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MODIFYING A SUBNET MASK

EMM-E6 User’s Guide

7-5

7.4

MODIFYING A SUBNET MASK

The EMM-E6 automatically enters the natural Subnet Mask for any IP
address that you enter. A natural Subnet Mask is a logical separation
between network and host identifiers within the IP address. The EMM-E6
allows you to modify this mask to best suit your needs.

The Subnet Mask defines how your EMM-E6 treats SNMP trap IP
destination addresses in its Trap table (see Chapter 8, Trap Table Screen,
for additional information on traps).

Using the Subnet Mask, the EMM-E6 logically determines one of two
possible locations, either on or not on its own subnet, for each trap IP
destination address in its trap table. If the address is on its own subnet, the
EMM-E6 transmits directly to the workstation with that address. If the
address is not on its subnet, the EMM-E6 transmits to the workstation
with that IP address combined with the default gateway router MAC
address.

Use the natural Subnet Mask when:

•

workstations in the Trap table reside on a different subnet (i.e.,

across a gateway or external router), and you want these
workstations to receive SNMP traps

•

the EMM-E6 provides a natural subnet mask that fits your host/

network identifier scheme.

Modify the natural Subnet Mask when:

•

workstations in the Trap table reside on a different subnet (i.e.,

across a gateway or external router), and you want these
workstations to receive SNMP traps

Consult your Network Administrator prior to modifying any
of the natural Subnet Masks.

NOTE

CH1Book Page 5 Wednesday, March 20, 1996 7:48 AM

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Содержание Spectrum EMM-E6

Страница 1: ... PWR STBY RCV XMT CLN D C B A CPU RESET SN E P I M 1 E P I M 2 C O M 1 C O M 2 F E EPIM A PWR LNK YEL STB DSR LNK T1 FT1 TST RED SYN CTS TST SYNC BRIM WT1 BRIM A100 STY LNK XMT RCV BRIM F6 CABLETRON SYSTEMS P O Box 5005 Rochester NH 83866 5005 ...

Страница 2: ...RON SYSTEMS HAS BEEN ADVISED OF KNOWN OR SHOULD HAVE KNOWN THE POSSIBILITY OF SUCH DAMAGES Copyright July 1995 by Cabletron Systems Inc P O Box 5005 Rochester NH 03866 5005 All Rights Reserved Printed in the United States of America Part Number 9031515 July 1995 LANVIEW and SPECTRUM are registered trademarks and ESXMIM ESXMIM F2 EMM E6 EMME IRM MMAC TPMIM TPRMIM THN MIM CXRMIM FOMIM FORMIM TPXMIM ...

Страница 3: ...with the operator s manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause interference in which case the user will be required to correct the interference at his own expense WARNING Changes or modifications made to this device which are not expressly approved by the party responsible for compliance could void the user s a...

Страница 4: ...t handling CABLETRON SYSTEMS INC PROGRAM LICENSE AGREEMENT IMPORTANT Before utilizing this product carefully read this License Agreement This document is an agreement between you the end user and Cabletron Systems Inc Cabletron that sets forth your rights and obligations with respect to the Cabletron software program the Program contained in this package The Program may be contained in firmware ch...

Страница 5: ...ICTIONS You may not reverse engineer decompile or disassemble the Program 3 APPLICABLE LAW This License Agreement shall be interpreted and governed under the laws and in the state and federal courts of New Hampshire You accept the personal jurisdiction and venue of the New Hampshire courts BELLCORE TESTING INFORMATION This product has been tested by Bellcore and found to comply with the following ...

Страница 6: ...YING WRITTEN MATERIALS AND ANY ACCOMPANYING HARDWARE 2 NO LIABILITY FOR CONSEQUENTIAL DAMAGES IN NO EVENT SHALL CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING WITHOUT LIMITATION DAMAGES FOR LOSS OF BUSINESS PROFITS BUSINESS INTERRUPTION LOSS OF BUSINESS INFORMATION SPECIAL INCIDENTAL CONSEQUENTIAL OR RELIANCE DAMAGES OR OTHER LOSS ARISING OUT OF THE USE OR INABILITY TO U...

Страница 7: ...nd c in all respects is proprietary data belonging to Cabletron and or its suppliers For Department of Defense units the product is licensed with Restricted Rights as defined in the DoD Supplement to the Federal Acquisition Regulations Section 52 227 7013 c 1 ii and its successors and use duplication disclosure by the Government is subject to restrictions as set forth in subparagraph c 1 ii of the...

Страница 8: ...DGES 1 17 1 6 1 Filtering and Forwarding 1 18 1 6 2 Spanning Tree Algorithm 1 19 1 7 LOCAL MANAGEMENT FEATURES 1 20 1 8 COMMUNITY NAMES 1 21 1 9 SNMP 1 21 1 9 1 MIBs 1 22 1 10 REVIEW OF ADDRESSING 1 22 1 10 1 MAC Addresses 1 22 1 10 2 IP Addresses 1 23 1 10 3 Identifying IP Address Classes 1 25 1 10 4 Subnet Addresses 1 25 1 10 5 Subnet Masks 1 26 1 10 6 Operation of the Subnet Mask 1 30 1 10 7 De...

Страница 9: ...g Users to a Separate Segment 2 11 2 5 4 A Fault Tolerant Wiring Hierarchy 2 12 2 5 5 The EMM E6 and BRIMs 2 14 CHAPTER 3 INSTALLATION 3 1 UNPACKING THE EMM E6 3 2 3 2 SETTING MODE SWITCHES 3 3 3 3 SIMM UPGRADES 3 6 3 3 1 Locating SIMMs 3 6 3 3 2 Installing SIMMs 3 8 3 4 ADDING REPLACING EPIMs 3 9 3 5 LOCATING BRIMs 3 10 3 6 PRE INSTALLATION TEST 3 11 3 7 INSTALLING THE EMM E6 3 13 3 8 INSTALLATIO...

Страница 10: ...MUNITY NAMES 6 3 CHAPTER 7 CONFIGURATION SCREEN 7 1 ACCESSING THE CONFIGURATION SCREEN 7 1 7 2 CONFIGURATION SCREEN FIELDS 7 2 7 3 SETTING THE HOST IP ADDRESS 7 4 7 4 MODIFYING A SUBNET MASK 7 5 7 5 SETTING DEFAULT GATEWAY AND INTERFACE 7 6 7 6 CONNECTING DISCONNECTING A UPS 7 8 7 7 UNLOCKING PORTS 7 9 7 8 ENABLING PORTS 7 9 CHAPTER 8 TRAP TABLE SCREEN 8 1 ACCESSING THE TRAP TABLE SCREEN 8 1 8 2 T...

Страница 11: ... LINE INTERFACE SCREEN CHAPTER 13 MIB NAVIGATOR 13 1 MANAGING DEVICE MIBs 13 1 13 2 ACCESSING THE MIB NAVIGATOR 13 2 13 3 MIB NAVIGATOR COMMAND SET OVERVIEW 13 3 13 3 1 Conventions For MIB Navigator Commands 13 3 13 3 2 Navigation Commands 13 4 13 3 3 Built In Commands 13 11 13 3 4 Special Commands 13 16 CHAPTER 14 TROUBLESHOOTING 14 1 USING LANVIEW 14 1 14 2 TROUBLESHOOTING CHECKLIST 14 4 14 3 US...

Страница 12: ...INGLE MODE FIBER OPTIC PORT A 7 A 11 EPIM C BNC PORT A 9 A 12 EPIM A AND EPIM X AUI PORT A 10 APPENDIX B EMM E6 OIDs B 1 SPANNING TREE PROTOCOL B 1 B 2 CONFIGURING ARP REQUEST PACKETS B 2 B 3 PORT GROUP SECURITY B 3 B 4 ENABLING DISABLING SNMP TRAPS B 6 B 4 1 Enabling Network Level SNMP Traps B 6 B 4 2 Enabling Module Level SNMP Traps B 7 B 4 3 Enabling Port Level SNMP Traps B 8 B 5 ACTIVATING RMO...

Страница 13: ...nual briefly describes the EMM E6 s features provides a brief review of IP addressing and concludes with a list of related manuals Chapter 2 Requirements Configurations explains the network requirements to consider before installing the EMM E6 This chapter also includes sample configurations to demonstrate various applications for the EMM E6 Chapter 3 Installation provides instructions guidelines ...

Страница 14: ...10 Router Setup Screen Shows the Routing Services Setup Screen where the EMM E6 s optional Routing Services may be accessed Chapter 11 Device Statistics Screen illustrates the statistics provided by EMM E6 LM This chapter also describes how to enable and disable specific ports on the EMM E6 and set the statistics update frequency time Chapter 12 Command Line Interface Screen shows the Command Line...

Страница 15: ...d currently available EPIM modules Appendix B OID Descriptions supplies information detailing the Object Identifiers that may be accessed for managing the EMM E6 Following the Appendices is a brief Glossary of Terms which provides short definitions for terms related to items and concepts referred to in this manual ...

Страница 16: ... Memory and Runtime download Expandable Local DRAM Expandable Shared DRAM SNMP and RMON Support LANVIEW Diagnostic LEDs DLM Support Local Communication Ports UPS Proxy Agent Support In Band Telnet with MIB Navigator Port Locking and LANVIEWSECURE Support EMM E6 ETHERNET EPIM A PWR STBY RCV XMT CLN D C B A CPU RESET SN E P I M 1 E P I M 2 C O M 1 C O M 2 F E EPIM A PWR LNK YEL STB DSR LNK T1 FT1 TS...

Страница 17: ...ager defined parameters Six Port Ethernet Bridge The EMM E6 has six Ethernet ports Three of these ports Ethernet Channels A B and C operate within the hub One other port Ethernet Channel D provides an external connection through one of two Ethernet Port Interface Modules EPIMs located on the EMM E6 faceplate The remaining two ports Ethernet Channels E and F are externally accessible through the us...

Страница 18: ...rs The BRIM F6 uses FDDI Port Interface Modules FPIMs The FPIMs allow a media flexibility for FDDI connections by providing connector and media types meeting several ANSI standards The following FPIM types are currently available FPIM 00 MultiMode Fiber Physical Media Dependant MMF PMD compliant multimode fiber optic MIC connector FPIM 02 Twisted Pair Physical Media Dependant TP PMD complaint Unsh...

Страница 19: ...5 Port EPIM F1 Sub Miniature Assembly SMA connectors for multimode fiber optics EPIM F2 Straight Tip ST connectors for multimode fiber optics EPIM F3 Straight Tip ST connectors for single mode fiber optics EPIM C RG 58 connector for thin coaxial cabling EPIM A Female DB15 connector for AUI cabling EPIM X Male DB15 connector for AUI cabling Expandable Flash EEPROM Memory The EMM E6 incorporates 2 M...

Страница 20: ... expansion is required Expandable SDRAM The EMM E6 comes with 4 Megabytes MB of Shared Dynamic Random Access Memory SDRAM SDRAM holds packets coming onto the module temporarily while forwarding filtering and error checking decisions are made While SDRAM has been designed to facilitate future expansion at this time there are no EMM E6 functions which require or are assisted by the expansion of SDRA...

Страница 21: ...l ports on its front panel The COM 1 port allows a serial management connection to an American Power Conversion Smart Uninterruptible Power Supply UPS The COM 2 port allows you to access Local Management by locally connecting a DEC VT220 or VT320 terminal or a PC using VT emulation software In Band Telnet with MIB Navigator EMM E6 firmware supports a management tool which allows for MIB navigation...

Страница 22: ...nnels buses interconnect through the EMM E6 to provide bridging or routing and management for all MIMs in the MMAC chassis Figure 1 1 MMAC Flexible Network Bus Two types of MMACs currently support FNB architecture shunting and non shunting MMACs equipped with shunting backplanes allow modules operating on Channels B and C to continue communicating with the EMM E6 regardless of whether there is an ...

Страница 23: ...00000 or above MMAC 5FNB CC000000000 or above MMAC 8FNB CG000000000 or above MMAC M8FNB DK000000000 or above MMAC M5FNB all MMAC M3FNB all If your MMAC does not have a shunting backplane upgrade kits are available For additional information on shunting backplanes or how to upgrade your hub contact Cabletron Systems Technical Support NOTE ...

Страница 24: ... repeater MIMs i e TPMIMs FOMIMs and THN MIMs access the EMM E6 through Ethernet Channel A Additionally the TPXMIM Ethernet Port Assignment modules are able to communicate through Ethernet Channel A as well as the additional backplane channels When the EMM E6 receives a frame on Channel A it goes through the same bridging functions as any of the other channels In addition the EMM E6 incorporates I...

Страница 25: ... The RIC MIM retimes and regenerates the frame before transmitting it to all ports Using this configuration yields a path cost equivalent to only one repeater hop Since the limit of serially linked repeaters in an Ethernet network is only four using the RIC repeater offers a significant advantage By using cascading RIC MIMs it is possible to construct a much larger network than you could with stan...

Страница 26: ...r statistics for each individual RIC MIM on Channels B and or C 1 4 3 Other FNB Modules Third Party MIMs The EMM E6 recognizes the third party MIMs listed below and provides each module with support concerning the statistics on the backplane and the control of channel selection for the entire module CSMIM2 With supported connectivity for Channels A B or C in an FNB chassis MODMIM With supported co...

Страница 27: ...de board or individual port connectivity to any MMAC FNB Ethernet channel A B or C with full SNMP management including RMON All ports initially default to Channel B upon power up and require a Management Information Base MIB change to access any other channel 1 4 4 Ethernet Channel D Ethernet Channel D is provided by one of the two redundant EPIM ports on the front panel of the EMM E6 These EPIM p...

Страница 28: ...en the EMM E6 receives a frame destined for Channel D it goes through the normal bridging process for that frame and filters forwards the information accordingly 1 5 CHANNELS E AND F The EMM E6 provides interfaces for two optional Bridge Router Interface Modules BRIMs These modules provide the EMM E6 with additional connectivity for either bridging or routing functions At the same time BRIMs provi...

Страница 29: ...ed for the opposite side of the bridge to pass Bridges can also connect similar networks together such as Ethernet Token Ring and Fiber Distributed Data Interface FDDI together Note that similar networks means that the upper five layers of the OSI model see Figure 1 2 are the same but that different Data Link and Physical layers may be used by the architecture The Bridge operates at the Data Link ...

Страница 30: ...ion happens as the bridge is transmitting onto the second network the bridge is responsible for the back off and retransmission process The original sending node is not made aware of the collision It assumes the packet has been sent correctly If the bridge is unable to send the packet to its final destination the original sending station expecting some response from the device it was attempting to...

Страница 31: ...dge enters a second standby state called listening During listening the bridge monitors the network for the BPDUs of other bridges Having received packets from the networks the bridge enters the learning state continuing to block traffic as it examines the information it receives Based on bridge priorities and MAC addresses the interconnected bridges will set bridge ports to either forwarding or s...

Страница 32: ...face Control EMM E6 local and remote access by establishing Community Names Designate which Network Management Workstations receive SNMP traps from the EMM E6 Navigate through Management Information Bases MIBs Since the EMM E6 is an SNMP compliant device you can manage related SNMP MIB objects given the appropriate security level You can also manage the IETF Bridge MIB objects and many of the RMON...

Страница 33: ...levels of access are Super User Allows full management privileges Read Write Allows editing of device configuration parameters not including changing Community Names Read Only Allows reading of device parameters not including Community names Basic Read Allows reading low level device data 1 9 SNMP SNMP Simple Network Management Protocol is a protocol within the Transmission Control Protocol Intern...

Страница 34: ... in TCP IP networks Internet Protocol IP addresses and Media Access Control MAC addresses These descriptions are followed by an overview of the process of configuring addresses in a network including examples of network Classes and the creation of subnets within networks 1 10 1 MAC Addresses The MAC address is a unique 48 bit binary number associated with a specific physical connection to a networ...

Страница 35: ... Dotted Decimal Notation DDN The DDN format is XXX XXX XXX XXX Any of the four DDN values called fields can range from 1 octet 0000 0001 to 255 octet 1111 1111 An IP address is made up of two portions the Network ID and a Host ID Network IDs refer to a particular network and are assigned by the Internet Assigned Numbers Authority IANA The IANA assigns fixed numbers to one two or three of the field...

Страница 36: ... per network Range of Network IDs 128 191 1 254 host host 2 octets for the Network ID Binary translation of first octet 1000000 10111111 first bit is always 1 and second is always 0 Range for the Host ID net net 1 254 1 254 2 octets for the Host ID allows 65 534 hosts per network Range of Network IDs 192 223 1 254 1 254 host 3 octets for the Network ID Binary translation of first octet 1100000 110...

Страница 37: ...lasses tables each Class B address utilizes the first two fields for a Network ID 132 177 118 24 while the remaining two fields 132 177 118 24 are the Host ID 1 10 4 Subnet Addresses Subnet addresses are used to partition an IP network into multiple subnetworks or subnets The use of subnet addresses adds an additional layer of hierarchy to the IP addressing scheme This additional addressing layer ...

Страница 38: ...is used Any station or device which implements subnet masking needs to be configured with an address for that subnet s Default Gateway When the station or device transmits packets intended for a different subnetwork than the one it identifies itself as belonging to the transmission is also sent to the Default Gateway where the gateway or router will make the determination of where the packet is se...

Страница 39: ...e within each configured Subnet 0 0 1 1 1 1 0 0 1 1 0 1 1 1 1 1 1 0 0 0 1 0 1 0 X X X X X X X X 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 1 1 1 0 0 0 0 N N N N N N N N N N N N N N N N N N N N N N N N H S S S H H H H Subnet Logical Shows how final five bits of original remain for Host IDs Modified Subnet Mask 255 255 255 224 Masks first three bits of fourth octet Network Actual 195 191 21 X...

Страница 40: ...esses that are available from an individual octet These tables examine the Host IDs and Subnet Addresses available from the use of custom masks in both Class B and Class C IP addresses Bear in mind that Subnet Masks can only be modified for those fields which are not assigned to a site by the IANA Table 1 6 Examples of Class C Subnet Masks Decimal Mask Binary Equivalent Available Subnet Addresses ...

Страница 41: ...ents of 8 2 046 252 0 11111100 00000000 4 252 increments of 4 1 022 254 0 11111110 00000000 2 254 increments of 2 510 255 0 11111111 00000000 1 254 254 255 128 11111111 10000000 0 255 128 1 255 0 126 255 192 11111111 11000000 0 254 192 0 255 128 0 255 64 1 255 0 62 255 224 11111111 11100000 0 255 32 64 96 128 160 192 224 0 254 224 1 254 0 30 255 240 11111111 11110000 0 254 240 0 255 16 240 increme...

Страница 42: ...ult Subnet Mask for the EMM E6 when workstations in the Trap table reside on a different subnet i e across a gateway or external router and you want these workstations to receive SNMP Traps generated by the EMM E6 Caution should be exercised when configuring subnets as a poorly subnetted network can greatly increase network traffic by duplicating transmissions 1 10 7 Default Gateway The Default Ga...

Страница 43: ...subnets 6 hosts each 240 15 subnets 14 hosts each and 224 6 subnets 30 hosts each Any of these decimal masks would support the number of Host IDs to be configured Looking ahead the Network Manager realizes that adding Host IDs to a full network can involve a total reconfiguration of subnet strategies and opts for the decimal mask 240 which provides room for the configuration of 210 Host IDs After ...

Страница 44: ...ing device with a modified Subnet Mask a Default Gateway is assigned In the event that any of the custom masked devices generated an SNMP Trap for the network management station a comparison of the Subnet Mask and the Network ID indicates that the SNMP Trap should be sent to that subnet s Default Gateway to be routed to the subnet where the network management station resides The procedures for mod...

Страница 45: ...NVIEWSECURE products support both inbound data Intruder Prevention and outbound data Eavesdrop Prevention These products are identified by the words LANVIEWSECURE printed on the faceplate of the product Intruder prevention allows ports on the modules to be configured with expected MAC addresses If a port receives a packet from a station or device whose MAC address does not correspond to the one pr...

Страница 46: ...disabled Enabling the Full security function modifies the broadcast and multicast packets LANVIEWSECURE is enabled upon the locking of a channel module or port When enabled the first two addresses that are learned become the expected addresses associated with that port on any LANVIEWSECURE module If a port has never been enabled and a MAC address is added to that port then any MAC address learned ...

Страница 47: ...4 RELATED MANUALS Use the following manuals to supplement the procedures and other technical data provided in this manual This manual references procedures in these manuals where appropriate but does not repeat them Cabletron Systems MMAC Overview and Setup Guide Cabletron Systems Bridge Router Interface Module Guide s Cabletron Systems Repeater Interface Controller Media Interface Modules TPRMIM ...

Страница 48: ...bling and connections for your network The quality of the connections the length of cables and other conditions of the installation play critical roles in determining the reliability of your network Refer to sections below that apply to your specific network configuration Your network installation must meet the conditions guidelines specifications and requirements included in this chapter to ensur...

Страница 49: ...nsertion loss must not exceed 11 5 dB 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 75Ω to 165Ω impedance Unshielded twisted pair cables typically have an impedance of between 85Ω and 110Ω You can also use shielded tw...

Страница 50: ...es crosstalk 10BASE T transceiver design alleviates concerns about crosstalk providing the cable meets all other requirements Noise Crosstalk or externally induced impulses are causes of noise Impulse noise may cause data errors if the impulses occur at very specific times during data transmission Generally noise is not a concern If you suspect noise related data errors you may need to reroute the...

Страница 51: ...or less for a 100 140 µm fiber cable segment Budget and Propagation Delay When you determine the maximum fiber optic cable length to incorporate fiber runs into your network you must calculate and consider the fiber optic budget a total loss of 10 0 dB or less is permissible between stations and total network propagation delay To determine the fiber optic budget combine the optical loss due to the...

Страница 52: ... you determine the maximum fiber optic cable length to incorporate fiber runs into your network you must calculate and consider the fiber optic budget a total loss of 10 0 dB or less is permissible between stations and total network propagation delay To determine the fiber optic budget combine the optical loss due to the fiber optic cable in line splices and fiber optic connectors Typical loss for...

Страница 53: ...se an excessive number of barrel connectors within the cable segment e g finished wall plates with BNC feed throughs you may need to reduce the number of host connections For special network design contact Cabletron Systems Technical Support Grounding For safety ground only one end of a thin net segment Do NOT connect EPIM BNC ports to earth ground 2 2 TRANSCEIVER REQUIREMENTS When you connect an ...

Страница 54: ...rts ST type connectors TPRMIM 20 TPRMIM 22 twisted pair repeater MIM RJ45 connectors TPRMIM 20 has nine TPRMIM 22 has twenty one one EPIM TPRMIM 33 TPRMIM 36 twisted pair repeater MIM 50 pin RJ71 connectors TPRMIM 33 has one TPRMIM 36 has two each RJ71 connector provides twelve 10BASE T twisted pair ports twelve total for TPRMIM 33 twenty four total for TPRMIM 36 each MIM has one EPIM the TPRMIM 3...

Страница 55: ... 20 TPXMIM 22 twisted pair port and bank assignment repeater MIM RJ45 connectors TPXMIM 20 has nine TPXMIM 22 has twenty one one EPIM TPXMIM 32 TPXMIM 36 twisted pair port and bank assignment repeater MIM RJ71 connectors TPXMIM 32 has one TPXMIM 36 has two one EPIM Figure 2 1 Sample Repeater MIMs ...

Страница 56: ...les for configuring networks with the EMM E6 These examples illustrate the flexibility and advantages to using the EMM E6 and RIC MIM technology 2 5 1 Three networks with a single MMAC FNB 2 5 2 The EMM E6 as a multi port router 2 5 3 Adding users to an existing network 2 5 4 A fault tolerant wiring scheme 2 5 5 The EMM E6 and BRIMs ...

Страница 57: ...ion Figure 2 2 Single MMAC FNB Configuration 2 5 2 The EMM E6 as a Multiport Router An EMM E6 routing image allows you to set up the module as a multi port router For information on how to upgrade the EMM E6 to perform routing functions and how to configure the EMM E6 as a multi port router refer to Cabletron Systems Router Services Manual or contact Cabletron Systems Technical Support TPRMIM 33 C...

Страница 58: ... 24 48 Users 48 Users IRM3 TPMIM 24 TPMIM 24 two additional 24 port non RIC MIMs an additional MMAC an additional IRM2 two additional 24 port MIMs an external bridge IRM3 TPMIM 24 TPMIM 24 48 Users 48 Users IRM3 TPMIM 24 TPMIM 24 48 Users Bridge Bridge IRM3 TPMIM 24 TPMIM 24 an MMAC FNB an EMM E6 two 24 port RIC MIMs an MMAC an IRM2 two 24 port MIMs 48 Users IRM3 TPMIM 24 TPMIM 24 Another Addition...

Страница 59: ... contain an MMAC FNB with an EMM E6 MIMs and RIC MIMs operating on Ethernet channels A B and C Within each closet each Ethernet channel is separately repeated and each is dedicated to a specific set of network users for example Ethernet A contains Novell users Ethernet B contains TCP IP and NFS users and Ethernet C contains DECnet users D D C B A BRIDGE Closet 1 A B C A B C BRIDGE STAR HUB A B C B...

Страница 60: ... backup paths in a standby condition If any repeater link fails or if an active bridge path fails one or many backup bridge paths may become active replacing the failed repeater link or bridge path An additional level of redundancy is achieved by using the cable redundancy algorithm built into Cabletron s EMM E6 This feature enables you to configure redundant bridge paths with one path remaining i...

Страница 61: ...on possibilities depending on the BRIM s you use Refer to individual BRIM manuals and or Cabletron Systems Router Services documentation to better understand the capabilities of each device Figure 2 5 The EMM E6 and BRIMs TPRMIM 33 CXRMIM FORMIM 22 FORMIM 22 TPMIM 24 TPMIM 24 Channel A Channel B Channel C EMM E6 E BRIM FD2 TWR WRP RCV XMT LNK Channel D FDDI Backbone Redundant Connectivity Ethernet...

Страница 62: ...nd setting the EMM E6 mode switches adding replacing optional modules i e Single In line Memory Modules and Ethernet Port Interface Modules identifying BRIM connector locations installing the EMM E6 into a Multi Media Access Center MMAC connecting your device to a network For information on how to install an optional BRIM refer to your specific BRIM documentation NOTE ...

Страница 63: ...lly inspect the module If there are any signs of damage contact Cabletron Systems Technical Support immediately 5 Place the static grounding strap properly on your wrist before opening the non conductive bag 6 Open the non conductive bag by tearing the black and yellow tape seal 7 Perform a second visual inspection of the module Item Quantity EMM E6 1 Firmware Image 1 Grounding Strap 1 RJ45 Adapte...

Страница 64: ...e switches to ensure that they are in the correct position for normal EMM E6 operation Figure 3 1 EMM E6 Mode Switches ON 1 2 3 4 5 6 7 8 On Off Switches EMM E6 The potential for electric shock is present inside the MMAC chassis when power is applied Do not adjust switch settings when the EMM E6 is within a powered MMAC enclosure Failure to comply could result in personal injury and or equipment d...

Страница 65: ...ou to set the Console port s baud rate The OFF position sets the baud rate to 9600 The ON position sets the baud rate to 2400 Switch 6 Forced Download Changing the state of this switch i e moving the switch from one position to another clears download information from NVRAM and forces the EMM E6 to download an image file from the station acting as the EMM E6 s BOOTP server Changes to switch positi...

Страница 66: ...ging the state of this switch i e moving the switch from one position to another and executing a reset of the module resets these parameters to the factory defaults Once the EMM E6 resets you can either use the defaults or re enter your own parameters The EMM E6 stores these parameters in NVRAM when the device powers down These parameters remain in NVRAM until the switch changes state again Switch...

Страница 67: ...Figure 3 2 illustrates the EMM E6 SIMM slot locations and the direction in which to install the SIMMs For additional information on SIMMs or how to upgrade the memory in your Module contact Cabletron Systems Technical Support NOTE The LDRAM SIMM slot is shipped with an expansion SIMM located in it If you are performing an upgrade to LDRAM ensure that the upgrade SIMM is placed in the proper SIMM s...

Страница 68: ...DES EMM E6 User s Guide 3 7 Figure 3 2 SIMM Slot Locations Local Dynamic Random Access Memory LDRAM SIMM Slot FLASH Memory SIMM Slot Shared Dynamic Random Access Memory SDRAM SIMM Slot EMM E6 Direction of Install ...

Страница 69: ...tions to install your SIMM Figure 3 3 Installing a SIMM To install a SIMM 1 Insert the SIMM between the connector teeth in the SIMM slot 2 Pivot the SIMM back until it locks into the clips in the SIMM slot and the SIMM holes fit over the SIMM slot posts 2 1 SIMM Clips Connector Teeth SIMM Slot SIMM Hole SIMM Slot Post Observe all anti static precautions when handling sensitive electronic equipment...

Страница 70: ...Remove the coverplate or the EPIM whichever applies 2 Slide your new EPIM into place making sure the connectors on the rear of the module and inside the hub attach properly 3 Install the mounting screw Figure 3 4 Installing an EPIM Observe all anti static precautions when handling sensitive electronic equipment CAUTION When removing an EPIM make sure to pull the module straight out so as not to da...

Страница 71: ...onnector locations on your EMM E6 board Refer to your BRIM Guide for installation procedures and additional information The following diagram Figure 3 5 shows BRIM connector locations for the EMM E6 Figure 3 5 BRIM Connector Locations Channel F BRIM Connector Standoff BRIM F Ribbon Cable Connector Channel E BRIM Connector EMM E6 ...

Страница 72: ...MM E6 and a Media Interface Module MIM as follows 1 Install the EMM E6 and any MIM e g TPMIM THN MIM CXRMIM FORMIM etc into a non networked MMAC 2 Connect the first workstation to an EMM E6 EPIM or BRIM 3 Connect the second workstation to the MIM using the appropriate cable or transceiver 4 Assign the EMM E6 a valid IP address through Local Management 5 Designate the first workstation as a file se...

Страница 73: ... two workstations to verify the proper operation of the EMM E6 If a failure occurs refer to Chapter 14 Troubleshooting Figure 3 6 Pre Installation Test Note If using UNIX workstations a ping test verifies the EMM E6 is operating properly NOTE EMM E6 MMAC M3FNB TPT tTPRMIM 33 ...

Страница 74: ...ion Install the EMM E6 into the MMAC FNB backplane as follows 1 Remove the safety bars which protect the chassis and remove any module to be replaced or blank MMAC slot covers in accordance with the installation and removal procedures for these items 2 Holding the EMM E6 by the edges of the board align the bottom and top edges of the board with the slot guides Make sure that both the bottom and to...

Страница 75: ... chassis by tightening the knurled knobs If you do not tighten the knurled knobs vibration can cause the module to lose contact with the backplane and disrupt your network 7 Re install the MMAC chassis safety bars 6 Power up the MMAC if it isn t already ON EMM E6 Chassis Slots 1 and 2 Knurled Knobs EMM E6 MMAC M8FNB It takes several minutes for the EMM E6 to boot up While booting the EMM E6 displa...

Страница 76: ... the LEDs should be in the following conditions CPU LED flashing indicating proper EMM E6 operation STBY A B C D LEDs ON or OFF depending on the port s position in the Spanning Tree Algorithm Appropriate EPIM BRIM LEDs ON see section 3 9 Connecting to the Network to obtain the appropriate LED status for individual EPIMs refer to individual BRIM Guides ON LED lit for the active channel D EPIM If th...

Страница 77: ... Keep the server workstation stationary in the wiring closet with the EMM E6 and use the client workstation to move to each node connected to the EMM E6 See Figure 3 9 1 After the EMM E6 is installed in the MMAC connect the server workstation to either a MIM or to the EMM E6 via an EPIM or BRIM 2 Going to each node connected to the MMAC connect the client workstation and test the segment If a fail...

Страница 78: ...TALLATION CHECK OUT EMM E6 User s Guide 3 17 Figure 3 9 Installation Checkout TPT File Server Workstation MMAC M3FNB with EMM E6 and TPRMIM Office Locations Client Workstation EMM E6 MMAC M3FNB tTPRMIM 33 ...

Страница 79: ...M 1 port acts as the bridge port and the EPIM 2 port is OFF Once you have successfully powered up your EMM E6 you can add network connections The procedure for connecting Ethernet segments to a hub varies depending on the media and ports you connect Refer to the following list and perform the procedure described in the subsection s that apply to your hub EPIM T 3 9 1 EPIM X 3 9 2 EPIM F1 F2 F3 3 9...

Страница 80: ...r switch Figure 3 10 EPIM T Cross over Switch To connect 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 3 10 To establish link you must have an odd number of cross overs preferably one between 10BASE T devices of the same type i e from repeater to repeater o...

Страница 81: ...e twisted pair segment have the proper pinouts Figure 3 11 c Check the cable for continuity d Check that the twisted pair connection meets dB loss and cable specifications outlined in 10BASE T Twisted Pair Network Requirements Chapter 2 Figure 3 11 Cable Pinouts EPIM T RJ45 Port If you still cannot establish link contact Cabletron Technical Support TX TX RX RX 2 1 3 6 10BASE T Device Port TX TX 2 ...

Страница 82: ... length to the port located on the EPIM X Figure 3 12 and the other end to the intended node Figure 3 12 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 your DTE manual for SQE requirement information NOTE If the SQE light remains on even though the SQE switch is in the OFF positi...

Страница 83: ...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 a module port connects to the Receive port of a fiber optic Ethernet device at the other end of the segment i e TX of the applicable...

Страница 84: ...er optic ports on the applicable port on the module and from the ends of the connectors on each fiber strand 2 On the EMM E6 attach the fiber labeled 1 to the applicable receive port labeled RX Figure 3 13 3 On the EMM E6 attach the fiber labeled 2 to the applicable transmit port labeled TX 4 At the other end of the fiber optic cable attach the fiber labeled 1 to the transmit port of the device an...

Страница 85: ...is powered b Verify proper cross over of fiber strands 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 loss specifications outlined in Fiber Optic Network Requirements Chapter 2 If you still cannot establish link contact Cabletron Technical Support SMA 905 Connectors SMA 906 Connec...

Страница 86: ...Termination Switch is in the On position connect the thin net segment directly to the BNC port 3 If the Internal Termination switch is in the Off position a Attach a BNC T connector to the BNC port on the module b Attach the thin net segment to one 1 of the female connectors on the T connector c Attach another thin coaxial segment or a terminator to the other female connector on the T connector Fa...

Страница 87: ...BNC connector when internal termination switch is set to on When internal termination switch is set to off Connect BNC T 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 T connector ...

Страница 88: ...ormation refer to the applicable transceiver manual 3 Attach an AUI cable no longer than 50 meters in length to the transceiver you connected to the network in step 2 4 Connect the AUI cable to the AUI port located on the EPIM A See Figure 3 15 Figure 3 15 The EPIM A Ensure that the external transceiver to which you connect the EPIM A does not have the Signal Quality Error SQE or heartbeat test fu...

Страница 89: ...nsceiver PWR LED is off with the AUI cable connected a Check the AUI connections for proper pinouts Appendix A lists the pinouts for the transceiver connection b Check the cable for continuity c Reconnect the AUI cable to the EMM E6 and the device If the transceiver PWR LED remains off contact Cabletron Systems Technical Support ...

Страница 90: ...INAL The following instructions outline how to configure your console terminal to communicate with Local Management Refer to your specific terminal manual for more instructions if necessary To access Local Management for the EMM E6 you need either a VT200 or VT300 series terminal a PC emulating a VT200 or VT300 series terminal To access the Setup Directory on a VT series terminal press F3 The foll...

Страница 91: ...Keys Power Supply VT300 7 Bit Controls VT320ID or VT100ID Normal Cursor Keys UPSS DEC Supplemental Communications Setup Menu Transmit Receive XOFF Bits Parity Stop Bit Local Echo Port Transmit Auto Answerback Transmit 9600 Receive Transmit XOFF at 64 8 bits No Parity 1 Stop Bit No Local Echo DEC 423 Data Leads Only Limited Transmit No Auto Answerback Keyboard Set up Menu Keys Auto Repeat Keyclick ...

Страница 92: ...information included with the cable kit to make sure you are using the right adapter To configure the cables 1 Plug a straight through twisted pair cable e g an RS232 cable into the EMM E6 RJ45 COM 2 Port 2 Plug the other end of the RS232 cable into the adapter 3 Connect the adapter into the device cable and plug the other end of the device cable into the terminal or terminal emulator Detailed des...

Страница 93: ...r at the other end of the cable into the RJ45 to DB25 female adapter 3 Connect the DB25 adapter to the port labeled COMM on the VT terminal Figure 4 1 Connecting a VT Series Terminal 4 Turn on the terminal and access the Setup Directory Follow the directions in the previous section and set up yourVT terminal to match the configuration given in Table 4 1 5 When these parameters are set the Local Ma...

Страница 94: ...he Console port on the Cabletron module 2 Plug the RJ45 connector at the other end of the cable into the RJ45 to DB9 adapter 3 Connect the DB9 adapter to the communications port on the PC Figure 4 2 Connecting an IBM PC or Compatible 4 Turn on the PC and configure yourVT emulation package to match the configuration given in Table 4 1 5 When these parameters are set the Local Management password sc...

Страница 95: ...he adapter to the UPS 3 Set COM 1 in the LM Configuration screen to UPS Refer to Chapter 7 Configuration Screen for additional information regarding UPS connection Table 4 2 RJ45 to DB9 Adapter PC Adapter RJ45 DB9 Pin Color Pin Description 1 Blue 2 Receive 4 Red 3 Transmit 5 Green 5 Ground 2 Orange 7 Send Request 6 Yellow 8 Clear to Send Table 4 3 RJ45 to DB25 Adapter VT Series Adapter RJ45 DB25 P...

Страница 96: ...the terminal on and press the Return key The EMM E6 Password Screen Figure 5 1 appears Figure 5 1 EMM E6 Password Screen Cabletron Systems Incorporated 35 Industrial Way P O Box 5005 Rochester NH 03867 0505 U S A 603 332 9400 EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 c Copyright Cabletron Systems Inc 1994 Enter USER PASSWORD EMM E6 960 F W Version 0 00 00 Boot PROM Version 00 0...

Страница 97: ...e 5 2 Feature Selection Screen Your password is one of the community names specified in the Community Name Table Access to certain LM capabilities depends on the degree of access accorded that community name See Chapter 6 Community Names for additional information NOTE Entering 10 incorrect passwords in a row causes an access violation In such an event the EMM E6 disconnects from the network and r...

Страница 98: ...t an option and press Return or simply use the corresponding Function key The selected screen appears If you do nothing on LM for 15 minutes the Password Screen reappears At this point you must re enter the password to continue using EMM E6 Local Management ...

Страница 99: ... objects for the EMM E6 and additional Bridge Router Interface Modules BRIMs 6 1 ACCESSING THE COMMUNITY NAME TABLE To access the Community Name Table Screen 1 From the Feature Selection Screen use the arrow keys to highlight the Community Name Table option and press the Return key The Community Name Table Screen Figure 6 1 appears Figure 6 1 Community Name Table Screen EMM E6 960 LOCAL MANAGEMENT...

Страница 100: ...nding to this status has limited read only access to the EMM E6 and does not include access to security protected fields requiring a higher level of authorization read only read write or super user READ ONLY This allows for extended read only access to EMM E6 LM fields and excludes access to security protected fields of read write or super user authorization READ WRITE This allows you to read and ...

Страница 101: ...urn key 4 Repeat steps 1 3 to modify any other community names 5 Use the arrow keys to highlight the Save command at the bottom of the screen and press the Return key The message SAVED OK appears The EMM E6 saves the community names in memory and implements their access modes If you exit without saving a NOT SAVED message appears above the SAVE command If you proceed to exit without saving you los...

Страница 102: ...creen Figure 7 1 appears Figure 7 1 Configuration Screen EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 CONFIGURATION COM 1 Application UPS Baud Rate 2400 ACTIVE COM 2 Application CONSOLE Baud Rate 9600 ACTIVE Port Lock Override OVERRIDE DISABLED Port Enable Override OVERRIDE DISABLED Default Interface NONE Default Gateway NONE DEFINED SAVE IPs COMMUNITY NAMES TRAP TABLE SNMP TOOLS ...

Страница 103: ...nels E and F are external connections through optional BRIMs Refer to Chapter 1 of this User s Guide for a more complete description of channels IP Address Displays the IP address for each interface of the EMM E6 This IP address will be used for the sending and receiving of SNMP data and should be configured for the interface with a connection to the network management station If the network manag...

Страница 104: ...il you enter an appropriate value for the Default Interface COM 1 Application Displays a port application setting of OFFLINE UPS or SLIP COM 2 Application Displays a port application setting of CONSOLE Baud Rate Displays the Baud Rate setting of the device attached to the EMM E6 through that COM port The setting for COM 1 is 2400 or N A the setting for COM 2 is 9600 Port LOCK Override This command...

Страница 105: ...ing the four XXX values 3 Press the Return key The screen displays the Host IP address and changes any existing Subnet Mask to the default Subnet Mask for the IP address entered 4 Use the arrow keys to highlight the SAVE IPs command 5 Press the Return Key At the resulting prompt typing Y will cause the EMM E6 to reset and load the Host IP changes into NVRAM If you exit the Configuration Screen wit...

Страница 106: ...stination address in its trap table If the address is on its own subnet the EMM E6 transmits directly to the workstation with that address If the address is not on its subnet the EMM E6 transmits to the workstation with that IP address combined with the default gateway router MAC address Use the natural Subnet Mask when workstations in the Trap table reside on a different subnet i e across a gatew...

Страница 107: ...ic to your network 7 5 SETTING DEFAULT GATEWAY AND INTERFACE The Default Gateway is the IP address of the network connection i e gateway or another external router used in forwarding management information from the EMM E6 e g SNMP traps to a network management station The Default Interface is the channel that the EMM E6 uses to access the Default Gateway Make sure to set the Default interface to r...

Страница 108: ...valid at the top of the screen 4 Use the arrow keys to highlight the Default Gateway field 5 Enter the gateway s IP address in this field The format for this entry is XXX XXX XXX XXX with values for XXX ranging from 0 to 254 6 Press the Return key If the EMM E6 accepts your entry as a valid Default Interface it displays Previous Default Interface Marked Invalid at the top of the screen You have no...

Страница 109: ... Connect appears in the field 5 Use the arrow keys to highlight Connect 6 Press the Return key The request Y N _ appears 7 Enter Y if you want to connect a UPS or N if you do not want a UPS connection Entering a Y response connects the EMM E6 to the UPS and Active appears in the Connect field 8 Press the Return key To disable the UPS connection using EMM E6 LM 1 Use the arrow keys to highlight Act...

Страница 110: ... key The adjacent field displays UNLOCK ALL PORTS Y N 3 Enter Y to unlock all of the ports or N to discontinue the port lock override Responding with a Y unlocks all ports 4 Press the Return key 7 8 ENABLING PORTS The Port ENABLE Override function provides a fail safe recovery when you cannot enable the chassis with remote inband SNMP To use the Port ENABLE Override 1 Use the arrow keys to highlig...

Страница 111: ...atures Selection Screen use the arrow keys to highlight the Component Trap Table option 2 Press the Return key The Trap Table Screen Figure 8 1 appears Figure 8 1 Trap Table Screen EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 TRAP TABLE SAVE COMMUNITY NAMES IP TABLE SNMP TOOLS CLI RETURN F6 F7 F8 F9 F10 Traps ctron Mike Joe Randy Jerry Chris Scott CR N Y N N N N N N 132 177 118 24...

Страница 112: ...Indicates the IP address of the workstation to receive trap alarms from the EMM E6 8 3 CONFIGURING THE TRAP TABLE 1 Using the arrow keys highlight the SNMP Community Name field 2 Enter the community name that reflects the desired access level e g the community name associated with the SUPER USER access level for SNMP trap information 3 Press the Return key 4 Using the arrow keys highlight the Trap...

Страница 113: ...e Return key The message SAVED OK appears 10 Exit the screen by either pressing the appropriate Function key to go directly to the desired LM screen or by using the arrow keys to highlight the desired LM screen or the RETURN command and then pressing the Return key Using the RETURN command takes you back to the Feature Selection Screen The designated workstations if properly configured and utilizi...

Страница 114: ...ecifics about object identifiers OIDs edit configurable OIDs view OIDs sequentially from the originally requested OID 9 1 ACCESSING THE SNMP TOOLS SCREEN To access the SNMP Tools Screen 1 From the Features Selection Screen use the arrow keys to highlight the SNMP Tool Support option 2 Press the Return key The SNMP Tools Screen Figure 9 1 appears Figure 9 1 SNMP Tools Screen EMM E6 960 LOCAL MANAGE...

Страница 115: ...SNMP protocol GETNEXT Displays the next OID in the MIB tree by getting the next SNMP OID from a remote agent WALK Scrolls through the MIB leaf by leaf from a user specified object identifier Leaves are objects or instances of objects After initializing a walk you see the following categories for each entry Specified OID identifies the number tag for that OID Size gives the number of bytes required...

Страница 116: ...fault to public However some components have specific community names e g depending on what devices reside in the EMM E6 managed hub Repeater Rev 4 uses separate community names for each channel in use channelA channelB and or channelC A complete list of Super User community names also called community strings resides in the Cabletron proprietary chassis MIB The MIB group chCompName provides the n...

Страница 117: ...ING AND SETTING OIDS To get an OID 1 Highlight GET using the arrow keys 2 Press the Return key GET OID F9 appears 3 Enter an OID either by using the keyboard to enter the OID pressing F9 to recall an OID already entered and using the keyboard to modify the recalled OID as necessary The default super user password public allows you to access most MIB components To change the SNMP Tools screen COMMU...

Страница 118: ...lays MIB_NO_INSTANCE Otherwise the EMM E6 displays that OID s data type length and value To set an OID 1 Highlight SET using the arrow keys 2 Press the Return key SET OID F9 appears 3 Enter an OID 4 Press the Return key If that OID does not exist the EMM E6 displays MIB_NO_INSTANCE Otherwise the EMM E6 displays INteger String Null OId IP address Counter Gauge Timeticks OPaque DATA TYPE name If you...

Страница 119: ... for the information that you need The SNMP Tools screen provides several scroll options Walk scrolls through OIDs sequentially from the initial OID Cycle allows you to specify how many GetNext commands to cycle through for one OID Step pages through the MIB one OID at a time If you have previously entered an OID press F9 to recall that entry You can use the arrow keys to modify the recalled OID o...

Страница 120: ...specified OID its size its data type and the data value 5 Press any key to stop the walk or wait for MIB WALK COMPLETED to appear on the screen To cycle through 1 Highlight CYCLES using the arrow keys 2 Press the Return key ENTER CYCLE COUNT appears 3 Enter the number of OID cycles that you want to scroll through 4 Press the Return key ENTER CYCLE DELAY appears 5 Enter the delay that you want in s...

Страница 121: ...arrow keys 2 Press the Return key GETNEXT OID F9 appears 3 Enter the OID only the suffix is necessary 4 Press the Return key The initial OID details including its size data type and data value appear 5 Highlight STEP using the arrow keys 6 Press the Return key to page through the MIB to the next OID ...

Страница 122: ...led in the EMM E6 The user should use the Routing Services Manual to make the correct selections from the Router Setup Screen The EMM E6 User s Guide does not cover routing and all data on this window will be found in the Routing Services Manuals Figure 10 1 Router Setup Screen EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 SNMP TOOLS INITIALIZE RETURN INTEGRATED ROUTER X XX XX ROUT...

Страница 123: ...ight the Device Statistics option 2 Press the Return key The Device Statistics screen Figure 11 1 appears Figure 11 1 Device Statistics Screen EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 DEVICE STATISTICS NETWORK A 3792125 16547 0 0 0 0 0 0 0 0 0 SLOT 1 67960 255 0 0 0 0 0 0 0 0 0 PORT 1 67960 255 0 0 0 0 0 0 0 0 0 ENABLE UNSEGMENTED BYTES RECEIVED FRAMES RECEIVED FRAMES FILTERED...

Страница 124: ... collisions are usually caused by The network being so long that the round trip propagation delay is greater than 51 2 µs the collision domain is too large a station somewhere on the network violating Carrier Sense and transmitting at will or a cable somewhere on the network failing during the transmission of a packet CRC ERRORS Displays the number of packets with bad Cyclic Redundancy Checks CRC ...

Страница 125: ...ected The two possible status messages are Segmented or Unsegmented The EMM E6 automatically partitions problem ports or interfaces those having 32 consecutive collisions and re connects non problem segments to the network 11 2 DEVICE STATISTICS SCREEN COMMANDS The Device Statistics screen provides several commands that allow you to access and manipulate various boards and ports This section first...

Страница 126: ...e far right slot is always slot number one 1 PORT This command lets you select and view port statistics for ports 1 through 26 of the device residing in the selected Slot 11 2 1 Selecting an Update Frequency The EMM E6 updates the Device Statistics screen every three seconds by default The EMM E6 allows you to adjust this frequency in intervals of three seconds maximum frequency is 99 seconds To a...

Страница 127: ...light the NETWORK X SLOT X or PORT X command 2 Press the Shift and keys together or just the key until the desired network slot or port number appears 3 Press the Return key Statistics associated with the selected network slot or port appear 11 2 3 Enabling Ports The ENABLE PORT command lets you enable the port selected in the PORT command You must first use the PORT command to select the desired ...

Страница 128: ...sired 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 PORT ADMIN STATUS field displays DISABLED 11 3 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 key The Feature Select...

Страница 129: ...igure 12 1 will function in future releases of the EMM E6 Figure 12 1 EMM E6 CLI Information Screen EMM E6 960 LOCAL MANAGEMENT Cabletron EMM E6 Revision 0 00 00 CLI INFORMATION COMMUNITY NAMES IP TABLE TRAP TABLE SNMP TOOLS RETURN F7 F8 F9 F10 THIS SCREEN RESERVED FOR THE CABLETRON COMMAND LINE INTERFACE ...

Страница 130: ...B Navigator allow you to view and modify a device s objects The MIB Navigator views the MIB tree hierarchy as a directory Figure 13 1 Each layer is numerically encoded so that every branch group and leaf object in the MIB is identified by a corresponding number known as an Object Identifier OID This allows the MIB Navigator to navigate through the MIB and access the manageable leaf objects Figure ...

Страница 131: ... typing telnet followed by pressing the Return key The telnet prompt will appear 2 At the telnet prompt enter open and the IP address of the device followed by pressing the Return key i e telnet open 123 231 213 132 3 The following messages will appear Trying 123 231 213 132 Connected to 123 231 213 132 Password 4 Enter your password at the Password prompt and press the Return key For security rea...

Страница 132: ...s the user to access and manage network devices connected to the device running the MIB Navigator The commands are as follows arp defroute netstat ping snmpbranch snmpget snmpset snmptree traceroute Special Commands Allows the user to exit from the MIB Navigator The commands are as follows done quit exit 13 3 1 Conventions For MIB Navigator Commands The following conventions are used for denoting ...

Страница 133: ... and the dot notation with the built in commands that are using SNMP to access and manage network devices 13 3 2 Navigation Commands The following provides a brief description the proper format and an example of each Navigation command branch The branch command displays all of the leaves in the MIB tree below a specified path The information displayed includes the path name the object ASCII name t...

Страница 134: ...cified must be valid This command has two special subtree options Moves you to one subtree above the current one Moves you to the root Format cd PATH Example MIBNav cd iso org dod internet mgmt ctron The ctron command enables you to change directories directly to the Cabletron MIB 1 3 6 1 4 1 52 without keying in the entire path Format ctron Example MIBNav ctron ...

Страница 135: ...ds are l Displays all instances of the object s OID value 1 3 6 and ASCII leaf object name internet p Displays all entries from the current directory including the object s path name d Displays only directory entries in the tree Format dir ls dir l dir lpd Example MIBNav dir iso Example MIBNav dir l 1 iso get The get command provides you with the value of a specific managed object The command is v...

Страница 136: ...Community Name Allows user to change his her community name in order to allow different access to the MIB mib2 The mib2 command enables you to change directories directly to MIB II 1 3 6 1 2 1 without keying in the entire path Format mib2 Example MIBNav mib2 next The next command enables you to determine the next leaf in a specified path within the managed device s MIB This command operates much l...

Страница 137: ...ree or for managed objects in the MIB If a leaf does not exist for the given path you will be asked what value to assign it The following lists possible value types i nteger number c ounter number g auge number t ime ticks number o p aque value with quotation marks s tring value with quotation marks o id number number number a ddress IP address dotted decimal m ac physical address hex string n ull...

Страница 138: ...mmunity Table Refer to Chapter 6 on how to establish a community name password Format su COMMUNITYNAME Example MIBNav su public tree The tree command provides a display of the entire MIB for the device Leaves and associated values are displayed in columns Format tree Example MIBNav tree 1 3 6 1 2 1 1 1 sysDescr STRING EMRev X X X X 1 3 6 1 2 1 1 2 sysObjectId OBJECT ID 1 3 6 1 4 1 52 1 3 6 1 2 1 1...

Страница 139: ... The whoami command displays your community string and access privileges to the MIB When using the whoami command one of these four access levels will display Basic Read Read Only Read Write and Super User Format whoami Example MIBNav whoami Community Name super Access Level SuperUser ...

Страница 140: ...r MAC address and the media type of connection to the device The device s media connection occurs in one of the following ways 1 Other 2 Invalid entry cannot ping device timed out etc 3 Dynamic route entry 4 Static route entry not subject to change Format arp a to view cache data arp d INTERFACENUM IPADDRESS deletes an IP address entry arp s INTERFACENUM IPADDRESS MACADDR adds a static entry Examp...

Страница 141: ...ach interface Format netstat i netstat r Example MIBNav netstat i Intrfc Description AdmnState OperState MTU Speed 1 enet csmacd up up 1514 10000000 2 enet csmacd up up 1514 10000000 3 enet csmacd up up 1514 10000000 4 enet csmacd up up 1514 10000000 Example MIBNav netstat r Destination Next Hop Interface 122 144 40 0 DirectConnection 4 ping The ping command generates an outbound ping request to c...

Страница 142: ...STRING EMRev X X X X 1 3 6 1 2 1 1 2 sysObjectID OBJECT ID 1 3 6 1 4 1 52 1 3 6 1 2 1 1 3 sysUpTime TIME TICKS 8098654 1 3 6 1 2 1 1 4 sysContact STRING SueJason MIS 1 3 6 1 2 1 1 5 sysName STRING Trng EMME2 1 3 6 1 2 1 1 6 sysLocation STRING 1st floor closet 1 3 6 1 2 1 1 7 sysServices INTEGER 1 snmpget The snmpget command enables you to query another SNMP device to obtain a value for a specified...

Страница 143: ... IP address dotted decimal m ac physical address hex string n ull no type Format snmpset IPADDRESS COMMUNITY NAME OBJECT ID VALUE Example MIBNav snmpset 122 44 1 2 public 1 3 6 1 2 1 1 4 0 Cyrus MIS snmptree The snmptree command provides a display of all objects in the device and their corresponding values Format snmptree IPADDRESS COMMUNITY NAME Example MIBNav snmptree 122 144 89 10 public 1 3 6 ...

Страница 144: ...a TRACEROUTE request to a specified IP address and provides a display of all next hop routers in the path to the device If the device is not reached the command displays all next hop routers to the point of failure Format traceroute IPADDRESS Example MIBNav traceroute 122 144 11 52 next hop 1 122 144 61 45 next hop 2 122 144 8 113 ...

Страница 145: ...ands The following provides a brief description the proper format and an example applicable to each Special command done quit exit These commands enable you to exit from the MIB Navigator and return to the operating system Format done Example MIBNav done Connection closed ...

Страница 146: ...LANVIEW LEDs provide a troubleshooting checklist and explain how and when to reset the EMM E6 14 1 USING LANVIEW The EMM E6 uses the Cabletron Systems built in visual diagnostic and status monitoring system called LANVIEW With LANVIEW you can quickly scan the EMM E6 LEDs to observe network status or diagnose network problems Figure 14 1 LANVIEW LEDs EMM E6 STBY RCV XMT CLN D C B A CPU RESET SN BRI...

Страница 147: ...forwarded as the Spanning Tree Algorithm has put the corresponding Bridge Port into a standby mode due to detecting a data loop condition Network Management has placed the EMM E6 in a Standby condition a data loop condition exists Check with your Network Administrator to find out if the EMM E6 was placed in Standby on purpose If a Data loop does exist reconfigure the network to remove the data loo...

Страница 148: ... any of the segments Contact Cabletron Technical Support for assistance CLN Collision Red Collision detected on a segment When the LAN is operating properly occasional flashing is normal Excessive flashing or a solid light indicates an inordinate number of collisions Ensure that the SQE test is disabled for any transceiver connected to the EMM E6 s external channels D E or F Check cabling for data...

Страница 149: ... 14 2 TROUBLESHOOTING CHECKLIST If your EMM E6 is not operating properly the following checklist describes some of the problems that may occur with the EMM E6 installed in an MMAC possible causes for the problem and suggestions for resolving the problem ...

Страница 150: ...ply LEDs are green Reset EMM E6 by removing it from chassis and reinserting according to directions in Chapter 3 Ensure that all fasteners are tightened No Local Management Password screen Terminal setup is not correct Improper console cable UPS cable pinouts Refer to Chapter 4 for proper setup procedures Refer to Appendix A for proper console UPS port pinouts Cannot contact the EMM E6 from in ban...

Страница 151: ...VRAM may be defective See Chapter 3 for information on the NVRAM switch setting If NVRAM is defective call Cabletron Technical Support No power to an external transceiver connected to an EPIM A EPIM is defective AUI cable is defective Replace EPIM Replace AUI cable High number of collisions on EPIM port External transceiver has SQE enabled Disable SQE Port s go into standby for no apparent reason ...

Страница 152: ...s see Figure 14 1 This reset switch initializes the EMM E6 processor This switch does NOT initialize Non Volatile Random Access Memory NVRAM the non volatile random access memory where the EMM E6 stores network management parameters To use the reset switch use a pen or pencil to press the switch in When this is done the EMM E6 initializes itself ...

Страница 153: ... pre configured reverse address resolution protocol server holding the firmware image Standard Local Download the EMM E6 automatically disables management while you download the new firmware image You can not perform a Standard Download from a BRIM port Remote Runtime Download the EMM E6 continues to operate without interruption while you download the new firmware image The EMM E6 stores the new i...

Страница 154: ...onto your network rarp server decompress the image file For information on setting up a workstation as a rarp server refer to your specific workstation documentation This documentation includes limited information and guidelines for setting up a UNIX workstation to act as a reverse address resolution protocol rarp server NOTE For your convenience Cabletron includes the PKUNZIP utility for easy dec...

Страница 155: ...and examples where appropriate Bold lettering in examples indicates operator entry Before you start Editing ethers or hosts files requires Root Superuser access Downloading an image file requires setting up your UNIX workstation as a reverse address resolution protocol rarp server To set up a UNIX workstation 1 Edit the etc ethers file by adding the EMM E6 MAC address followed by a unique name e g...

Страница 156: ...6 S 11 05 rarpd a root 88 0 0 0 0 24 0 IW 11 05 rarpd a The term rarpd a located at the end of the root string indicates rarp is active If rarp is NOT running only the grep process appears 4 If you do NOT have a tftpboot directory then you must create one e g unix mkdir tftpboot and start the rarp daemon e g unix rarpd a 5 Ensure that the tftpboot directory is not owned e g unix chown nobody tftpb...

Страница 157: ...o the tftpboot daemon e g the sign that comments out the line 8 Kill the inetd process e g unix kill HUP process ID number and then restart the process e g unix inetd to enable the revised inetd conf file You must request a process status and grep for inetd to obtain the process ID number see step 3 above NOTE ...

Страница 158: ...tion activates the download process after you reinstall the board 5 Follow the installation procedures from Chapter 3 to re install the EMM E6 properly Image file download takes several minutes While downloading the EMM E6 CPU LED flashes and the XMT RCV pair receiving the image flickers rapidly The EMM E6 Boot up Diagnostics indicate a file transfer from a server is in progress After the image fi...

Страница 159: ...group is 1 3 6 1 4 1 52 4 1 5 8 1 When performing the steps in Table 15 1 keep the following in mind You must follow the steps in order Enter the IP address of the tftp server in standard dotted decimal notation e g 132 177 118 24 Enter the FULL path to the image file in the ctDLTFTPRequest OID including the name of the image file e g c tftpboot EMME6 hex Table 15 1 Standard Download Procedure Ste...

Страница 160: ...You must follow the steps in order Enter the IP address of the tftp server in standard dotted decimal notation e g 132 177 118 24 Enter the FULL path to the image file in the ctDLTFTPRequest OID including the name of the image file e g c tftpboot EMME6 fls If the Runtime Download is interrupted the Firmware Image in Flash memory will be erased The EMM E6 will continue to operate until it is either...

Страница 161: ...ds to Flash memory The EMM E6 does not use the new image until you press the Reset button 3 forceDownLoad Reset The new image downloads to Flash memory The EMM E6 automatically resets upon completion of the download 4 ctDLOperStatus This OID monitors the progress of the Runtime Download 1 3 6 4 1 52 4 1 5 8 1 17 0 Integer 2 Indicates that a TFTP download request has been received but has not yet b...

Страница 162: ...you selected forceDownLoad at Step 3 then you can reset the EMM E6 at a later time You can reset the EMM E6 remotely using the ctDLInitiateColdBoot OID described at Step 5 or manually using the Reset Button or Cycle Power 5 ctDLInitiateColdBoot 1 3 6 1 4 1 52 4 1 5 8 1 3 0 integer 1 Table 15 2 Runtime Download Procedure Continued Step OID Name OID Number Data Type SNMP OID Data ...

Страница 163: ...FUNCTIONALITY FLASH Memory 2 MB expandable to 14 MB Shared Sonic Memory 4 MB expandable to 12 MB Internal Processor Intel 80960 Read Only Memory 128K Non Volatile RAM 128K Ethernet Controller 4 DP83932 Controllers CPU Memory 8 MB expandable to 12MB Packet Filter Rate max viewed per second 30 000 packets Packet Forward Rate max forwarded per second 22 000 packets Forwarding Latency 91 µs min Ageing...

Страница 164: ... one of the segments a pattern of 1 0 is sent to the other segments Minimum Packet Repeated 96 bits including preamble Packet fragments are extended using the JAM 1 0 data pattern FAULT Protection Each segment will disconnect itself from the other segments if 32 consecutive collisions occur or the collision detector of a segment is on for longer than approximately 2 4 ms This FAULT protection will...

Страница 165: ... 1 port 7 Not used 8 Not used A 4 COM 2 PORT Type Standard RJ45 port Pin 1 Transmit Data XMT From COM 2 port 2 Data Set Ready DSR To COM 2 port 3 Not used 4 Receive Data RCV To COM 2 port 5 Signal Ground GND 6 Data Terminal Ready DTR From COM 2 port 7 Not used 8 Not used A 5 ENVIRONMENTAL REQUIREMENTS Operating Temperature 5 to 40 C 41 to 104 F Non operating Temperature 30 to 90 C 22 to 194 F Oper...

Страница 166: ...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 A 7 PHYSICAL PROPERTIES Dimensions 34 04D x 29 21H x 7 64W cm 13 4D x 11 5H x 3 0W in Weight Unit 1 25 kg 2 75 lbs Shipping 1 74 kg 3 83 lbs It is the responsibility of the person who sells the system of which the EMM E6 will be a part to ensure that the...

Страница 167: ...e switch on the EPIM T determines the cross over status of the cable pairs The switch residing on the X side indicates the pairs internally cross over If the switch resides on the side the pairs do not internally cross over See Figure A 2 Figure A 2 Cross over Switch on the EPIM T Position not crossed over 1 TX 2 TX 3 RX 4 NC 5 NC 6 RX 7 NC 8 NC Position X crossed over 1 RX 2 RX 3 TX 4 NC 5 NC 6 T...

Страница 168: ... 8 2 dBm Transmitter Power Into 50 125 µm fiber 13 0 dBm 62 5 125 µm fiber 10 0 dBm 100 140 µm fiber 7 0 dBm Bit Error Rate Better than 10 10 The transmitter power and receive sensitivity levels below represent Peak Power Levels after optical overshoot You must use a Peak Power Meter to correctly compare the above values to those you measure on any particular port If you measure Power Levels with ...

Страница 169: ...ransmitter power is inversely proportional to temperature rise Use the Output Power Coefficient to calculate increased or decreased power output for your operating environment For example typical power output at 25C equals 16 4 dBm For a 4C temperature increase multiply the typical coefficient 0 15 dBm by four and add the result to the typical output power 4 x 0 15 dBm 16 4 dBm 17 0 dBm NOTE ...

Страница 170: ... RX Sensitivity 29 5 dBm MAX Receive Power 6 99 dBm Bit Error Rate Better than 10 10 The above transmitter power levels and receive sensitivity levels represent Peak Power Levels after optical overshoot You must use a Peak Power Meter to correctly compare the above values to those you measure on any particular port If you measure Power Levels with an Average Power Meter you must subtract 3 dBm fro...

Страница 171: ...port you can internally terminate the port on the module via a built in 50Ω terminator This eliminates the need to connect the port to a T connector and terminator Grounding For safety connect only one end of a thin net segment to earth ground Do not connect the BNC port of an EPIM C to earth ground Internal Termination Switch On internally terminated Off need external termination Connecting a thi...

Страница 172: ...ector for EPIM X Figure A 6 Type 15 position D type receptacle Figure A 6 EPIM A and EPIM X AUI Port Table A 3 DB 15 Pinouts Connector Shell Protective Ground Pin 1 Logic Ref Pin 9 Collision 2 Collision 10 Transmit 3 Transmit 11 Logic Ref 4 Logic Ref 12 Receive 5 Receive 13 Power 12 Vdc 6 Power Return 14 Logic Ref 7 No Connection 15 No Connection 8 Logic Ref ...

Страница 173: ...vendors B 1 SPANNING TREE PROTOCOL The following OID is used to select the desired Spanning Tree Protocol ctBridgeStpProtocolSpecification Description This object allows the network manager to select which Spanning Tree Protocol will be operational on the bridge The value decLb100 2 indicates the DEC LANBridge 100 Spanning Tree Protocol The value ieee8021d 3 indicates the IEEE 802 1d Spanning Tree...

Страница 174: ...ot yet transmitted information which would notify the EMM E6 of its network location The generation of ARP Request packets in such a situation would allow the EMM E6 to locate the reconfigured station without waiting for that station to transmit rptrScrAddrMgmtHashType Description Forces the EMM E6 to utilize a specific framing type for any ARP Request packet The values entered determine the frami...

Страница 175: ... 4 1 1 1 4 1 5 3 2 Data Type Integer Values 1 unlock 2 lock 3 portMisMatch Access Policy read write rptrPortGrpSrcAddrLock Description Allows the setting of the lock status for this port group Unlock 1 unlocks the source address lock for this group Lock 2 locks the source address for this group Setting a value of portMisMatch 3 for this value is invalid A read of PortMisMatch 3 means that the lock...

Страница 176: ... containing a 0 This object provides an easy method to add or delete conceptual rows in the rptrPortSecurityListTable The returned value has little or no actual meaning Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 3 9 1 1 4 Data Type Octet String size 6 Access Policy read write rptrPortSecurityLockDelAddress Description Setting a value to this object deletes a corresponding entry in the rptrPortSecu...

Страница 177: ...e is enabled 2 Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 3 9 1 1 6 Data Type Integer Values 1 disable 2 enable Access Policy read write rptrPortSecurityFullSecEnabled Description A port that is set to full security and is locked will scramble all packets which are not contained in the expected source address list including broadcasts and multicasts A port that is set to partial security will allo...

Страница 178: ...B 4 1 Enabling Network Level SNMP Traps The next three OIDs control traps enable and disable at the network level or channel level rptrHwTrapsSetLink Description Enables and disables link traps for this network i e Channel A B or C Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 1 6 1 1 Data Type Integer Values 1 disable 2 enable Access Policy read write rptrHwTrapsSetSeg Description Enables and disabl...

Страница 179: ...r traps enable and disable at the board level The b value is the number of the module in the MMAC chassis to be examined This number will be based on the location of the module in the chassis For detailed descriptions of the location numbering scheme in your MMAC chassis please refer to your MMAC User s Guide rptrPortGrpHwTrapSetLink Description Enables and disables link traps for the specified po...

Страница 180: ... 1 2 b Data Type Integer Values 1 disable 2 enable Access Policy read write B 4 3 Enabling Port Level SNMP Traps The next three OIDs are for traps enable and disable at the port level The b value is the number of the module in the MMAC chassis to be examined This number will be based on the location of the module in the chassis For detailed descriptions of the location numbering scheme in your MMA...

Страница 181: ...rite rptrPortHwTrapSetSeg Description Enables and disables segmentation traps for this port Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 3 8 1 1 1 4 b p Data Type Integer Values 1 disable 2 enable Access Policy read write rptrPortGrpSaTrapSetSrcaddr Description Enables and disables source address traps for the specified port group Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 3 8 2 1 1 3 b p Data Type ...

Страница 182: ...s necessary to determine the OID instances of the RMON bundles before they may be enabled or disabled chCompName Description Returns OID values for the location of the RMON bundle OIDs in the device being examined These values may be used in conjunction with the chCompAdminStatus OID below to activate and deactivate the individual RMON bundles Object Identifier 1 3 6 1 4 1 52 4 1 1 2 4 1 5 Data Ty...

Страница 183: ...port before locking the port via the module or channel Failing to do this will cause the port to become locked out when the third address is seen on the trunk port rptrPortSrcAddrForceTrunk Description When this object is set to Force it places the port into a Trunk topology state whether or not the network traffic warrants such a state When this object is set to NoForce it allows the port to assu...

Страница 184: ...tes the connection status of the CSMA CD board to the inter RIC bus Object Identifier 1 3 6 1 4 1 52 1 6 1 2 2 1 1 2 slot Data Type Integer Values 1 Channel B 2 Channel C 4 Channel A Access Policy read write fnbPortConnectPortAssignment Description Provides the capability to change or query the specific interface that the port is assigned Object Identifier 1 3 6 1 4 1 52 1 6 1 2 3 1 1 3 slot port ...

Страница 185: ... Description This enables and disables DECnet hashing on source addresses which is useful in DECnet environments Object Identifier 1 3 6 1 4 1 52 4 1 1 1 4 1 5 3 4 0 Data Type Integer Values 1 NoDECnetHashing 2 DECnetHashing Access Policy read write B 10 REMOTE DOWNLOADING For detailed step by step instructions on the use of OIDs for forcing a remote download of firmware instruction code to the EM...

Страница 186: ... IEEE standard which governs the operation of devices connecting to Ethernet fiber optic cable Supersedes previous FOIRL standard 10BASE T IEEE standard which governs the operation of devices connecting to Ethernet Unshielded Twisted Pair UTP cable Alarm A notification generated by the operation of SNMP which is sent to a management station to indicate a problem with the network or warn of an erro...

Страница 187: ...y Digit A bit is the smallest unit of information consisting of a single binary number A bit is represented by a numerical value of 1 or 0 BOOTP Bootstrap Protocol Checks MIB variables of a SNMP manageable device to determine to determine wether it should start up using its existing firmware or boot up from a network server specifically configured for the purpose Branch Group A collection of MIBs ...

Страница 188: ...orking tasks These servers are accessed by several clients workstations which cannot perform those functions to the same extent or with the same efficiency as the servers Coaxial An Ethernet media type which consists of a core of electrically conductive material surrounded by several layers of insulation and shielding Community Name An identification which allows a specific level of access to the ...

Страница 189: ...to transmit data and what to do if they sense a collision or other error during that transmission Data Information typically in the form of a series of bits which is intended to be stored altered displayed transmitted or processed Data Loop A condition caused by the creation of duplicate paths which network transmissions could follow Data loops are created by the use of redundant connections betwe...

Страница 190: ...ards are devices which are added to workstations to provide them with a connection to a network NIC EEPROM Electronic Erasable Programmable Read Only Memory Encryption A security process which encodes raw data into a form that cannot be utilized or read without decryption EPIM Ethernet Port Interface Module EPIMs are added to specifically designed slots in Cabletron Ethernet products to provide co...

Страница 191: ...es and maintains data files for the use and modification of users on the network Firmware The software instructions which allow a network device to function See also Image file Flash EEPROM See EEPROM FNB Flexible Network Bus A Cabletron backplane design which enables an FNB configured chassis to support multiple network architectures simultaneously Frame A group of bits that form a discrete block...

Страница 192: ...easure of the opposition of electrical current or signal flow in a length of cable In Band Performed through the operating network architecture Refers most commonly to management functions See also Out of Band Interface A connection to a network Unlike a port an interface is not necessarily an available physical connector accessible through the front panel of a device Interfaces may be used as bac...

Страница 193: ...ational information pertaining to network devices through the use of prominently displayed LEDs LDRAM Local Dynamic Random Access Memory Leaf Object An end unit in a MIB tree Leaf objects are accessed through a series of branch groups Leaf objects are always individual MIBs LED Light Emitting Diode A simple electronic light used in networking equipment to provide diagnostic indicators Also used as...

Страница 194: ...device which provides power cooling interconnection and monitoring functions to a series of flexible and centralized modules for the purposes of creating a network or networks Module A discrete device which is placed in a modular chassis to provide functionality which may include but is not limited to bridging routing connectivity and repeating Modules are easily installed and removed Also any dev...

Страница 195: ...Band Performed without requiring the operation of the network architecture Most commonly used in reference to local management operations Packet A discrete collection of bits that form a block of information Packets are similar to frames but may be made up of control information frames or data to be transmitted Plenum A cabling term which indicates a cable with insulating material that is consider...

Страница 196: ...ular connector style used with twisted pair cabling The RJ45 connector resembles the modern home telephone connector RJ11 RMIM Repeating Media Interface Module A term used to indicate a family of Cabletron Ethernet Media Interface Modules See MIM which are capable of performing their own repeater functions RMON Remote MONitoring RMON is a network management standard which provides more detailed ne...

Страница 197: ...ypically driven by lasers The use of lasers and the transmission characteristics of single mode fiber optics allow the media to cover greater distances than multimode fiber optics SMA Sub Miniature Assembly A modular connector and port system used in multimode fiber optic cabling The SMA connector is threaded and is screwed into an SMA port SNMP Simple Network Management Protocol SNMP is a standar...

Страница 198: ...bling See also cross over Subnet A physical network within an IP network Subnet Mask A 32 bit quantity which may be set up in SNMP management devices to indicate which bits in an IP address identify the physical network Switch A network device which connects two or more separate network segments and allows traffic to be passed between them when necessary A switch determines if a packet should be b...

Страница 199: ...a Token and dictates that stations will receive information at pre determined intervals and in a definite series Topology The physical organization of stations and devices into a network Transceiver A device which transmits and receives A transceiver provides the electrical or optical interface to the network media and may convert signals from one media for use by another Trap See Alarm User Any p...

Страница 200: ...3 5 Channel B 1 13 Channel C 1 13 Channel D 1 15 Channel E 1 16 Channel F 1 16 Channels A B C 1 12 Class A B C 1 24 Collision handling 1 18 Command Set 13 3 Community Names 1 21 3 5 Setting 6 1 Connecting to the Network 3 18 Crosstalk 2 3 ctron 13 5 CXRMIM 2 7 D D Channel 1 15 Data Link Level 1 17 Data loops STA 1 19 Default Gateway 1 30 Default Gateway setting 7 6 Device Statistics screen 11 1 Di...

Страница 201: ...ORMIM 22 2 7 Forward Rate A 1 Forwarding 1 18 G GET 1 21 get 13 6 Grounding 2 6 H help 13 7 Host ID 1 23 Host IP Address 7 4 I IANA 1 23 Image File Download 15 1 Impedance 10BaseT 2 2 Insertion Loss 10BaseT 2 2 Installing 3 13 Interface number 7 2 Introduction 1 1 Intruder Prevention 1 33 IP addresses 1 23 L LANVIEW 14 1 CLN 14 3 CPU 14 2 RCV 14 2 STBY 14 2 XMT 14 3 LANVIEWSECURE 1 33 Latency A 1 ...

Страница 202: ...latile RAM 3 5 O OID 1 22 B 1 description 13 1 editing viewing 9 1 getting 9 4 setting 9 5 OSI model 1 17 P Partitioning Networks 1 25 Password 3 5 Screen 5 1 Setting 6 1 ping 13 12 Ports enabling 7 9 Pinouts A 3 unlocking 7 9 Propagation Delay 10BaseT 2 3 multimode fiber 2 4 pwd 13 8 Q quit 13 16 R Read only 1 21 Read write 1 21 Read Only 6 2 Read Write 6 2 Remote runtime download 15 1 Requiremen...

Страница 203: ...thm 1 19 Specifications A 1 Environmental A 3 Statistics viewing 11 1 su 13 9 Subnet 1 26 Subnet address 1 25 Subnet Mask 1 26 Modifying 7 5 Operation 1 30 Super user 1 21 6 2 Default password 5 2 T Technical Support 1 35 Telnet 13 2 Terminals configuration 4 1 THN MIM 3 4 TPRMIM 2 7 TPXMIM 2 8 traceroute 13 15 Transceivers 2 6 Trap 1 21 Trap Table configuring 8 2 tree 13 9 Troubleshooting 14 1 U ...

Страница 204: ...st be in OFF position 2 Cabletron Systems Use Only Must be in OFF position 3 Cabletron Systems Use Only Must be in OFF position 4 MIMREV Should be OFF unless THN MIM s with part numbers below 9000043 05 are located in the MMAC 5 Baud Rate Default Sets local management console port baud rate OFF default 9600 Baud ON 2400 baud 6 Forced Download When toggled forces image files to be loaded from BOOTP...

Страница 205: ...g normal operation STBY LEDs lit or unlit depending on the results of spanning tree operation Appropriate BRIM EPIM LEDs lit ON LED lit for the active Channel D EPIM Use the following setup parameters for a VT Terminal or Terminal Emulation package to connect to Local Management functions Columns 80 Columns Controls Interpret Controls Autowrap No Autowrap Scroll Jump Scroll Text Cursor Cursor Curs...

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