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Manual Cabletron Systems 2H253-25R

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  • Cabletron Systems 2H253-25R - page 1

    9034006 2H253-25R Smar tSwitch 2200 Installation User’ s Guide 2H253-25R COM PWR CPU RESET LED MODE RX-TX DPX-SPD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 13 15 16 17 18 19 20 21 22 23 24 FAST ETHERNET WORKGROUP SWITCH ...

  • Cabletron Systems 2H253-25R - page 2

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    i NOTICE Cabletron Systems reserves the right to make changes in specifications and other information contained in this document without prior notice. The reader should in all cases consult Cabletron Systems to determine whether an y such changes hav e been made. The hardware, firmware, or softw are described in this manual is subject to change w ...

  • Cabletron Systems 2H253-25R - page 4

    ii FCC NOTICE This device complies with P art 15 of the FCC rules. Operation is subject to the following two conditions: (1) this de vice may not cause harmful interference, and (2) this device must accept an y interference receiv ed, including interference that may cause undesired operation. NOTE: This equipment has been tested and found to comply ...

  • Cabletron Systems 2H253-25R - page 5

    iii CABLETRON SYSTEMS, INC. PROGRAM LICENSE AGREEMENT IMPOR T ANT : THIS LICENSE APPLIES FOR USE OF PRODUCT IN THE FOLLO WING GEOGRAPHICAL REGIONS: CANAD A MEXICO CENTRAL AMERICA SOUTH AMERICA BEFORE OPENING OR UTILIZING THE ENCLOSED PRODUCT , CAREFULL Y READ THIS LICENSE A GREEMENT . This document is an agreement (“ Agreement”) between Y ou, t ...

  • Cabletron Systems 2H253-25R - page 6

    iv If the Program is exported from the United States pursuant to the License Exception TSR under the U.S. Export Administration Regulations, in addition to the restriction on transfer set forth in Sections 1 or 2 of this Agreement, Y ou agree not to (i) reexport or release the Program, the source code for the Program or technology to a national of ...

  • Cabletron Systems 2H253-25R - page 7

    v CABLETRON SYSTEMS SALES AND SERVICE, INC. PROGRAM LICENSE AGREEMENT IMPOR T ANT : THIS LICENSE APPLIES FOR USE OF PRODUCT IN THE UNITED ST A TES OF AMERICA AND BY UNITED ST A TES OF AMERICA GO VERNMENT END USERS. BEFORE OPENING OR UTILIZING THE ENCLOSED PRODUCT , CAREFULL Y READ THIS LICENSE A GREEMENT . This document is an agreement (“ Agreeme ...

  • Cabletron Systems 2H253-25R - page 8

    vi 5. UNITED STATES GOVERNMENT RESTRICTED RIGHTS. The enclosed Product (i) was developed solely at private expense; (ii) contains “restricted computer software” submitted with restricted rights in accordance with section 52.227-19 (a) through (d) of the Commercial Computer Software-Restricted Rights Clause and its successors, and (iii) in all r ...

  • Cabletron Systems 2H253-25R - page 9

    vii CABLETRON SYSTEMS LIMITED PROGRAM LICENSE AGREEMENT IMPOR T ANT : THIS LICENSE APPLIES FOR THE USE OF THE PRODUCT IN THE FOLLO WING GEOGRAPHICAL REGIONS: EUR OPE MIDDLE EAST AFRICA ASIA A USTRALIA P A CIFIC RIM BEFORE OPENING OR UTILIZING THE ENCLOSED PRODUCT , CAREFULL Y READ THIS LICENSE A GREEMENT . This document is an agreement (“ Agreeme ...

  • Cabletron Systems 2H253-25R - page 10

    viii If the Program is exported from the United States pursuant to the License Exception TSR under the U.S. Export Administration Regulations, in addition to the restriction on transfer set forth in Sections 1 or 2 of this Agreement, Y ou agree not to (i) reexport or release the Program, the source code for the Program or technology to a national o ...

  • Cabletron Systems 2H253-25R - page 11

    ix DECLARATION OF CONFORMITY Application of Council Directiv e(s): 89/336/EEC 73/23/EEC Manufacturer’s Name: Cabletron Systems, Inc. Manufacturer’ s Address: 35 Industrial Way PO Box 5005 Rochester, NH 03867 European Representative Name: Mr. J. Solari European Representativ e Address: Cabletron Systems Limited Nexus House, Newbury Business Park ...

  • Cabletron Systems 2H253-25R - page 12

    x ...

  • Cabletron Systems 2H253-25R - page 13

    xi Contents Figures .......................................................................................................................................... xiii Tables............................................................................................................................................ xiv ABOUT THIS GUIDE Using This Guide.. ...

  • Cabletron Systems 2H253-25R - page 14

    xii 3 INSTALLATION 3.1 Unpacking the Device ..................................................................................... 3-1 3.2 Installing Options............................................................................................. 3-2 3.3 Installing the Device ...................................................................... ...

  • Cabletron Systems 2H253-25R - page 15

    xiii Figures Figure P age 1-1 The 2H253-25R SmartSwitch 2200................................................................................. 1-1 3-1 Tabletop or Shelf Installation ........................................................................................... 3-4 3-2 Attaching the Strain-Relief Bracket ................................. ...

  • Cabletron Systems 2H253-25R - page 16

    xiv T ab les Ta b l e P age 3-1 Contents of 2H253-25R Carton ........................................................................................ 3-2 4-1 LANVIEW LEDs .............................................................................................................. 4-2 4-2 Troubleshooting Checklist .................................. ...

  • Cabletron Systems 2H253-25R - page 17

    xv About This Guide W elcome to the 2H253-25R SmartSwitch 2200 Installation User’s Guide . This guide describes the 2H253-25R SmartSwitch 2200 de vice and provides information concerning netw ork requirements, installation, and troubleshooting. For information about ho w to use Local Management to configure and manage the 2H253-25R, refer to the ...

  • Cabletron Systems 2H253-25R - page 18

    Related Documents xvi Chapter 4 , T roubleshooting , describes the function of the LANVIEW LEDs, which can help to quickly diagnose network/operational problems. Appendix A , Specifications , contains information on functionality and operating specifications, connector pinouts, en vironmental requirements, and physical properties. Appendix B , Op ...

  • Cabletron Systems 2H253-25R - page 19

    Document Conv entions xvii The HSIM-W6 Installation Guide , the HSIM-W84 Installation Guide , and the W AN Series Local Management User’ s Guide are included on the QuickSET CD-R OM and, along with the other manuals listed abov e, can be obtained from the W orld W ide W eb in Adobe Acrobat Portable Document Format (PDF) at the follo wing site: ht ...

  • Cabletron Systems 2H253-25R - page 20

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    Introduction 1-1 1 Intr oduction This chapter introduces the 2H253-25R SmartSwitch 2200 de vice and pro vides information about ho w to obtain additional support from Cabletron Systems. 1.1 OVERVIEW The 2H253-25R ( Figure 1-1 ) is an Ethernet/Fast Ethernet standalone de vice with two RJ21 front panel connectors (each containing 12 switched ports), ...

  • Cabletron Systems 2H253-25R - page 22

    Ov er vie w 1-2 Introduction The 2H253-25R is used to connect indi vidual high-bandwidth user de vices, such as workstations, or to provide a central switching point for multiple 10/100 Mbps F ast Ethernet segments. The optional HSIMs provide high speed uplinks to netw orking technologies such as Fast Ethernet, Gigabit Ethernet, Fiber Distributed D ...

  • Cabletron Systems 2H253-25R - page 23

    Ov er vie w Introduction 1-3 When Auto-Negotiation is supported at both ends of a link, the two de vices dynamically adjust to full or half duplex operation based on the maximum capability that can be reached between the two de vices. If the device connected to the 2H253-25R cannot auto-ne gotiate, the 2H253-25R operates according to the capabiliti ...

  • Cabletron Systems 2H253-25R - page 24

    Ov er vie w 1-4 Introduction SmartT runk, also referred to as SmartTrunking, is Cabletron Systems’ terminology for load balancing or load sharing. SmartT runk provides the ability to take full adv antage of the network’ s redundant bandwidth. SmartT runk divides network traf fic across multiple ports in parallel to provide additional throughpu ...

  • Cabletron Systems 2H253-25R - page 25

    Ov er vie w Introduction 1-5 1.1.9 Rate Limiting The Rate Limiting feature enables the SmartSwitch de vice to control traf fic rates on a per-port, per-priority basis. The network administrator can configure a rate limit (from 100 kbps to 1 Gbs) for a gi ven port with an associated list of IEEE 802.1p priorities (which can include one, some, or a ...

  • Cabletron Systems 2H253-25R - page 26

    Ov er vie w 1-6 Introduction 1.1.11 GARP Switch Operation Some or all ports on the switch may be acti v ated to operate under the Generic Attribute Registration Protocol (GARP) applications, GARP VLAN Registration Protocol (GVRP) and/or GARP Multicast Registration Protocol (GMRP). GARP is a protocol, or set of rules, that outlines a mechanism for p ...

  • Cabletron Systems 2H253-25R - page 27

    Ov er vie w Introduction 1-7 1.1.15 Optional HSIMs and VHSIMs Optional HSIMs and VHSIMs are av ailable from Cabletron Systems for additional connectivity to v arious networking technologies. The HSIMs and VHSIMs av ailable for the 2H253-25R are listed in the Release Notes shipped with the de vice. 1.1.16 Standar ds Compatibility The 2H253-25R is fu ...

  • Cabletron Systems 2H253-25R - page 28

    Getting Help 1-8 Introduction 1.2 GETTING HELP For additional support related to this de vice or document, contact Cabletron Systems using one of the follo wing methods: Before calling Cabletron Systems, have the following information ready: • Y our Cabletron Systems service contract number • A description of the failure • A description of an ...

  • Cabletron Systems 2H253-25R - page 29

    Network Requirements 2-1 2 Netw ork Requirements Before installing the 2H253-25R, re vie w the requirements and specifications referred to in this chapter concerning the follo wing: • SmartT runk ( Section 2.1 ) • 10B ASE-T T wisted Pair Network ( Section 2.2 ) • 100B ASE-TX T wisted Pair Network ( Section 2.3 ) The network installation must ...

  • Cabletron Systems 2H253-25R - page 30

    100BASE-TX Network 2-2 Network Requirements 2.3 100B ASE-TX NETWORK The two RJ21 connectors on the front panel of the 2H253-25R each pro vide 12 fixed ports (ports 1 through 24) that support Category 5 UTP cabling. The device at the other end of the twisted pair segment must meet IEEE 802.3u 100B ASE-TX Fast Ethernet netw ork requirements for the ...

  • Cabletron Systems 2H253-25R - page 31

    Installation 3-1 3 Installation This chapter provides the instructions required to install the 2H253-25R. A Phillips screwdri ver is required to install options into the de vice or install the de vice into a rack. Follo w the order of the sections listed belo w to correctly install the de vice. • Unpacking the De vice ( Section 3.1 ) • Installi ...

  • Cabletron Systems 2H253-25R - page 32

    Installing Options 3-2 Installation 3. Remove the tape seal on the non-conductive bag to remove the 2H253-25R. 4. Perform a visual inspection of the device for any signs of physical damage. Contact Cabletron Systems if there are any signs of damage. Refer to Section 1.2 for details. 3.2 INSTALLING OPTIONS If the 2H253-25R is to be installed with an ...

  • Cabletron Systems 2H253-25R - page 33

    Installing the De vice Installation 3-3 3.3.1 T abletop or Shelf Installation The follo wing two subsections pro vide guidelines for installation on a tabletop or shelf. Guidelines for T abletop and Shelf Installations T abletop and shelf installations must be within reach of the network cabling and meet the requirements listed belo w: • Locate t ...

  • Cabletron Systems 2H253-25R - page 34

    Installing the De vice 3-4 Installation Figure 3-1 T abletop or Shelf Installation 3.3.2 Rac kmount Installation T o install the 2H253-25R in a 19-inch rack, Cabletron Systems includes a strain-relief bracket for cable management and an accessory kit containing the rackmount brackets, and mounting scre ws to attach the rackmount brackets and strain ...

  • Cabletron Systems 2H253-25R - page 35

    Installing the De vice Installation 3-5 Installation Rack mounting the 2H253-25R in volv es the following: • Attaching the strain-relief bracket • Rack mounting the 2H253-25R (attaching the mounting brackets and fastening the de vice to the rack) Attaching the Strain-Relief Brac ket Attach the strain-relief bracket to the 2H253-25R as follo ws: ...

  • Cabletron Systems 2H253-25R - page 36

    Installing the De vice 3-6 Installation Rack Mounting the 2H253-25R Proceed as follo ws to install the 2H253-25R into a 19-inch rack: 1. There are several mounting holes in the rackmount brackets and the bottom of the chassis so that each mounting bracket may be adjusted forward or backward to mount the device further into, or out of the rack, depe ...

  • Cabletron Systems 2H253-25R - page 37

    Installing the De vice Installation 3-7 3.3.3 Connecting P ower T o connect the 2H253-25R to the power sources, proceed as follo ws: 1. Plug each power cord into a grounded wall outlet, see Figure 3-5 . To take advantage of the load sharing and redundancy capabilities, each power cord must be plugged into a separate dedicated ac outlet. The POWER L ...

  • Cabletron Systems 2H253-25R - page 38

    Connecting to the Network 3-8 Installation 2. Observe the LANVIEW LEDs. After a successful boot, the PWR LED turns ON (green). If the PWR LED is amber, there is no power redundancy. Check the power cord connections and the power source. If there are no problems with the power cord connections or power source and the PWR LED is still amber, contact ...

  • Cabletron Systems 2H253-25R - page 39

    Connecting to the Network Installation 3-9 Figure 3-6 Straight Cable Connection 3. Tighten the two screws on the RJ21 straight cable connector to secure it to the device. 4. Verify that a link exists on each twisted pair segment of the RJ21 connector by checking that the associated port RX LED is on (flashing amber, blinking green, or solid green). ...

  • Cabletron Systems 2H253-25R - page 40

    Completing the Installation 3-10 Installation c. Verify that the 100BASE-TX device at the other end of the twisted pair segment is powered up. d. Check the cable for continuity. e. If a link is not established, contact Cabletron Systems for technical support. Refer to Section 1.2 for details. 5. Repeat steps 1 through 4 above, until all connections ...

  • Cabletron Systems 2H253-25R - page 41

    T roubleshooting 4-1 4 T r oubleshooting This chapter provides information concerning the follo wing: • Using LANVIEW ( Section 4.1 ) • T roubleshooting Checklist ( Section 4.2 ) • Using the RESET Button ( Section 4.3 ) 4.1 USING LANVIEW The 2H253-25R uses Cabletron Systems’ built-in visual diagnostic and status monitoring system called LAN ...

  • Cabletron Systems 2H253-25R - page 42

    Using LANVIEW 4-2 T roubleshooting The LED MODE switch is located on the front panel of the 2H253-25R as sho wn in Figure 4-1 . This switch enables the user to change the function of the port LEDs. When the LED MODE switch is mov ed to the left, the LEDs indicate the receive (RX) and transmit (TX) status of the respecti ve fix ed ports (ports 1 th ...

  • Cabletron Systems 2H253-25R - page 43

    Using LANVIEW T roubleshooting 4-3 CPU Of f Po wer of f. Po wer up de vice. Red Blinking . Hardware failure has occurred. Contact Cabletron Systems for assistance. Solid . Resetting, normal po wer up reset. If the LED remains Red for se veral minutes, contact Cabletron Systems for assistance. Amber Blinking . Crippled. Contact Cabletron Systems for ...

  • Cabletron Systems 2H253-25R - page 44

    Using LANVIEW 4-4 T roubleshooting TX (T ransmit) Off Port enabled, and no acti vity . Should flash green e very tw o seconds indicating BPDUs being sent if ST A is enabled and there is a v alid link. 1. Ensure that the STA is enabled and that there is a valid link. 2. Contact Cabletron Systems for assistance. Green Flashing . Indicates acti vity ...

  • Cabletron Systems 2H253-25R - page 45

    T roubleshooting Checklist T roubleshooting 4-5 4.2 T ROUB LESHOOTING CHECKLIST If the 2H253-25R is not working properly , refer to T able 4-2 for a checklist of possible problems, causes, and recommended actions to resolve the problem. T able 4-2 T roubleshooting Chec klist Prob lem P ossible Cause Recommended Action All LEDs are OFF . Loss of pow ...

  • Cabletron Systems 2H253-25R - page 46

    T roubleshooting Checklist 4-6 T roubleshooting Cannot contact the 2H253-25R through in-band management. IP address not assigned. Refer to the SmartSwitch Series 2E253, 2H252, 2H253, and 2H258 Local Management User’ s Guide for IP address assignment procedure. Port is disabled. Enable port. Refer to the SmartSwitch Series 2E253, 2H252, 2H253, and ...

  • Cabletron Systems 2H253-25R - page 47

    T roubleshooting Checklist T roubleshooting 4-7 User parameters (IP address, De vice and Module name, etc.) were lost when the 2H253-25R po wer was c ycled or the front panel RESET button was pressed. 1. Position of Mode switch (7), NVRAM Reset, was changed sometime before either cycling power or pressing the RESET button, causing the user-entered ...

  • Cabletron Systems 2H253-25R - page 48

    Using the RESET Button 4-8 T roubleshooting 4.3 USING THE RESET BUTTON The RESET button sho wn in Figure 4-2 resets and re-initializes the 2H253-25R. Figure 4-2 RESET Button T o reset the 2H253-25R processor, press and release the RESET b utton. The 2H253-25R goes through a reset process for approximately 60 seconds. Additional downtime may result ...

  • Cabletron Systems 2H253-25R - page 49

    Specifications A-1 A Specifications This appendix provides operating specifications for the Cabletron Systems 2H253-25R. Cabletron Systems reserves the right to change these specifications at an y time without notice. A.1 DEVICE SPECIFICATIONS A.2 PHYSICAL PR OPER TIES Processors: Intel i960 RISC processor Po wer PC Dynamic Random Access Memory ...

  • Cabletron Systems 2H253-25R - page 50

    Electrical Specifications A-2 Specifications A.3 ELECTRICAL SPECIFICATIONS A.4 EN VIRONMENTAL REQUIREMENTS A.5 INPUT/OUTPUT P OR TS Line Input Range, V olts (V): 100–125 V ac 200–240 V ac Input Current, Amperes (A): 2.3 A 1.2 A Frequency , Hertz (Hz): 50/60 Hz 50/60 Hz Input Power , V olt Amperes (V A:) 250 V A 250 V A Operating T emperature: ...

  • Cabletron Systems 2H253-25R - page 51

    COM P or t Pinout Assignments Specifications A-3 A.6 COM P OR T PINOUT ASSIGNMENTS The COM port is a serial communications port that supports Local Management or connection to a UPS. T able A-1 shows the COM port pin assignments. A.7 REGULATORY COMPLIANCE This equipment meets the follo wing safety and electromagnetic compatibility (EMC) requiremen ...

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  • Cabletron Systems 2H253-25R - page 53

    Optional Installations and Mode Switch Bank Settings B-1 B Optional Installations and Mode Switch Bank Settings The top cov er must be removed to gain access to the mode bank switches, to install optional FLASH or DRAM Single In-line Memory Modules (SIMMs), or to install an optional High Speed Interface Module (HSIM) or V ery High Speed Interface M ...

  • Cabletron Systems 2H253-25R - page 54

    Removing the Chassis Co v er B-2 Optional Installations and Mode Switch Bank Settings B.2 REMOVING THE CHASSIS CO VER This section describes ho w to remov e the 2H253-25R chassis cover . DO NO T REMO VE THE CO VER FROM THE 2H253-25R WHILE PO WER IS APPLIED T O THE UNIT . HAZARDOUS V OL T A GES ARE PRESENT AND COULD CA USE PERSONAL INJUR Y AND/OR D ...

  • Cabletron Systems 2H253-25R - page 55

    Removing the Chassis Co v er Optional Installations and Mode Switch Bank Settings B-3 T o remove the chassis co ver , proceed as follows: 1. Disconnect the 2H253-25R from the network as follows: a. Unplug both power cords from the rear of the chassis. b. Disconnect all network cables attached to the 2H253-25R. 2. If the 2H253-25R is rack mounted, r ...

  • Cabletron Systems 2H253-25R - page 56

    Removing the Chassis Co v er B-4 Optional Installations and Mode Switch Bank Settings Figure B-1 Removing the Chassis Co ver 2504-30 Note: If the device was rack mounted, the four screws fastening the cover to the front panel are removed and installed along with the rackmount brackets. Chassis Front Panel Screws (4) Chassis Cover ...

  • Cabletron Systems 2H253-25R - page 57

    Setting the Mode Switches Optional Installations and Mode Switch Bank Settings B-5 B.3 SETTING THE MODE SWITCHES Figure B-2 sho ws the location of the mode switches and the switch settings for normal operation. These switches are set at the factory and rarely need to be changed. Switch definitions and positions are as follo ws: • Switches 1 thro ...

  • Cabletron Systems 2H253-25R - page 58

    SIMM Upgrade B-6 Optional Installations and Mode Switch Bank Settings DO NOT attempt a Forced BootP unless a BootP server has been configured for the 2H253-25R. The BootP server references the location of a station acting as a Trivial File Transfer Protocol (TFTP) server containing the 2H253-25R image file. When the position of Switch 6 is changed ...

  • Cabletron Systems 2H253-25R - page 59

    SIMM Upgrade Optional Installations and Mode Switch Bank Settings B-7 B.4.1 Locating SIMMs Figure B-3 sho ws the two locations of the DRAM SIMM connector . Figure B-3 SIMM Slot Locations B.4.2 Installing the DRAM SIMM T o install a DRAM SIMM, refer to Figure B-4 and proceed as follows: 1. With the SIMM alignment notch oriented as shown in Figure B- ...

  • Cabletron Systems 2H253-25R - page 60

    SIMM Upgrade B-8 Optional Installations and Mode Switch Bank Settings 2. Pivot the SIMM downward so the connector clips align with the two side notches of the SIMM and the connector clips lock the SIMM into place. Figure B-4 Installing the DRAM 1 2 SIMM Alignment Notch Clip Clip Connector T eeth Side Notch Side Notch Connector 2504-91 ...

  • Cabletron Systems 2H253-25R - page 61

    Installing Optional HSIM or VHSIM Interf ace Modules Optional Installations and Mode Switch Bank Settings B-9 B.5 INSTALLING OPTIONAL HSIM OR VHSIM INTERFACE MODULES Figure B-5 sho ws the location of the two connectors for an optional High HSIM or VHSIM. Depending on the HSIM or VHSIM installed, one or both connectors are used. Figure B-5 HSIM and ...

  • Cabletron Systems 2H253-25R - page 62

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  • Cabletron Systems 2H253-25R - page 63

    Index-1 Inde x Numerics 100BASE-T requirements 2-2 10BASE-T requirements 2-1 2H253-25R description of 1-1 front panel 1-1 802.1p Port Priority introduction to 1-6 A Auto-Negotiation introduction to 1-2 B Broadcast Suppression introduction to 1-4 C Cable specifications 100BASE-TX network 2-2 10BASE-T network 2-1 Chassis cover, removal of B-2 COM por ...

  • Cabletron Systems 2H253-25R - page 64

    Inde x Index-2 L LANVIEW LEDs 4-1 Local Management introduction to 1-6 M Management use of 1-6 Memory upgrading B-6 Mode Switch setting B-5 N Network connections 3-8 P Physical properties A-1 Port Redirect Function, introduction to 1-4 Power connection 3-7 R Redirect functions port and VLAN, introduction to 1-4 Regulatory Compliance A-3 Related man ...

Manufacturer Cabletron Systems Category Switch

Documents that we receive from a manufacturer of a Cabletron Systems 2H253-25R can be divided into several groups. They are, among others:
- Cabletron Systems technical drawings
- 2H253-25R manuals
- Cabletron Systems product data sheets
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All of them are important, but the most important information from the point of view of use of the device are in the user manual Cabletron Systems 2H253-25R.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Cabletron Systems 2H253-25R, service manual, brief instructions and user manuals Cabletron Systems 2H253-25R. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Cabletron Systems 2H253-25R.

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A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Cabletron Systems 2H253-25R by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Cabletron Systems 2H253-25R.

A complete Cabletron Systems manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Cabletron Systems 2H253-25R - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Cabletron Systems 2H253-25R, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Cabletron Systems 2H253-25R, that we can find in the current document
3. Tips how to use the basic functions of the device Cabletron Systems 2H253-25R - which should help us in our first steps of using Cabletron Systems 2H253-25R
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Cabletron Systems 2H253-25R
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Cabletron Systems 2H253-25R in a specific country, if it was not possible to solve the problem on our own.

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