································· 69

Appendix C Ports and LEDs ·········································································································································· 71

Ports ················································································································································································· 71

Console port ·························································································································································· 71

10/100/1000 Base-T Ethernet port ··················································································································· 71

iv

SFP port ·································································································································································· 71

Combo interface (only available on the A5120 EI switches) ··········································································· 72
LEDs (for the A5120 EI switches) ································································································································· 72

System status LED ·················································································································································· 72

RPS status LED ························································································································································ 73

Port mode LED························································································································································ 73

Seven-segment LED ················································································································································ 74

10/100/1000 Base-T Ethernet port LED ··········································································································· 75

SFP port LED ··························································································································································· 76

Interface card status LED ······································································································································· 76
LEDs (for the A5120 SI switches) ································································································································· 76

Power LED ······························································································································································ 77

RPS status LED ························································································································································ 77

Port mode LED························································································································································ 77

10/100/1000 Base-T Ethernet port LED ··········································································································· 77

1000Base-X SFP port LED····································································································································· 79

Index ················································································································································································ 80

v

Type

Product
code

HP description

Alias

Non-PoE

JE066A

HP A5120-24G EI Switch

A5120-24G EI

JE067A

HP A5120-48G EI Switch

A5120-48G EI

JE068A

HP A5120-24G EI Switch with 2 Interface
Slots

A5120-24G EI (2 slots)

JG245A

HP A5120-24G EI TAA Switch with 2
Interface Slots

A5120-24G EI TAA (2 slots)

JE069A

HP A5120-48G EI Switch with 2 Interface
Slots

A5120-48G EI (2 slots)

JG246A

HP A5120-48G EI TAA Switch with 2
Interface Slots

A5120-48G EI TAA (2 slots)

PoE

JG236A

HP A5120-24G-PoE+ EI Switch with 2
Interface Slots

A5120-24G-PoE+ EI (2 slots)

JG247A

HP A5120-24G-PoE+ EI TAA Switch with
2 Interface Slots

A5120-24G-PoE+ EI TAA (2
slot)

JG237A

HP A5120-48G-PoE+ EI Switch with 2
Interface Slots

A5120-48G-PoE+ EI (2 slots)

JG248A

HP A5120-48G-PoE+ EI TAA Switch with
2 Interface Slots

A5120-48G-PoE+ EI TAA (2
slots)

Type

Product
code

HP description

Alias

Non-PoE

JE073A

A5120-16G SI

A5120-16G SI

JE074A

A5120-24G SI

A5120-24G SI

JE072A

A5120-48G SI

A5120-48G SI

PoE
JG092A

A5120-24G-PPoE+ SI

A5120-24G-PPoE+ SI

JG091A

A5120-24G-PoE+ SI

A5120-24G-PoE+ SI

Preparing for installation

The HP A5120 EI Switch Series includes the models in Table 1, and the HP A5120 SI Switch Series
includes the models in Table 2.

Table 1 Models in the HP A5120 EI Switch Series

Table 2 Models in the HP A5120 SI Switch Series

1

WARNING!

Read all of the safety instructions in the

Compliance and Safety Gui

de supplied with your device before

installation and operation.

Chassis

Operating temperature

Relative humidity

All chassis

0°C to 45°C (32°F to 113°F)

10% to 90%, noncondensing

Substance

Concentration limit (particles/m³)

Dust

≤ 3 x 104 (no visible dust on the tabletop over three days)

NOTE:

Dust diameter ≥ 5 μm

Safety recommendations

This section provides general recommendations. For more information, see the Compliance and Safety
Guide.

 Turn off all power and remove all power cables before opening the chassis.
 Unplug all power and external cables before moving the chassis.
 Locate the emergency power-off switch before installation and shut off power immediately if

necessary.

 Always wear an ESD-preventive wrist strap when installing the device.
 Do not stare into the open optical interface. The high-power density light can burn the retina.
 Use a good grounding system to protect your router against lightning shocks, interference, and ESD.

This is essential to the operating reliability of your switch.

 Make sure that the resistance between the chassis and the ground is less than 1 ohm.

Installation site requirements

The A5120 EI and A5120 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.

The following tables provide information about temperature, humidity, dust concentration limits, and air
quality requirements.

Table 3 Temperature and humidity requirements

Table 4 Dust concentration limit in the equipment room

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.

2

Gas

Maximum concentration (mg/m3)

SO2

0.2

H2S

0.006

NH3

0.05

Cl2

0.01

Table 5 Harmful gas limits in the equipment room

Rack-mounting requirements

Before rack-mounting a switch, make sure the rack meets the following requirements:

 HP recommends that you mount a switch in an open rack. If you mount a switch in a closed rack,

make sure there is a good heat dissipation system.

 The rack is steady enough to support the switch and accessories.
 The switch fits the rack size. Leave some space beside the left and right panels of the switch for

chassis heat dissipation.

Installation tools

The following installation tools are user-supplied.

 Flathead screwdriver
 Phillips screwdriver
 Needle-nose pliers
 Wire-stripping pliers
 Diagonal pliers
 ESD-preventive wrist strap
 Blow dryer (optional; for heating insulation for OT terminal joint when making a grounding wire)

3

CAUTION:

Keep the tamper-proof seal on a mounting screw on the chassis cover intact, and if you want to open
the chassis, contact your HP Support for permission. Otherwise, HP shall not be liable for any
consequence caused thereby.

Start

Install the switch to a 19-in

rack or workbench

Ground the switch

Connect the power

cord

Verify the installation

Power on the switch

Operating properly?

Power off the

switch

Troubleshoot

the switch

Install interface cards?

Yes

Yes

No

No

Install interface cards

Operating properly?

Yes

No

Troubleshoot

the switch

End

Connect transceiver

modules, connectors, and

cables

Installing the switch

Figure 1 Hardware installation flow

4

CAUTION:

Switches with 420 mm (16.54 in) depth require either a rack shelf or rear mounting brackets. Front
mounting brackets alone cannot support the weight of these switches.

Chassis

Depth

Use front
mounting
brackets
only

Use front mounting
brackets and a rack
shelf

Use front and
rear mounting
brackets

A5120-24G EI (2 slots)

A5120-24G EI TAA (2 slots)

A5120-48G EI (2 slots)

A5120-48G EI TAA (2 slots)

A5120-24G EI

A5120-48G EI

300 mm
(11.81
in)

Yes (see
"Rack-

mounting
using only
front
mounting
brackets"

Yes (see "Rack-

mounting using front
mounting brackets and
a rack shelf")

No

A5120-24G-PoE+ EI (2 slots)

A5120-24G-PoE+ EI TAA (2
slots)

A5120-48G-PoE+ EI (2 slots)

A5120-48G-PoE+ EI TAA (2
slots)

420 mm
(16.54
in)

No

Yes (see "Rack-

mounting using front
mounting brackets and
a rack shelf")

Yes (see "Rack-

mounting by
using front and
rear mounting
brackets")

NOTE:

The M6 screws for fastening the brackets to a rack are user-supplied.

Rack-mounting the A5120 EI switch in a 19-inch rack

Table 6 shows installation methods for mounting switches of different depths in a 19-inch standard rack.

The mounting position depends on the depth of the rack.

Table 6 Installation methods

Mounting brackets

5

1

2

(1) Hole for attaching to a rack (by using an M6 screw)

(2) Hole for attaching to the switch chassis

1

(1) Hole for attaching to a rack (by using an M6 screw)

Chassis

Front mounting brackets

Rear mounting brackets

A5120-24G EI (2 slots)

A5120-24G EI TAA (2 slots)

A5120-48G EI (2 slots)

A5120-48G EI TAA (2 slots)

A5120-24G EI

A5120-48G EI

One pair

N/A

Mounting bracket views

Figure 2 Front mounting bracket

Figure 3 Rear mounting bracket

Mounting brackets shipped with different switch models

Table 7 shows the mounting brackets included with different switch models.

Table 7 Mounting bracket kit shipped with the A5120 EI switches

6

Chassis

Front mounting brackets

Rear mounting brackets

A5120-24G-PoE+ EI (2 slots)

A5120-24G-PoE+ EI TAA (2 slots)

A5120-48G-PoE+ EI (2 slots)

A5120-48G-PoE+ EI TAA (2 slots)

One pair

One pair

3

2

1

(1) Front panel of the switch

(2) Front mounting bracket

(3) Screw

Rack-mounting using only front mounting brackets

Use this installation method only for A5120-24G EI (2 slots), A5120-24G EI TAA (2 slots), A5120-48G EI
(2 slots), A5120-48G EI TAA (2 slots), A5120-24G EI, and A5120-48G EI switches.

To mount a switch in a 19-inch standard rack using only front mounting brackets (requires two people):

1. Wear an ESD-preventive wrist strap and make sure it makes good skin contact and is properly

grounded.

2. Check that the rack is properly grounded and can support the weight of the switch chassis and all

its accessories.

3. Unpack the front mounting brackets and the screws for attaching 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 fasten the mounting brackets to the chassis, as shown in Figure 4.

Figure 4 Attach the front mounting brackets to the chassis

5. Install cage nuts (user-supplied) in the mounting holes in the rack posts.

6. This step requires two people. a. One person holds the switch chassis and aligns the oval holes in the brackets with the mounting

holes in the rack posts.

b. The other person fastens the mounting brackets to the rack with user-supplied M6 screws, as

shown in Figure 5.

7

2

1

1

3

4

(1) Front square-holed post

(2) Front panel

(3) Screw for fastening the bracket to the square-holed post

(4) Front mounting bracket

Figure 5 Attach the front mounting brackets to the rack

Rack-mounting using front mounting brackets and a rack shelf

This installation method can be used for all A5120 EI switches.

To mount a switch in a 19-inch rack 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 properly

grounded.

2. Check that the rack is properly grounded and can support the weight of the switch chassis and all

its accessories.

3. Install the rack shelf horizontally in an appropriate position in the rack.

4. Unpack the front mounting brackets and the screws for fastening 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 fasten the mounting bracket to the chassis, as shown in

Figure 4.

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

fasten the mounting brackets with M6 screws (user-supplied) to the rack, as shown in Figure 5.

Rack-mounting by using front and rear mounting brackets

This installation method is available only for the A5120-24G-PoE+ EI (2 slots), A5120-24G-PoE+ EI TAA (2
slots), A5120-48G-PoE+ EI (2 slots), and A5120-48G-PoE+ EI TAA (2 slots) switches.

8

1

2

3

4

5

(1) Load-bearing screw

(2) Rear mounting positions

(3) Front panel

(4) Front mounting bracket

(5) Screw for fastening the front mounting bracket to the switch

NOTE:

The rear mounting brackets must be in secure contact with the load-bearing screws to support the
chassis weight.

This task requires two people. 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 properly

grounded.

2. Unpack the front mounting brackets and the screws for fastening the brackets to the switch chassis.

3. Fasten the front mounting brackets to chassis by aligning the round holes in the brackets with the

holes in the front mounting position of the switch chassis, and fastening them with the removed
screws, as shown in Figure 4.

4. Unpack the rear mounting brackets and the load-bearing screws.

5. Fasten the load-bearing screws in one of the rear mounting positions (see callout 2 in Figure 6) as

needed.

Figure 6 Attach the front mounting brackets and load-bearing screws to the chassis

6. Install cage nuts (user-supplied) in the mounting holes in the front and rear rack posts.

7. Fasten the rear mounting brackets to the rear posts with M6 screws (user supplied), as shown in

Figure 7.

9

1

2

1

(1) Rear square-holed post

(2) Rear mounting bracket

Figure 7 Attach the rear mounting brackets to a rack

10

1

2

3

4

(1) Rear panel

(2) Rear square-holed post

(3) Load-bearing screw

(4) Rear mounting bracket

8. One person lifts the chassis, supporting it with one hand underneath and the other hand holding

the front.

a. Gently push the chassis into the rack so that the load-bearing screws fit snugly over the upper

edges of the rear mounting brackets.

b. Verify that the load-bearing screws fit snugly over the upper edges of the rear mounting

brackets, as shown in Figure 8.

c. Continue to support the chassis until its front brackets are securely fastened to the rack.

Figure 8 Mount the switch in the rack

9. The other person attaches the front brackets to the rack, as shown in Figure 9:

10. Verify that front and rear mounting brackets have been installed correctly and switch is securely

a. Align the oval holes in the front brackets with the mounting holes in the front rack posts.
b. Fasten the front mounting brackets to the front rack posts with user-supplied M6 screws.

mounted in the rack.

11

1 2

3

4
5

6

(1) Load-bearing screw

(2) Rear mounting bracket

(3) Front panel

(4) A screw used to fasten the front mounting bracket to the rack

(5) Front mounting bracket

(6) Front square-holed post

Figure 9 Attach the front brackets to the rack

12

Choose proper installation

positions for mounting brackets

Install the mounting

brackets to the left and

right sides of the switch

Mount the

switch to a rack

Chassis

Bracket view

Mounting position

 A5120-16G SI
 A5120-24G SI

See callout A in Figure 11.

 Front mounting (see Figure 12)
 Rear mounting (see Figure 13)

 A5120-24G-PoE+ SI
 A5120-24G-PPoE+ SI

See callout B in Figure 11.

 Front mounting (see Figure 14)
 Mid-mounting (see Figure 15)
 Rear mounting (see Figure 16)

A5120-48G SI

See callout B in Figure 11.

 Front mounting (see Figure 14)
 Rear mounting (see Figure 16)

1 2

1

2

(A) (B)

(1) Holes for attaching to a rack (by using M6 screws)

(2) Holes for attaching to the switch chassis

Rack-mounting the A5120 SI switch in a 19-inch rack

Figure 10 shows the general procedure for installing an A5120 SI switch in a 19-inch rack.

Figure 10 Install an A5120 SI switch in a 19-inch rack

Mounting brackets and mounting positions

Table 8 Mounting brackets for the A5120 SI switches

Figure 11 Mounting brackets

Attaching the mounting brackets to the switch chassis

To attach the mounting brackets to the switch chassis:

1. Identify the correct mounting position (see Table 8).

2. Align the round holes in one bracket with the holes in the mounting position.

3. Use screws to fasten the mounting bracket to the chassis.

13

1

(1) Front panel

1

(1) Front panel

1

(1) Front panel

1

(1) Front panel

4. Repeat the preceding steps to attach the other mounting bracket to the chassis.

Figure 12 Front mounting position (A5120-16G SI/A5120-24G SI)

Figure 13 Rear mounting position (A5120-16G SI/A5120-24G SI)

Figure 14 Front mounting position (A5120-24G-PoE+ SI/A5120-24G-PPoE+ SI/A5120-48G SI)

Figure 15 Mid-mounting position (A5120-24G-PoE+ SI/A5120-24G-PPoE+ SI)

14

1

(1) Front panel

NOTE:

If a rack shelf is available, you can put the switch on the rack shelf, slide the switch to an appropriate
location, and attach the switch to the rack with the mounting brackets.

Figure 16 Rear mounting position (A5120-24G-PoE+ SI/A5120-24G-PPoE+ SI/A5120-48G SI)

Rack-mounting procedure

This task requires two persons. To mount the switch in a rack:

1. Wear an ESD-preventive wrist strap and make sure it makes good skin contact and is properly

grounded.

2. Check that the rack is properly grounded and can support the weight of the switch chassis and all

its accessories.

3. Check that the mounting brackets have been securely attached to the switch chassis.

4. Install cage nuts (user-supplied) in the mounting holes in the rack posts.

5. 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 fastens the mounting brackets with M6 screws (user­supplied) to the rack, as shown in Figure 17 or Figure 18.

15

1

2

(1) Front panel

(2) Rear panel

1

Figure 17 Mount the switch in a rack (A5120-16G SI)

Figure 18 Mount the switch in a rack (A5120-24G-PoE+ SI/A5120-24G-PPoE+ SI)

16

1

2

(1) Front panel

(2) Rear panel

IMPORTANT:

Ensure good ventilation and 10 cm (3.9 in) of clearance around the chassis for heat dissipation.
Do not place heavy objects on the switch.

Mounting the switch on a workbench

This installation method is available for all A5120 EI and A5120 SI switches.

To mount the switch on a workbench:

1. Check that the workbench is sturdy and properly grounded.

2. Place the switch upside-down on the workbench.

3. Clean the round holes in the chassis bottom with dry cloth.

4. Attach the rubber feet to the four round holes in the chassis bottom.

5. Place the switch upright on the workbench.

17

WARNING!

Correctly connecting the switch grounding cable is crucial to lightning protection and EMI protection.

NOTE:

The power and grounding terminals shown in this section are for illustration only, and may be different
from the switch's actual power and grounding terminals.

WARNING!

Connect the grounding cable to the equipment room's grounding system. Do not connect it to a fire
main or lightning rod.

NOTE:

An OT terminal is supplied with the A5120 EI series A5120-24G-PoE+ SI and A5120-24G-PPoE+ SI
switches. For other models, the OT terminal is user-supplied.

Grounding the switch

The power input end of the switch has a noise filter, whose central ground is directly connected to the
chassis to form the chassis ground (commonly known as PGND). You must securely connect this chassis
ground to the earth so the faradism and leakage electricity can be safely released to the earth to
minimize EMI susceptibility of the switch.

You can ground the switch in one of the following ways, depending on the grounding conditions
available at the installation site:

 Grounding to a grounding strip
 Grounding to a buried grounding conductor
 Grounding through the AC power cord

HP recommends grounding the switch to a grounding strip in the equipment room, using the grounding
cable provided with the switch, whenever possible.

Grounding to a grounding strip

If a grounding strip is available at the installation site, connect the grounding cable to the grounding
strip.

To connect the grounding cable to the switch (the A5120-48G EI (2 slots) is shown as an example):

1. Identify the grounding point (with a grounding sign) on the rear panel of the switch chassis, and

remove the grounding screw from the grounding point.

2. Thread the grounding screw through the grounding cable's OT terminal, as shown in Figure 19.

3. Use a screwdriver to fasten the grounding screw into the grounding screw hole.

18

1

2

3

4

5

(1) Grounding sign

(2) Grounding hole

(3) OT terminal

(4) Grounding cable

(5) Grounding screw

(B)

(A)

Figure 19 Connecting the grounding cable to the grounding hole of the switch chassis

4. Remove the hex nut of a grounding post on the grounding strip.

5. Cut the grounding cable as appropriate for connecting to the grounding strip.

6. Make the connector for connecting to the grounding strip:

 If an OT terminal is available, peel 5 mm (0.20 in) of insulation sheath by using a wire stripper,

and insert the bare metal part through the black insulation covering into the end of the OT
terminal, secure the metal part of the cable to the OT terminal with a crimper, cover the joint with
the insulation covering, and heat the insulation covering with a blow dryer to completely cover
the metal part (see callout A in Figure 20).

 If no OT terminal is available, peel the insulation sheath as appropriate using a wire stripper,

and bend the bare metal part into a ring (see callout B in Figure 20). Attach the OT terminal or
the ring to the grounding strip through the grounding post, and fasten it with the removed hex nut,
as shown in Figure 21.

Figure 20 Making a grounding cable connector

19

(A)

(B)

1 2

3

4

3

4

(1) Grounding post

(2) Grounding strip

(3) Grounding cable

(4) Hex nut

1

2
3

4
5

6

(1) Grounding screw

(2) Grounding cable

(3) Earth

(4) Joint

(5) Grounding conductor

(6) Chassis rear panel

Figure 21 Connecting the grounding cable to a grounding strip

Grounding to a buried grounding conductor

If the installation site has no grounding strips, but earth ground is available, hammer a 0.5 m (1.64 ft) or
longer angle iron or steel tube into the earth ground to serve as a grounding conductor, as shown in

Figure 22.

The dimensions of the angle iron must be at least 50 × 50 × 5 mm (1.97 × 1.97 × 0.20 in). The steel
tube must be zinc-coated and its wall thickness must be at least 3.5 mm (0.14 in).

Weld the yellow-green grounding cable to the angel iron or steel tube, and treat the joint for corrosion
protection.

Figure 22 Ground the switch by burying the grounding conductor into the earth ground

20

NOTE:

If the ground contact in the power outlet is not properly grounded, report the problem and reconstruct
the grounding system.

1

2

(1) Three-wire AC power cable

(2) Chassis rear panel

Grounding through the AC power cord

If the installation site has no grounding strips or earth ground, you can ground an AC-powered switch
through the PE wire of the power cord, as shown in Figure 23.

You must make sure:

 The power cord has a PE terminal.
 The ground contact in the power outlet is securely connected to the ground in the power distribution

room or on the AC transformer side.

 The power cord is securely connected to the power outlet.

Figure 23 Grounding through the PE wire of the AC power cord

21

WARNING!

Make sure that the grounding cable has been properly connected before powering on the switch.

Chassis

Connection procedure

A5120-16G SI

A5120-24G SI

A5120-48G SI

A5120-24G-PPoE+ SI

Connecting the AC power cord

A5120-24G-PoE+ SI

AC-input:

Connecting the AC power cord

RPS input:

Connecting the switch to a –52 to –55 VDC output RPS

A5120-24G EI (2 slots)

A5120-24G EI TAA (2 slots)

A5120-48G EI (2 slots)

A5120-48G EI TAA (2 slots)

A5120-24G EI

A5120-48G EI

AC-input:

Connecting the AC power cord

RPS input:

Connecting the switch to a +12 VDC output RPS

A5120-24G-PoE+ EI (2 slots)

A5120-24G-PoE+ EI TAA (2 slots)

A5120-48G-PoE+ EI (2 slots)

A5120-48G-PoE+ EI TAA (2 slots)

AC-input:

Connecting the AC power cord

RPS input:

Connecting the switch to a –52 to –55 VDC output RPS

Connecting the power cord

Use Table 9 to identify the power cord connection procedures for your switch.

Table 9 Power cord connection methods at a glance

Connecting the AC power cord

To connect the AC power cord:

1. Wear an ESD-preventive wrist strap and make sure it makes good skin contact and is properly

grounded.

2. Connect one end of the AC power cord to the AC-input power receptacle on the switch. For

examples, see Figure 24 (A5120-48G EI) and Figure 25 (A5120-24G SI).

3. Connect the other end of the AC power cord to the AC power outlet.

22

Figure 24 Connect the AC power cord to the A5120-48G EI switch

Figure 25 Connect the AC power cord to the A5120-24G SI switch

Connecting the switch to a +12 VDC output RPS

This section applies to the A5120-24G EI (2 slots), A5120-24G EI TAA (2 slots), A5120-48G EI (2 slots),
A5120-48G EI TAA (2 slots), A5120-24G EI, and A5120-48G EI switches.

To connect these switches to the RPS that provides +12 VDC output:

1. Wear an ESD-preventive wrist strap and make sure it makes good skin contact and is properly

grounded.

2. To use the RPS receptacle, loosen the captive screws on the RPS receptacle protective cover and

remove the protective cover, as shown in Figure 26.

(If not using the RPS receptacle, leave the protective cover in place.)

Figure 26 Remove the RPS receptacle protective cover

3. The RPS cable provided with the switch has a directional plug that fits the switch's RPS receptacle.

Orient the plug to the RPS receptacle, and insert the plug as shown in Figure 27.

Do not use excessive force. The RPS receptacle is directional. If you cannot insert the plug, re-orient
the plug so it fits.

4. Tighten the screws on the plug with a flat-blade screwdriver.

5. Connect the other end of the power cord to the RPS.

23

1

2

1

2

2

1

2

2

Figure 27 Connect the RPS cable to the +12 VDC RPS receptacle

Connecting the switch to a –52 to –55 VDC output RPS

This section applies to the A5120-24G-PoE+ EI (2 slots), A5120-24G-PoE+ EI TAA (2 slots), A5120-48G­PoE+ EI (2 slots), A5120-48G-PoE+ EI TAA (2 slots) and A5120-24G-PoE+ SI switches.

To connect these switches to the RPS that provides –52 to –55 VDC output:

1. The RPS cable provided with the switch has a directional plug that fits the switch's RPS receptacle.

Orient the plug to the RPS receptacle, and insert the plug as shown in Figure 28.

Do not use excessive force. The RPS receptacle is directional. If you cannot insert the plug, re-orient
the plug so it fits.

2. Tighten the screws on the plug with a flat-blade screwdriver.

3. Connect the other end of the power cord to the RPS.

4. Verify that the RPS is supplying power and that the RPS status LED is ON.

Figure 28 Connect the RPS cable to the –52 to –55 RPS receptacle

24

IMPORTANT:

To set up an A5120 EI IRF fabric, you must install interface cards. To choose a correct slot for an
interface card, see “Planning the cabling scheme for an A5120 EI IRF fabric.”

Installing/removing an interface card (A5120 EI switches only)

This section applies to all A5120 EI switches except the A5120-24G EI and A5120-48G EI.

This section describes the procedures for installing and removing an interface card, using the LSPM2SP2P
interface card as an example.

For the interface cards available for the switches, see "Interface cards (A5120 EI switches only)."

When installing and removing interface cards:

 Do not use excessive force.
 Wear an ESD wrist strap.
 Do not touch surface-mounted components.

Installing an interface card

To install an interface card in an interface card slot at the rear of the chassis:

1. Wear an ESD-preventive wrist strap and make sure it makes good skin contact and is properly

grounded.

2. Use a Phillips screwdriver to release the mounting screws on the filler panel over the interface card

slot, and remove the filler panel.

Figure 29 Remove the filler panel over an interface card slot

3. Holding the captive screws on the front panel of the interface card, gently push the interface card

in along the slot guide rail until the interface card is firmly seated, as shown in Figure 30).

4. Tighten the captive screws with a Phillips screwdriver, without using excessive force. (The torque on

the captive screws must not exceed 0.4 N-m.)

25

2

2

1

CAUTION:

The cable bending radius must be at least eight times the cable diameter.

Figure 30 Install an interface card (II)

Removing an interface card

To remove an interface card:

1. Wear an ESD-preventive wrist strap and make sure it makes good skin contact and is properly

grounded.

2. Use a Phillips screwdriver to completely loosen the captive screws at both sides of the interface

card.

3. Pull the interface card out along the guide rails and remove it.

4. If no new card is to be installed, install the filler panel to prevent dust buildup and ensure good

ventilation inside the switch.

Installing/removing a dedicated CX4/SFP+ cable

The dedicated CX4 and SFP+ cables for the A5120 EI switches are hot swappable.

Installing a dedicated CX4/SFP+ cable

To connect a CX4 or SFP+ cable to a port on a CX4/SFP+ interface card:

1. Wear an ESD-preventive wrist strap and make sure it makes good skin contact is properly

grounded.

2. Correctly orient one connector of the cable with the port and insert the cable connector into the

port.

Removing a dedicated CX4/SFP+ cable

To remove a CX4 or SFP+ cable from a port on a CX4/SFP+ interface card:

1. Wear an ESD-preventive wrist strap and make sure it makes good skin contact and is properly

grounded.

26

2. Hold the cable connector and pull the pull latch of the connector to remove the cable from the

switch.

Verifying the installation

Before powering on the switch, verify that:

 There is enough space around the switch for heat dissipation.
 The switch is mounted securely on a sturdy workbench or rack.
 The switch is grounded properly, and the grounding cable is connected securely.
 The correct power source is used.
 The power cords are properly connected.
 All the interface cabling is indoors. If any cable is routed outdoors, verify that the socket strip with

lightning protection and lightning arresters for network ports is connected properly.

27

Main label

1

8

B side

B

Pos.9

Pos.1

A side

A

Accessing the switch for the first time

Setting up the configuration environment

To set up the configuration environment, connect a terminal (such as a PC) to the console port on the
switch with a console cable.

Figure 31 Connect the console port to a terminal

Connecting the console cable

Console cable

A console cable is an 8-core shielded cable, with a crimped RJ-45 connector at one end for connecting
to the console port of the switch, and a DB-9 female connector at the other end for connecting to the
serial port on the console terminal.

Figure 32 Console cable

28

CAUTION:

PC serial ports do not support hot-swapping. If the switch has been powered on, be sure to connect or
disconnect the cable as follows:

 Connecting: First connect the cable to the PC; then connect the cable to the switch.
 Disconnecting: First disconnect the cable from the switch; then disconnect the cable from the PC.

Connection procedure

To connect a PC or other terminal to the switch:

1. Plug the DB-9 female connector of the console cable to the serial port of the PC.

2. Connect the RJ-45 connector to the console port of the switch. Check for the mark on the console

port to make sure you are connecting to the correct port.

Setting terminal parameters

To configure and manage the switch, you must run a terminal emulator program on the console terminal.

The following are the required terminal settings:

 Bits per second—9,600
 Data bits—8
 Parity—None
 Stop bits—1
 Flow control—None
 Emulation—VT100

To set terminal parameters, for example, on a Windows XP HyperTerminal:

1. Select Start > All Programs > Accessories > Communications > HyperTerminal.

The Connection Description dialog box (Figure 33) appears.

2. Enter the name of the new connection in the Name field and click OK.

29

Figure 33 Connection description dialog box

3. Select the serial port to be used from the Connect using list (Figure 34), and click OK.

Figure 34 Setting the serial port

30

4. In the Properties dialog box (Figure 35), set Bits per second to 9600, Data bits to 8, Parity to

None, Stop bits to 1, and Flow control to None, and click OK.

Figure 35 Setting the serial port parameters

5. Select File > Properties in the HyperTerminal window (Figure 36).

Figure 36 HyperTerminal window

31

6. On the Settings tab (Figure 37), set the emulation to VT100 and click OK.

Figure 37 Setting terminal emulation

Powering on the switch

Verification before power-on

Before powering on the switch, verify that:

 The power cord is properly connected.
 The input power voltage meets the requirement of the switch.
 The console cable is connected correctly.
 The console terminal is powered on and configured correctly.

Power-on sequence

The A5120-24G-PoE+ EI TAA (2 slots) switch is used in the following example.

The power-on sequence is as follows:

1. Power on the switch. The console terminal screen displays the following information:

Starting......

********************************************************************************

* *

32

NOTE:

The system has two startup modes: full startup and fast startup. By default, the system starts up in fast
mode and the waiting time is one second. In full startup mode, the waiting time is five seconds. To
change the startup mode, see "Changing the startup mode."

Item

Description

1. Download application file to flash

Download a system software image file to the Flash memory.

2. Select application file to boot

Select the system software image file to boot.

* HP A5120-24G-PoE+ EI TAA Switch with 2 Interface Slots BOOTROM, Version 205 *

* *

********************************************************************************

Copyright (c) 2010-2011 Hewlett-Packard Development Company, L.P.

Creation date : Feb 23 2011, 09:36:58

CPU Clock Speed : 264MHz

BUS Clock Speed : 33MHz

Memory Size : 128MB

Mac Address : 3ce5a62f8dde

Press Ctrl-B to enter Boot Menu... 1

2. Press Ctrl + B at the prompt within one second to access the Boot menu, or wait for the system to

automatically start up.

3. If you press Ctrl + B within one second: a. the system displays a prompt for password:

Password:

b. Press Enter at the prompt the first time you access the switch and you can see the following Boot

menu:

BOOT MENU

1. Download application file to flash

2. Select application file to boot

3. Display all files in flash

4. Delete file from flash

5. Modify bootrom password

6. Enter bootrom upgrade menu

7. Skip current configuration file

8. Set bootrom password recovery

9. Set switch startup mode

0. Reboot

Enter your choice(0-9):

The options in the Boot menu are described in Table 10:

Table 10 Boot menu options

33

Item

Description

3. Display all files in flash

Display all files in the Flash memory.

4. Delete file from flash

Delete files from the Flash memory.

5. Modify bootrom password

Modify the Boot ROM password.

6. Enter bootrom upgrade menu

Access the Boot ROM update menu.

7. Skip current configuration file

Start the switch with the factory default configuration. This is a one­time operation and does not take effect at the next reboot. You use
this option when you forget the console login password.

8. Set bootrom password recovery

Disable or enable the Boot ROM password recovery function. By
default, Boot ROM recovery is enabled. You can disable this
function to protect system security.

9. Set switch startup mode

Set the startup mode to full mode or fast mode, as described in
"Changing the startup mode."

0. Reboot

Restart the switch.

NOTE:

The system by default has no Boot ROM password. HP recommends that you set a Boot ROM password
immediately after you access the Boot menu.

4. If you perform no operation or press any key other than Ctrl + B within one second: a. the system automatically starts up when the remaining time becomes zero, and displays the

following information:

Auto-booting...

Decompress Image................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

...........................................OK!

User interface aux0 is available.

Press ENTER to get started.

34

b. Press Enter at the prompt, and you can configure the switch when the prompt <HP> appears.

Changing the startup mode

The system by default starts up in fast mode.

To change to the full startup mode:

1. Press Ctrl + B within one second to access the Boot menu:

BOOT MENU

1. Download application file to flash

2. Select application file to boot

3. Display all files in flash

4. Delete file from flash

5. Modify bootrom password

6. Enter bootrom upgrade menu

7. Skip current configuration file

8. Set bootrom password recovery

9. Set switch startup mode

0. Reboot

Enter your choice(0-9):

2. Enter 9 to change the startup mode.

The current mode is fast startup mode!

Are you sure you want to change it to full startup mode? Yes or No(Y/N)

3. Enter Y at the prompt.

Setting startup mode...done!

BOOT MENU

1. Download application file to flash

2. Select application file to boot

3. Display all files in flash

4. Delete file from flash

5. Modify bootrom password

6. Enter bootrom upgrade menu

7. Skip current configuration file

8. Set bootrom password recovery

9. Set switch startup mode

0. Reboot

Enter your choice(0-9):

4. Enter 0 at the prompt. The system reboots in full startup mode and displays the following

information:

Starting......

********************************************************************************

* *

35

NOTE:

For more information about the configuration commands and CLI, see the configuration guides and
command references for your switch.

* HP A5120-24G-PoE+ EI TAA Switch with 2 Interface Slots BOOTROM, Version 205 *

* *

********************************************************************************

Copyright (c) 2010-2011 Hewlett-Packard Development Company, L.P.

Creation date : Feb 23 2011, 09:36:58

CPU Clock Speed : 264MHz

BUS Clock Speed : 33MHz

Memory Size : 128MB

Mac Address : 3ce5a62f8dde

Press Ctrl-B to enter Boot Menu... 5

5. In full startup mode, you must press Ctrl + B within five seconds to access the Boot menu. If you

perform no operation or press any key other than Ctrl + B within five seconds, the system
automatically starts up and displays the following information:

Auto-booting...

Decompress Image................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

................................................................................

..............OK!

Board checking.......................LSP1LTSUD

SDRAM fast selftest........................OK!

Flash fast selftest........................OK!

CPLD selftest..............................OK!

Switch chip selftest.......................OK!

PHY selftest...............................OK!

Please check leds....................FINISHED!

User interface aux0 is available.

Press ENTER to get started.

6. Press Enter at the prompt, and you can configure the switch when the prompt <HP> appears.

36

NOTE:

 IRF is not available on the A5120-24G EI or A5120-48G EI switch. The "A5120 EI switches" in this document

does not include those two switch models.

 An IRF fabric cannot have both A5120 EI and A5120 SI switches.

Connect grounding cables and

power cords

Install interface cards

(only on A5120 EI)

Configure basic IRF settings

Connect the physical IRF ports

Switches elected as slaves
reboot and the IRF fabric is

established automaticlly

End

Power on the switches

Plan IRF fabric setup

Install IRF member switches

Start

Setting up an IRF fabric

You can use HP Intelligent Resilient Framework (IRF) technology to connect and virtualize A5120 EI
switches or A5120 SI switches into a virtual switch called an "IRF fabric" or "IRF virtual device," for
flattened network topology and high availability, scalability, and manageability.

IRF fabric setup flowchart

Figure 38 IRF fabric setup flowchart

37

Task

Description

1. Plan IRF fabric setup

Plan the installation site and IRF fabric setup parameters:

 Planning IRF fabric size and the installation site
 Identifying the master switch and planning IRF member IDs
 Planning IRF topology and connections
 Identifying physical IRF ports on the member switches
 Planning the cabling scheme

2. Install IRF member

switches

See "Installing the switch.”

3. Connect the grounding

cable and power cords

See "Grounding the switch" and "Connecting the power cord."

4. Power on the switches

N/A

5. Install interface cards

This step is required only for the A5120 EI switches.

See "Installing/removing an interface card (A5120 EI switches only)."

6. Configure basic IRF

settings

See "Configuring basic IRF settings.”

7. Connect the physical IRF

ports

See "Connecting the physical IRF ports.”

All switches except the master switch automatically reboot, and the IRF
fabric is established.

NOTE:

IRF member switches automatically elect a master. You can affect the election result by assigning a high
member priority to the intended master switch. For more information about master election, see the IRF
configuration guide for your switch.

To set up an IRF fabric:

Planning IRF fabric setup

Planning IRF fabric size and the installation site

Choose switch models and identify the number of required IRF member switches, based on the user
density and upstream bandwidth requirements. The switching capacity of an IRF fabric equals the total
switching capacities of all member switches.

You can increase an IRF fabric's switching capacity by adding a switch without any topology change or
replacement.

Identifying the master switch and planning IRF member IDs

Complete the following planning tasks:

 Determine which switch you want to use as the master for managing all member switches in the IRF

fabric.

An IRF fabric has only one master switch. You use the command line interface of the master switch
to configure and manage all member switches in the IRF fabric.

38

IRF

fabric

Master

Slave

Slave

IRF

fabric

Slave

Slave

Master

 Prepare an IRF member ID assignment scheme. An IRF fabric uses member IDs to uniquely identify

and manage its members, and you must assign each IRF member switch a unique member ID.

Planning IRF topology and connections

IRF topology

You can create an IRF fabric in daisy chain topology, or more reliably, ring topology. In ring topology, the
failure of one IRF link does not cause the IRF fabric to split as in daisy chain topology. Rather, the IRF
fabric changes to a daisy chain topology without interrupting network services.

IRF port connections

You connect the IRF member switches through IRF ports. An IRF port is a logical interface for the internal
connection between IRF member switches. Each IRF member switch has two IRF ports: IRF-port 1 and IRF­port 2. To use an IRF port, you must bind physical ports to it.

When connecting two neighboring IRF member switches, you must connect the physical ports of IRF-port
1 on one switch to the physical ports of IRF-port 2 on the other switch.

You can bind several physical ports to an IRF port to create an aggregate IRF link for increased
bandwidth and availability.

The following figures show examples of IRF fabric topologies for the switch. The IRF port connections in these

figures are for illustration only, and more connection methods are available.

A5120 EI daisy chain and ring topology examples are shown in Figure 39 and Figure 40.

Figure 39 A5120 EI IRF fabric in daisy chain topology

Figure 40 A5120 EI IRF fabric in ring topology

39

IRF-port1

IRF-port2

IRF-port1

IRF-port2

1 2 3

1

2

3

IRF-port1

IRF-port2

IRF-port1

IRF-port1

IRF-port2

IRF-port2

1

2 3

1

2

3

A5120-24G SI IRF fabric daisy chain and ring topology examples are shown in 0 and Figure 42.

Figure 41 A5120 SI IRF fabric in daisy chain topology

Figure 42 A5120 SI IRF fabric in ring topology

Identifying physical IRF ports on the member switches

Follow your topology and connection scheme in identifying the physical IRF ports on the member
switches.

40

Switch chassis

Candidate physical
IRF ports

Requirements

A5120 EI switches
(excluding the A5120­24G EI and the A5120­48G EI)

Ports on the expansion
interface cards on the
rear panel

 You must order interface cards separately. For

long-distance connections, use XFP or SFP+
transceiver modules and fibers. For short­distance connections, use CX4 or SFP+ cables.
For more information, see "Interface cards

(A5120 EI switches only)" and "SFP/SFP+/XFP
transceiver modules and SFP+/CX4 cables
(A5120 EI switches only)."

 Ports assigned to the same IRF port must be on

the same interface card.

 All A5120 EI switches in a ring topology and the

non-edge switches in a daisy chain topology
must have at least one two-port interface card or
two one-port interface cards.

A5120 SI switches

All network ports

HP recommends that you use Gigabit SFP ports and
HP A3600 Switch SFP Stacking Kit cables for IRF
connection.

For more information, see "SFP transceiver modules

and SFP Stacking Kit (only for the A5120 SI
switches)."

Table 11 shows the physical ports that can be used for IRF connection, and the restrictions on port use.

Table 11 Physical IRF port requirements

Planning the cabling scheme

Planning the cabling scheme for an A5120 EI IRF fabric

If 2-port interface cards are used and the IRF links are not aggregate, follow these guidelines on

connecting two neighboring A5120 EI switches:

 You can connect the interface card in slot 1 (MOD 1) on a member switch to the MOD 1 or MOD 2

card on its neighboring switch.

 Connect the left port on one interface card to the right port on the other interface card, as shown in

Figure 43.

41

MOD1

MOD2 MOD2

MOD1

1 2

Figure 43 Use 2-port interface cards to set up single-link IRF connection

If 2-port interface cards are used and IRF links are aggregate, follow these guidelines on connecting two

neighboring switches:

 The ports on the interface card MOD 1 on one switch must connect to the ports on the interface

card MOD 2 on the other switch.

 A port on one interface card can connect to any port on the other interface card, as shown in Figure

44. For example, you can connect the left port on one interface card to the left or right port on the

other interface card.

Figure 44 Use 2-port interface cards to set up multi-link IRF connection

If 1-port interface cards are used, follow these guidelines on connecting neighboring switches:

 If both of the switches use 1-port interface cards, the port on MOD 1 on one switch must connect to

the port on MOD 2 on the other switch (see callout 1 in Figure 45).

 If one switch uses a 1-port interface card but the other switch uses a 2-port interface card:

 If the 1-port interface card is in the MOD 1 slot, the port on the card must connect to the right

port on the 2-port interface card (see callout 2 in Figure 45.)

 If the 1-port interface card is in the MOD 2 slot, the port on the card must connect to the left port

on the 2-port interface card.

42

MOD1 MOD2 MOD1 MOD2

1 2

1

2

3

4

1

2

3

4

Figure 45 Cable connections for an IRF fabric with 1-port interface cards

Planning the cabling scheme for an A5120 SI IRF fabric

HP recommends that you use Gigabit SFP ports and HP A3600 Switch SFP Stacking Kit cables for IRF
connection.

Figure 46 shows two IRF connection schemes, and uses Gigabit SFP ports and HP A3600 Switch SFP

Stacking Kit cables for IRF connection. These schemes use a ring topology.

Figure 46 Connect the IRF member switches

43

1 2

34

0 shows the IRF fabric topology.

Figure 47 IRF fabric topology

Configuring basic IRF settings

After installing the IRF member switches, power on the switches and log in to each IRF member switch to
configure their member IDs, member priorities, and IRF port bindings. For more information, see the
fundamentals configuration guide for your switch.

Follow these guidelines when you configure the neighboring switches:

 Assign the master switch higher member priority than any other switch.
 Bind physical ports to IRF port 1 on one switch and to IRF port 2 on the other switch.
 To activate the IRF port configuration, execute the irf-port-configuration active command.
 To verify the basic IRF settings, execute the display irf configuration command.

For more information about configuring basic IRF settings, see the IRF configuration guide for your switch.

Connecting the physical IRF ports

Follow your plan in connecting the IRF member switches. Wear an ESD-preventive wrist strap when you
connect the physical IRF ports. For more information about connecting physical IRF ports, see Pluggable
SFP/SFP+/XFP Transceiver Modules Installation Guide.

Accessing the IRF fabric to verify the configuration

To verify the basic functionality of the IRF fabric after you finish configuring basic IRF settings and
connecting IRF ports:

1. Log in to the IRF fabric through the console port of any member switch.

2. Create a Layer 3 interface, assign it an IP address, and make sure that the IRF fabric and the

remote network management station can reach each other.

3. Use Telnet, web or SNMP to access the IRF fabric from the network management station.

For more information, see the fundamentals configuration guide for your switch.

4. Verify that you can manage all member switches as if they were one node.

5. Display the running status of the IRF fabric by using the commands in Table 12.

44

To do …

Use the command…

Display information about the IRF fabric

display irf

Display all members’ configurations that take
effect after switch reboots

display irf configuration

Display topology information about the IRF
fabric

display irf topology

NOTE:

To avoid IP address collision and network problems, configure at least one MAD mechanism to detect
the presence of multiple identical IRF fabrics and handle collisions. For more information about MAD
detection, see the IRF configuration guide for your switch.

Table 12 Displaying and maintaining IRF configuration and running status

45

Maintenance and troubleshooting

Password loss

Console login password loss

To recover a lost console login password:

1. Access the Boot menu. The console terminal screen displays the following:

BOOT MENU

1. Download application file to flash

2. Select application file to boot

3. Display all files in flash

4. Delete file from flash

5. Modify bootrom password

6. Enter bootrom upgrade menu

7. Skip current configuration file

8. Set bootrom password recovery

9. Set switch startup mode

0. Reboot

Enter your choice(0-9):

2. Enter 7 and restart the switch. The switch reboots, bypassing the configuration.

3. Log in through the console port without entering the password, and check the configuration file for

the user password.

Boot ROM password loss

Contact the HP Support for help.

Power supply failure

The switch's power supplies are as follows:

 The A5120 EI switches and the A5120 SI switches use fastened power supplies.
 All A5120 EI switches and the A5120-24G-PoE+ SI switch support three power input modes:

 AC input

 RPS DC input

 Concurrent AC and RPS DC inputs

 All other A5120 SI switches use only one AC power input

To identify the cause of a power failure:

 On any A5120 EI switch, look at the system status LED and the RPS status LED of the switch. For more

information, see "LEDs (for the A5120 EI switches)."

46

NOTE:

In the following subsections, the system status LED refers collectively to both the system status LED on
an A5120 EI switch and the power LED on an A5120 SI switch.

 On the A5120-24G-PoE+ SI switch, look at the power LED and the RPS status LED of the switch. For

 On any other A5120 SI switch, look at the power LED of the switch. For more information, see "LEDs

AC input

If the system status LED is off, an AC input failure has occurred. Check the following:

 The AC power cord is securely connected to the switch, and the AC-input power receptacle on the

 The external AC power system is working correctly.
 The operating temperature of the switch is in the normal range, and the power module has good

RPS DC input

If the system status LED or RPS status LED is off, an RPS input failure has occurred. Check the following:

more information, see "LEDs (for the A5120 SI switches)."

(for the A5120 SI switches)."

switch and the connected AC power outlet are in good condition.

ventilation. Over-heating can cause the power module to stop working and enter the protection
state.

 The switch is securely connected to the RPS.
 The RPS is working correctly.
 The operating temperature of the switch is in the normal range, and the power supply has good

ventilation. Overheating can cause the power supply to stop working and enter the protection state).

Concurrent RPS and AC inputs

1. If the system status LED is off, the AC power supply and the RPS both have an input failure.

Check the following:

 The AC power cord is securely connected to the switch, and the AC-input power receptacle on

the switch and the connected AC power outlet are in good condition.

 The external AC power system is working correctly.

 The switch is securely connected to the RPS.

 The RPS is working correctly.

 The operating temperature of the switch is in the normal range, and the power supply has good

ventilation. Overheating can cause the power supply to stop working and enter the protection
state.

2. If the system status LED is on but the RPS status LED is steady yellow, an AC input failure has

occurred.

Check the following:

 The AC power cord is securely connected to the switch, and the AC-input power receptacle on

the switch and the connected AC power outlet are in good condition.

 The external AC power system is working correctly.

3. If the system status LED is on but the RPS status LED is off, an RPS input failure has occurred.

Check the following:

47

NOTE:

If the problem persists, contact HP Support for help.

LED

Mark

State

System status LED

PWR

Steady red

Seven-segment LED

Unit

The LED flashes F for fan failure.

 The switch is securely connected to the RPS.

 The RPS is working correctly.

Fan failure (A5120 EI switches only)

You can check the system status LED and the seven-segment LED of an A5120 EI switch to identify a fan
failure. If both LEDs are behaving as described in Table 13, a fan failure has occurred.

Table 13 LED behaviors that identify a fan failure

The A5120 EI switches use fans that are not user-replaceable. If a fan failure occurs, contact HP Support
for help and do not attempt to fix the problem yourself.

Console terminal problems

If the console terminal setup is correct, the console terminal displays boot information when the switch is
powered on. If the setup is incorrect, the console terminal displays nothing or garbled text.

No terminal display

If the console terminal displays nothing after the switch is powered on, check the following:

 The power supply is supplying power to the switch.
 The console cable is connected properly.
 The terminal settings are correct.
 The console cable is good.

Garbled terminal display

If terminal display is garbled, verify that the following settings are configured for the terminal, for
example, HyperTerminal:

 Baud rate—9,600
 Data bits—8
 Parity—none
 Stop bits—1
 Flow control—none
 Emulation—VT100

48

Support and other resources

Contacting HP

For worldwide technical support information, see the HP support website:

http://www.hp.com/support

Before contacting HP, collect the following information:

 Product model names and numbers
 Technical support registration number (if applicable)
 Product serial numbers
 Error messages
 Operating system type and revision level
 Detailed questions

Subscription service

HP recommends that you register your product at the Subscriber's Choice for Business website:

http://www.hp.com/go/wwalerts

After registering, you will receive email notification of product enhancements, new driver versions,
firmware updates, and other product resources.

Related information

Documents

To find related documents, browse to the Manuals page of the HP Business Support Center website:

http://www.hp.com/support/manuals

 For related documentation, navigate to the Networking section, and select a networking category.
 For a complete list of acronyms and their definitions, see HP A-Series Acronyms.

Websites

 HP.com http://www.hp.com
 HP Networking http://www.hp.com/go/networking
 HP manuals http://www.hp.com/support/manuals
 HP download drivers and software http://www.hp.com/support/downloads
 HP software depot http://www.software.hp.com

49

Convention

Description

Boldface

Bold text represents commands and keywords that you enter literally as shown.

Italic

Italic text represents arguments that you replace with actual values.

[ ]

Square brackets enclose syntax choices (keywords or arguments) that are optional.

{ x | y | ... }

Braces enclose a set of required syntax choices separated by vertical bars, from which
you select one.

[ x | y | ... ]

Square brackets enclose a set of optional syntax choices separated by vertical bars,
from which you select one or none.

{ x | y | ... } *

Asterisk-marked braces enclose a set of required syntax choices separated by vertical
bars, from which you select at least one.

[ x | y | ... ] *

Asterisk-marked square brackets enclose optional syntax choices separated by vertical
bars, from which you select one choice, multiple choices, or none.

&<1-n>

The argument or keyword and argument combination before the ampersand (&) sign
can be entered 1 to n times.

#

A line that starts with a pound (#) sign is comments.

Convention

Description

Boldface

Window names, button names, field names, and menu items are in bold text. For
example, the New User window appears; click OK.

>

Multi-level menus are separated by angle brackets. For example, File > Create >

Folder.

Convention

Description

WARNING

An alert that calls attention to important information that if not understood or followed
can result in personal injury.

CAUTION

An alert that calls attention to important information that if not understood or followed
can result in data loss, data corruption, or damage to hardware or software.

IMPORTANT

An alert that calls attention to essential information.

NOTE

An alert that contains additional or supplementary information.

TIP

An alert that provides helpful information.

Conventions

This section describes the conventions used in this documentation set.

Command conventions

GUI conventions

Symbols

50

Represents a generic network device, such as a router, switch, or firewall.

Represents a routing-capable device, such as a router or Layer 3 switch.

Represents a generic switch, such as a Layer 2 or Layer 3 switch, or a router that
supports Layer 2 forwarding and other Layer 2 features.

Network topology icons

Port numbering in examples

The port numbers in this document are for illustration only and might be unavailable on your device.

51

1 2 3 4 5 6 7

8
9

10
11

12

(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

1 2 3 4 5

(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)

Appendix A Technical specifications

Panel views

A5120-24G EI (2 slots)/A5120-24G EI TAA (2 slots)

The A5120-24G EI (2 slots) and A5120-24G EI TAA (2 slots) switches come with the expansion interface
card slots covered by filler panels.

Figure 48 Front panel

Figure 49 Rear panel

52

1 2 3 4 5

6
7
8
9

10

11

12

(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

1 2 3 4 5

(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)

A5120-48G EI (2 slots)/A5120-48G EI TAA (2 slots)

The A5120-48G EI (2 slots) and A5120-48G EI TAA (2 slots) switches come with the expansion interface
card slots covered by filler panels.

Figure 50 Front panel

Figure 51 Rear panel

53

CAUTION:

The A5120-24G EI switch does not support interface cards. To ensure good ventilation, do not remove
the interface card slot filler panels.

1 2 3 4 5 6 7

8
9

10

(1) 10/100/1000Base-T auto-sensing Ethernet
port

(2) 10/100/1000Base-T Ethernet port LED
(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

1 2 3 4 4

(1) AC-input power receptacle

(2) RPS receptacle

(3) Grounding screw

(4) "DO NOT REMOVE" label

A5120-24G EI

Figure 52 Front panel

Figure 53 Rear panel

54

CAUTION:

The A5120-48G EI switch does not support interface cards. To ensure good ventilation, do not remove
the interface card slot filler panels.

1 2 3 4 5

6
7

89

10

(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) Port LED mode switching button

(9) SFP port

(10) SFP port LED

1 2 3 4 4

(1) AC-input power receptacle

(2) RPS receptacle (with filler panel)

(3) Grounding screw

(4) "DO NOT REMOVE" label

A5120-48G EI

Figure 54 Front panel

Figure 55 Rear panel

55

1 2 3 4 5 6 7

8
9

10

11

12

(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

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)

A5120-24G-PoE+ EI (2 slots)/A5120-24G-PoE+ EI TAA (2 slots)

The A5120-24G-PoE+ EI (2 slots) and A5120-24G-PoE+ EI TAA (2 slots) switches come with the expansion
interface card slots covered by filler panels.

Figure 56 Front panel

Figure 57 Rear panel

56

1 2 3 4 5

6
7
8
9

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

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)

1 2 3 4 5

(1) 10/100/1000Base-T auto-sensing Ethernet port

(2) 1000Base-X SFP port

A5120-48G-PoE+ EI (2 slots)/A5120-48G-PoE+ EI TAA (2 slots)

The A5120-48G-PoE+ EI (2 slots) and A5120-48G-PoE+ EI TAA (2 slots) switches come with the
expansion interface card slots covered by filler panels.

Figure 58 Front panel

Figure 59 Rear panel

A5120-16G SI

Figure 60 Front panel

57

(3) Console port

(4) Port LED

(5) Power LED (Power)

1 2

(1) AC-input power receptacle

(2) Grounding screw

1 2 3 4 5

(1) 10/100/1000Base-T auto-sensing Ethernet port

(2) 1000Base-X SFP port

(3) Console port

(4) Port LED

(5) Power LED (Power)

1 2

(1) AC-input power receptacle

(2) Grounding screw

1 2 3

456

(1) 10/100/1000Base-T auto-sensing Ethernet port

(2) 10/100/1000Base-T Ethernet port LED

Figure 61 Rear panel

A5120-24G SI

Figure 62 Front panel

Figure 63 Rear panel

A5120-48G SI

Figure 64 Front panel

58

(3) Console port

(4) Power LED (Power)

(5) 1000Base-X SFP port

(6) 1000Base-X SFP port LED

1 2

(1) AC-input power receptacle

(2) Grounding screw

1 2 3

4567

(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

1 2

(1) AC-input power receptacle

(2) Grounding screw

Figure 65 Rear panel

A5120-24G-PPoE+ SI

Figure 66 Front panel

Figure 67 Rear panel

59

1 2 3 4

5678

(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

1 2 3 4

(1) DC receptacle

(2) Screw hole of the plug

(3) AC-input power receptacle

(4) Grounding screw

A5120-24G-PoE+ SI

Figure 68 Front panel

Figure 69 Rear panel

60

Chassis

Dimensions Dimensions
(H × W × D)

Weight

A5120-24G EI

A5120-24G EI (2 slots)

A5120-24G EI TAA (2 slots)

43.6 × 440 × 300 mm
(1.72 × 17.32 × 11.81 in)

< 4.5 kg (9.92 lb)

A5120-24G-PoE+ EI (2 slots)

A5120-24G-PoE+ EI TAA (2 slots)

43.6 × 440 × 420 mm
(1.72 × 17.32 × 16.54 in)

< 7.0 kg (15.43 lb)

A5120-48G EI

A5120-48G EI (2 slots)

A5120-48G EI TAA (2 slots)

43.6 × 440 × 300 mm
(1.72 × 17.32 × 11.81 in)

< 5 kg (11.02 lb)

A5120-48G-PoE+ EI (2 slots)

A5120-48G-PoE+ EI TAA (2 slots)

43.6 × 440 × 420 mm
(1.72 × 17.32 × 16.54 in)

< 7.5 kg (16.53 lb)

A5120-16G SI

A5120-24G SI

43.6 × 440 × 160 mm
(1.72 × 17.32 × 6.30 in)

≤ 3 kg (6.61 lb)

A5120-24G-PPoE+ SI

A5120-24G-PoE+ SI

43.6 × 440 × 420 mm
(1.72 × 17.32 × 16.54 in)

≤ 7 kg (15.43 lb)

A5120-48G SI

43.6 × 440 × 260 mm
(1.72 × 17.32 × 10.24 in)

≤ 5 kg (11.02 lb)

Chassis

Console
ports

10/100/1000Base-T
auto-sensing Ethernet
ports

1000Base-X
SFP ports

Interafce
card slots

A5120-24G EI

1

24 4 N/A

A5120-24G EI (2 slots)

A5120-24G EI TAA (2 slots)

1

24 4 2

A5120-24G-PoE+ EI (2 slots)

A5120-24G-PoE+ EI TAA (2 slots)

1

24, PoE+

4

2
A5120-48G EI

1

48 4 N/A

A5120-48G EI (2 slots)

A5120-48G EI TAA (2 slots)

1

48 4 2

A5120-48G-PoE+ EI (2 slots)

A5120-48G-PoE+ EI TAA (2 slots)

1

48, PoE+

4

2
A5120-16G SI

1

16 4 N/A

A5120-24G SI

1

24 4 N/A

Technical specifications

Chassis dimensions and weights

Ports and interface card slots

61

Chassis

Console
ports

10/100/1000Base-T
auto-sensing Ethernet
ports

1000Base-X
SFP ports

Interafce
card slots

A5120-24G-PoE+ SI

1

24, PoE+

4

N/A

A5120-24G-PPoE+ SI

1

24, PPoE+

4

N/A

A5120-48G SI

1

48 4 N/A

NOTE:

On an A5120 EI switch, the last four 10/100/1000Base-T Ethernet ports and the four SFP ports are
copper/fiber combo ports in pairs, as shown in Table 16. They form four combo interfaces. When one
port in a pair is activated, the other port automatically shuts down.

Chassis

AC-input power receptacle

RPS receptacle

All A5120 EI chassis,
A5120-24G-PoE+ SI

1

1

All A5120 SI chassis but
the A5120-24G-PoE+ SI

1

N/A

Chassis

Rated voltage range

Max voltage range

All chassis

100 VAC to 240 VAC, 50 Hz or 60
Hz

90 VAC to 264 VAC, 47 Hz to 63 Hz

Chassis

RPS input rated
voltage range

Compatible RPS

A5120-24G EI

A5120-24G EI (2 slots)

A5120-24G EI TAA (2 slots)

A5120-48G EI

A5120-48G EI (2 slots)

A5120-48G EI TAA (2 slots)

10.8 VDC to 13.2 VDC

A-RPS800 (JD183A)

Power specifications

Power input types

The RPS can supply power to your switch when the AC power line fails or cannot supply sufficient power.

AC input voltage specifications

RPS DC input voltage specifications and RPS compatibility

62

Chassis

RPS input rated
voltage range

Compatible RPS

A5120-24G-PoE+ EI (2 slots)

A5120-24G-PoE+ EI TAA (2 slots)

A5120-48G-PoE+ EI (2 slots)

A5120-48G-PoE+ EI TAA (2 slots)

–52 VDC to –55 VDC

A-RPS1600 (JG136A)

A5120-24G-PoE+ SI

–52 VDC to –55 VDC

A-RPS1600 (JG136A)

Chassis

Minimum power
consumption

Maximum power consumption

A5120-24G EI

35 W

62 W

A5120-24G EI (2 slots)

A5120-24G EI TAA (2 slots)

36 W

103 W
A5120-48G EI

54 W

110 W

A5120-48G EI (2 slots)

A5120-48G EI TAA (2 slots)

55 W

145 W
A5120-16G SI

11.9 W

25.1 W

A5120-24G SI

13.4 W

31.5 W

A5120-48G SI

25.7 W

59.8 W

Chassis

Maximum PoE
power per
port

Total PoE
output

Minimum
power
consumption

Maximum power
consumption (including
total PoE output)

A5120-24G-PoE+ EI
(2 slots)

A5120-24G-PoE+ EI
TAA (2 slots)

30 W

370 W

62 W

585 W at AC input

491 W at RPS DC input

A5120-48G-PoE+ EI
(2 slots)

A5120-48G-PoE+ EI
TAA (2 slots)

30 W

370 W at AC
input

740 W at RPS
DC input (370
W for ports 1 to
24, and 370 W
for ports 25 to

48)

90 W

651 W at AC input

921 W at RPS DC input

A5120-24G-PoE+ SI

30 W

370 W at AC
input

740 W at RPS
DC input

45.6 W at AC
input

27.5 W at RPS
DC input

528 W at AC input

832 W at RPS DC input

Power consumption specifications for non-PoE switches

Power consumption specifications for PoE switches

63

Chassis

Maximum PoE
power per
port

Total PoE
output

Minimum
power
consumption

Maximum power
consumption (including
total PoE output)

A5120-24G-PPoE+ SI

30 W

170 W

25.0 W

255 W

Chassis

Fixed fans

A5120-24G EI

A5120-24G EI (2 slots)

A5120-24G EI TAA (2 slots)

A5120-48G EI

A5120-48G EI (2 slots)

A5120-48G EI TAA (2 slots)

4

A5120-24G-PoE+ EI (2 slots)

A5120-24G-PoE+ EI TAA (2 slots)

A5120-48G-PoE+ EI (2 slots)

A5120-48G-PoE+ EI TAA (2 slots)

6

A5120-16G SI

A5120-24G SI

A5120-48G SI

1

A5120-24G-PPoE+ SI

3

A5120-24G-PoE+ SI

6

Cooling system

All A5120 EI and A5120 SI switches use fixed fans for heat dissipation. The airflow is from left to right.

64

Card
model

Product
code

Description

Support for IRF

Compatible transceiver
modules/cables

LSPM2GP2P

JD367A

Provides two Gbps
SFP fiber ports

No

See "GE SFP transceiver

modules."

NOTE:

The card does not support the
transceiver module coded
JD089B.

LSPM2SP2P

JD368B

Provides two 10
Gbps SFP+ fiber
ports

Yes

See "10-GE SFP+ transceiver

modules" and "SFP+ cables."

LSPM1XP2P

JD359B

Provides two 10
Gbps XFP fiber
ports

Yes

See "10-GE XFP transceiver

modules."

LSPM1XP1P

JD361B

Provides one 10
Gbps XFP fiber port

Yes

See "10-GE XFP transceiver

modules."

LSPM1CX2P

JD360B

Provides two 10
Gbps copper ports

Yes

See "CX4 cables."

NOTE:

For more information about the interface cards, see the user guides for the interface cards.

NOTE:

 To guarantee the functionality of the SFP/SFP+/XFP ports, use only HP transceiver modules.
 Transceiver modules availability for this switch series changes over time. For the most up-to-date list of

transceiver modules, consult your HP sales representative or technical support engineer.

 For the transceiver module specifications, see "

HP A-Series Switches Transceiver Modules User Guide

. "For

information about installing a transceiver module, see "

Pluggable SFP/SFP+/XFP Transceiver Modules

Installation Guide

."

Appendix B FRUs and compatibility matrixes

This appendix describes the FRUs available for the A5120 EI and A5120 SI switches, and their
compatibility.

Interface cards (A5120 EI switches only)

The interface cards in this section are available for all A5120 EI switches except the A5120-24G EI and
A5120-48G EI switches.

SFP/SFP+/XFP transceiver modules and SFP+/CX4 cables (A5120 EI switches only)

65

IMPORTANT:

You must use the transceiver modules coded JD098B and JD099B in pairs.

Product
code

Module description

Central
wavelength

(nm)

Cable/fiber
diameter
(µm)

Multimode
fiber modal
bandwidth
(MHz × km)

Max
transmission
distance

JD118B

HP X120 1G SFP LC SX
Transceiver

850

50/125
500

550 m
(1804.46 ft)

400

500 m
(1640.42 ft)

62.5/125

200

275 m
(902.23 ft)

160

220 m
(721.78 ft)

JD119B

HP X120 1G SFP LC LX
Transceiver

1310

9/125

N/A

10 km (6.21
miles)

50/125

500, 400

550 m
(1804.46 ft)

62.5/125

500

550 m
(1804.46 ft)

JD061A

HP X125 1G SFP LC
LH40 1310nm
Transceiver

1310

9/125

N/A

40 km (24.86
miles)

JD062A

HP X120 1G SFP LC
LH40 1550nm
Transceiver

1550

9/125

N/A

40 km (24.86
miles)

JD063B

HP X125 1G SFP LC
LH70 Transceiver

1550

9/125

N/A

70 km (43.50
miles)

JD103A

HP X120 1G SFP LC
LH100 Transceiver

1550

9/125

N/A

100 km
(62.14 miles)

JD098B

HP X120 1G SFP LC BX
10-U Transceiver

TX: 1310nm

RX: 1490nm

9/125

N/A

10 km (6.21
miles)

JD099B

HP X120 1G SFP LC BX
10-D Transceiver

TX: 1490nm

RX: 1310nm

9/125

N/A

10 km (6.21
miles)

JD089B

HP X120 1G SFP RJ45 T
Transceiver

N/A

Category-5
twisted pair

N/A

100 m
(328.08 ft)

GE SFP transceiver modules

66

NOTE:

For the SFP+ cables available for connecting the SFP+ ports, see "SFP+ cables."

Product code

Module
description

Central
wavelength

(nm)

Fiber
diameter
(µm)

Multimode fiber
modal
bandwidth
(MHz × km)

Max
transmission
distance

JD092B

HP X130 10G
SFP+ LC SR
Transceiver

850

50/125

2000

300 m (984.25
ft)

500

82 m (269.03
ft)

400

66 m (216.54
ft)

62.5/125
200

33 m (108.27
ft)

160

26 m (85.3 ft.)

JD093B

HP X130 10G
SFP+ LC LRM
Transceiver

1310
50/125

1500, 500

220 m (721.78
ft)

400

100 m (328.08
ft)

62.5/125

200, 160

220 m (721.78
ft)

JD094B

HP X130 10G
SFP+ LC LR
Transceiver

1310

9/125

N/A

10 km (6.21
miles)

JG234A

HP X130 10G
SFP+ LC ER
40km
Transceiver

1550

9/125

N/A

40 km (24.86
miles)

Product code

Cable description

Cable length

JD095B

HP X240 10G SFP+ SFP+ 0.65m DA Cable

0.65 m (2.13 ft)

JD096B

HP X240 10G SFP+ SFP+ 1.2m DA Cable

1.2 m (3.94 ft)

JD097B

HP X240 10G SFP+ SFP+ 3m DA Cable

3 m (9.84 ft)

JG081B

HP X240 10G SFP+ SFP+ 5m DA Cable

5 m (16.40 ft)

10-GE SFP+ transceiver modules

SFP+ cables

67

1

2

(1) Pull latch

(2) Connector

Product code

Module
description

Central
wavelength

(nm)

Fiber
diameter
(µm)

Multimode
fiber modal
bandwidth
(MHz × km)

Max transmission
distance

JD117B

HP X130 10G
XFP LC SR
Transceiver

850

50/125

2000

300 m (984.25 ft)

500

82 m(269.03 ft)

400

66 m(216.54 ft)

62.5/125
220

33 m (108.27 ft)

160

26 m (85.3 ft)

JD108B

HP X130 10G
XFP LC LR
Transceiver

1310

9/125

N/A

10 km (6.21 miles)

JD121A

HP X135 10G
XFP LC ER
Transceiver

1550

9/125

N/A

40 km (24.86 miles)

JD107A

HP X130 10G
XFP LC ZR
Transceiver

1550

9/125

N/A

80 km (49.71 miles)

Product code

Cable description

Connector type

Cable length

JD363B

HP X230 Local Connect 50cm
CX4 Cable

4X Infiniband

0.5 m (19.69 in)

JD364B

HP X230 Local Connect 100cm
CX4 Cable

4X Infiniband

1 m (39.37 in)

JD365A

HP X230 Local Connect CX4
300cm Cable

4X Infiniband

3 m (118.11 in)

Figure 70 SFP+ cable

10-GE XFP transceiver modules

CX4 cables

68

1

2

(1) Pull latch

(2) Connector

IMPORTANT:

You must use the transceiver modules coded JD098B and JD099B in pairs.

NOTE:

 To guarantee the functionality of the SFP ports, use only HP SFP transceiver modules.
 The SFP transceiver modules available for this switch series are subject to change over time. For the most up-to-

date list of SFP transceiver modules, consult your HP sales representative or technical support engineer.

 For the SFP transceiver module specifications, see "

HP A-Series Switches Transceiver Modules User Guide

."

Product
code

Module description

Central
wavelength

(nm)

Cable/fiber
diameter
(µm)

Multimode
fiber modal
bandwidth
(MHz × km)

Maximum
transmission
distance

JD118B

HP X120 1G SFP LC SX
Transceiver

850

50/125

500

550 m
(1804.46 ft)

400

500 m
(1640.42 ft)

62.5/125

200

275 m
(902.23 ft)

160

220 m
(721.78 ft)

JD119B

HP X120 1G SFP LC LX
Transceiver

1310

9/125

N/A

10 km (6.21
miles)

50/125

500, 400

550 m
(1804.46 ft)

62.5/125

500

550 m
(1804.46 ft)

JD061A

HP X125 1G SFP LC
LH40 1310nm
Transceiver

1310

9/125

N/A

40 km (24.86
miles)

Figure 71 CX4 cable

SFP transceiver modules and SFP Stacking Kit (only for the A5120 SI switches)

69

Product
code

Module description

Central
wavelength

(nm)

Cable/fiber
diameter
(µm)

Multimode
fiber modal
bandwidth
(MHz × km)

Maximum
transmission
distance

JD062A

HP X120 1G SFP LC
LH40 1550nm
Transceiver

1550

9/125

N/A

40 km (24.86
miles)

JD063B

HP X125 1G SFP LC
LH70 Transceiver

1550

9/125

N/A

70 km (43.50
miles)

JD098B

HP X120 1G SFP LC BX
10-U Transceiver

TX: 1310nm

RX: 1490nm

9/125

N/A

10 km (6.21
miles)

JD099B

HP X120 1G SFP LC BX
10-D Transceiver

TX: 1490nm

RX: 1310nm

9/125

N/A

10 km (6.21
miles)

JD089B

HP X120 1G SFP RJ45 T
Transceiver

N/A

Category-5
twisted pair

N/A

100 m
(328.08 ft)

JD324A

HP A3600 Switch SFP
Stacking Kit

N/A

UTP/STP

N/A

1.5 m (4.92 ft)

70

Item

Specification

Connector type

RJ-45

Compliant standard

EIA/TIA-232

Transmission baud rate

9600 bps (default) to 115200 bps

Service

 Provides connection to an ASCII terminal.
 Provides connection to the serial port of a local or remote

(through a pair of modems) PC running a terminal emulation
program.

Item

Specification

Connector type

RJ-45

Interface standard

 10 Mbps, half/full duplex
 100 Mbps, half/full duplex
 1000 Mbps, full duplex
 MDI/MDI-X, auto-sensing

Max transmission distance

100 m (328.08 ft)

Transmission medium

Category-5 (or above) twisted pair cable

Standards

IEEE 802.3i, 802.3u, 802.3ab

Appendix C Ports and LEDs

Ports

Console port

Every A5120 EI or A5120 SI switch provides one console port on the front panel.

Table 14 Console port specifications

10/100/1000 Base-T Ethernet port

Table 15 10/100/1000Base-T Ethernet port specifications

SFP port

All A5120 EI and A5120 SI switches have 1000Base-X SFP ports.

 For the SFP transceiver modules available for the A5120 EI switches, see "GE SFP transceiver

modules."

 For the SFP transceiver modules available for the A5120 SI switches, see "SFP transceiver modules

and SFP Stacking Kit (only for the A5120 SI switches)."

71

Chassis

SFP port

10/100/1000Base-T Ethernet
port

A5120-24G EI (2 slots)

A5120-24G EI TAA (2 slots)

A5120-24G-PoE+ EI (2 slots)

A5120-24G-PoE+ EI TAA (2 slots)

A5120-24G EI

GigabitEthernet 1/0/25

GigabitEthernet 1/0/22

GigabitEthernet 1/0/26

GigabitEthernet 1/0/24

GigabitEthernet 1/0/27

GigabitEthernet 1/0/21

GigabitEthernet 1/0/28

GigabitEthernet 1/0/23

A5120-48G EI (2 slots)

A5120-48G EI TAA (2 slots)

A5120-48G-PoE+ EI (2 slots)

A5120-48G-PoE+ EI TAA (2 slots)

A5120-48G EI

GigabitEthernet 1/0/49

GigabitEthernet 1/0/46

GigabitEthernet 1/0/50

GigabitEthernet 1/0/48

GigabitEthernet 1/0/51

GigabitEthernet 1/0/45

GigabitEthernet 1/0/52

GigabitEthernet 1/0/47

LED

Availability

System status LED

Entire series

RPS status LED

Entire series

Port mode LED

Entire series

Seven-segment LED

Entire series

10/100/1000 Base-T Ethernet port LED

Entire series

SFP port LED

Entire series

Interface card status LED

Entire series (except the A5120-24G EI and A5120-48G EI)

LED mark

Status

Description

PWR

Steady green

The switch is operating properly.

Combo interface (only available on the A5120 EI switches)

On an A5120 EI switch, the last four 10/100/1000Base-T Ethernet ports and the four SFP ports are
copper/fiber combo ports in pairs, as shown in Table 16. They form four combo interfaces. When one
port in a pair is activated, the other port automatically shuts down. For more information about combo
interfaces, see "HP A5120 EI Switch Series Configuration Guides."

Table 16 Copper/fiber combo ports in pairs

LEDs (for the A5120 EI switches)

Table 17 LEDs at a glance

System status LED

The system status LED shows the operating status of the switch.

Table 18 System status LED description

72

LED mark

Status

Description

Flashing green (1 Hz)

The switch is performing power-on
self test (POST).

Steady red

POST has failed.

Flashing yellow (1 Hz)

Some ports have failed to pass POST.

Off

The switch is powered off.

LED mark

Status

Description

RPS

Steady green

Both the RPS DC input and the AC input are normal, or an RPS is
connected and the AC input is normal.

Steady yellow

The RPS DC input is normal, but the AC input is disconnected or
has failed.

Off

No RPS is connected.

LED mark

Status

Description

RPS

Steady green

Both the RPS DC input and the AC input are normal.

Steady yellow

The RPS power input is normal, but the AC input is disconnected
or has failed.

Off

The RPS power input is abnormal or no RPS is connected.

LED mark

Status

Description

Mode

Steady green

The network port LEDs are showing port rates.

Flashing green (1 Hz) (available
only for the PoE switches)

The network port LEDs are showing the status of
PoE power supply on the ports.

Steady yellow

The network port LEDs are showing duplex
modes.

RPS status LED

The RPS status LED shows the operating status of the RPS DC input.

Table 19 RPS status LED description for the non-PoE switches

Table 20 RPS status LED description for the PoE switches

Port mode LED

The port mode LED indicates which type of information is being shown by the network port LEDs.

You can use the port LED mode switching button to change the type of port information that is displayed.

Table 21 Port mode LED description

73

System status LED
(PWR) status

Seven-segment LED (Unit) status

Description

Flashing green

The LED displays numbers one by one.
POST is running, and the LED

displays the ongoing test item ID.

Flashing red

The LED displays flashing numbers.
POST has failed, and the LED flashes

the ID of the failed test item.

Flashing green

A bar rotates clockwise around the LED.

Software is loading.

Steady red

The LED displays a flashing F character.
The switch is experiencing a fan
failure.

Steady red

The LED displays a flashing t character.
The switch is in an overheated

condition.

Steady green

The LED displays a capital C character.
The switch is the command switch in

a cluster.

The LED displays an S character.
The switch is a member switch in a

cluster.

The LED displays a lowercase c character.
The switch is a candidate switch for

a cluster.

The LED displays a number.

The member ID of the switch in an
IRF fabric.

The A5120-24G EI and A5120­48G EI switches do not support IRF.

Seven-segment LED

The seven-segment LED, together with the system status LED, shows detailed system operating information,
as described in Table 22.

The seven-segment LED can also show the total PoE output power as a percentage of the maximum PoE
output power that a PoE switch can supply (see Table 23). The PoE switches include:

 A5120-24G-PoE+ EI (2 slots)
 A5120-24G-PoE+ EI TAA (2 slots)
 A5120-48G-PoE+ EI (2 slots)
 A5120-48G-PoE+ EI TAA (2 slots)

Table 22 Seven-segment LED description (I)

74

Port mode LED
(Mode) status

System status LED
(PWR) status

Seven-segment
LED (Unit) status

Description

Flashing green (1
Hz) (PoE mode)

Steady green

The LED displays
different signs.

0 - 20%

21 - 40%

41 - 60%

61 - 80%

81 - 100%

For example, the sign indicates that
the switch is outputting 0 to 20% of the
maximum PoE output power.

Port mode LED (Mode)
status

Port LED status

Description

Steady green (rate mode)

Steady green

The port is operating at 1000 Mbps. The port LED
fast flashes when the port is sending or receiving
data.

Steady yellow

The port is operating at 10/100 Mbps. The port
LED fast flashes when the port is sending or
receiving data.

Flashing yellow (3 Hz)

POST has failed on the port.

Off

No link is present on the port.

Flashing green (1 Hz)
(PoE mode, available
only for PoE switches)

Steady green

PoE power supply is normal.

Flashing green (1 Hz)

The device attached to the port requires power
higher than the maximum or currently available
PoE output power on the port.

Steady yellow

The port is experiencing a PoE failure.

The port is not supplying power, because the
device attached to the port is not a powered
device.

Flashing yellow (3 Hz)

POST has failed on the port.

Off

The port is not supplying PoE power.

Steady yellow (duplex
mode)

Steady green

The port is operating in full duplex mode. The port
LED fast flashes when the port is sending or
receiving data.

Steady yellow

The port is operating in half duplex mode. The
port LED fast flashes when the port is sending or
receiving data.

Flashing yellow (3 Hz)

POST has failed on the port.

Off

No link is present on the port.

Table 23 Seven-segment LED description (II)

10/100/1000 Base-T Ethernet port LED

Each 10/100/1000Base-T auto-sensing Ethernet port has a status LED to show port operating status and
activities. The port mode LED indicates the type of information (for example, port rate or duplex mode)
that the port LEDs are showing. You can use the port LED mode switching button to change the type of
port information that is displayed.

Table 24 10/100/1000Base-T auto-sensing Ethernet port LEDs description

75

Port mode LED (Mode) status

Port LED status

Description

Steady green (rate mode) or
flashing green (1 Hz, PoE
mode)

Steady green

The port is operating at 1000 Mbps.
The port LED fast flashes when the
port is sending or receiving data.

Flashing yellow (3 Hz)

POST has failed on the port.

Off

No link is present on the port.

Steady yellow (duplex mode)

Steady green

The port is operating in full duplex
mode. The port LED fast flashes
when the port is sending or receiving
data.

Flashing yellow (3 Hz)

POST has failed on the port.

Off

No link is present on the port.

LED mark

Status

Description

MOD1

MOD2

Green

The interface card is in position and operating properly.

Flashing yellow

The switch does not support the interface card model, or the
interface card has failed.

Off

The expansion interface card slot is empty.

LED

Availability

Power LED

Entire series

RPS status LED

A5120-24G-PoE+ SI

Port mode LED

A5120-24G-PPoE+ SI, A5120-24G-PoE+ SI

10/100/1000 Base-T Ethernet port LED

Entire series

1000Base-X SFP port LED

Entire series

SFP port LED

Each 1000Base-X SFP port has a status LED to show port operating status and activities. The port mode
LED indicates the type of information (for example, port rate or duplex mode) that the port LEDs are
showing. You can use the port LED mode switching button to change the type of port information that is
displayed.

Table 25 SFP port LEDs description

Interface card status LED

Table 26 Interface card status LED description

LEDs (for the A5120 SI switches)

Table 27 LEDs at a glance

76

LED mark

Status

Description

Power

Steady green

The switch is operating properly.

Flashing green (1 Hz)

The system is performing power-on self test (POST) or
downloading software.

Flashing green (3 Hz)

POST has failed or another fatal error has been detected.

Off

The switch has been powered off.

LED mark

Status

Description

RPS
Steady green

The RPS DC input is normal.

Off

The RPS unit is not connected or the RPS DC input is abnormal.

LED mark

Status

Description

Mode
Steady green

The network port LEDs are showing port rates.

Flashing green (1 Hz)

The network port LEDs are showing the status of PoE power
supply on the ports.

Power LED

The power LED shows the operation status of the switch.

Table 28 Power LED description

RPS status LED

The A5120-24G-PoE+ SI switch has one RPS status LED on its front panel to show the operating status of
the RPS DC input.

Table 29 RPS status LED description

Port mode LED

The A5120-24G-PPoE+ SI and A5120-24G-PoE+ SI switches have a port mode LED to indicate the type of
information that the network port LEDs (excluding the SFP port LEDs) are showing. You can use the port
LED mode switching button to change the type of port information that is displayed.

Table 30 Port mode LED description

10/100/1000 Base-T Ethernet port LED

The A5120-48G SI switch has one bi-color LED (see Table 31) for each 10/100/1000Base-T Ethernet
port. All other A5120 SI switches have two LEDs (see Table 32) for each 10/100/1000Base-T Ethernet
port.

The A5120-24G-PPoE+ SI and A5120-24G-PoE+ SI switches also use a port mode LED to indicate the type
of information that the port LEDs are displaying (see Table 33).

77

Status

Description

Steady green

The port is operating at 1000 Mbps.

Fast flashing green

The port is sending or receiving data at 1000 Mbps.

Steady yellow

The port is operating at 10/100 Mbps.

Fast flashing yellow

The port is sending or receiving data at 10/100 Mbps.

Off

No link is present on the port.

LED

Status

Description

Green

On

The port is operating at 1000 Mbps.

Fast flashing

The port is sending or receiving data at 1000
Mbps.

Off

The port has no link or is not operating at 1000
Mbps.

Yellow

On

The port is operating at 10/100 Mbps.

Fast flashing

The port is sending or receiving data at 10/100
Mbps.

Off

The port has no link or is not operating at
10/100 Mbps.

Port mode LED
(Mode) status

Port LED

Port LED status

Description

Steady green (rate
mode)

Green

On

The port is operating at 1000 Mbps.

Fast flashing

The port is sending or receiving data at 1000
Mbps.

Off

The port has no link or is not operating at
1000 Mbps.

Yellow

On

The port is operating at 10/100 Mbps.

Fast flashing

The port is sending or receiving data at
10/100 Mbps.

Off

No link is present on the port.

Flashing green (PoE
mode)
Green

On

PoE power supply is normal.

Flashing at 3 Hz

The device attached to the port requires
power higher than the maximum or currently
available PoE output power on the port.

Off

The port is not supplying power.

Yellow
On Off

Table 31 Ethernet port LED description (A5120-48G SI)

Table 32 Ethernet port LEDs description (A5120-16G SI/A5120-24G SI)

Table 33 Ethernet port LED description (A5120-24G-PPoE+ SI/A5120-24G-PoE+ SI)

78

Status

Description

Steady green

The port is operating at 1000 Mbps.

Flashing green

The port is sending or receiving data.

Off

No link is present on the port.

1000Base-X SFP port LED

Table 34 1000Base-X SFP port LEDs description

79

Index

+12 VDC output RPS, 23

10/100/1000 Base-T Ethernet

port, 71

port LED (A5120 EI switches), 75

port LED (A5120 SI switches), 77

1000Base-X SFP

port LED (A5120 SI switches), 79

10 -GE SFP+ transceiver modules, 67

10 -GE XFP transceiver modules, 68

–52 to –55 VDC output RPS, 24

A5120 EI switch

19 -inch rack installation, 5

A5120 SI switch

19 -inch rack installation, 13

AC

power cord, 22

AC power cord, 22

accessing IRF fabric to verify the configuration, 44

accessing switch (first time), 28

attaching mounting bracket to A5120 SI switch

chassis, 13

bits per second (parameter), 29

boot ROM password loss, 46

cable

connecting console, 28, 29

grounding switch through AC power cord, 21

grounding switch to buried grounding conductor,

20

grounding switch to grounding strip, 18

planning IRF cabling scheme, 41

changing

startup mode, 35

chassis

attaching mounting bracket to A5120 SI switch

chassis, 13

combo interface

technical specifications, 72

component

A5120 EI switch mounting bracket, 5

A5120 SI switch mounting bracket, 13

connecting power cord, 22

rack mounting procedure (A5120 EI switch front

and rear mounting brackets), 8

rack mounting procedure (A5120 EI switch front

brackets only), 7

rack mounting procedure (A5120 EI switch rack

shelf), 8

rack mounting procedure (A5120 SI switch), 15

workbench mounting procedure (A5120 SI switch),

17

configuring

accessing IRF fabric to verify the configuration, 44

basic IRF settings, 44

switch, 28

connecting

+12 VDC output RPS, 23

–52 to –55 VDC output RPS, 24

AC power cord, 22

console cable, 28, 29

physical IRF ports, 44

planning IRF connections, 39

power cord, 22

console

connecting cable, 28, 29

port technical specifications, 71

80

console login password loss, 46

Interface cards (A5120 EI switches only), 65

contacting HP, 49

cooling system specifications (-PoE switches), 64

CX4 cables, 68

data bits (parameter), 29

DC (+12 VDC output RPS), 23

DC(–52 to –55 VDC output RPS), 24

dedicated CX4/SFP+ cable

installation/removal, 26

documentation

conventions used, 50

website, 49

dust, 2

electrical

connecting +12 VDC output RPS, 23

connecting –52 to –55 VDC output RPS, 24

connecting AC power cord, 22

connecting console cable, 28, 29

SFP transceiver modules and SFP Stacking Kit, 69

SFP/SFP+/XFP transceiver modules and SFP+/CX4

cables (A5120 EI switches only), 65

SFP+ cables, 67

GE SFP transceiver modules, 66

grounding

buried grounding conductor, 20

strip, 18

switch, 18

switch through AC power cord, 21

switch to buried grounding conductor, 20

switch to grounding strip, 18

through AC power cord, 21

hardware

10/100/1000 Base-T Ethernet port LED technical

specifications (A5120 EI switches), 75

10/100/1000 Base-T Ethernet port LED technical

specifications (A5120 SI switches), 77

connecting power cord, 22

grounding switch through AC power cord, 21

grounding switch to buried grounding conductor,

20

grounding switch to grounding strip, 18

grounding the switch, 18

powering on switch, 32

power-on sequence, 32

emulation (parameter), 29

fan

failure troubleshooting, 48

flow control (parameter), 29

FRUs and compatibility matrixes, 65

10 -GE SFP+ transceiver modules, 67

10 -GE XFP transceiver modules, 68

CX4 cables, 68

GE SFP transceiver modules, 66

10/100/1000 Base-T Ethernet port technical

specifications, 71

1000Base-X SFP port LED technical specifications

(A5120 SI switches), 79

A5120 EI switch 19-inch rack installation, 5

A5120 SI switch 19-inch rack installation, 13

AC input voltage specifications, 62

combo interface technical specifications, 72

connecting +12 VDC output RPS, 23

connecting –52 to –55 VDC output RPS, 24

connecting AC power cord, 22

connecting IRF physical ports, 44

console port technical specifications, 71

cooling system specifications (-PoE switches), 64

DC input voltage specifications, 62

dedicated CX4/SFP+ cable installation/removal,

26

grounding strip, 18 , 20, 21

81

grounding the switch, 18

interface card installation, 25

interface card installation (A5120 EI switches only),

25

workbench mounting procedure (A5120 SI switch),

17

HP

customer support and resources, 49

interface card removal, 26

interface card removal (A5120 EI switches only),

25

panel views, 52

Port mode LED (A5120 EI switches), 73

Port mode LED (A5120 SI switches), 77

port technical specifications, 61, 71

power consumption specifications (non-PoE

switches), 63

power consumption specifications (-PoE switches),

63

power input specifications, 62

power LED (A5120 SI switches), 77

rack mounting procedure (A5120 EI switch front

and rear mounting brackets), 8

rack mounting procedure (A5120 EI switch front

brackets only), 7

rack mounting procedure (A5120 EI switch rack

shelf), 8

rack mounting procedure (A5120 SI switch), 15

rack-mounting requirements, 3

RPS compatibility specifications, 62

RPS status LED (A5120 EI switches), 73

RPS status LED (A5120 SI switches), 77

seven-segment LED (A5120 EI switches), 74

SFP port LED technical specifications (A5120 EI

switches), 76

SFP port technical specifications, 71

slot technical specifications, 61

switch installation, 4

switch technical specifications, 61

system status LED (A5120 EI switches), 72

technical specifications, 52

verifying switch installation, 27

document conventions, 50

documents and manuals, 49

icons used, 50

subscription service, 49

support contact information, 49

symbols used, 50

websites, 49

icons, 50

identifying IRF master switch, 38

installation

preparing for, 1

tools, 3

installation tools, 3

installing

A5120 EI switch (19-inch rack), 5

A5120 SI switch (19-inch rack), 13

dedicated CX4/SFP+ cable, 26

installation site requirements, 2

interface card, 25

interface card (A5120 EI switches only), 25

rack-mounting installation requirements, 3

safety recommendations, 2

switch, 4

interface card

installation, 25

installation (A5120 EI switches only), 25

removal, 26

removal (A5120 EI switches only), 25

status LED technical specifications (A5120 EI

switches), 76

Interface cards (A5120 EI switches only), 65

IRF fabric

82

accessing IRF fabric to verify the configuration, 44

master switch (IRF), 38

basic settings configuration, 44

connecting physical ports, 44

displaying configuration, 44

displaying running status, 44

identifying master switch, 38

maintaining configuration, 44

maintaining running status, 44

planning cabling scheme, 41

planning connections, 39

planning fabric setup, 38

planning member IDs, 38

planning topology, 39

setting fabric, 37

LED

10/100/1000 Base-T Ethernet port (A5120 EI

switches), 75

member switch (IRF), 38

mode

startup (changing), 35

mounting bracket

A5120 EI switch, 5

A5120 SI switch, 13

network management (IRF fabric), 44

networking

connecting IRF physical ports, 44

grounding switch through AC power cord, 21

grounding switch to buried grounding conductor,

20

grounding switch to grounding strip, 18

planning IRF cabling scheme, 41

parity (parameter), 29

password

10/100/1000 Base-T Ethernet port (A5120 SI

switches), 77

1000Base-X SFP port (A5120 SI switches), 79

interface card status (A5120 EI switches), 76

Port mode (A5120 EI switches), 73

Port mode (A5120 SI switches), 77

power (A5120 SI switches), 77

RPS status (A5120 EI switches), 73

RPS status (A5120 SI switches), 77

seven-segment (A5120 EI switches), 74

SFP port (A5120 EI switches), 76

system status (A5120 EI switches), 72

technical specifications (A5120 EI switches), 72

technical specifications (A5120 SI switches), 76

maintenance and troubleshooting, 46

boot ROM password loss, 46

console login password loss, 46

password loss, 46

manuals, 49

boot ROM password loss, 46

console login password loss, 46

password loss, 46

planning

IRF cabling scheme, 41

IRF connections, 39

IRF fabric setup, 38

IRF member IDs, 38

IRF topology, 39

port

combo interface, 72

connecting IRF physical ports, 44

LED (SFP) (A5120 EI switches), 76

SFP, 71

technical specifications, 61, 71

Port mode LED (A5120 EI switches), 73

Port mode LED (A5120 SI switches), 77

power

83

AC input voltage, 62

DC input voltage specifications, 62

input specifications, 62

power consumption specifications (non-PoE

switches), 63

rack mounting (A5120 EI switch front brackets

only), 7

rack mounting (A5120 EI switch rack shelf), 8

rack mounting (A5120 SI switch), 15

removing interface card, 26

power consumption specifications (-PoE switches),

63

RPS compatibility specifications, 62

power cord, 22

power LED (A5120 SI switches), 77

power specifications, 62

power supply

failure troubleshooting, 46

powering on switch, 32

power-on sequence, 32

preparing for installation, 1

procedure

changing startup mode, 35

connecting +12 VDC output RPS, 23

connecting –52 to –55 VDC output RPS, 24

connecting AC power cord, 22

connecting console cable, 29

displaying IRF configuration, 44

displaying IRF running status, 44

grounding switch through AC power cord, 21

grounding switch to buried grounding conductor,

20

grounding switch to grounding strip, 18

installing interface card, 25

installing the switch, 4

installing/removing dedicated CX4/SFP+ cable,

26

workbench mounting (A5120 SI switch), 17

rack

attaching mounting bracket to A5120 SI switch

chassis, 13

installing A5120 EI switch (19-inch rack), 5

installing A5120 SI switch (19-inch rack), 13

mounting procedure (A5120 EI switch front and

rear mounting brackets), 8

mounting procedure (A5120 EI switch front brackets

only), 7

mounting procedure (A5120 EI switch rack shelf), 8

mounting procedure (A5120 SI switch), 15

verifying switch installation (19-inch rack), 27

removing

dedicated CX4/SFP+ cable, 26

interface card, 26

interface card (A5120 EI switches only), 25

requirements

installation site, 2

rack-mounting, 3

RPS

+12 VDC output RPS, 23

–52 to –55 VDC output RPS, 24

RPS status LED (A5120 EI switches), 73

RPS status LED (A5120 SI switches), 77

safety

recommendations, 2

maintaining IRF configuration, 44

maintaining IRF running status, 44

power-on sequence, 32

rack mounting (A5120 EI switch front and rear

mounting brackets), 8

setting

IRF fabric, 37

switch configuration environment, 28

terminal parameters, 29

84

seven-segment LED (A5120 EI switches), 74

SFP

port, 71

port LED (A5120 EI switches), 76

SFP transceiver modules and SFP Stacking Kit, 69

SFP/SFP+/XFP transceiver modules and SFP+/CX4

cables (A5120 EI switches only), 65

installing/removing dedicated CX4/SFP+ cable,

26

IRF basic settings configuration, 44

planning IRF cabling scheme, 41

planning IRF connections, 39

planning IRF fabric setup, 38

planning IRF member IDs, 38

SFP+ cables, 67

site requirements

dust, 2

gases, 2

humidity, 2

temperature, 2

slot

technical specifications, 61

specifications

technical, 52

startup

changing mode, 35

stop bits (parameter), 29

subscription service, 49

support and other resources, 49

switch

accessing (first time), 28

planning IRF topology, 39

powering on, 32

power-on sequence, 32

removing interface card, 26

removing interface card (A5120 EI switches only),

25

setting configuration environment, 28

setting IRF fabric, 37

setting terminal parameters, 29

verifying installation, 27

symbols, 50

system status LED (A5120 EI switches), 72

technical specifications

10/100/1000 Base-T Ethernet port, 71

10/100/1000 Base-T Ethernet port LED (A5120 EI

switches), 75

10/100/1000 Base-T Ethernet port LED (A5120 SI

switches), 77

attaching mounting bracket to A5120 SI switch

chassis, 13

connecting console cable, 28, 29

grounding, 18

grounding through AC power cord, 21

grounding to buried grounding conductor, 20

grounding to grounding strip, 18

identifying IRF master, 38

installation, 4

installing interface card, 25

installing interface card (A5120 EI switches only),

25

1000Base-X SFP port LED (A5120 SI switches), 79

AC input voltage, 62

combo interface, 72

console port, 71

cooling system specifications (-PoE switches), 64

DC input voltage, 62

interface card status LED (A5120 EI switches), 76

LED (A5120 EI switches), 72

LED (A5120 SI switches), 76

panel views, 52

port, 61, 71

85

Port mode LED (A5120 EI switches), 73

identifying IRF master switch, 38

Port mode LED (A5120 SI switches), 77

power, 62

power consumption specifications (non-PoE

switches), 63

power consumption specifications (-PoE switches),

63

power input, 62

power LED (A5120 SI switches), 77

RPS compatibility, 62

RPS status LED (A5120 EI switches), 73

RPS status LED (A5120 SI switches), 77

seven-segment LED (A5120 EI switches), 74

SFP port, 71

SFP port LED (A5120 EI switches), 76

slot, 61

switch (Appendix A), 61

system status LED (A5120 EI switches), 72

terminal

troubleshooting garbled display, 48

troubleshooting no display, 48

tool (installation needs), 3

topology

planning IRF, 39

planning IRF cabling scheme, 41

planning IRF connections, 39

planning IRF fabric setup, 38

planning IRF member IDs, 38

setting IRF fabric, 37

troubleshooting, 46

fan failure, 48

garbled console terminal display, 48

no console terminal display, 48

power supply failure, 46

verifying

accessing IRF fabric to verify configuration, 44

electrical before power-on, 32

switch installation, 27

virtual device. See IRF fabric

VT100, 29

websites, 49

workbench

mounting procedure (A5120 SI switch), 17

verifying switch installation, 27

86