HP 2920 Series Installation And Getting Started Manual Download Page 1

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Power over Ethernet

HP 2920 Switches

Installation and Getting Started Guide

Summary of Contents for 2920 Series

Page 1: ...Power over Ethernet HP 2920 Switches Installation and Getting Started Guide ...

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Page 3: ...HP 2920 Switches Installation and Getting Started Guide ...

Page 4: ...ing 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 Hewlett Packard assumes no responsibility for the use or reliability of its software on equipment that is not furnished by Hewlett Packard Warranty For HP warranty information visit http h17007 www1 hp com us...

Page 5: ... 6 LED Mode Select Button and Indicator LEDs 1 11 Reset and Clear Buttons 1 12 Backs of the Switches 1 13 Power Supplies 1 13 Power Connector 1 13 10G Expansion Module Slots 1 14 Stacking Module Slot 1 14 HP 2920 10G Expansion Modules 1 14 10G Expansion Module Features 1 15 10G Expansion Module LEDs 1 16 HP 2920 Stacking Module 1 17 Stacking Module Features 1 17 Stacking Module LEDs 1 17 Switch Fe...

Page 6: ... 2920 switch in a 4 post rack 2 14 Horizontal Surface Mounting 2 15 6 Optional Install Stacking Cables 2 16 7 Optional Install Transceivers 2 17 Installing a transceiver 2 17 Removing a transceiver 2 18 8 Connect the Switch to a Power Source 2 18 PoE PoE Operation 2 18 9 Connect the Network Devices 2 19 Using the RJ 45 Connectors 2 19 Connecting Cables to Transceivers 2 19 Connecting a fiber cable...

Page 7: ...a 10G Expansion Module 4 3 Replacing the Stacking Module 4 4 5 Troubleshooting Basic Troubleshooting Tips 5 2 Diagnosing with the LEDs 5 4 Proactive Networking 5 11 Hardware Diagnostic Tests 5 12 Testing the Switch by Resetting It 5 12 Checking the Switch LEDs 5 12 Checking Console Messages 5 12 Testing Twisted Pair Cabling 5 13 Testing Switch to Device Network Communications 5 13 Testing End to E...

Page 8: ... Cabling Specifications B 1 Technology Distance Specifications B 3 Mode Conditioning Patch Cord B 4 Installing the Patch Cord B 5 Twisted Pair Cable Connector Pin Outs B 6 Straight Through Twisted Pair Cable for 10 Mbps or 100 Mbps Network Connections B 7 Cable Diagram B 7 Pin Assignments B 7 Crossover Twisted Pair Cable for 10 Mbps or 100 Mbps Network Connection B 8 Cable Diagram B 8 Pin Assignme...

Page 9: ...nstalled in the switches any combination of up to four HP 2920 switches can be stacked together via high speed backplane cables to form a single extended virtual switch See Stacking Information and Topologies on page 2 25 and the Advanced Traffic Management Guide for more stacking information These switches are described in this manual This chapter describes these switches with the following infor...

Page 10: ...E Switch Power Fault and Locator LEDs PoE Tmp Temperature Test Fan and Aux Auxiliary port status LED LED Mode button and indicator LEDs Reset and Clear buttons Status LEDs for components on the back of the switch Aux port and Out of Band Management port Stacking status LEDs 10 100 1000BASE T PoE RJ 45 ports Switch port LEDs Dual Personality 10 100 1000BASE T or SFP ports Console ports ...

Page 11: ...er Fault and Locator LEDs Tmp Temperature Test Fan and Aux Auxiliary port status LED LED Mode button and indicator LEDs Reset and Clear buttons Status LEDs for components on the back of the switch Aux port and Out of Band Management port Stacking status LEDs 10 100 1000BASE T RJ 45 ports Switch port LEDs Dual Personality 10 100 1000BASE T or SFP ports Console ports ...

Page 12: ...100 1000 non PoE RJ 45 ports1 10 100 1000 PoE PoE RJ 45 ports1 1G SFP ports2 SFP ports3 10GBASE T RJ 45 ports1 HP 2920 24G PoE Switch 20 4 HP 2920 48G PoE Switch 44 4 HP 2920 24G Switch 20 4 HP 2920 48G Switch 44 4 HP 2920 2 port 10G SFP Module 2 HP 2920 2 port 10G BASE T Module 2 Notes 1 All RJ 45 ports support Auto MDIX which means you can use either straight through or crossover twisted pair ca...

Page 13: ...r single mode LC 10 Gbps 10 Gig Direct Attach Copper twinaxial Not Applicable 10 Gig SR Fiber multimode LC 10 Gig LRM Fiber multimode LC 10 Gig LR Fiber single mode LC 10 Gig ER Fiber single mode LC 1 For supported transceivers visit www hp com networking support In the first textbox type J4858 for 100 Mb and Gigabit information or J8436 for 10 Gigabit information Select any of the products that d...

Page 14: ...ot provided Use a USB 2 0 high speed cable with male type A 4 pin to male micro B 5 pin connectors The maximum allowable length is 5 meters Out of Band Management OOBM Port This RJ 45 port is used to connect a dedicated management network to the switch Auxiliary Aux Port An auxiliary port for processing a USB command file or downloading switch software code This port uses a USB 1 1 connector Switc...

Page 15: ...cled or reset The switch is not operational until this LED goes off The Self Test LED also comes on briefly when you hot swap a mini GBIC into the switch the mini GBIC is self tested when it is hot swapped Blink orange A component of the switch has failed its self test The status LED for that component for example the Fan LED and the switch Fault LED will blink simultaneously Port LEDs green orang...

Page 16: ...two LEDs are lit and so on and to indicate which switch is the Standby Cmd LED will blink Save Power This mode is indicated by ALL the mode indicator LEDs being Off This display occurs only if the switch has been configured with the savepower led command See the Management and Configuration Guide for more information on that command PS Power Supply Status green orange On Blink orange Off Normal op...

Page 17: ... command file or downloading switch software code The blinking behavior is an on off cycle once every 1 6 seconds approximately The fast blinking behavior is an on off cycle once every 0 5 seconds approximately If the Save Power LED feature is configured for the switch savepower led command then all LEDs except the Power LED may be off Applies only to HP 2920 switches that support PoE PoE Switch L...

Page 18: ... Stacking Module or a 10G Expansion Module has been installed while the switch was powered on hot swapped and the switch needs to be rebooted to support the module No modules are installed into the module slots in the back of the switch Stacking Status green orange Cmd on Cmd blink green Cmd off Stk on Stk blink green Stk blink orange Stk off This switch is a Commander of a stack This switch is be...

Page 19: ...s a combination of PoE PoE switches and non PoE switches in the stack when any of the Mode select buttons is pressed to put the stack into PoE mode the non PoE switches indicate no PoE support by not illuminating any of the Mode indicator LEDs or any of the port LEDs If any of the switches in the stack are configured with the Save Power LED feature then the default LED Mode for the whole stack bec...

Page 20: ... switch except If the Commander the Standby switch will become Commander If the Standby a new Standby will be elected Hard Reset Stacked switch Press and hold the Reset button for more than 5 seconds until all LEDs turn on then release Same as a standalone switch except If the Commander the Standby switch will become Commander If the Standby a new Standby will be elected Delete console and managem...

Page 21: ...ed such that it does not fit into the HP 2920 PoE switches HP X332 550W 100 240VAC to 54VDC PS J9738A a 575 watt power supply for the HP 2920 PoE switches The 575 watt power supply provides PoE PoE power The 575 watt power supply is keyed such that it does not fit into the non PoE switches Power Connector The HP 2920 switches do not have a power switch they are powered on when connected to an acti...

Page 22: ...canacceptthe HP2920 Stacking Module that provides high speed connectivity to other HP 2920 switches Only the HP 2920 switches support this module See HP 2920 Stacking Module on page 1 17 for more information HP 2920 10G Expansion Modules The HP 2920 10G Expansion Modules are components you can add to a HP 2920 Switch to provide a variety of network connectivity options The following modules are av...

Page 23: ...s two 10GBASE T RJ 45 ports or two SFP bays depending on the module installed LEDs that provide information on the module status and the link status and LED mode for each port hot swap transceiver support you can add replace or change the type of any of the transceivers that you use in the SFP module ports without having to first remove the module and without having to shut down the switch Standar...

Page 24: ... a switch that is powered off The module was installed while the switch was powered on The module was installed while the switch was powered on The switch must be rebooted to support the module LEDs per port Link green orange On Off Blinking orange The port is enabled and receiving a link indication from the connected switch The port has no active stacking cable connected is not receiving the link...

Page 25: ...ule Stacking Module Features The HP 2920 2 Port Stacking Module J9733A has the following features Two stacking connectors for connecting the HP 2920 switch to other HP 2920s in a stacked topology chain or ring Any of these available HP 2920 stacking cables can be used for these connections 0 5m Stacking Cable J9734A 1 0m Stacking Cable J9735A 3 0m Stacking Cable J9736A LEDs described in Table 1 6 ...

Page 26: ...as installed while the switch was powered on The module was installed while the switch was powered on The switch must be rebooted to support the module Stacking Module LEDs per port Link green orange On Off Blinking orange The port is enabled and receiving a link indication from the connected switch The port has no active stacking cable connected is not receiving the link indication or the port ma...

Page 27: ...oE PoE Planning and Implementation Guide which is on the HP Web site www hp com networking support The switches support 802 3af and 802 3at standard devices and some pre standardPoEdevices Foralistofthesedevices see theFAQs Frequently Asked Questions for your switch model PoE is disabled by default and must be enable for use For instructions see the Management and Configuration Guide for your swit...

Page 28: ...from common web browsers HP Intelligent Management Center IMC an SNMP based graphical network management tool that you can use to manage your entire network Support for the Spanning Tree Protocol to eliminate network loops Support for up to 256 IEEE 802 1Q compliant VLANs so you can divide the attached end nodes into logical groupings that fit your business needs Support for many advanced features...

Page 29: ...switch is to be shipped in a rack it can be mounted and shipped in any four post rack using HP X410 E Series 1U Universal Rack Mounting Kit J9583A Optionally it can also be mounted in an HP 10K rack using the HP 1U RK MT SWITCH 10K ALL rail kit part number 356578 B21 and shelf kit AB469A HP rx 16 26 Factory Rackmount Shelf Kit both kits must be used otherwise you will void the warranty Included Pa...

Page 30: ...ed on for the first time without a stacking module installed the stacking feature will be disabled and that status will be saved in the switch s running configuration For more information see Stacking Information and Topologies on page 2 25 Country Region Power Cord Argentina Australia New Zealand Brazil Chile China Continental Europe South Korea Denmark India Israel Japan Switzerland South Africa...

Page 31: ...HP 2920 Switch has either four slots for installing SFP transceivers If you have installed an HP 2920 10GbE 2 Port SFP Module you have an additional 2 slots for installing SFP transceivers Depending on where the switch is mounted it may be easier to install the SFP transceivers first SFP transceivers can be installed or removed while the switch is powered on 8 Connect the switch to a power source ...

Page 32: ...uirements In addition be sure to use a power cord displaying the mark of the safety agency that defines the regulations for power cords in your country The mark is your assurance that the power cord can be used safely with the switch and power supply When installing the switch the AC outlet should be near the switch and should be easily accessible in case the switch must be powered off Ensure the ...

Page 33: ... other devices and equipment In the front of the switch leave at least 7 6 cm 3 inches of space for the twisted pair and fiber optic cabling In the back of the switch leave at least 3 8 cm 1 1 2 inches of space for the power cord If you are stacking the switches you will need 20 to 23 cm approximately 8 to 9 inches depending on the lengths of the stacking cables being used On the sides of the swit...

Page 34: ...ower connector on the back of the switch and then into a properly grounded electrical outlet Figure 2 2 Connecting the power cord Not e The HP 2920 switches do not have a power switch They are powered on when the power cord is connected to the switch and to a power source For safety the power outlet should be located near the switch installation The switch automatically adjusts to any voltage betw...

Page 35: ...ing the switch boot The Power Fault Test and Locator LEDs other Status LEDs Mode indicator LEDs and port LEDs are on for most of the duration of the test Most of the LEDs go off and may turn on again during phases of the boot When the switch boots successfully Status LEDs display Power and Tmp LEDs and the PoE LED for PoE switches remain on Fault Test and Locator LEDs are off Other status LEDs may...

Page 36: ... Refer to chapter 5 Troubleshooting for diagnostic help 3 Optional Install 10G Expansion Modules Not e Hot swapping the 10G Expansion Modules is not supported If a module is installed with the switch powered on self test of the module will not occur the Mdl LED on the front of the switch and the Module Status LED on the module will blink orange The switch must be reset or power cycled for the modu...

Page 37: ...D Behavior table below Table 2 1 10G Expansion Module LED Behavior LED Display for a Properly Installed Module Mdl LED on the front of the switch and Module Status LED on the module The LED goes ON as soon as the module is installed and the switch is powered on and stays ON steadily Fault OFF normal state no fault condition exist Link for each network port on the module If networking cables are co...

Page 38: ...function Only insert or remove a module during scheduled downtime with the switch powered off 1 Remove the cover plate 2 Insert the module aligning with the guides in the slot 3 Once the contacts have engaged use the extractor handle to seat the module completely 4 Tighten the captive screws until they are snug do not overtighten them Figure 2 7 Installing the Stacking Module Verifying the Module ...

Page 39: ... Module LED Behavior LED Display for a Properly Installed Module Mdl LED on the front of the switch and Module Status LED on the module The LED goes ON as soon as the module is installed and the switch is powered on and stays ON steadily Fault OFF normal state no fault condition exist Link for each stacking port on the module If stacking cables are connected to the module and to a Stacking Module ...

Page 40: ...ing precautions on page 2 4 before mounting a switch E q u i p m e n t C a b i n e t Not e The 12 24 screws supplied with the switch are the correct threading for standard EIA TIA open 19 inch racks If you are installing the switch in an equipment cabinet such as a server cabinet use the clips and screws that came with the cabinet in place of the 12 24 screws that are supplied with the switch Comp...

Page 41: ...ting the switch so its front face is flush with the face of the rack as shown in the illustration or mounting it in a more balanced position 2 Hold the switch with attached brackets up to the rack and move it vertically until rack holes line up with the bracket holes then insert and tighten the four number 12 24 screws holding the brackets to the rack Figure 2 10 Mounting the switch in a rack ...

Page 42: ...ries 1U Universal Rack Mounting Kit use a 1 Phillips cross head screwdriver and attach the slider brackets to the switch with the included 8 mm M4 screws Figure 2 11 Attaching the rail kit slider brackets to the switch 2 Install the rails in the rack Figure 2 12 Installing the rails 3 Install the switch into the rails 8 mm M4 screws ...

Page 43: ... keep the switch from sliding on the surface Attach the rubber feet to the four corners on the bottom of the switch within the embossed angled lines Use a sturdy surface in an uncluttered area You may want to secure the networking cables and switch power cord to the table leg or other part of the surface structure to help prevent tripping over the cords C a u t i o n Make sure the air flow is not ...

Page 44: ...e tab to make sure that it is fully latched Figure 2 14 Installing a stacking cable b Connect the other end of the cable to a Stacking Module in another HP 2920 switch See page 2 25 for connectivity Not e When switch power is on and one end of the stacking cable is inserted the Link and Mdl LEDs blink orange until the other end is connected to another switch stacking module The LEDs turn solid gre...

Page 45: ...transceivers are not supported and their use may result in product malfunction Should you require additional HP transceivers contact your HP Sales and Service Office or authorized dealer Installing a transceiver Hold the transceiver by its sides and gently insert it into either of the slots on the switch until it clicks into place When a transceiver is inserted the switch authenticates it This can...

Page 46: ...r connector and into a nearby AC power source See Figure 2 2 on page 2 6 2 Re check the LEDs during self test See LED Behavior on page 2 7 S t a c k i n g N o t e If you are stacking your HP 2920 switches then the first switch you should power on is the switch that you want to be the stack Commander The second switch that you power on should be the one that you want to be the stack Standby For the...

Page 47: ...ing with the LEDs on page 5 4 in chapter 5 Troubleshooting To disconnect Press the small tab on the plug and pull the plug out of the jack Connecting Cables to Transceivers If you have any transceivers installed in the switch the type of network connections you will need to use depends on the type of transceivers installed For transceiver ports and in general for all the switch ports when a networ...

Page 48: ...d port status and observe network activity statistics modify the switch s configuration to optimize switch performance enhance network traffic control and improve network security read the event log and access diagnostic tools to help in troubleshooting download new software to the switch add passwords to control access to the switch from the console web browser interface and network management st...

Page 49: ...se steps 1 Type your product model for example 2920 or product number in the Auto Search text box 2 Select one of the switches from the drop down list 3 Click the Display selected button 4 From the options that appear select Software downloads on the right hand side Then download the USB Console Port Drivers and Information Your PC s operating system may also automatically find the correct driver ...

Page 50: ... control set to Xon Xoff For the Windows Terminal program disable uncheck the Use Function Arrow and Ctrl Keys for Windows option For the Hilgraeve HyperTerminal program select the Terminal keys option for the Function Arrow and Ctrl Keys act as parameter If you use a management console with different configuration settings be sure to reconfigure the settings on both the terminal and the switch in...

Page 51: ...g a console cable 3 Power on the management console terminal or PC If you are using a PC start the PC terminal program 4 For a direct console connection through the Console port a Press Enter two or three times to display the copyright page and the message Press any key to continue b Press any key to display the switch console command CLI prompt for example HP 2920 c Continue the console session t...

Page 52: ...nector on the other end Table 2 3 describes the mapping of the RJ 45 to DB 9 pins Figure 2 19 RJ 45 to DB 9 pinouts Table 2 3 Mapping of RJ 45 to DB 9 RJ 45 Signal reference from Chassis DB 9 Signal reference from PC Reserved 1 8 CTS Reserved 2 6 DSR TXD 3 2 RXD Reserved 4 1 DCD GND 5 5 GND RXD 6 3 TXD Reserved 7 4 DTR Reserved 8 7 RTS 9 RI ...

Page 53: ...time without a stacking module installed stacking will be disabled and that will be saved in the switch s running configuration Subsequently after a stacking module has been installed stacking must be enabled through the console CLI command stacking enable To set up a stack of HP 2920 switches you should 1 Power off all switches that are going to be stacked 2 Install Stacking Modules in the switch...

Page 54: ... One of the fragments becomes inactive to make sure that network topology and protocol rules are not violated by the creation of two virtual switches For the inactive fragment the switches remain powered on and create a separate stack but all of network ports on the switches in the inactive fragment become disabled and do not pass network traffic For more information and recovery procedures see th...

Page 55: ...ngle failure because communications between the switches continues in a direction away from the failure Therefore ring topologies are recommended A typical ring topology is illustrated in Figure 2 22 Figure 2 22 Typical ring topology Cable connection examples for stacked rings are illustrated in Figure 2 23 Figure 2 23 Cable connection examples for ring topologies 2 switch ring 4 switch ring ...

Page 56: ...connected to the switch by straight through or crossover twisted pair cables Either cable type can be used because of the Auto MDI X features on the switch Figure 2 24 Example as a Desktop Switch Implementing PoE PoE This illustration is an example of the switch being configured to supply PoE PoE power to end devices such as IP telephones and wireless access points WAPs The end node devices are co...

Page 57: ... 2920 Switch The devices attached to the two other switches can now communicate with each other through the HP 2920 They can also all communicate with the server that is connected to a 1000Base T port on the switch Because the Switch has the Auto MDI X features the connections between the HP 2920 and the other switches and between the switch and end nodes or servers can be through category 5 strai...

Page 58: ...l the devices on these network segments can access other network resources that are connected elsewhere on the network backbone Figure 2 26 Example as a Segment Switch Implementing PoE PoE As shown in Figure 2 28 the IP telephones have been inserted in between the HP 2920 PoE switch and the PCs and a WAP has been connected to the HP 2920 PoE switch Only devices directly connected to the PoE switch...

Page 59: ... the factory default configuration the switch has no IP Internet Protocol address and subnet mask and no passwords In this state it can be managed only through a direct console connection To manage the switch through a networked in band data port or out of band management port connection you must first configure the switch with an IP address and subnet mask compatible with your network Also you sh...

Page 60: ...uration method described in Minimal Configuration Through the Out of Band Console Connection see DHCP Bootp Operation in the Management and Configuration Guide on the HP Networking web site Minimal Configuration Through the Console Port Connection The quickest and easiest way to minimally configure the switch for networked management and password protection is to use the direct out of band connect...

Page 61: ...r network 8 Press Enter then S for Save The following fields are displayed in the Setup screen For more information on these fields see the Management and Configuration Guide which is on the HP Networking web site at www hp com networking support Parameter Default System Name blank Optional up to 25 characters including spaces System Contact blank Optional up to 48 characters including spaces Mana...

Page 62: ...eway node ifnetwork traffic needs to be able to reach off subnet destinations Time Sync Method None Optional The protocol the switch uses to acquire a time signal The options are SNTP and TimeP TimeP Mode Disabled Optional The method the switch uses to acquire the TimeP server address IP Config DHCP Bootp DHCP Bootp Set to Manual unless a DHCP Bootp server is used on your network to configure IP a...

Page 63: ...ement OOBM appendix in the Management and Configuration Guide at www hp com networking support In band networked connection through a data port on the switch To use Connect a PC or UNIX workstation with a VT 100 terminal emulator directly to a switch data port Then access the switch via Telnet from the workstation To use Telnet the switch must have an IP address IP settings can be configured throu...

Page 64: ... IP address 3 You will see the copyright page and the message Press any key to continue Press a key and you will then see the switch console command CLI prompt for example HP 2920 Enter help or to see a list of commands that can be executed at the prompt Entering any command followed by help provides more detailed context help information about the command Entering any command followed by displays...

Page 65: ... the HP Networking web site at www hp com networking support An extensive help system is also available for the web browser interface To access the help system though the subnet on which the switch is installed must have access to the internet or HP IMC needs to be installed on a network management station that is on the subnet Operating System Internet Explorer Java Version Windows 2000 SP4 5 5 S...

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Page 67: ...op swappable The switch must be powered off before installing or replacing any of these modules C a u t i o n The HP 2920 switches and their components are sensitive to static discharge Use an antistatic wrist strap and observe all static precautions when replacing components C a u t i o n Ifa powersupplymustbe removedandthen reinstalled waitatleast5 seconds before reinstallation Otherwise damage ...

Page 68: ...y fails completely the switch will not be powered on when it is connected to an active AC power source To remove an AC power supply 1 Remove the AC power cable from the failed power supply s connector 2 Grasping the handle of the failed power supply release the locking mechanism by squeezing the latch release handle then at the same time pull the power supply straight out Figure 4 1 Replacing a fa...

Page 69: ...G Expansion Module fromit s packaging beingcareful to not touch any of the circuitry on the board 3 Disconnect the networking cables from the failed module You do not need to disconnect the cables from the networking devices at the other ends of the cables 4 Unscrew the two retaining screws on the module 5 Insert the new stacking module fully into the slot as shown in Figure 2 7 on page 2 10 The f...

Page 70: ...y on the board 3 Disconnect the stacking cables from the failed module You do not need to disconnect the cables from the switches at the other ends of the cables 4 Unscrew the two retaining screws on the module 5 Pull the extractor handle toward you and outward until it stops and then pull the module straight out 6 Insert the new stacking module fully into the slot as shown in Figure 2 7 on page 2...

Page 71: ... based network management tool For more information see the chapter Troubleshooting in the Management and Configuration Guide for your switch which is on the HP Networking web site at www hp com networking support You may want to bookmark this web page for easy access in the future This chapter describes the following Basic Troubleshooting Tips page 5 2 Diagnosing with the LEDs page 5 4 Proactive ...

Page 72: ...e Make sure that all devices connected to the switch are configured to auto negotiate or are configured to connect at half duplex all hubs are configured this way for example Faulty or loose cables Look for loose or obviously faulty connections If they appear to be OK make sure the connections are snug If that does not correct the problem try a different cable Non standard cables Non standard and ...

Page 73: ...ich allows multiple network cables to be used for a single network connection without causing a data path loop For more information on Spanning Tree and Trunking see the Management and Configuration Guide for your switch at www hp com networking support Check the port configuration A port on your switch may not be operating as you expect because it has been put into a blocking state by Spanning Tr...

Page 74: ...Fan PS Mdl Port Link LED off with power cord plugged in 1 on prolonged on prolonged on 2 on blink orange blink orange 3 on blink orange off blink orange 4 on blink orange blink orange blinkorange 5 on off off off with cable connected 6 on off off on but no activity on the port 7 on blink orange blink orange 8 on blink orange blink orange 9 on blink orange blink orange 10 on blink orange blink oran...

Page 75: ...he switch Messages should appear on the console screen and in the console log identifying the error condition You can view the console log at that point by selecting it from the console Main Menu If necessary to resolve the problem contact your HP authorized LAN dealer or use the electronic support services from HP to get assistance See HP Customer Support Services on page 5 15 4 One or more of th...

Page 76: ...ive port is connected to the transmit port on the connected device For 1000Base T connections verify that the network cabling complies with the IEEE 802 3ab standard the cable should be installed according to the ANSI TIA EIA 568 A 5 specifications Cable testing should comply with the stated limitations for Attenuation Near End Crosstalk Far End Crosstalk Equal Level Far End Crosstalk ELFEXT Multi...

Page 77: ...e switch If it is not the problem may be with the cabling between the devices or the connectors on the cable 8 The power supply has experienced a fault Check the power supply to make sure it is plugged in to an active power source If this is ok but the LEDs are still blinking the power supply may have failed Try unplugging and then replugging the power supply If the fault light is still blinking r...

Page 78: ...blink orange see tip 3 off blink orange off 4 off on blink orange 5 off on blink orange all off 6 off blink orange blink orange blink orange 7 off off blink orange on on 8 This LED is not important for the diagnosis The blinking behavior is an on off cycle once every 1 6 seconds approximately The Mdl LED is on the switch front It is replicated by the Mdl Status LED on the stacking module itself No...

Page 79: ...operational When installing or removing the Stacking Module the switch should be powered off 3 One of these problems exists The stacking cable connected to the stacking port on which the Link LED is blinking orange is not connected at the far end A stacking link failure has occurred on a link that was functioning the switch at the other end of the stackingcablehasbeenpoweredoff The stacking featur...

Page 80: ... original topology so that the switches can reform the original stack 6 A stack link failure has occurred in a chain topology and multiple stack fragments have been created One of the fragments has been made inactive according to the rules of the stack operation All the network ports on the switches in the inactive fragment are disabled As a result all the port LEDs are off for those switches Repa...

Page 81: ...ke advantage of these proactive networking features HP Intelligent Management Center HP IMC an SNMP based network management tool PCM is supported A graphicalweb browser interface that you can use to manage your switch from a PC running a supported web browser for example Microsoft Internet Explorer and Netscape Communicator A full featured easy to use console interface that you can access by conn...

Page 82: ... Self Test LEDs on the front of the switch go off after approximately 50 seconds If these LEDs stay on longer than 60 seconds or begin blinking there may be a problem with the switch See Diagnosing With the LEDs on page 5 4 for information on interpreting the LED patterns and LED behaviors in chapter one Checking Console Messages Useful diagnostic messages may be displayed on the console screen wh...

Page 83: ... networks that sends test packets to any device identified by its IP address These tests can be performed through the switch console interface from a terminal connected to the switch or through a Telnet connection or from the switch s web browser interface For more information see the Management and Configuration Guide for your switch at www hp com networking support These tests can also be perfor...

Page 84: ...ation prior to performing the factory default reset Then after the reset and resolution of the original problem you can restore the saved configuration to the switch For both the save and restore processes you can use the console copy command For more information on this command see the Management and Configuration Guide for your switch at www hp com networking support You can restore the factory ...

Page 85: ...m networking support Additionally your HP authorized network reseller can provide you with assistance both with services that they offer and with services offered by HP Before Calling Support Before calling your networking dealer or HP Support to make the support process most efficient you first should have retrieved the following informa tion Information Item Information Location product identifi...

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Page 87: ...oE Switches J9727A J9729A with HP X332 575W Power Supply J9738A HP 2920 Non PoE Switches J9726A J9728A with HP X331 165W Power Supply J9739A Electrical AC voltage Maximum current Frequency range 100 240 V 9 0 4 0 A 1 50 60 Hz The switch automatically adjusts to any voltage between 100 240 VAC and either 50 or 60 Hz 100 240 VAC 2 50 1 25 A1 50 60 Hz Theswitchautomaticallyadjuststoanyvoltage between...

Page 88: ...9 F Maximum Operating Altitude 3 0 km 10 000 ft Non Operating Altitude 4 6 km 15 000 ft Acoustics HP 2920 24G Switch J9726A Geraeuschemission LpA 35 9 dB am fiktiven Arbeitsplatz nach DIN 45635 T 19 Noise Emission LpA 35 9 dB at virtual workspace according to DIN 45635 T 19 HP 2920 24G PoE Switch J9727A Geraeuschemission LpA 37 1 dB am fiktiven Arbeitsplatz nach DIN 45635 T 19 Noise Emission LpA 3...

Page 89: ... Product Laser Klasse 1 1000 SX IEEE 802 3z 1000BASE SX EN IEC 60825 Class 1 Laser Product Laser Klasse 1 1000 LX IEEE 802 3z 1000BASE LX EN IEC 60825 Class 1 Laser Product Laser Klasse 1 1000 LH not an IEEE standard EN IEC 60825 Class 1 Laser Product Laser Klasse 1 1000 BX IEEE 802 3ah 1000BASE BX10 EN IEC 60825 Class 1 Laser Product Laser Klasse 1 10 Gig Direct Attach not an IEEE standard 10 Gig...

Page 90: ...0 62 mm 4 18 in 3 56 mm 1 4 in HP 2920 2 Port 10GBASE T Module J9732A 0 159 kg 0 35 lb 106 17 mm 4 18 in 104 39 mm 4 11 in 35 56 mm 1 40 in Operating Temperature 0 C to 55 C 32 F to 131 F Relative Humidity 32ºF to 113ºF 0ºC to 45ºC Non Operating Temperature 40 C to 70 C 40 F to 158 F Non Operating Relative Humidity 15 to 90 at 65 C 149 F Maximum Operating Altitude 3 0 km 10 000 ft Non Operating Al...

Page 91: ... kg 0 35 lb 6 83 mm 2 69 in 20 5 mm 8 07 in 2 87 mm 1 13 in Operating Temperature 0 C to 55 C 32 F to 131 F Operating Relative Humidity 15 to 95 at 40 C 104 F non condensing Non Operating Temperature 40 C to 70 C 40 F to 158 F Non Operating Relative Humidity 15 to 90 at 65 C 149 F Maximum Operating Altitude 3 0 km 10 000 ft Non Operating Altitude 4 6 km 15 000 ft ...

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Page 93: ...y 5e or better is recommended See Note on 1000BASE T Cable Requirements below 10 Gbps Operation Category 6 or 6A 100 ohm 4 pair UTP cable or Category 6A or 7 100 ohm 4 pair STP cable complying with IEEE 802 3an 10GBASE T specifications SeeNoteon10GBASE TCableRequirementsbelow and see Table B 2 for distances supported with each cable type Twinaxial copper Direct attach cables One piece devices cons...

Page 94: ... for 1000BASE T connections may work for 10GBASE T as long as the distance is less than 55m and the cable installation has been tested for compliance to IEEE requirements But for the most robust connections you should use cabling that complies with the Category 6A or Category 7 specifications as described in the TIA 568 C ANSI TIA 568 C 2 and ISO IEC 11801 standards 10GBASE T is a sophisticated te...

Page 95: ...lded up to 55 meters1 Cat 6 shielded up to 100 meters1 Cat 6A unshielded up to 100 meters Cat 6A shielded up to 100 meters Cat 7 shielded up to 100 meters 1000 SX multimode fiber 160 MHz km 200 MHz km 400 MHz km 500 MHz km 2 220 meters 2 275 meters 2 500 meters 2 550 meters 1000 LX multimode fiber single mode fiber 400 MHz km 500 MHz km N A 2 550 meters 2 550 meters 2 10 000 meters 1000 LH single ...

Page 96: ... CRC or FCS errors you may need to install one of these patch cords between the fiber optic port in your switch and your multimode fiber optic network cabling at both ends of the network link The patch cord consists of a short length of single mode fiber cable coupled to graded index multimode fiber cable on the transmit side and only multimode cable on the receive side The section of single mode ...

Page 97: ...hen connect the other end of the patch cord to your network cabling patch panel or directly to the network multimode fiber If you connect the patch cord directly to the network cabling you may need to install a female to female adapter to allow the cables to be connected together Figure B 1 Example Connecting a Mode Conditioning Patch Cord for Gigabit LX Make sure you purchase a patch cord that ha...

Page 98: ... In all cases you can use standard straight through cables or crossover cables If you happen to use a correctly wired crossover cable though the switch will still be able to automatically detect the MDI MDI X operation and link correctly to the connected device Other Wiring Rules All twisted pair wires used for 10 Mbps and 100 Mbps operation must be twisted through the entire length of the cable T...

Page 99: ...mple 100 Mbps Full Duplex the ports operate as MDI X ports and straight through cables must be then used for connections to PC NICs and other MDI ports Cable Diagram Not e Pins 1 and 2 on connector A must be wired as a twisted pair to pins 1 and 2 on connector B Pins 3 and 6 on connector A must be wired as a twisted pair to pins 3 and 6 on connector B Pins 4 5 7 and 8 are not used in this applicat...

Page 100: ... Duplex the ports operate as MDI X ports and crossover cables must be then used for connections to hubs or switches or other MDI X network devices Cable Diagram Not e Pins 1 and 2 on connector A must be wired as a twisted pair to pins 3 and 6 on connector B Pins 3 and 6 on connector A must be wired as a twisted pair to pins 1 and 2 on connector B Pins 4 5 7 and 8 are not used in this application a...

Page 101: ...on connector A must be wired as a twisted pair to pins 1 and 2 on connector B Pins 3 and 6 on connector A must be wired as a twisted pair to pins 3 and 6 on connector B Pins 4 and 5 on connector A must be wired as a twisted pair to pins 4 and 5 on connector B Pins 7 and 8 on connector A must be wired as a twisted pair to pins 7 and 8 on connector B Pin Assignments For 1000Base T operation all four...

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Page 103: ...ents 2 5 cables twisted pair Auto MDIX feature B 6 category 3 4 5 B 6 connector pin outs B 6 cross over cable pin out B 8 MDI X to MDI connections B 7 B 9 MDI X to MDI X connections B 8 pin outs B 7 B 9 straight through cable pin out B 7 B 9 switch to computer connection B 7 B 9 switch to switch or hub connection B 8 wiring rules B 6 cabling infrastructure 2 5 chain stacking topology 2 26 Clear bu...

Page 104: ...D 1 8 Fault LED 1 7 behavior during self test 2 7 behaviors 1 7 blinking definition 1 9 1 10 location on switch 1 2 showing error conditions 5 4 FDx LED 1 8 features console 2 20 switch 1 19 fiber optic cables 1000Base BX B 3 1000Base LH B 3 front of switch 1 2 10 100Base TX ports 1 2 Clear button 1 12 description 1 2 LEDs 1 7 network ports 1 4 port LED view select button and LEDs 1 11 Reset butto...

Page 105: ...o MDI X network cable B 8 Mode LEDs 1 7 module install or remove 2 10 module slot 1 14 mounting the switch in a rack or cabinet 2 12 precautions 2 4 on a horizontal surface 2 15 N network cables Auto MDIX feature B 6 required types 2 5 twisted pair wiring rules B 6 twisted pair connector pin outs B 6 network devices connecting to the switch 2 19 network ports connecting to 2 19 location on switch ...

Page 106: ...he switch factory default reset 5 14 location of Reset button 1 12 troubleshooting procedure 5 12 ring stacking topology 2 27 S safety specifications A 2 segment switch sample topology 2 29 selecting the Port LED View display 1 11 self test Fault LED behavior 2 7 Power LED behavior 2 7 SFPs location on switch 1 2 slots for SFPs location on switch 1 2 Spd LEDs 1 8 specifications electrical A 1 envi...

Page 107: ...s 2 27 transceivers full duplex operation 2 17 slot location on switch 1 2 troubleshooting 5 1 basic tips 5 2 checking port configuration 5 3 checking the console messages 5 12 checking the LEDs 5 12 common network problems 5 2 connecting to fixed full duplex devices 5 2 diagnostic tests 5 12 effects of improper topology 5 2 effects of non standard cables 5 2 link test 5 13 Ping test 5 13 Proactiv...

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Page 110: ... subject to change without notice 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 will not be liable for technical or editorial errors or omissions contained herein February 2013 Manual Part Number 5998 3582 ...

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