HP AdvanceStack Switching Hubs Reference Guide
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HP Customer Support Services How to get the latest software/agent firmware The hub does not have updatable firmware. You can update the following modules: HP Management Module firmware: j3210a.exe HP Switch Module firmware: j3212a.exe from the HP BBS, HP FTP Library Service, CompuServe, and the World Wide Web. After you download the file, extract the file by typing: filename /x. For example, j3210a.
HP FIRST Fax Retrieval Service HP FIRST is an automated fax retrieval service that is available 24 hours a day, seven days a week. HP FIRST provides information on the following topics: ■ ■ ■ ■ Product information Troubleshooting instructions Technical reviews and articles Configuration information To access HP FIRST, dial one of the following phone numbers: Location Phone Number U.S. and Canada Only Dial 1 (800) 333-1917 with your fax machine or touch-tone phone and press 1. Outside the U.S.
Contents 1 Switching Hub Features Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Front of the Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 LED Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Hub Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Testing the Hub or Stack of Hubs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Testing Twisted-Pair Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 HP Customer Support Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 A Cables and Connectors Recommended Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 Switching Hub Features Introduction With the Switching Hubs, you can connect computers, servers, and printers together in an Ethernet network for sharing files. These hubs can coexist with any IEEE 802.3 Type 10Base-T standard hub including HP AdvanceStack and HP EtherTwist products. The three Switching Hub models are: HP J3200A Switching Hub-12R HP J3202A Switching Hub-24R HP J3204A Switching Hub-24T Each hub has four segments or collision domains. By default, all users are put on segment 1.
Switching Hub Features Front of the Hub Switching Hub Features Front of the Hub LED Operation LED State Meaning Power (green) Off The hub is not receiving power. On The hub is receiving power. On The hub has failed its self-test after being powered on or reset. Flashing Slowly* A port has partitioned or a connected RPS has a failure. The corresponding LED will also flash. Off The normal state. Indicates that there are no fault conditions on the hub.
Switching Hub Features Front of the Hub LED State Shows the activity and collision status for each segment. Segment 2-4 LEDs flicker if you have moved ports to these segments using an optional Management Module and/or Switch Module. Flickering Flickering Xcvr Collision LED: If collisions are infrequent (which is normal) the light may be imperceptible. In a network with heavy traffic, the Col LED will glow and flicker dimly, indicating collisions are occurring.
Switching Hub Features Front of the Hub Switching Hub Features Hub Identification Below the AUI/Xcvr (Transceiver) port is a label with the Hub Identification number and serial number. The Hub Identification number is displayed in the ASCII console and HP AdvanceStack Assistant to identify the hub in the stack. The format is: 123-1234567 The Hub Identification number is not the MAC address. The Switching Hub does not have a MAC address because it cannot be managed without a Management Module.
Switching Hub Features Front of the Hub Extender Cables As one segment, the connected stack of hubs are considered to be one repeater hop. On initial bootup, all users are placed on segment 1 if no Management Module is present. Extender Cable 1 2 3 4 One repeater hop 5 6 7 8 Without the Extender Cable, each Switching Hub has its own collision domain. If you need to manage your stack of hubs, or segment your hubs into different collision domains, see chapter 2, “Optimizing Your Network”.
Switching Hub Features Front of the Hub Switching Hub Features Each stack can have a maximum of two 71 cm (28-inch) cables. Using two 28inch cables and five 12.5-inch cables, the maximum distance is 2.9 meters (9.9 feet). The following illustration shows a stack of hubs and Long Extender Cable connections that go over an HP Switch 2000 and to a hub in another stack:.
Switching Hub Features Back of the Hubs Power Connector The hub does not have a power switch; it is powered on when the power cord is plugged into the power connector. The Switching Hubs automatically adjusts to any voltage between 100-127 and 200-240 volts and either 50 or 60 Hz. There are no voltage range settings required. If a hub were to fail, all of the other hubs connected to the Extender Cable remain operating because they have separate power cords.
Switching Hub Features How the Hub Works Switching Hub Features How the Hub Works The HP AdvanceStack Switching Hubs are multiport repeaters that conform to the IEEE 802.3 repeater specification. Data signals coming into the hub from any of its ports are automatically regenerated and transmitted to all the other network ports on the same segment in the hub stack. The hub regenerates the data without interpreting the contents, so it can be used in either IEEE 802.
Switching Hub Features How the Hub Works Auto-Partitioning The hub will automatically partition (temporarily disable) a network port for the following reasons: ■ a collision condition exists for an excessive duration (between 1024 and 2048 bit times) ■ a collision occurs during each of 32 consecutive attempts to transmit ■ Installed optional transceiver has SQE test enabled instead of disabled The hub monitors the partitioned port and automatically re-enables the port when a minimum length packet can
Switching Hub Features How the Hub Works Switching Hub Features Link Beat Type 10Base-T devices use a signal called link beat (also called link test pulse). This signal informs the hub of the presence of a device connected to it over twisted-pair cable and of the integrity of the twisted-pair link between them. The hub will not transmit packets out of twisted-pair ports that do not sense the link beat signal.
2 Optimizing Your Network If your Col(ision) and/or Act(ivity) LEDs are mostly on rather than flickering, you can optimize your network by adding these optional modules: ■ Management Module and Switch Module to automatically distribute users onto the different segments ■ Management Module only to manually distribute users over your network onto the different segments Because the Switch Module needs a Management Module in the stack, you can configure, troubleshoot, and monitor your network with either se
Optimizing Your Network Automatically Segmenting Your Network Automatically Segmenting Your Network If you have multiple servers connected to your hubs, you can improve access time to the servers by adding a switch. You can add an internal switch module or external switch. Reasons for Using an Internal vs. External Switch Optimizing Your Network Some of the main differences between an internal and external switch are listed in below.
Optimizing Your Network Automatically Segmenting Your Network HP Internal Switch Module Features The plug-and-play HP J3212A AdvanceStack 10BT Switch Module inserts into the Expansion Slot of your Switch Hub. Xcvr Fault Requires HP J3210A Management Module Optimizing Your Network The features of the Switch Module are: ■ Automatic Port Switching.
Optimizing Your Network Managing Your Network with the Management Module Managing Your Network with the Management Module By adding the optional HP J3210A Management Pack to any hub in your stack, you can configure, diagnose, and troubleshoot your stack of hubs. Optimizing Your Network Active Base MAC Address The features of this module are: 2-4 ■ Port Switching. The ability to distribute any stack ports onto 4 available segments.
3 Troubleshooting This chapter describes how to troubleshoot your stack of hubs. Note that if you have a Management Module, you can troubleshoot your hubs using software. See the Management Module manual for more information. This chapter describes how to troubleshoot your hub using: ■ solutions to common problems ■ LEDs ■ diagnostic tests Solutions to Common Problems Most problems are caused by the following situations: ■ Incorrect Hub-to-Hub connections.
Troubleshooting LED Error Indications LED Error Indications Use the following table to troubleshoot your stack of hubs using the LEDs. Troubleshooting LED patterns indicating problems Diagnostic Tips Power Collision Fault Security RPS Port OFF * * * * * ON * OFF OFF * OFF or Link beat has not been detected. Check that the cabling on flashing the indicated port is connected properly. Bad cables are intermitt common; try a different cable.
Troubleshooting Diagnostic Tests LED patterns indicating problems Diagnostic Tips Power Collision Fault Security RPS Port ON ON Variable, A hub hardware failure was detected during self-test. Selfall may test does not complete so the LEDs will stay on longer than be ON 60 seconds. * ON * Power cycle the hub. If this condition persists, the hub may have to be replaced. Contact your HP-authorized LAN dealer or HP representative for assistance. * This LED is not important for the diagnosis.
Troubleshooting HP Customer Support Services Testing Twisted-Pair Cabling If you think the cable should work but still isn’t working, it may not be compatible with the IEEE 802.3 Type 10Base-T standard. The twisted-pair cable attached to the HP Switching Hub must be compatible with this standard. To verify that your cable is compatible with this standard, you can use the HP J2263A Cable Test Set. The older HP 28687A Wire Test Instrument can also be used.
A Cables and Connectors This appendix lists cables that have been tested and verified for use with the HP Switching Hubs. It also includes minimum pin-out information so, if you wish to use an unlisted cable, you can verify that the cables used in your installation are correctly wired. Note that each pin-out does not necessarily match the pin-out for the corresponding HP cable, but cables manufactured to follow the minimum pin-out will function correctly.
Cables and Connectors Twisted-Pair Cable/Connector Pin-Outs Twisted-Pair Cable/Connector Pin-Outs Twisted-Pair Cable for Hub-to-Computer Network Connection To connect PCs or other network devices to the hub, use a “straight-through” Category 3, 4, or 5 cable. The twisted-pair wires must be twisted through the entire length of the cable. The wiring sequence must conform to AT&T 258A (not USOC). See “Twisted-Pair Cable Pin Assignments” later in this chapter for a listing of the signals used on each pin.
Cables and Connectors Twisted-Pair Cable/Connector Pin-Outs Twisted-Pair Cable Pin Assignments Twisted-Pair Straight-Through Cable Hub End Computer or Transceiver End Computer or Transceiver End Signal Pins Pins Signal (receive +) (receive -) (transmit +) (transmit -) 1 2 3 6 1 2 3 6 (transmit +) (transmit -) (receive +) (receive -) Cables and Connectors A-3
B Specifications Physical Width 44.2 cm (17.4 in) Depth 29.8 cm (11.7 in) Height 6.6 cm Weight Hub-12R Hub-24R Hub-24T 4.4 kg (9.71 lb) 4.5 kg (9.95 lb) 4.4 kg (9.75 lb) Electrical The Switching Hubs automatically adjusts to any voltage between 100-127 and 200-240 volts and either 50 or 60 Hz.) AC voltage: 100-127 volts 200-240 volts Maximum current: 1.1 A 0.
Specifications Specifications Environmental Operating Non-Operating Temperature +0°C to +55°C (32°F to 131°F) -40°C to 70°C (-40°F to 158°F) Relative humidity (non-condensing) 15% to 95%at 40°C (104°F) 15% to 90% at 65°C (149°F) Maximum altitude 4.6 km (15,000 ft) 4.6 km (15,000 ft) Connectors The 50-pin and RJ-45 twisted-pair ports are compatible with the IEEE 802.3 Type 10Base-T standard.
C Safety and Regulatory Statements This chapter covers the following topics: ■ mounting precautions ■ power precautions ■ safety and regulatory statements ■ Declaration of Conformity Mounting Precautions When you put a hub into a rack, follow these mounting precautions: ■ The rack or cabinet should be adequately secured to prevent it from becoming unstable and/or falling over.
Safety and Regulatory Statements Power Precautions Power Precautions Follow these precautions when unplugging and plugging in power to the hub as well as adding or removing modules. Warning Safety and Regulatory Statements ! Before installing an optional module into the Expansion Slot, Management Slot, or transceiver slot, unplug the hub. Electrical shock or other injury can result if you attempt to install the module without unplugging the hub.
Safety and Regulatory Statements Safety Information Safety Information ! Documentation reference symbol. If the product is marked with this symbol, refer to the product documentation to get more information about the product. WARNING A WARNING in the manual denotes a hazard that can cause injury or death. CAUTION A CAUTION in the manual denotes a hazard that can damage equipment. Grounding These are safety class I products and have protective earthing terminals.
Safety and Regulatory Statements Informations concernant la sécurité Informations concernant la sécurité ! Symbole de référence à la documentation. Si le produit est marqué de ce symbole, reportez-vous à la documentation du produit afin d'obtenir des informations plus détaillées. WARNING Dans la documentation, un WARNING indique un danger susceptible d'entraîner des dommages corporels ou la mort.
Safety and Regulatory Statements Hinweise zur Sicherheit Hinweise zur Sicherheit ! Symbol für Dokumentationsverweis. Wenn das Produkt mit diesem Symbol markiert ist, schlagen Sie bitte in der Produktdokumentation nach, um mehr Informationen über das Produkt zu erhalten. Symbol für Dokumentationsverweis. Wenn das Produkt mit diesem Symbol markiert ist, schlagen Sie bitte in der Produktdokumentation nach, um mehr Informationen über das Produkt zu erhalten. CAUTION Symbol für Dokumentationsverweis.
Safety and Regulatory Statements Considerazioni sulla sicurezza Considerazioni sulla sicurezza ! Simbolo di riferimento alla documentazione. Se il prodotto è contrassegnato da questo simbolo, fare riferimento alla documentazione sul prodotto per ulteriori informazioni su di esso. WARNING La dicitura WARNINGdenota un pericolo che può causare lesioni o morte. CAUTION La dicituraCAUTION denota un pericolo che può danneggiare le attrezzature.
Safety and Regulatory Statements Consideraciones sobre seguridad Consideraciones sobre seguridad ! Símbolo de referencia a la documentación. Si el producto va marcado con este símbolo, consultar la documentación del producto a fin de obtener mayor información sobre el producto. WARNING Una WARNING en la documentación señala un riesgo que podría resultar en lesiones o la muerte. CAUTION Una CAUTION en la documentación señala un riesgo que podría resultar en averías al equipo.
Safety and Regulatory Statements Safety Information (Japanese) Safety and Regulatory Statements Safety Information (Japanese) C-8
Safety and Regulatory Statements Regulatory Statements Regulatory Statements FCC Class A Statement (for U.S.A. Only) when using unshielded cables: FCC Class B Statement (for U.S.A. Only) when using shielded cables: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against interference in a residential installation.
Safety and Regulatory Statements Regulatory Statements VCCI Class 1 (For Japan Only) when using unshielded cables Safety and Regulatory Statements VCCI Class 2 (For Japan Only) when using shielded cables European Community This equipment complies with ISO/IEC Guide 22 and EN55022 Class A with unshielded cables and EN55022 Note With unshielded cables this is a Class A product.
Safety and Regulatory Statements Declaration of Conformity Declaration of Conformity The following Declaration of Conformity for the HP AdvanceStack 10BT Switching Hubs complies with ISO/IEC Guide 22 and EN 45014. The declaration identifies the product, the manufacturer’s name and address, and the applicable specifications that are recognized in the European community.
Index A auto-segmentation See partitioning B backup Management Modules … 2-4 blinking rates definition for … 1-3 HP Interconnect Manager See HP AdvanceStack Assistant HP Redundant Power Supply (RPS) connector … 1-7 LED … 1-2 hub identification … 1-4 operation … 1-8 I C cables managing … 1-7 twisted-pair connector pin-outs … A-2 category 3, 4, 5 cables … A-2 collision detection … 1-8 D diagnostic tests … 3-3 testing the hub only … 3-3 testing twisted-pair cabling … 3-4 distance of Extender Cables … 1-6
P X partitioning … 1-9 port mobility See port switching port switching … 2-4 power connector … 1-7 Power LED … 1-2 power supply, additional See HP Redundant Power Supply Xcvr (Transceiver) LED … 1-3 R rapid flash rate definition … 1-3 redundant backup link … 2-4 repeater hop count … 1-5 resetting the hub troubleshooting procedure … 3-3 RPS (Redundant Power Supply) LED … 1-2 S Security feature in Management Module … 2-4 LED … 1-2 Segment Display button … 2-4 segments connecting together … 2-3 slow flash
