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SEHI USER’S GUIDE

5-1

CHAPTER 5

TROUBLESHOOTING

This chapter contains instructions for using LANVIEW LEDs to
troubleshoot physical layer network problems. It also describes how to
reset the SEHI and how to reset the NVRAM switch.

5.1

INSTALLATION CHECK-OUT

After connecting the SEHI to the network, verify that packets pass
between all Ethernet devices connected to the SEHI and any other devices
connected to the network. If there is a problem with any of the attached
devices, check the link as follows:

1. Check that the LNK LED, if applicable, for the port is on. If the LED

is not on:

a.

Check that the 10BASE-T device at the other end of the twisted
pair segment is powered up.

b. Verify that the connector on the twisted pair segment has the

proper pinouts. Refer to Chapter 2 for the pin assignments for
twisted pair connectors.

For EPIM-F1/EPIM-F2 check that the TX and RX fibers are
properly connected.

c.

Check the cable for continuity. Several tools are available for this
test, depending on the media used.

d. Check that the twisted pair segments meet cable specifications for

dB loss as described in Chapter 2.

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Summary of Contents for SEHI-22

Page 1: ...SEHI 22 AND SEHI 24 10BASE T INTELLIGENT STACKABLE HUBS USER S GUIDE CABLETRON SYSTEMS P O Box 5005 Rochester NH 03866 5005 ...

Page 2: ...America Order Number 9031490 August 1995 SPECTRUM LANVIEW and Remote LANVIEW are registered trademarks and EPIM EPIM A EPIM F1 EPIM F2 EPIM F3 EPIM T EPIM X FOT F FOT F3 HubSTACK MicroMMAC SEH SEHI and TMS 3 are trademarks of Cabletron Systems Inc i960 is a registered trademark of Intel Corporation CHAMP is a trademark of AMP Inc CompuServe is a registered trademark of CompuServe Inc DEC VT200 VT3...

Page 3: ...G Changes or modifications made to this device which are not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment DOC NOTICE This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications Le présent app...

Page 4: ...ER OF LIABILITY IF YOU DO NOT AGREE TO THE TERMS OF THIS AGREEMENT PROMPTLY RETURN THE UNUSED PRODUCT TO THE PLACE OF PURCHASE FOR A FULL REFUND CABLETRON SOFTWARE PROGRAM LICENSE 1 LICENSE You have the right to use only the one 1 copy of the Program provided in this package subject to the terms and conditions of this License Agreement You may not copy reproduce or transmit any part of the Program...

Page 5: ...T EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES OR ON THE DURATION OR LIMITATION OF IMPLIED WARRANTIES IN SOME INSTANCES THE ABOVE LIMITATIONS AND EXCLUSIONS MAY NOT APPLY TO YOU UNITED STATES GOVERNMENT RESTRICTED RIGHTS The enclosed product a was developed sol...

Page 6: ...NSTALLATION 3 1 UNPACKING THE SEHI 3 1 3 2 PRE INSTALLATION CHECKOUT 3 2 3 3 INSTALLING THE SEHI 3 2 3 3 1 Tabletop or Shelf Installation 3 3 3 3 2 Rackmount Installation Requirements 3 4 3 3 3 Attaching the Strain Relief Bracket 3 5 3 3 4 Rackmounting the SEHI 3 6 3 3 5 Stacking the SEHI 3 7 3 4 CONNECTING THE SEHI TO THE POWER SOURCE 3 9 3 5 ADDING REPLACING EPIMs 3 10 CHAPTER 4 CONNECTING TO TH...

Page 7: ...NAGEMENT 6 5 6 3 USING THE LOCAL MANAGEMENT SCREENS 6 7 6 3 1 The Community Name Table Screen 6 7 6 3 2 The Configuration Screen 6 10 6 3 3 The Trap Table Screen 6 15 6 3 4 The SNMP Tools Screen 6 17 6 3 5 The Device Statistics Screen 6 22 APPENDIX A EPIM INFORMATION A 1 EPIM SPECIFICATIONS A 1 A 1 1 EPIM T A 1 A 1 2 EPIM F1 and EPIM F2 A 2 A 1 3 EPIM F3 A 3 A 1 4 EPIM C A 5 A 1 5 EPIM A and EPIM ...

Page 8: ... IEEE 802 3 type data communications networks and their physical layer components is helpful when installing the SEHI HubSTACK 10BASE T HUB WITH LANVIEW SEHI 22 1491_1 EPIM 1 EPIM 2 HubSTACK 10BASE T HUB WITH LANVIEW SEHI 24 HubSTACK 10BASE T HUB WITH LANVIEW SEHI 24 EPIM 1 HubSTACK 10BASE T HUB WITH LANVIEW SEHI 22 SEH INTERCONNECT OUT SEH INTERCONNECT OUT PWR CPU CLN E1 E2 RCV LNK RCV LNK 24 22 ...

Page 9: ...twork problems Chapter 6 Local Management describes how to use SEHI Local Management screens and the available commands Appendix A EPIM Information provides specifications cabling information and switch settings for the Ethernet Port Interface Modules Appendix B Image File Download Using OIDs provides instructions for setting up a tftp server and downloading image files to the SEHI by setting spec...

Page 10: ...collisions The SEHI automatically partitions problem segments and reconnects repaired segments to the network This feature minimizes the impact on network operation resulting from a problem on one segment by isolating the problem segment Only devices on the problem segment are affected When the problem is solved the SEHI automatically reconnects the isolated segment to the network Polarity Detecti...

Page 11: ...ndividual device or individual port Access Local Management by attaching a DEC VT320 terminal or a PC using VT320 emulation software to the SEHI RJ45 COM port 1 5 STACKABLE CAPABILITIES The SEHI intelligent hub is designed to manage the Cabletron series of SEH non intelligent hubs The SEHI serves as the logical top of the stack It manages all SEH hubs in the stack providing full packet and error s...

Page 12: ...pliant Network Management Packages 1 7 OPTIONAL FEATURES The following features are not included with the SEHI but can be purchased separately from Cabletron Systems Ethernet Port Interface Modules EPIMs EPIMs enable the expansion of your network through a variety of media Cabletron Systems offers the EPIMs shown in Table 1 1 Table 1 1 EPIMs EPIM Media Type Connector EPIM A AUI DB15 Female EPIM C ...

Page 13: ...uit board directly after the part number as shown in Figure 1 2 Figure 1 2 EPIM Board Revision Number Table 1 2 EPIM Board Revision Requirements EPIM EPIM Board Revision EPIM A Not Applicable EPIM C 05 or greater EPIM T 04 or greater EPIM X 02 or greater EPIM F1 05 or greater EPIM F2 05 or greater EPIM F3 02 or greater CABLETRON SYSTEMS INC PN 9000474 04 EPIM Board Revision EPIM T 1490_2 ...

Page 14: ...nt terminal The console cable is not included with the SEHI but is included in the same accessory package as the rackmount kit listed above The part number for the accessory kit is SEHI ACCY KIT See Chapter 6 Local Management for details on setting up accessing and managing the SEHI through local management 1 8 RELATED MANUALS Use the Cabletron Systems SEH 22 and SEH 24 10BASE T User s Guide to su...

Page 15: ...g For information concerning EPIMs refer to Appendix A The rear panel Interconnect Bus port supports Cabletron Systems HubSTACK Interconnect cables for stackable applications Take care in planning and preparing the network cabling and connections The quality of the connections and the length of cables are critical factors in determining the reliability of the network The following sections describ...

Page 16: ... a 10BASE T link is 11 5 dB at all frequencies between 5 0 and 10 MHz This includes the attenuation of the cables connectors patch panels and reflection losses due to impedance mismatches in the link segment Impedance Cabletron Systems 10BASE T Twisted Pair products work on twisted pair cable with 75 to 165 ohms impedance Unshielded twisted pair cables typically have an impedance of between 85 to ...

Page 17: ...oise is caused by either crosstalk or externally induced impulses Impulse noise may cause data errors if the impulses occur at very specific times during data transmission Generally the user need not be concerned about noise If noise related data errors are suspected it may be necessary to either reroute the cable or eliminate the source of the impulse noise Temperature Multi pair PVC 24 AWG wires...

Page 18: ...orts access to a Local Management Console The Console port supports a Digital Equipment Corporation VT320 terminal or PC emulation of the VT320 terminal Figure 2 2 shows the pinouts for the RJ45 COM port Figure 2 2 COM Port Pinouts 1 2 3 4 5 6 7 8 1 Receive 5 Not Used 2 Receive 6 Transmit 3 Transmit 7 Not Used 4 Not Used 8 Not Used 5X 3X 1X 1490_3 1 Transmit Data 2 Data Carrier Detect 3 Data Set R...

Page 19: ...ed when it is connected to a repeater or to an Ethernet Version 1 0 device In addition some Version 2 0 equipment does not support the SQE test Devices that do not support the SQE test interpret the SQE test pulse as a collision 2 5 OPERATING SPECIFICATIONS The operating specifications for the SEHI are described in this section Cabletron Systems reserves the right to change these specifications at...

Page 20: ... Delay Times JAM Twisted Pair to EPIM A 960 ns Preamble Input Minimum of 40 bits required Output 64 bits minimum last 2 bits are 1 1 JAM Output Collisions are propagated through the network using the JAM signal of an alternating pattern of 1 s and 0 s in accordance with 802 3 specifications for a repeater unit Fragment Extension Packet fragments are extended to a minimum of 96 bits using the JAM 1...

Page 21: ...irements The power supply has two outputs of 5 Vdc and 12 Vdc The maximum output power is 40 W and the minimum efficiency is 65 under all conditions of line at full load The minimum and maximum load current from each output is shown below Environmental Requirements Operating Temperature 5 to 50 C 41 to 122 F Non operating Temperature 30 to 90 C 22 to 194 F Operating Humidity 5 to 95 non condensing...

Page 22: ...ts the EMC requirements of EN 50082 1 including IEC 801 2 ESD levels 1 through 4 IEC 801 3 Radiated Susceptibility levels 1 through 4 and IEC 801 4 EFT B levels 1 through 4 Physical Dimensions H x W x D 2 8 x 17 0 x 8 5 7 2 cm x 43 6 cm x 21 6 cm Weight 7 lb 3 15 kg Predicted MTBF SEHI 22 24 651 695 hours It is the responsibility of the person who sells the system to which the SEHI will be a part ...

Page 23: ...terial covering the SEHI in the shipping box 2 Carefully remove the SEHI from the shipping box and set it aside to prevent damage 3 Visually inspect the SEHI If there are any signs of damage contact Cabletron Systems Technical Support immediately Read the SEHI Release Notes included in the shipping box Failure to follow installation instructions may result in an electrical shock hazard Cabletron S...

Page 24: ...n Leaving the switch in the UP position results in user installed parameters such as IP address and Community Names being cleared from NVRAM whenever the SEHI loses power and or is reset See Chapter 5 Section 5 4 for detailed instructions on setting the NVRAM switch Figure 3 1 NVRAM Switch Location 3 3 INSTALLING THE SEHI The SEHI may be installed on a tabletop or shelf or in a 19 inch rack and co...

Page 25: ...ation the shelf must be able to support 30 pounds of static weight for each device in the stack A temperature of between 5 C 41 F and 50 C 122 F must be maintained at the installation site with fluctuations of less than 10 C per hour For a tabletop or shelf installation locate the SEHI within seven feet of its power source and with an unrestricted free surface area as shown in Figure 3 2 Figure 3 ...

Page 26: ...ing the strain relief bracket Attaching the rackmount brackets Installing the SEHI in a 19 inch rack Interconnecting SEH units when applicable Tools Required Phillips Screwdriver Materials Required The following parts are included in the SEHI ACCY KIT accessory kit Use Figure 3 3 to determine the correct brackets to use for this application Strain relief bracket Left and right rackmount brackets 8...

Page 27: ... four 8 32 x 3 8 inch screws from the accessory kit included with the SEHI 2 Attach the strain relief bracket to the bottom of the SEHI Figure 3 3 Figure 3 4 Attaching the Strain Relief Rack Mounting Brackets 2 1491_08 Strain Relief Bracket Do not use screws other than those included with the SEHI accessory kit Use of longer screws may damage the unit or cause electrical shock HubSTACK 10BASE T HU...

Page 28: ...ckets to the bottom of the SEHI as shown in Figure 3 5 Figure 3 5 Installing the Rack Mount Brackets 3 With the mounting brackets installed position the SEHI between the vertical frame members of the 19 inch rack and fasten it securely with mounting screws as shown in Figure 3 6 Do not remove the cover from the SEHI Do not use screws other than the four 8 32 x 1 4 screws included with the SEHI acc...

Page 29: ...erconnect cables Table 3 1 describes each cable To stack the SEHI together with an SEH non intelligent hub 1 Attach the SEHI HubSTACK Interconnect cable to the OUT port on the rear panel of the SEHI as shown in Figure 3 7 2 Attach the other end of the SEHI HubSTACK Interconnect cable to the IN port on the rear panel of the SEH Table 3 1 HubSTACK Interconnect Cables Part Number Description Applicat...

Page 30: ...onnecting the other end attached to the hub disconnect the cable from the OUT port as shown in Figure 3 8 to ensure that the HubSTACK Interconnect cable is terminated properly SEH HubSTACK Interconnect Cables REAR VIEW SEHI Managing 4 SEH Non Intelligent Hubs SEHI HubSTACK Interconnect Cable 1490_10 HubSTACK 10BASE T HUB WITH LANVIEW SEH 24 OUT IN SEH INTERCONNECT HubSTACK 10BASE T HUB WITH LANVIE...

Page 31: ...ng that the SEHI is receiving power After the SEHI runs a self test the CPU LED blinks green indicating normal operation If the LED remains red the processor is faulty contact Cabletron Systems Technical Support SEH INTERCONNECT Disconnect SEH and SEHI Interconnect Cables at the OUT Port HubSTACK 10BASE T HUB WITH LANVIEW SEHI 24 HubSTACK 10BASE T HUB WITH LANVIEW SEH 24 OUT IN HubSTACK 10BASE T H...

Page 32: ...rify proper operation To install an EPIM 1 Remove the coverplate or the EPIM whichever applies 2 Slide the new EPIM into place making sure that the connectors on the rear of the EPIM align correctly and firmly with the connector inside the SEHI Refer to Figure 3 9 3 Install the mounting screw Figure 3 9 Installing an EPIM Observe all static precautions while handling EPIMs CAUTION When removing an...

Page 33: ...cting the SEHI to a network Network Ports SEHI 22 24 4 1 1 EPIM Ports 4 1 2 4 1 4 Prior to connecting the network cabling check the connectors for the proper pinouts as shown in Chapter 2 4 1 1 Connecting to Network Ports SEHI 22 and SEHI 24 Attach unshielded twisted pair segments to the RJ45 Network Ports on the front panel of the SEHI Each twisted pair port on the SEHI incorporates a Polarity De...

Page 34: ...s off perform each of the following steps until it is on a Check that the 10BASE T device at the other end of the twisted pair segment is powered up b Verify that the RJ45 connector on the twisted pair segment has the proper pinouts Check the cable for continuity c Check that the twisted pair connection meets dB loss and cable specifications outlined in Chapter 2 If a link is not established conta...

Page 35: ...nnect an EPIM T to a Twisted Pair Segment 1 Connect the twisted pair segment to the module by inserting the RJ45 connector on the twisted pair segment into the RJ45 port on the module See Figure 4 2 2 Check that the EPIM s LNK LED is on If the LED is off perform each of the following steps until it is on a Check that the 10BASE T device at the other end of the twisted pair segment is powered up b ...

Page 36: ... EPIM F2 F3 remember that ST connectors attach to ST ports much like BNC connectors attach to BNC ports Insert the connector into the port with the alignment key on the connector inserted into the alignment slot on the port Turn the connector to lock it down The physical communication link consists of two strands of fiber optic cabling the Transmit TX and the Receive RX The Transmit strand from th...

Page 37: ...ive port 6 Check that the EPIM s LNK LED is on If the LED is off perform the following steps until it is on a Check that the power is on for the device at the end of the link b Verify that the fiber strands are properly crossed over between the applicable port on the module and the fiber optic device at the other end of the fiber optic link segment c Verify that the fiber connection meets the dB l...

Page 38: ...R 4 CONNECTING TO THE NETWORK 4 6 SEHI USER S GUIDE Figure 4 3 The EPIM F1 EPIM F2 and EPIM F3 SMA 905 Connectors SMA 906 Connectors w Half Alignment Sleeves ST Connectors ST Connectors F1 F2 F1 F2 F3 1490_15 ...

Page 39: ...or externally terminated 2 If the Internal Termination switch is in the ON position connect the thin net segment directly to the BNC port as shown in Figure 4 4 3 If the Internal Termination switch is in the OFF position a Attach a BNC tee connector to the BNC port on the module b Attach the thin net segment to one of the female connectors on the tee connector c Attach another thin coax segment or...

Page 40: ...work in step 1 Attach thin net segment directly to BNC connector when internal termination switch is set to on When internal termination switch is set to off Connect BNC tee connector to port Attach a terminator or terminated thin net segment to one female connector of tee connector Connect a terminated thin net segment to other female connector of tee connector 1490_16 Ensure that the Signal Qual...

Page 41: ...tron Systems Technical Support 6 If the PWR LED is on with the AUI cable disconnected continue with the following checks a Check theAUI connections for proper pinouts The pinouts for the transceiver connection are listed in Chapter 2 b Check the cable for continuity c Reconnect the AUI cable to the SEHI and the device If the LED is still not on after reconnecting the segment contact Cabletron Syst...

Page 42: ...e port located on the EPIM X Figure 4 6 and connect the other end to the intended node Figure 4 6 The EPIM X The Signal Quality Error SQE switch remains in the OFF position for most network connections However some Data Terminal Equipment DTE requires SQE Refer to a DTE manual for SQE requirement information CAUTION If the SQE light remains on even though the SQE switch is in the OFF position cont...

Page 43: ...etwork into service test the installation thoroughly making sure that all stations can be addressed and that the SEHI and all stations are indicating normal operation Ensure that the networking software is configured properly to match the installed network If there are any errors or abnormal operation proceed to Chapter 5 Troubleshooting ...

Page 44: ...of the attached devices check the link as follows 1 Check that the LNK LED if applicable for the port is on If the LED is not on a Check that the 10BASE T device at the other end of the twisted pair segment is powered up b Verify that the connector on the twisted pair segment has the proper pinouts Refer to Chapter 2 for the pin assignments for twisted pair connectors For EPIM F1 EPIM F2 check tha...

Page 45: ...ented until a good packet is transmitted received without collisions If the LNK LED is still not on contact Cabletron Systems Technical Support 5 2 USING LANVIEW The SEHI incorporates the Cabletron Systems LANVIEW Status Monitoring and Diagnostics System LANVIEW LEDs help diagnose problems such as power failure or cable fault The SEHI includes the following LANVIEW LEDs PWR for power status CPU fo...

Page 46: ...up After the boot is complete the LED blinks green A blinking green LED indicates normal operation A red LED indicates a faulty processor LED Name PWR Power CPU Central Processing Unit CLN Collision RCV Receive LNK Link LED Color Off Green Solid Off Green Flashing Green Blinking Red Solid Red Yellow Flashing Off Green Off Definition No power Power CPU in BOOT process CPU initializing CPU functioni...

Page 47: ...ssociated port and the device at the other end of the segment The LNK LED remains on as long as a link is maintained Each SEHI Network Port ports 1 12 on the SEHI 22 or ports 1 24 on the SEHI 24 has a corresponding LNK LED 5 3 USING THE RESET BUTTON The SEHI incorporates a recessed Reset button See Figure 5 1 This Reset button initializes the SEHI processor This button does NOT initialize Non Vola...

Page 48: ...ch located on the front panel 3 Wait until the unit boots approximately 12 seconds 4 Return the NVRAM switch to the DOWN position Figure 5 2 NVRAM Switch Location To prevent the possibility of electrical shock do not remove the chassis cover to access the NVRAM switch and use only a non metallic tool when moving the NVRAM switch Failure to return the NVRAM switch to the DOWN position will result i...

Page 49: ...the SEHI through the community names established in the Community Name Table Designate which Network Management Workstations receive trap messages from the device Navigate through the Management Information Base MIB and manage the objects within it from a remote location Given the appropriate security level the MIB is accessible from the SEHI through SNMP Tools Local Management also allows the use...

Page 50: ...rt number SEHI ACCY KIT this accessory kit also includes rackmount hardware The SEHI ACCY KIT package provides an RJ45 Cable Kit that includes the following UTP console cable with RJ45 connectors on each end Adapters for DB9 or DB25 connections Instruction Sheet The following sections explain how to attach the console cable and set up the management terminal Refer to the RJ45 Cable Kit Instruction...

Page 51: ...Table 6 1 lists the setup parameters for the local management terminal If the terminal is a Digital Equipment Corporation VT320 terminal press F3 to access the Setup Directory If the local management terminal uses terminal emulation of the VT320 refer to the equipment user manual for setup procedures Management Terminal Console Cable COM RJ45 Port COM Port EPIM 1 EPIM 2 HubSTACK 10BASE T HUB WITH ...

Page 52: ... 7 Bit Control Cursor Keys Normal Cursor Keys Communications Setup Transmit Transmit 9600 Receive Receive Transmit XOFF any option Bits Parity 8 Bits No Parity Stop Bit 1 Stop Bit Local Echo No Local Echo Port DEC 423 Data Leads Only Transmit any option Auto Answerback No Auto Answerback Keyboard Setup Auto Repeat any option Keyclick any option Margin Bell Margin Bell Warning Bell Warning Bell Aut...

Page 53: ...er User access is public or the Return key Cabletron Systems Incorporated 35 Industrial Way P O Box 5005 Rochester NH 03867 0505 U S A 603 332 9400 SEHI LOCAL MANAGEMENT Cabletron SEHI Revision X XX XX c Copyright Cabletron Systems Inc 1993 EnterUser Password SEHI F W Version X XX XX Boot Prom Version X XX XX SEHI Board Version X X 1490_21 The password is one of the community names specified in th...

Page 54: ... Selection screen shown in Figure 6 3 appears Figure 6 3 Feature Selection Screen If the terminal keyboard is not used for 15 minutes the Local Management session ends and the screen defaults to the Password screen NOTE Cabletron Systems Incorporated P O Box 5005 Rochester NH 03867 0505 U S A 603 332 9400 FEATURE SELECTION SEHI LOCAL MANAGEMENT F6 COMMUNITY NAME TABLE F7 IPADDRESS ASSIGNMENT F8 CO...

Page 55: ...en appears To exit your Local Management session use the arrow keys to highlight the EXIT LIM SERVICE command then press Return 6 3 1 The Community Name Table Screen To access the Community Name Table screen from the Feature Selection screen use the arrow keys to highlight the Community Name Table option then press Return or F6 The Community Name Table screen shown in Figure 6 4 appears Figure 6 4...

Page 56: ...s the user defined name through which a user can access Local Management for the SEHI Any community name assigned here acts as a password to Local Management Access Indicates the access status accorded each community name Possible conditions are Basic Read This allows read only access to Local Management but excludes read privileges to the Component Trap screen Read Only This allows read only acce...

Page 57: ... level 2 Enter the community name up to 32 characters in length into the field 3 Press the Return key 4 Repeat steps 1 3 for editing any of the other community names 5 Use the arrow keys to highlight the SAVE command at the bottom of the screen then press the Return key or F6 The SAVED OK message appears indicating that the edits have been saved to memory Please note that the first time a user att...

Page 58: ...the stack This option overrides the Port Disable setting in the Statistics screen The following sections explain each field on the Configuration screen and instructions on how to change them I F Gives the number of the interface corresponding to the channels over which packets with that IP Address are passing On the SEHI this value is always 1 Cabletron SEHI Revision X XX XX CONFIGURATION SEHI LOC...

Page 59: ...Address Displays the physical address associated with the interface Default Gateway Displays the default gateway for the SEHI This field is not defined until an appropriate value is entered The default gateway identifies the default gateway device that will forward packets to other IP subnetworks Serial Port Application Displays the port s application setting as CONSOLE Baud Rate Displays the Baud...

Page 60: ...e Return key or F6 The SAVED OK message appears indicating that the changes have been saved to memory Setting the Subnet Mask The subnet mask defines how the SEHI treats SNMP Trap IP destination addresses in its Trap Table Set the subnet mask when workstations in the Trap Table reside on a different subnet i e across a gateway or router and these workstations are to receive SNMP traps Use the subn...

Page 61: ...through which the SEHI will be forwarding IP packets To set the Default Gateway 1 Use the arrow keys to highlight the Default Gateway field 2 Enter the gateway s default mask in this field The format for this entry is XXX XXX XXX XXX with values for XXX being from 0 to 255 3 Press the Return key If your entry is accepted as a valid default gateway OK appears to the right of the field 4 Use the arr...

Page 62: ...NABLED 3 The adjacent field displays Y N Enter Y to continue enabling all of the ports or N to discontinue the port enable override If Y is entered all existing ports are enabled and the message PORT ENABLED appears Exiting the Configuration Screen To exit the Configuration screen 1 Press the appropriate function key To return to the Feature Selection screen use the arrow keys to highlight the RET...

Page 63: ...p Table screen and instructions on how to change them SNMP Community Name Displays the community name included in the trap message sent to the Network Management Station with the associated IP address Traps Enables transmission of the traps to the network management station with the associated IP address Trap IP Address Indicates the IP address of the workstation to receive trap alarms from the SE...

Page 64: ...ddress field 6 Enter the IP address of the workstation that you want to send traps to in this field The format for this entry is XXX XXX XXX XXX with the value of XXX ranging from 0 to 255 and three dots or else it returns to the beginning of the field 7 Use the arrow keys to highlight the SAVE option then press the Return key or F6 The SAVED OK message appears indicating that the changes have bee...

Page 65: ...of configurable OIDs and request the OID numerically sequential to the originally requested OID Other ways to view OIDs from the SNMP Tools screen include Walking Stepping and Cycling Walk and Cycle let the user review several OIDs at a time To access the SNMP Tools screen from the Features Selection screen use the arrow keys to highlight the SNMP Tools Support option then press the Return key or ...

Page 66: ...sers with Read Write and Super User access change modifiable MIB objects using SNMP protocol Get Next Displays the OID following the current OID Walk Allows the user to scroll through a section of the MIB leaf by leaf from a user specified object identifier Leaves are the sections of the OID separated by periods When a walk is initialized the following categories for each walk entry or step are di...

Page 67: ...press the Return key or press the F6 function key GET OID F9 appears 2 Enter the OID either by Using the keyboard to enter the OID minus the OID s prepend e g if the prepend is 1 3 6 1 and 4 1 3 is entered then the OID 1 3 6 1 4 1 3 Entering an and the OID suffix e g if 4 1 3 is entered then the OID 4 1 3 This allows the user to digress and not use the prepend Pressing F9 to recall an OID already ...

Page 68: ...ng an OID To set an OID 1 Highlight SET by using the arrow keys then press the Return key or press the F7 function key SET OID F9 appears 2 Enter the OID minus the OID s prepend If the OID was previously entered pressing F9 recalls that entry The arrow keys may be used to modify the recalled OID if necessary 3 Press the Return key If there is no instance of that OID the return code will specify MI...

Page 69: ...e Return key INITIAL OID F9 appears 2 Enter the OID minus the prepend and press the Return key The screen will begin walking through the sublayers of the MIB available from the specified OID Each OID listed displays the specified OID its size its type and the data it contains 3 Press the Space Bar to stop the walk or wait for MIB WALK COMPLETED to appear on the screen Stepping Through OIDs To step...

Page 70: ...exit the SNMP Tools Screen 1 Use the arrow keys to highlight the RETURN command 2 Press the Return key The Feature Selection screen appears 6 3 5 The Device Statistics Screen This section describes the features of the Device Statistics screen The user can view error collision and traffic statistics for the stack a selected module or a selected port The user can also enable and disable ports To acc...

Page 71: ...plays the number of errors received Collisions Displays the number of collisions received SEHI LOCAL MANAGEMENT Cabletron SEHI Revision X XX XX DEVICE STATISTICS STACK TOTAL 3792125 16547 0 0 0 0 0 0 0 0 MODULE 1 67960 255 0 0 0 0 0 0 0 0 PORT 1 67960 255 0 0 0 0 0 0 0 0 ENABLE UNSEGMENTED BYTES RECEIVED FRAMES RECEIVED ERRORS RECEIVED COLLISIONS OOW COLLISIONS CRC ERRORS ALIGNMENT ERRORS RUNT PAC...

Page 72: ...at is received is the same as the data that was originally sent Alignment Errors Displays the number of errors due to misaligned packets Runt Packets Displays the number of runt packets received from the network A runt packet is less than the minimum Ethernet frame size of 64 bytes not including preamble Giant Packets Displays the number of packets received whose size exceeded 1518 data bytes not ...

Page 73: ...ts of 3 seconds with the maximum interval being 99 seconds Module This command lets the user view statistics for a selected module in the stack The SEHI is Module 1 and each SEH in the stack follows in sequential order Figure 6 9 shows each module number in the stack Figure 6 9 Module Number Sequence Port This command lets the user view port statistics for ports 1 26 of the selected module SEH MOD...

Page 74: ...command 2 Press the shift and keys or the key until the desired module or port number appears 3 Press the Return key Statistics associated with the selected Module and Port appear Using the Enable Port Command The Enable Port command lets the user enable the port selected in the Port command The user must first use the Port command to select the desired port To set the Port Enable command 1 Use th...

Page 75: ...port To set the Port Disable command 1 Use the arrow keys to highlight the Disable Port command at the bottom of the screen 2 Press the Return key The corresponding port is enabled and the Port Admin Status field is updated Exiting the Device Statistics Screen To exit the Device Statistics screen 1 Use the arrow keys to highlight the RETURN command at the bottom of the screen 2 Press the Return ke...

Page 76: ...ling It has an internal Cabletron Systems TPT T 10BASE T Twisted Pair Transceiver The slide switch on the EPIM T determines the cross over status of the cable pairs If the switch is on the X side the pairs are internally crossed over If the switch is on the side the pairs are not internally crossed over Figure A 1 shows the pinouts for the EPIM T in both positions Figure A 1 EPIM T Pinouts Positio...

Page 77: ...ower Levels after optical overshoot A Peak Power Meter must be used to correctly compare the values given above to those measured on any particular port If Power Levels are being measured with an Average Power Meter add 3 dBm to the measurement to compare the measured values to the values listed i e 30 5 dBm peak 33 5 dBm average Parameter Typical Value Worst Case Worst Case Budget Typical Budget ...

Page 78: ...EPIM F3 are listed below Figure A 3 EPIM F3 Note Transmitter Power decreases as temperatures rise and increases as temperatures fall Use the Output Power Coefficient to calculate increased or decreased power output for the operating environment For example the typical power output at 25 C is 16 4 dBm For a 4 C temperature increase multiply the typical coefficient 0 15 dBm by four and add the resul...

Page 79: ...mitter Peak Wave Length 1300 nm 1270 nm 1330 nm Spectral Width 60 nm 100 nm Rise Time 3 0 ns 2 7 ns 5 0 ns Fall Time 2 5 ns 2 2 ns 5 0 ns Duty Cycle 50 1 49 6 50 7 Bit Error Rate Better than 10 10 Receive Sensitivity dBm Less Power More Power 40 35 30 25 20 15 10 5 0 Maximum Receive Input Power Transmitter Power At 25 C into 8 3 125µm fiber Minimum Sensitivity 30 0 Typical Sensitivity 31 0 Maximum...

Page 80: ...ws the setting for the terminator switch Figure A 4 EPIM C Connector Type BNC receptacle with gold center contact for use with BNC type tee connectors and RG 58 thin net cable Grounding For safety only one end of a thin net segment should be connected to earth ground Connection to earth ground at more than one point on the segment may cause dangerous ground currents The BNC port of the Coaxial Int...

Page 81: ...h dual internal transceivers It has a DB15 male connector used to attach segments to an AUI cable Figure A 5 shows both modules Figure A 5 The EPIM A and EPIM X DB15 Pinouts Pin 1 Logic Ref 9 Collision 2 Collision 10 Transmit 3 Transmit 11 Logic Ref 4 Logic Ref 12 Receive 5 Receive 13 Power 12Vdc 6 Power Return 14 Logic Ref 7 No Connection 15 No Connection Connector Shell Protective Ground 1490_35...

Page 82: ...twork tftp server decompress the image file B 1 SETTING UP A UNIX WORKSTATION AS A TFTP SERVER Due to variations between UNIX systems and individual configurations this section provides only GUIDELINES for configuring a UNIX workstation to perform an image file download The instructions include command examples where appropriate Bold lettering in examples indicates operator entry You can also down...

Page 83: ... an image file download The instructions include command examples where appropriate Bold lettering in examples indicates operator entry Downloading an image file requires setting up your UNIX workstation as a tftp server To set up a UNIX workstation 1 If you already have a tftpboot directory confirm the tftp setup of your workstation as follows Request a process status and grep for tftp e g unix n...

Page 84: ...image file This section provides specific MIB OIDs their names and the required setting for proper image file download Refer to your specific MIB walking tool documentation for instructions on how to set MIB OID strings The Download OIDs for Cabletron products reside in Cabletron enterprise MIBs group 52 The specific OIDs necessary to perform an image file download reside in the common download gr...

Page 85: ...t OID including the name of the image file e g c tftpboot sehi hex Table B 1 OIDs and Settings Step OID Name OID Number Data Type SNMP OID Data 1 ctDLForceOnBoot 1 3 6 1 4 1 52 4 1 5 8 1 1 0 integer 1 2 ctDLCommitRAMToFlash 1 3 6 1 4 1 52 4 1 5 8 1 2 0 integer 1 3 ctDLTFTPRequestHost 1 3 6 1 4 1 52 4 1 5 8 1 4 0 IP address Enter the IP address of the tftp server 4 ctDLTFTPRequest 1 3 6 1 4 1 52 4 ...

Page 86: ...ental Requirements 2 7 EPIM Installation 3 10 EPIM Specifications 1 5 EPIM A and EPIM X A 6 EPIM C A 5 EPIM F1 F2 A 2 EPIM F3 A 3 EPIM T A 1 F Flash EEPROMs 1 3 Flash Firmware Image 3 1 H Help 1 2 related manuals 1 7 HubSTACK cable requirements 2 1 HubSTACK Interconnect Cables 1 7 I IP Address 6 12 L LANVIEW 5 2 LEDs 5 3 Local Management 6 1 accessing 6 5 community name table 6 7 configuration scr...

Page 87: ...ons SEHI 22 24 2 4 NVRAM pre installation checkout 3 2 setting 5 5 O OIDs 6 17 Operating Specifications 2 5 P Port ENABLE Override 6 14 Power Supply Requirements 2 7 R Rack Mounting accessory kit 1 7 Remote Network Management 1 5 Reset 5 4 S Safety Requirements 2 8 SEHI Features 1 3 Size dimensions 2 8 SNMP Tools Screen 6 17 Subnet Mask 6 12 T Technical Support 1 2 Transceiver Requirements 2 5 Tra...

Page 88: ... Anwendung des Geraetes geeignet und der zum Benuetzen im Lande der Anwendung anerkannt ist SPANISH El cable principal de la red eléctrica utilizado con este equipo debe tener 2 conductores y 1 toma de tierra con un mínimo de 0 75 mm2 cada uno y necesita tener un aparato de acoplamiento standard IEC en un extremo y un enchufe para el cable principal de la red eléctrica en el otro extremo lo cual s...

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