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Table 5–4 (Cont.) Troubleshooting a DECrepeater 90FA in a DEChub 90

Backplane

If...

Then...

Do this...

If port 2 status LED does not
light, at least momentarily

Replace the repeater.

If port 2 status LED does light,
even if only momentarily

Restore all port connec-
tions on the repeater.

Check the port 0 status LED. If
the port 0 status LED is off

Check to see that the
repeater is properly
installed in the DEChub
90. Using previous
troubleshooting steps,
ensure that the port
0 status LED and
network activity LED
are functioning before
troubleshooting port 2.

If the repeater is properly
installed in the DEChub 90
and the port 2 status LED goes
off, then it is likely that port
2 is segmented. Correction of
the segmentation fault should
correct the problem.

Check the AUI connection.
Ensure that the cable is
properly connected and the
slide latches are secured.

If the AUI connection is secure

Check that the MAU is
being powered by the
repeater. (Most MAUs
have a Power OK LED.)

If the MAU is not powered by
the repeater

Replace the repeater.

If the MAU is powered by the
repeater, the fault is probably
due to an improper MAU
connection to the medium.

Ensure that the medium is
correctly attached and that
it is properly terminated.
Correction of the medium
attachment should resolve
the problem.

Troubleshooting 5–13

Содержание DECrepeater 90FA

Страница 1: ...DECrepeater 90FA Owner s Manual Order Number EK DEFAR OM B01 Revision Update Information This is a revised manual Digital Equipment Corporation Maynard Massachusetts...

Страница 2: ...ent described in this manual generates uses and may emit radio frequency energy The equipment has been type tested and found to comply with the limits for a Class A computing device pursuant to Subpar...

Страница 3: ...s 3 1 Standalone Installation 3 1 Mount the DECrepeater 90FA on a Wall 3 2 Standalone Installation Connections 3 4 Backplane Installation 3 6 4 Managing the DECrepeater 90FA Functions 4 1 Components N...

Страница 4: ...ooting Port Partitioning 5 1 DECrepeater 90FA Standalone Troubleshooting 5 3 DECrepeater 90FA Backplane Troubleshooting 5 8 A Specifications and Parts List AUI Connector Pin Assignments A 4 Parts List...

Страница 5: ...es 1 1 DECrepeater 90FA LEDs and Connectors 1 3 2 1 Segment Lengths 2 1 4 1 Ethernet Circuit Names for Systems 4 2 4 2 Summary of DECbridge 90FA Commands 4 5 4 3 DECbridge 90 Messages 4 18 5 1 DECrepe...

Страница 6: ......

Страница 7: ...erview of the DECrepeater 90FA and briefly describes the product s features 2 Describes the configuration rules and conditions of operation for the DECrepeater 90FA in a ThinWire Ethernet system or fi...

Страница 8: ...scriptions italic type indicates a variable that you supply SHOW ADDRESS In text commands are shown in all uppercase letters to differentiate them from regular text For VMS operating systems you can e...

Страница 9: ...alone configuration or as a managed repeater when installed in a DEChub 90 backplane with a DECbridge 90 series bridge When operating as a standalone unit the DECrepeater 90FA is an unmanaged repeater...

Страница 10: ...contains several indicator lights LEDs and connectors These LEDs and connectors are described in Table 1 1 and are shown in Figure 1 1 Figure 1 1 DECrepeater 90FA LEDs and Connectors PJ D120 REDUCE 45...

Страница 11: ...link is operational Off The link is not functioning Port 2 AUI status indicator monitors the status of port 2 On The port is operational Off The port is not functioning Flashing The port has been par...

Страница 12: ......

Страница 13: ...gurations are segment lengths and the number of repeaters between data terminal equipment DTE To ensure the proper operation of the IEEE 802 3 physical layer and access methodology the network size mu...

Страница 14: ...epeater sets Figure 2 1 When a network consists of five segments and four repeater sets a maximum of three of these segments may be mixing coaxial segments 2 The total of all segments up to five shall...

Страница 15: ...Segment 185 m MAU AUI DTE MAU AUI DTE DECrepeater 90FA DECrepeater 90FA 10Base FL Link Segment 100 m LJ 02372 TI0 Fiber Optic Link Segment 500 m Fiber Optic Link Segment 500 m DECrepeater 90FA Coax 1...

Страница 16: ...ECrepeater 90FL Power Supply 1 2 3 4 5 6 7 8 DEChub 90 DEChub 90 Fiber Optic Link Segment 1000 m Fiber Optic Link Segment 1000 m DECrepeater 90FA DECbridge 90FL 10BaseT Twisted Pair Link Segment 100 m...

Страница 17: ...re proper protocol operation the user must also ensure that the fiber optic cable plant is properly designed Although the IEEE 802 3 standard allows for a maximum length of 1000 meters FOIRL or 2000 m...

Страница 18: ......

Страница 19: ...n is a screwdriver The screwdriver is used to remove the back cover which covers the backplane connector and mounting assembly and to mount the repeater or the power supply on the wall Site Considerat...

Страница 20: ...e following procedure 1 Remove the cover if necessary a Insert a small screwdriver into the top mounting hole on the cover Figure 3 1 b Lift the internal latch with the screwdriver then pull the cover...

Страница 21: ...holes on the back cover to determine the placement for the mounting screws on the wall Figure 3 2 3 Secure the back cover to the wall using the mounting screws Figure 3 2 Mounting Screws LJ 00701 TI0...

Страница 22: ...ater 90FA and push straight in 2 Connect the DECrepeater 90FA to the power source For 120 240 V power outlets connect the power supply cord to the modular power supply then to the wall outlet 3 If des...

Страница 23: ...Figure 3 3 Standalone Installation 50 Ohm Terminator T Connector LJ 02374 TI0A Fiber Link To Fiber Network Installation 3 5...

Страница 24: ...plane Place the lower mounting tab located on the back of the repeater into slot 7 or 8 of the backplane Figure 3 4 3 Rock the repeater into place You will hear a click when the repeater is secured in...

Страница 25: ...Figure 3 4 Installing the DECrepeater 90FA into the DEChub 90 L J 0 2 3 7 5 T I 0 Installation 3 7...

Страница 26: ......

Страница 27: ...m the following functions Identify all repeaters in the DEChub 90 Examine port status enabled disabled properly operating or inoperative of repeater ports that share the DEChub 90 backplane with a bri...

Страница 28: ...s needed because a VMS operating system may have more than one Ethernet interface The Ethernet address is located on the front panel label on a DECbridge 90 series unit Table 4 1 lists the Ethernet ci...

Страница 29: ...ess it from a VAX 6400 computer the Ethernet circuit name is bna 0 you could use the following commands NCP NCP DEFINE NODE DBRG1 ADDRESS 13 87 HARDWARE 08 00 2B 01 23 45 SERVICE CIR BNA 0 NCP SET NOD...

Страница 30: ...ound sign If you do not define a password then the password prompt does not appear on the screen when you log in You have three attempts to enter a password if all three attempts fail then you must di...

Страница 31: ...LTER WORKGROUP protocol identifier FORWARD protocol identifier NONE DISPLAY No arguments or parameters are needed LIST BRIDGE PROTOCOL protocol number SET2 ALL BRIDGE AGE age BRIDGE FLOOD ENABLE DISAB...

Страница 32: ...nge of 1 to 200 A slot number is a single number ranging from 1 to 8 that identifies a hub slot containing a DECrepeater 90FA When two DEChub units are connected together the hub number 1 or 2 is spec...

Страница 33: ...FINE BRIDGE HUB_MANAGEMENT DISABLE commands DEFINE BRIDGE PASSWORD password string Lets you change the password string You are prompted twice for a new password The password may be a maximum of 16 cha...

Страница 34: ...ppears as follows DECbridge SET PORT 1 3 1 DISABLE Hub 1 slot 3 port 1 segment counter 0 status disabled operational SET PORT hub number slot number port number ENABLE Reverses the effect of SET PORT...

Страница 35: ...that have been moved from one port to another See Appendix B Management Details for further information about the SHOW ADDRESS command Example 1 This command displays all addresses contained within th...

Страница 36: ...epeater 90FL port numbers are 1 to 4 for the DECrepeater 90A port numbers are 1 to 3 Example 1 The expected response to a SHOW PORT command appears as follows DECbridge SHOW PORT 3 2 Hub 1 slot 3 port...

Страница 37: ...ommand to an empty slot appears as follows DECbridge SHOW REPEATER 7 No repeater responds Example 4 The response to a SHOW REPEATER command for a particular repeater appears as follows DECbridge SHOW...

Страница 38: ...1 1 port Hub 2 slot 7 port 0 segment counter 0 status operational Hub 2 slot 7 port 1 segment counter 1 status no carrier loopback Example 7 The response to a SHOW REPEATER command for hub 2 slot 7 ap...

Страница 39: ...21 08 00 2B 10 6A 31 08 00 2B 16 23 4C 08 00 2B 10 20 30 08 00 2B A6 43 17 Disk Server ThinWire Cable L J 0 2 1 5 3 T I 0 PC PC AUI Cable DECrepeater 90FL BC16M Typical Management Techniques The DECre...

Страница 40: ...management signals Note If two DEChub backplanes are being managed by one bridge the backplanes must be connected BNC to BNC using ThinWire cable part number BC16M xx where xx stands for length and a...

Страница 41: ...h the bridge from any remote node After you connect to the bridge the following prompt appears on the screen DECbridge When a bridge goes through a power cycle or is reset the bridge begins to poll re...

Страница 42: ...th collision Hub 1 slot 5 port 6 segment counter 0 status excessive length collision Hub 1 slot 5 port 7 segment counter 0 status excessive length collision Hub 1 slot 5 port 8 segment counter 0 statu...

Страница 43: ...stations on and off or if cables are connected and disconnected from the repeater during installation and reconfiguration If none of these normal causes have occurred there may be an intermittent pro...

Страница 44: ...ng as the current hub manager A fault exists in the BC16E cable or in the connections between two DEChub backplanes A fault exists in the power supply of one of the DEChub units This prevents repeater...

Страница 45: ...address number first last in range 1 200 One or more parameters provided to the SHOW ADDRESS command was invalid The valid range is 1 to 200 Unsupported by this hardware revision This occurs when you...

Страница 46: ...onnected to each port on each repeater It may be desirable to draw a network topology map Figure 4 2 Observe the LEDs on the repeater for network status Refer to Chapter 1 Table 1 1 for a description...

Страница 47: ...figuring the DECrepeater 90FA 2 Note the fault condition 3 Isolate the problem Port Partitioning Any messages or data packets received from any port by the DECrepeater 90FA are transmitted to all port...

Страница 48: ...cted to MAU MAU not functioning Coaxial cable not terminated Port not connected Table 5 2 DECrepeater 90FA Fiber Link Indicators LED Fault Correction Port 1 off Cables not connected Connect fiber cabl...

Страница 49: ...work activity LED is off There is low network activity or no network activity Ensure that network activity is present If the network activity LED still fails to light Turn the repeater off and on by u...

Страница 50: ...inWire cable is open shorted not terminated properly or the external equipment is transmitting incorrect data Ensure the operation of external equipment and cable or replace the it with a known good s...

Страница 51: ...LED should come on and the status LED should remain on If the fiber link LED does not come on Refer to the fiber link troubleshooting section of this table If the fiber link LED does come on but the p...

Страница 52: ...the repeater off and on Ensure that the port 2 status LED lights and remains on If port 2 status LED does not light and remain on Replace the repeater If port 2 status LED lights and remains on Resto...

Страница 53: ...Most MAUs have a Power OK LED If the MAU is not powered by the repeater Replace the repeater If the MAU is powered by the repeater the fault is probably due to an improper MAU connection to the mediu...

Страница 54: ...EDs on other modules If all power LEDs are off the DEChub 90 has a power distribution problem See the troubleshooting procedures in the DEChub 90 Owner s Manual If there is power to other modules ensu...

Страница 55: ...e segment and the network activity LED is off the repeater is defective Replace the repeater See the following port 0 status section The port 0 status LED is off Port 0 may be segmented or the LED may...

Страница 56: ...ort in question is good and that the external equipment is transmitting the idle signal Reconnect the same cables and external device to another repeater port If the fiber link LED for the new port co...

Страница 57: ...ED lights and the port status LED fails to light Ensure that the external equipment is operating properly Connect the transmit channel of a known good device to the receive channel of the ports in que...

Страница 58: ...nal from the repeater Use a single cable to loop the transmit channel of the port in question to the receive channel of another repeater port If the fiber link monitor LED of the receiving port lights...

Страница 59: ...the repeater is properly installed in the DEChub 90 and the port 2 status LED goes off then it is likely that port 2 is segmented Correction of the segmentation fault should correct the problem Check...

Страница 60: ......

Страница 61: ...divided into the following categories Physical dimensions Environmental operating and shipping specifications Power specifications Table A 1 lists the physical dimensions of the DECrepeater 90FA Tabl...

Страница 62: ...A minimum of 10 cm 4 in of space must be provided on both ends of the unit for adequate air flow The DECrepeater 90FA is designed to operate in an office environment or equipment room environment suc...

Страница 63: ...125 A Frequency 50 Hz to 60 Hz Power consumption 9 W Output voltage 1 5 1 Vdc Output voltage 2 12 0 Vdc DC cord length 8 ft Output current 1 8 A The DECrepeater 90FA features either a self contained...

Страница 64: ...t A 12 DI B Data In circuit B 4 DI S Data In circuit Shield 7 CO A Control Out circuit A 15 CO B Control Out circuit B 8 CO S Control Out circuit Shield 2 CI A Control In circuit A 9 CI B Control In c...

Страница 65: ...ts the replacement parts for a DECrepeater 90FA Table A 6 Parts List Replacement Part Part Number DECrepeater 90FA DEFAR MA Fiber optic cables BN24E series Power supply 120 240 Vac H7827 AA Specificat...

Страница 66: ......

Страница 67: ...in the hub During the 60 seconds you cannot remotely manage the DECrepeater 90FA This restriction does not apply to the repeaters themselves A repeater inserted into the hub is immediately manageable...

Страница 68: ...oup is as follows Tell the repeaters to wait for a message from this station Wait as long as 90 seconds for the station to transmit a message Ask the repeaters what port the message came from If a sta...

Страница 69: ...amic Ethernet addresses are added to the table when a device first transmits on the network addresses are removed when a device does not retransmit for a user specified period from 1 to 32767 seconds...

Страница 70: ......

Страница 71: ...t System Planning and Configuration Guide EK DECSY CG Ordering Information Customers may order documents by phone or mail Continental USA and Puerto Rico Call 1 800 258 1710 or send mail to Digital Eq...

Страница 72: ...Digital personnel may order these documents from Digital Equipment Corporation 444 Whitney Street Northboro MA 01532 Attn Publishing and Circulation Services NR03 W3 Order Processing Section C 2 Rela...

Страница 73: ...number of repeaters 2 1 segment length 2 1 Connections backplane 3 6 to 3 7 power supply 3 4 standalone 3 4 to 3 5 ThinWire 3 4 Connector AUI 1 3 backplane 1 3 fiber optic receive cable 1 3 fiber opti...

Страница 74: ...1 ThinWire compliant 1 1 Indicators AUI status 1 3 DC OK 1 3 fiber link status 1 3 network activity 1 3 port 0 status 1 3 Indicators cont d port 1 status 1 3 Installation backplane 3 6 to 3 7 environm...

Страница 75: ...5 1 Power supply auto ranging 1 1 connector 1 3 output voltage A 3 120 Vac 1 1 240 Vac 1 1 R Repeaters disabling ports 4 8 port numbers 4 10 show command 4 10 slot numbers 4 10 S Standalone installat...

Страница 76: ......

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