Enterasys Matrix E1 1G694-13 Installation Manual
  1. Manuals
  2. Brands
  3. Enterasys Manuals
  4. Switch
  5. Matrix E1 1G694-13
  6. Installation manual
Enterasys Matrix E1 1G694-13 Installation Manual

Enterasys Matrix E1 1G694-13 Installation Manual

Enterasys matrix e1 1g694-13: install guide
Hide thumbs Also See for Matrix E1 1G694-13:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Configuration Manual
Matrix E1 1G694-13
Installation Guide
9033712-05

Advertisement

Table of Contents
loading

Related Manuals for Enterasys Matrix E1 1G694-13

Summary of Contents for Enterasys Matrix E1 1G694-13

  • Page 1 Matrix E1 1G694-13 Installation Guide 9033712-05...
  • Page 3 Enterasys Networks reserves the right to make changes in specifications and other information contained in this document and its web site without prior notice. The reader should in all cases consult Enterasys Networks to determine whether any such changes have been made.

  • Page 4: Regulatory Compliance Information

    This product complies with the following: UL 60950, CSA C22.2 No. 60950, 73/23/EEC, EN 60950, IEC 60950, EN 60825, 21 CFR 1040.10. El producto de Enterasys cumple con lo siguiente: UL 60950, CSA C22.2 No. 60950, 73/23/EEC, EN 60950, IEC 60950, EN 60825, 21 CFR 1040.10.
  • Page 5 EN 61000-3-3, EN 55024, AS/NZS CISPR 22, VCCI V-3. COMPATIBILIDAD ELECTROMÁGNETICA (EMC) Este producto de Enterasys cumple con lo siguiente: 47 CFR Partes 2 y 15, CSA C108.8, 89/336/EEC, EN 55022, EN 55024, EN 61000-3-2, EN 61000-3-3, AS/NZS CISPR 22, VCCI V-3.

  • Page 6: Declaration Of Conformity

    European Representative Address: Enterasys Networks, Ltd. Conformance to Directive(s)/Product Standards: EC Directive 89/336/EEC Equipment Type/Environment: Networking Equipment, for use in a Commercial Enterasys Networks, Inc. declares that the equipment packaged with this notice conforms to the above directives. SAFETY INFORMATION CLASS 1 LASER TRANSCEIVERS watts.
  • Page 7 CAREFULLY READ THIS LICENSE AGREEMENT. This document is an agreement (“Agreement”) between the end user (“You”) and Enterasys Networks, Inc. on behalf of itself and its Affiliates (as hereinafter defined) (“Enterasys”) that sets forth Your rights and obligations with respect to the Enterasys software program/firmware installed on the Enterasys product (including any accompanying documentation, hardware or media) (“Program”) in the package and prevails over any additional, conflicting or...
  • Page 8 52.227-19 (a) through (d) of the Commercial Computer Software-Restricted Rights Clause and its successors, and (iii) in all respects is proprietary data belonging to Enterasys and/or its suppliers. For Department of Defense units, the Program is considered commercial computer software in accordance with DFARS section 227.7202-3 and its successors, and use, duplication, or disclosure by the Government is subject to restrictions set forth herein.
  • Page 9 Enterasys and, accordingly, You hereby agree to maintain complete books, records and accounts showing (i) license fees due and paid, and (ii) the use, copying and deployment of the Program. You also grant to Enterasys and its authorized representatives, upon reasonable notice, the right to audit and examine during Your normal business hours,...

  • Page 11: Table Of Contents

    Installing an Optional Mini-GBIC ... 3-5 Installing an Optional XENPAK (10GBASE-LR) Module... 3-7 Tabletop or Shelf Installation... 3-9 Switch Configuration Using WebView... 1-3 Switch Configuration Using CLI Commands... 1-3 Removing the Front Panel Coverplate... 3-3 Installing an Ethernet Expansion Module... 3-4 Contents...
  • Page 12 A.5.1 A.5.2 A.5.3 A.5.4 A.5.5 RJ45 COM Port Pinout Assignments ...A-9 Regulatory Compliance...A-9 MODE SWITCH BANK SETTINGS Required Tools...B-1 Removing the Chassis Cover...B-2 Setting the Mode Switches...B-4 INDEX Contents Connecting Power... 3-12 Connecting Fiber Optic Cables to MT-RJ Ports... 3-13 Connecting Fiber Optic Cables to an SC Port ...

  • Page 13: Figures

    Figure Matrix E1 1G694-13 Standalone Switch ... 1-1 Optional Ethernet Expansion Modules ... 1-3 Removing the Front Panel Coverplate ... 3-3 Installing the Ethernet Expansion Module ... 3-4 Mini-GBIC Installation... 3-6 XENPAK Module Installation ... 3-8 Clearance Required for Tabletop or Shelf Installation... 3-9 Attaching the Rackmount Brackets ...
  • Page 14 Tables Table Optional Ethernet Expansion Module, Compliance, and Physical Connection ...1-3 Contents of Shipping Carton...3-2 LANVIEW LEDs ...4-3 Troubleshooting Checklist...4-5 1G694-13 Specifications... A-2 ZPIM1-01/ZPIM1-06 Port/Environmental Specifications... A-3 ZPIM1-01 Optical Specifications ... A-3 Port Input/Output Specifications ... A-4 10GBASE-LR Optical Specifications ... A-4 10GBASE-LR Operating Range ...

  • Page 15: About This Guide

    This guide provides an overview of the Matrix E1 1G694-13 standalone switch, and instructions to install the 1G694-13, an optional Ethernet expansion module, Mini-GBICs, and XENPAK modules. For information about the Command Line Interface (CLI) set of commands used to configure and manage the 1G694-13, refer to the Enterasys Networks™...

  • Page 16: Structure Of This Guide

    1G694-13 switch. Chapter 1, Introduction, provides an overview of the switch, and explains how to contact Enterasys Networks for technical support.

  • Page 17: How To Use This Guide

    Instructions to set the mode switches when necessary RELATED DOCUMENTS The following document provides the information to configure the switch using the Command Line Interface to set up and manage the switch: Matrix E1 1G694-13 Configuration Guide The manual listed above can be obtained from the World Wide Web in Adobe Acrobat Portable Document Format (PDF) at the following site: http://www.enterasys.com/support/manuals...

  • Page 18: Document Conventions

    Document Conventions DOCUMENT CONVENTIONS This guide uses the following conventions: Note: Calls the reader’s attention to any item of information that may be of special importance. Caution: Contains information essential to avoid damage to the equipment. Electrical Hazard: Warns against an action that could result in personal injury or death due to an electrical hazard.

  • Page 19: Introduction

    Enterasys Networks for support. Depending on the firmware version used in the switch, some features described in this document may not be supported. Refer to the Release Notes shipped with the switch to determine which features are supported.

  • Page 20: Connectivity

    Connectivity You can install the switch on a tabletop or into a standard 19-inch rack using the rack mounting hardware. The 1G694-13 has two power supplies. If one power supply fails, the remaining power supply assumes the entire load of the device without interruption to network traffic. Each power supply module has its own ac input connection and must be connected to different ac power circuits for power source redundancy.

  • Page 21: Management

    1.3.2 Switch Configuration Using CLI Commands The CLI commands enable you to perform more complete switch configuration management tasks. For information about the CLI command set, refer to the Matrix E1 1G694-13 Configuration Guide. Compliant to Physical Connection 10-Gigabit Ethernet...

  • Page 22: Standards Compatibility

    “loop” conditions. A full suite of Enterasys Networks Enterprise MIBs provide a wide array of statistical information to enhance troubleshooting. For information on how to extract and compile individual MIBs,...

  • Page 23: Getting Help

    • A description of any action(s) already taken to resolve the problem (for example, changing mode switches or rebooting the unit) • The serial and revision numbers of all involved Enterasys Networks products in the network • A description of your network environment (such as layout, cable type, other relevant environmental information) •...

  • Page 25: Network Requirements

    The network installation must meet the requirements to ensure satisfactory performance of this equipment. Failure to do so will produce poor network performance. Note: The Matrix E1 1G694-13 Configuration Guide and Cabling Guide, referred to in the following sections, can be found on the Enterasys Networks World Wide Web site: http://www.enterasys.com/support/manuals...

  • Page 26: 10-Gigabit Ethernet Network

    10 kilometers (6.2 miles) on a single mode fiber optic cable. The device at the other end of the fiber optic connection must be an Enterasys Networks product with a matching ZPIM1-01, or a standards compliant product with a 10GBASE-LR interface as appropriate.

  • Page 27: Hardware Installation

    Elektrischer Gefahrenhinweis: Installationen oder Servicearbeiten sollten nur durch ausgebildetes und qualifiziertes Personal vorgenommen werden. Note: Read the Release Notes shipped with the switch to check for any exceptions to the supported features and operation documented in this guide. This chapter provides the instructions required to install the 1G694-13. Follow the order of the sections as listed below to correctly install the switch.

  • Page 28: Unpacking The Switch

    3. Remove the tape seal on the non-conductive bag to remove the switch. 4. Perform a visual inspection of the device for any signs of physical damage. Contact Enterasys Networks if there are any signs of damage. Refer to INSTALLING OPTIONS Note: If you are installing the 1G694-13 in a rack, it is recommended that you install an optional Ethernet expansion module or Mini-GBIC in the 1G694-13 first.

  • Page 29: Installing An Optional Ethernet Expansion Module

    INSTALLING AN OPTIONAL ETHERNET EXPANSION MODULE Note: Install any optional equipment before proceeding to Installing an Ethernet expansion module involves the following: • Removing the front panel coverplate • Installing the Ethernet expansion module Caution: An antistatic wrist strap is required to perform the following procedures to minimize ESD damage to the devices involved.

  • Page 30: Installing An Ethernet Expansion Module

    Caution: Expansion modules are NOT hot-swappable. The switch must be powered down before an expansion module (ZPIM1-01 or ZPIM1-06) is installed or removed. Hot-swapping the expansion module while the switch is powered on could cause the device to stop forwarding frames.

  • Page 31: Installing An Optional Mini-Gbic

    Caution: Carefully follow the instructions in this manual to avoid damaging the Mini-GBIC and switch. The Mini-GBIC and switch are sensitive to static discharges. Use an antistatic wrist strap and observe all static precautions during this procedure. Failure to do so could result in damage to the Mini-GBIC and switch.

  • Page 32: Mini-Gbic Installation

    Caution: Do NOT remove a Mini-GBIC from a slot without releasing the locking tab located under the front bottom end of the Mini-GBIC The Mini-GBIC and switch are sensitive to static discharges. Use an antistatic wrist strap and observe all static precautions during this procedure. Failure to do so can result in damage to the Mini-GBIC and switch.

  • Page 33: Installing An Optional Xenpak (10Gbase-Lr) Module

    Caution: Carefully follow the instructions in this manual to avoid damaging the XENPAK module and switch. The XENPAK module and switch are sensitive to static discharges. Use an antistatic wrist strap and observe all static precautions during this procedure. Failure to do so could result in damage to the 10GBASE-LR and switch.
  • Page 34 Failure to do so can result in damage to the XENPAK module and switch. Always leave the XENPAK module in the antistatic bag or an equivalent antistatic container when not installed.

  • Page 35: Tabletop Or Shelf Installation

    2. Locate the four self-stick rubber pads shipped with your switch, then affix one near each corner of the switch. The rubber pads serve as rubber feet to protect the surface of the table or shelf. They also help prevent the switch from sliding out of place on the flat surface.

  • Page 36: Rackmount Installation

    Rackmount Installation RACKMOUNT INSTALLATION To install the switch in a 19-inch rack, an accessory kit containing the rackmount brackets, and mounting screws to attach the rackmount brackets are shipped with the switch. Guidelines for Rackmount Installation The installation site must be within reach of the network cabling and meet the requirements listed below: •...

  • Page 37: Attaching The Rackmount Brackets

    Installation Proceed as follows to install the switch into a 19-inch rack: 1. Attach the rackmount brackets ➁ 6 mm flathead screws Figure 3-6 Attaching the Rackmount Brackets ➀ Rackmount brackets 2. Position the switch between the rails of the 19-inch rack...

  • Page 38: Connecting Power

    3.8.1 Connecting Power Note: The two power supplies in the switch have automatic voltage sensing, which allows connection to power sources ranging from 100–125 Vac, 2.5 A or 200–240 Vac, 1.25 A, 50/60 Hz. To connect the switch to the power sources, refer to ➀...

  • Page 39: Connecting To The Network

    • Receive (RX) The transmit strand from a switch port connects to the receive port of a fiber optic Gigabit Ethernet device at the other end of the segment. The receive strand of the applicable MT-RJ port on the switch connects to the transmit port of the fiber optic Gigabit Ethernet device.

  • Page 40: Cable Connection To Mini-Gbic

    Connecting to the Network Caution: Do not touch the ends of the fiber optic strands, and do not let the ends come in contact with dust, dirt, or other contaminants. Contamination of cable ends causes problems in data transmissions. If the ends of the fiber optic strands become contaminated, use a canned duster to blow the surfaces clean.

  • Page 41: Connecting Fiber Optic Cables To An Sc Port

    The optional ZPIM1-01 and 10GBASE-LR have an SC style connector for a cable connection to a 10-Gigabit Ethernet network. Enterasys Networks offers fiber optic cables that use SC style connectors, which are keyed to ensure proper crossover of the transmit and receive fibers.
  • Page 42 Connecting to the Network Warning: Do not use optical instruments to view the laser output. The use of optical instruments to view laser output increases eye hazard. When viewing the output optical port, power must be removed from the network adapter. Advertencia: No se debe usar instrumentos opticos para ver la potencia laser.

  • Page 43: Sc Fiber Optic Cable Connection

    Check that the device at the other end of the link has power turned on and is compatible. b. Verify proper crossover of fiber strands between the port on the switch and the fiber optic device at the other end of the fiber optic link segment.

  • Page 44: Connecting To Console Port For Local Management

    This section describes how to install a UTP cable with RJ45 connectors and optional adapters to connect a PC, a VT series terminal, or a modem to an Enterasys Networks module to access Local Management. This section also provides the pinout assignments of the adapters.

  • Page 45: Connecting To An Ibm Or Compatible Device

    Transmit Bits Parity Stop Bit 5. When these parameters are set, the Local Management password screen will appear. Refer to the appropriate Matrix E1 1G694-13 Configuration Guide for further information. Figure 3-11 Connecting an IBM PC or Compatible à ➀...

  • Page 46: Connecting To A Vt Series Terminal

    Connecting to Console Port for Local Management 3.10.3 Connecting to a VT Series Terminal To connect a VT Series terminal to an Enterasys Networks switch Console port a UTP cable with RJ45 connectors and an optional RJ45-to-DB25 female adapter (PN 9372110), and proceed as follows: 1.

  • Page 47: Connecting To A Modem

    ➁ RJ45 Console Port 3.10.4 Connecting to a Modem To connect a modem to an Enterasys Networks switch Console port cable with RJ45 connectors and an optional RJ45-to-DB25 male adapter (PN 9372112), and proceed as follows: 1. Connect the RJ45 connector at one end of the cable Enterasys Networks switch.

  • Page 48: Connecting To A Modem

    Transmit Bits Parity Stop Bit 6. When these parameters are set, the Local Management password screen will display. Refer to the Matrix E1 1G694-13 Configuration Guide for further information. Figure 3-13 Connecting to a Modem Å ➀ UTP cable with RJ45 connector ➁...

  • Page 49: Adapter Wiring And Signal Assignments

    3.10.5 Adapter Wiring and Signal Assignments Console Port Adapter Wiring and Signal Diagram RJ45 VT Series Port Adapter Wiring and Signal Diagram RJ45 Connecting to Console Port for Local Management Conductor Blue Green Orange Yellow DB25 Conductor Blue Yellow Green Orange Signal Receive (RX)
  • Page 50 Connecting to Console Port for Local Management Modem Port Adapter Wiring and Signal Diagram RJ45 Conductor Blue Orange Green Yellow Gray 3-24 Hardware Installation DB25 Signal Transmit (TX) Data Carrier Detect (DCD) Receive Ground (GRD) Data Terminal Ready (DTR) Ring Indicator...

  • Page 51: Completing The Installation

    2. At the Password prompt, press Enter (Return). For details on how to configure the 1G694-13 using the command line interface, refer to the Matrix E1 1G694-13 Configuration Guide. The CLI commands enable you to initially set up and perform more involved switch management configurations.
  • Page 52 Completing the Installation 3-26 Hardware Installation...

  • Page 53: Troubleshooting

    This chapter provides information concerning the following: • Using LANVIEW (Section • Troubleshooting checklist • Using the Reset button (Section 4.1) (Section 4.2) 4.3) Troubleshooting Troubleshooting...

  • Page 54: Using Lanview

    Using LANVIEW USING LANVIEW The 1G694-13 switch uses the Enterasys Networks built-in visual diagnostic and status monitoring system called LANVIEW. The LANVIEW LEDs network status for diagnosing network problems. Figure 4-1 LANVIEW LEDs ➀ PWR LED ➁ CPU LED Table 4-1 describes the LED indications and the associated recommended actions.

  • Page 55: Lanview Leds

    Ensure that the switch has adequate power. 1. Ensure that the power cords are plugged in correctly and that there is power at the two power sources. 2. Contact Enterasys Networks for technical support. None. Contact Enterasys Networks for technical support.
  • Page 56 Solid. Diagnostic failure. Port TX No activity. Green Flashing or Solid. Indicates activity. Flashing rate indicates data rate. Solid. Diagnostic failure. Troubleshooting Recommended Action None. None. None. None. Contact Enterasys Networks for assistance. None. Contact Enterasys Networks for technical support.

  • Page 57: Troubleshooting Checklist

    Recommended Action Ensure that the switch was installed properly according to the installation instructions in Chapter 3, and that the switch has power. Refer to the Matrix E1 1G694-13 Configuration Guide for proper setup procedures. Refer to Appendix A pinouts.
  • Page 58 Clear NVRAM was set pressed. using CLI commands. Troubleshooting Recommended Action Refer to the Matrix E1 1G694-13 Configuration Guide for the IP address assignment procedure. Enable port. Refer to the Matrix E1 1G694-13 Configuration Guide for instructions to enable/disable ports.

  • Page 59: Using The Reset Button

    The Reset button shown in Caution: Pressing the Reset button resets the device, and all current switching being performed by the switch is halted. A network downtime of up to two minutes will result from this action for any devices connected to the switch.

  • Page 61: Specifications

    Input/output specifications for the 10GBASE-LR • Mini-GBIC input/output specifications • Gigabit Ethernet specifications • Console port pinout assignment • Regulatory compliance Enterasys Networks reserves the right to change the specifications at any time without notice. (Section A.1) (Section (Section A.4) (Section A.5) (Section A.6)

  • Page 62: A-1 1G694-13 Specifications

    1G694-13 Specifications 1G694-13 SPECIFICATIONS Table A-1 provides the I/O ports, processors and memory, physical, and environmental module specifications for the 1G694-13. Table A-1 1G694-13 Specifications Item Ports Ports 1 through 8 Ports 9 through 12 Port Interface Option Slot Processors/Memory Processors Dynamic Random Access Memory (DRAM)

  • Page 63: Zpim1-01/Zpim1-06, 10-Gigabit Port Interface Specifications

    ZPIM1-01/ZPIM1-06, 10-GIGABIT PORT INTERFACE SPECIFICATIONS As of the printing of this manual, two expansion modules (ZPIM1-01 and ZPIM1-06) were available from Enterasys Networks. Warning: The ZPIM1-01 uses Class 1 lasers. Do not use optical instruments to view the laser output. The use of optical instruments to view laser output increases eye hazard. When viewing the output optical port, power must be removed from the network adapter.

  • Page 64: Input/Output Specifications For The 10Gbase-Lr

    Input/Output Specifications for the 10GBASE-LR INPUT/OUTPUT SPECIFICATIONS FOR THE 10GBASE-LR The ZPIM1-06 option slot supports XENPAK 10-Gigabit Ethernet (GbE) standard (802.3ae) interface plug-in modules. These modules are hot swappable. the specifications for the 10GBASE-LR module, which is the only module available as of the printing of this manual.

  • Page 65: Mini-Gbic Input/Output Specifications

    MINI-GBIC INPUT/OUTPUT SPECIFICATIONS The Mini-Gigabit Ethernet Card (Mini-GBIC) port interface slots can support 1-Gbps fiber-optic and copper connections as described in Table A-7 Mini-GBIC Input/Output Port Specifications Item Specification MGBIC-LC01 Provides one LC fiber-optic multimode port that is compliant with the 1000BASE-SX standard LC connector.

  • Page 66: Mgbic-Lc03 Specifications (1000Base-Sx

    Gigabit Ethernet Specifications Table A-9 MGBIC-LC01 / MGBIC-MT01 Operating Range Item 62.5 µm MMF 62.5 µm MMF 50 µm MMF 50 µm MMF A.5.2 MGBIC-LC03 Specifications (1000BASE-SX) Table A-10 MGBIC-LC03 Optical Specifications Item Transmit Power (minimum) Transmit Power (maximum) Receive Sensitivity Link Power Budget (Multimode Only) 1.

  • Page 67: Mgbic-Lc09 Specifications (1000Base-Lx

    A.5.3 MGBIC-LC09 Specifications (1000BASE-LX) Table A-12 MGBIC-LC09 Optical Specifications Item Transmit Power (minimum) Receive Sensitivity Link Power Budget Table A-13 MGBIC-LC09 Operating Range Item 62.5 µm MMF 50 µm MMF 50 µm MMF 10 µm SMF A.5.4 MGBIC-08 Specifications (1000BASE-ELX) Table A-14 MGBIC-08 Optical Specifications Item Transmit Power (minimum)

  • Page 68: Mgbic-02 Specifications (1000Base-T

    Gigabit Ethernet Specifications Table A-15 MGBIC-08 Operating Range Item 9 or 10 µm SMF A.5.5 MGBIC-02 Specifications (1000BASE-T) Table A-16 MGBIC-02 / Specifications Item Supported Cable Type: Maximum Length Connector Data Rate TX Output impedance RX Input impedance Specifications 1550 nm Specification Copper, Category 5 UTP Up to 100 meters...

  • Page 69: Rj45 Com Port Pinout Assignments

    RJ45 COM PORT PINOUT ASSIGNMENTS The COM port is a serial communications port that supports Local Management. the COM port pin assignments. Table A-17 Console Port Pin Assignments Signal Name Transmit Data (XMT) Clear to Send (CTS) Data Set Ready (DSR) Receive Data (RCV) Signal Ground (GND) Request to Send (RTS)
  • Page 70 Regulatory Compliance A-10 Specifications...

  • Page 71: Mode Switch Bank Settings

    Locations, functions, and settings for the mode switches REQUIRED TOOLS Use the following tools to perform the procedures provided in this appendix: • Antistatic wrist strap • Phillips screwdriver Mode Switch Bank Settings B.1) (Section B.2) (Section B.3) Mode Switch Bank Settings...

  • Page 72: Removing The Chassis Cover

    Riesgo Electrico: Apague el 1G694-13 desenchufe el cable de la unidad. Elektrischer Gefahrenhinweis: Am hinten des 1G694-13 stechei abziehen um aus zu schalten. Tip: Before performing step b, mark the cables connected to the switch according to their associated port numbers. This is recommended for ease of reinstallation.

  • Page 73: B-1 Removing The Chassis Cover

    To reinstall the chassis cover, perform the removal procedures in reverse. Figure B-1 Removing the Chassis Cover À Á Â ➀ ➁ ➂ Cover Screws (6) Cover Chassis Mode Switch Bank Settings...

  • Page 74: Setting The Mode Switches

    SETTING THE MODE SWITCHES Figure B-2 shows 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 follows: •...
  • Page 75 Switch 7 – Clear NVRAM. Changing the position of this switch resets NVRAM on the next power-up of the device. All user-entered parameters, such as the IP address, device names, etc., are reset to the factory default settings. Once the switch resets, you can either use the factory default settings or reenter your own parameters.
  • Page 77 10-Gigabit Ethernet port introduction to 1G694-13 overview of the unpacking of the 1-Gigabit Ethernet introduction to Accessing mode switch bank Cable Fiber Budget Fiber budget Cable specifications 1000BASE-SX/LX network Chassis cover removal of CLI commands introduction to...
  • Page 78 Management use of MGBIC-08 specifications for Mini-GBIC installation of specifications for A-4, Mode Switch setting of Mode Switch Bank Settings MT-RJ Ports connecting fiber optic cables to Notices General Options installation of introduction to Port RX LED function of...
  • Page 79 XENPAK module installing ZPIM1-01 compliance & physical condition connecting to network 3-15 installing ZPIM1-06 compliance & physical condition connecting to network 3-15 installing Index-3...

Table of Contents