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Glossary

Glossary-3

local area network (LAN)

A group of interconnected computers and support devices.

screened twisted-pair (ScTP)

A 100–ohm screened twisted–pair cable.

unshielded twisted-pair (UTP)

Cable composed of two insulated wires twisted together to reduce electrical
interference; used in common telephone cord.

Содержание DEL8X

Страница 1: ...lationandConfiguration Part Number EK DEL8X IN A01 This guide describes how to install and configure the EtherWORKS Switch 8T TX Revision Update Information This is a new guide Digital Equipment Corpo...

Страница 2: ...emark of Intel Corporation NetWare is a registered trademark of Novell Inc Xerox is a registered trademark of Xerox Corporation All other trademarks and registered trademarks are the property of their...

Страница 3: ...ex Mode 1 2 Fast Ethernet 1 3 Switching Methods 1 3 Cut Through Switching 1 3 Fragment Free Cut Through Switching 1 4 Store and Forward Switching 1 4 Adaptive Cut Through Switching 1 4 Features 1 4 2...

Страница 4: ...orts 2 11 Station Ports 2 12 Daisy Chain Port 2 12 Power Socket 2 12 3 Hardware Installation Overview 3 1 Preinstallation Requirements 3 1 Hardware Installation 3 2 Stacking the DEL8X Without a Rack 3...

Страница 5: ...gnosing DEL8X LEDs A 1 System Diagnostics A 2 Power and Cooling Problems A 2 Installation A 2 Transmission Mode A 2 Cabling A 3 External Adapters A 3 Configuration A 3 DEL8X Integrity A 3 B General In...

Страница 6: ...vi C Limitations of Shared Ethernet Single Collision Domain C 1 Failure of Alternate Solutions C 2 Glossary...

Страница 7: ...perienced network installer It describes how to install and configure Digital s EtherWORKS Switch 8T TX also referred to as the DEL8X or switch Package Contents The EtherWORKS Switch 8T TX package con...

Страница 8: ...ubber feet Rackmount brackets and screws LJ 5447 AI4 2 1 3 4 EtherWORKS Switch 8TTX Configure Power Util Forward Filter Demo Full Half Diag Ethernet Status Collision 30 20 10 5 1 100TX TX RX Full Dupl...

Страница 9: ...8 pin MJ crossover wired x ports on the DEL8X These ports use autosensing to dynamically set the transmission speed at 10 Mb s or 100 Mb s The transmission mode is dynamically set to half or full dupl...

Страница 10: ...his information is subsequently used to filter packets whose destination address is on the same segment as the source address Network traffic is thereby confined to its respective domain reducing the...

Страница 11: ...he media access control MAC layer the DEL8X is protocol independent and therefore compatible with IEEE 802 3 IEEE 802 3u TCP IP NetWare DECnet and XNS protocols The DEL8X can be configured as a standa...

Страница 12: ...rom a few servers To install the DEL8X use your current network infrastructure including wiring and network interface cards NICs Afterwards you can configure and monitor the system using the DEL8X fro...

Страница 13: ...rough Switching To ensure that you can manage any kind of network load the DEL8X uses this method of switching based on its smart algorithm Adaptive cut through switching dynamically changes the way i...

Страница 14: ...pable of filtering and forwarding Ethernet packets at line speed Nonblocking crossbar switching matrix allows concurrent operation of up to eight Ethernet segments Uses back pressure to eliminate fram...

Страница 15: ...Panel The front panel on the DEL8X shown in the following figure provides a simple interface for configuring or monitoring network connections It includes a Configure button power LED display mode LED...

Страница 16: ...ote________________________________ The term long press means to press the Configure button for more than 2 seconds then release it The term short press means to press the Configure button then immedi...

Страница 17: ...Diag Full Half 1 4 2 3 5 Power LED The power LED indicates the conditions described in the following table LED Activity Condition Indication Blinking light ON Unit is receiving power No light OFF Pow...

Страница 18: ...creasingly improbable For full duplex transmissions no collisions occur because the port serves as a dedicated link for the attached device The collision LEDs assist the network manager in monitoring...

Страница 19: ...layed by this LED see the following table LED Activity Condition Indication No light OFF Port is set at 10 Mb s Steady light ON Port is set at 100 Mb s __________________________ Note_________________...

Страница 20: ...on associated with the port LED Activity Condition Indication Steady light ON Valid link has been established on this port No light OFF No valid link has been established on this port ________________...

Страница 21: ...EDs represent the percentage of network utilization The corresponding LEDs light to show that the utilization of LAN bandwidth has reached this percentage see the following table When active these LED...

Страница 22: ...percentage of packets that must be filtered from the DEL8X by bridging hardware because the destination address is on the same segment connected to the receiving port When viewing these LEDs remember...

Страница 23: ...ompleted If the test does not complete successfully the corresponding LEDs described in the following table and sections will flash after test completion to indicate which component failed the test __...

Страница 24: ...port to full duplex or half duplex operation Use the Configure button to light the Full Half display mode LED indicating that the transmission mode may now be set Refer to the previous Configure Butt...

Страница 25: ...ore if any device attached to the DEL8X must run at full duplex but does not support autonegotiation you may want to upgrade the device Full duplex operation applies only to point to point access for...

Страница 26: ...u can connect this port to a crossover wired x port on the target device using a straight through 100 ohm ScTP or UTP cable Use a minimum of Category 5 ScTP or UTP cable for 100 Mb s connections or a...

Страница 27: ...3 3 1 3 Software Installation Configuration and Diagnostics...

Страница 28: ...component fails during the test the DEL8X will try to complete the diagnostic procedure Otherwise the system will hang For related information refer to the Diagnostics Display Mode section in Chapter...

Страница 29: ...ion on transmit receive and link status Bandwidth Utilization Active LED Util ON In this mode the statistical LEDs the LED array labeled show the percentage of valid data handled by each port on the s...

Страница 30: ...in again __________________________ Note_____________________________ Full duplex mode can be used only for a dedicated link When connecting to a shared collision domain for example a repeater hub se...

Страница 31: ...ication 100TX ON Communications have been set to 100 Mb s TX RX ON Traffic is traversing the port Full Duplex ON Communications have been set to full duplex mode Select Link ON Port has established a...

Страница 32: ...e fully transparent bridging functions automatically learn node addresses which are subsequently used to filter and forward all traffic based on the destination address When traffic passes between dev...

Страница 33: ...an easily build on this basic configuration adding direct full duplex connections to PCs workstations or servers up to 200 Mb s of dedicated bandwith per node When further expansion is needed you can...

Страница 34: ...EL8X no longer have to cross the backbone now reaching each other at near zero latency However for high bandwidth applications that must pass data across the network backbone each port can still provi...

Страница 35: ...hereby significantly expanding overall throughput The DEL8X also helps you to centralize multiple servers in a single location easing supervision and maintenance see the following figure Server Farm 1...

Страница 36: ..._________________________________________________ High Speed Link Between Switches The most common LAN implementations use a combination of standard repeater hubs bridges and routers The bridges and r...

Страница 37: ...Full Duplex 200 M Links Full Duplex 200 M Link 10 M 200 M 200 M 100 M Ethernet Work Group Power User Power User Ethernet Work Group 10Base T Repeater 100Base TX Repeater EtherWORKS Switch 8TTX Config...

Страница 38: ...LED does not light green after making a connection Computer s NIC cable or DEL8X port is defective Verify that the switch and attached device are on Be sure the cable is plugged into both the switch a...

Страница 39: ...est them in an alternate environment where you are sure that all the other components function properly Transmission Mode If you have any attached devices that operate at full duplex mode but do not s...

Страница 40: ...able is used A crossover cable should be used only if the daisy chain port is not available on either switch External Adapters Verify the following 1 The network adapter cards installed in the compute...

Страница 41: ...nnector pin assignments Other Digital network adapter products Physical Description The DEL8X switch measures 440 mm 17 37 inches by 285 mm 11 25 inches and is 43 mm 1 69 inches in height The switch w...

Страница 42: ...VCCI Class I CE Mark Safety UL CSA TUV GS Immunity IEC 801 2 3 4 6 Power requirements 100 Vac to 240 Vac 50 or 60 Hz 45 W maximum Bridging Criteria The following table lists the bridging criteria for...

Страница 43: ...ate Idle Operate DEL8X 6 1 44 Current values for specific configurations are available from Digital Equipment Corporation representatives 1 B 10 dBA Schallemissionswerte Werteangaben nach ISO 9296 und...

Страница 44: ...achment plug rated 15A 125V 240 Volts for North America UL Listed CSA Certified Cord Set Minimum 18 AWG Type SVT or SJT three conductor cord Maximum length of 15 feet Tandem blade grounding type attac...

Страница 45: ...ork connector pin signals are shown in the following figure and explained in the following table LJ 4797 AI4 1 8 Pin Ports 1x Through 8x Daisy Chain Port 8 1 Input Receive Data Output Transmit Data 2...

Страница 46: ...A Provides capability to integrate PCI compatible systems using twisted pair AUI or ThinWire cables to 10 Mb s Ethernet networks EtherWORKS 3Turbo Adapter DE204 DE205 Provides capability to integrate...

Страница 47: ...g Information To order these products contact an Authorized Digital Distributor or Digital sales representative For more information call 800 457 8211 in the U S and Canada 508 692 2562 in other locat...

Страница 48: ...the network must first obtain exclusive access to the entire collision domain that is attached media segment before transmitting data Therefore whenever two or more stations attempt to transmit at th...

Страница 49: ...oning the network into smaller segments with bridges and routers However the delay required by bridges and routers for processing each packet may actually slow down communications at the work group le...

Страница 50: ...he maximum length of cable for a point to point connection is 100 meters bus topology A network topological arrangement where only one path exists between any two nodes and data transmitted by any nod...

Страница 51: ...ology and coaxial cable The successor IEEE 802 3 standard provides for integration into the OSI model and extends the physical layer and media with repeaters and implementations that operate on fiber...

Страница 52: ...nterconnected computers and support devices screened twisted pair ScTP A 100 ohm screened twisted pair cable unshielded twisted pair UTP Cable composed of two insulated wires twisted together to reduc...

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