Digital Equipment DEL8X Installation And Configuration Manual Download Page 38

   A–1

Troubleshooting

Overview

The EtherWORKS Switch 8T/TX can be easily monitored through its comprehensive array
of LEDs located on the front panel. This appendix describes common problems you may
encounter and possible solutions.

Diagnosing DEL8X LEDs

The LEDs on the DEL8X assist the network manager in identifying potential problems.

The following table describes the common LED problems and possible solutions:

Symptom

Cause

Solution

Link 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 and corresponding device.

Verify that the proper cable type is
used and its length does not exceed
specified limits.

Check the NIC and cable connections
for possible defects. Replace the
defective NIC or cable.

Power LED does not light
(green) after powerup

Power supply, CPU, or
cord is defective.

Check the cord and wall outlet.
 Replace the cord if defective.
 If the power supply or CPU is
defective, see your reseller or
Authorized Digital Distributor.

Summary of Contents for DEL8X

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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_________________...

Page 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 ________________...

Page 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...

Page 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...

Page 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 __...

Page 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...

Page 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...

Page 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...

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

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Reviews: