Microsens MS453526M Hardware Manual

Gigabit Ethernet Switch

Hardware Manual

MS453526M

Release 6.54

May, 2016

Gigabit Ethernet Switch – Hardware Manual Page 2 of 36 ________________________________________________________________

ABOUT THIS GUIDE

PURPOSE This guide gives specific information on how to operate and

use the management functions of the switch.

AUDIENCE The guide is intended for use by network administrators who

are responsible for operating and maintaining network equipment; consequently, it assumes a basic working knowledge of general switch functions, the Internet Protocol (IP), and Simple Network Management Protocol (SNMP).

CONVENTIONS The following conventions are used throughout this guide to

show information:

NOTE: Emphasizes important information or calls your

attention to related features or instructions.

WARNING:

Alerts you to a potential hazard that could

cause personal injury.

CAUTION:

Alerts you to a potential hazard that could

cause loss of data, or damage the system or equipment.

Gigabit Ethernet Switch – Hardware Manual Page 3 of 36 _______________________________________________________________

COMPLIANCES AND SAFETY STATEMENTS

CE MARK

DECLARATION

OF CONFORMANCE

FOR EMI AND

SAFETY (EEC)

This equipment has been tested and found to comply with the

protection requirements of European Emission Standard

EN55022/EN61000-3 and the Generic European Immunity

Standard EN55024.

EMC

EN55022(2006)+A1:2007/CISPR

22:2006+A1:2006

Class A

4kV CD, 8kV, AD

IEC61000-4-2 (2001)

3V/m

IEC61000-4-3( 2002)

1kV – (power line), 0.5kV – (signal line)

IEC61000-4-4(2004)

Line to Line: 1kV, Line to Earth: 2kV

IEC61000-4-5 (2001)

130dBuV(3V) Level 2

IEC61000-4-6 (2003)

1A/m

IEC61000-4-8 (2001)

Voltage dips:

>95%, 0.5 period, 30%, 25 periods

IEC61000-4-11(2001)

Voltage interruptions:

>95%, 250 periods

CAUTION:

Circuit devices are sensitive to static electricity,

which can damage their delicate electronics. Dry weather

conditions or walking across a carpeted floor may cause you to

acquire a static electrical charge.

To protect your device, always:

 Touch the metal chassis of your computer to ground the

static electrical charge before you pick up the circuit device.

 Pick up the device by holding it on the left and right edges

only.

Gigabit Ethernet Switch – Hardware Manual Page 4 of 36 ________________________________________________________________

 If you need using outdoor device connect to this device with

cable then you need to addition an arrester on the cable

between outdoor device and this device.

Fig. Addition an arrester between outdoor device and

this switch

NOTE: The switch is indoor device; if it will be used in

outdoor environment or connects with some outdoor device,

then it must use a lightning arrester to protect the switch

WARNING:

 Self-demolition on Product is strictly prohibited. Damage

caused by self-demolition will be charged for repairing fees.

 Do not place product at outdoor or sandstorm.  Before installation, please make sure input power supply

and product specifications are compatible to each other.

 To reduce the risk of electric shock. Disconnect all AC or

DC power cord and RPS cables to completely remove power from the unit.

 Before importing / exporting configuration please make

sure the firmware version is always the same.

 After firmware upgrade, the switch will remove the

configuration automatically to latest firmware version.

The following publication gives specific information on how to operate and use the management functions of the switch:

- The Software Manual

- The CLI Manual

Gigabit Ethernet Switch – Hardware Manual Page 5 of 36 _______________________________________________________________

Contents

ABOUT THIS GUIDE ........................................................................................................ 2

COMPLIANCES AND SAFETY STATEMENTS ....................................................... 3

INTRODUCTION ................................................................................................................ 7

OVERVIEW .................................................................................................................................... 7

DESCRIPTION OF HARDWARE ................................................................................. 9

NETWORK PLANNING ................................................................................................. 10

INTRODUCTION TO SWITCHING................................................................................... 10

APPLICATION EXAMPLES .................................................................................................. 10

INSTALLING THE SWITCH ........................................................................................ 11

SELECTING A SITE .................................................................................................................. 11

ETHERNET CABLING .............................................................................................................. 11

EQUIPMENT CHECKLIST ..................................................................................................... 12

PACKAGE CONTENTS ............................................................................................................ 12

MOUNTING ................................................................................................................................. 12

INSTALLING AN OPTIONAL SFP TRANSCEIVER ................................................... 15

CONNECTING TO A POWER SOURCE ........................................................................... 17

CONNECTING TO THE CONSOLE PORT ....................................................................... 17

Operation of Web-based Management ............................................................. 19

MAKING NETWORK CONNECTIONS .................................................................... 20

CONNECTING NETWORK DEVICES ............................................................................... 20

TWISTED-PAIR DEVICES ................................................................................................... 20

FIBER OPTIC SFP DEVICES ............................................................................................... 22

CABLE LABELING AND CONNECTION RECORDS ....................................... 24

TROUBLESHOOTING..................................................................................................... 25

Basic Troubleshooting Tips .............................................................................................. 25

POWER AND COOLING PROBLEMS ...................................................................... 27

Installation ................................................................................................................................ 27

IN-BAND ACCESS .................................................................................................................... 27

Gigabit Ethernet Switch – Hardware Manual Page 6 of 36 ________________________________________________________________

CABLES ................................................................................................................................. 28

TWISTED-PAIR CABLE AND PIN ASSIGNMENTS ................................................. 28

STRAIGHT- THROUGH WIRING ...................................................................................... 29

1000BASE-T PIN ASSIGNMENTS ................................................................................... 30

CABLE TESTING FOR EXISTING CATEGORY 5 CABLE ........................................ 30

FIBER STANDARDS ................................................................................................................ 31

SPECIFICATIONS ........................................................................................................... 32

PHYSICAL CHARACTERISTICS ........................................................................................ 32

SWITCH FEATURES ................................................................................................................ 32

MANAGEMENT FEATURES .................................................................................................. 33

STANDARDS ............................................................................................................................... 33

COMPLIANCES .......................................................................................................................... 33

COMPLIANCES ................................................................................................................. 34

Gigabit Ethernet Switch – Hardware Manual Page 7 of 36 _______________________________________________________________

INTRODUCTION

OVERVIEW The MS453526M is an affordable managed switch that

provides a reliable infrastructure for your business network.

This switch deliver more intelligent features you need to

improve the availability of your critical business applications, protect your sensitive information, and optimize your network

bandwidth to deliver information and applications more effectively. Easy to set up and use, it provides the ideal

combination of affordability and capabilities for entry level

Networking includes Small Business or enterprise application and helps you create a more efficient, better-connected

workforce.

Front of the Switches

Back of the Switches

System LED

Mode LED

Mode/ Reset

Button

Console Port

10/100/1000 Base-T RJ-45 Port

100/1000 RJ45/

SFP Combo Port

AC Power Socket

Gigabit Ethernet Switch – Hardware Manual Page 8 of 36 _______________________________________________________________

SWITCH

ARCHITECTURE

The switch performs a wire-speed, non-blocking switching fabric.

This allows wire-speed transport of multiple packets at low

latency on all ports simultaneously. The switch also features

full-duplex capability on all ports, which effectively doubles the

bandwidth of each connection.

This switch uses store-and-forward technology to ensure

maximum data integrity. With this technology, the entire packet

must be received into a buffer and checked for validity before

being forwarded. This prevents errors from being propagated

throughout the network.

NETWORK

MANAGEMENT

OPTIONS

The switch can also be managed over the network with a web

browser or Telnet application. The switch includes a built-in

network management agent that allows it to be managed in-

band using SNMP or RMON (Groups 1, 2, 3, 9) protocols. It also

has an RJ45 console port connector on the front panel for out-

of-band management. A PC may be connected to this port for

configuration and monitoring out-of-band via a serial cable.

NOTE: For a detailed description of the management

features, refer to the software manual.

Gigabit Ethernet Switch – Hardware Manual Page 9 of 36 _______________________________________________________________

DESCRIPTION OF HARDWARE

1000BASE-T PORTS

The switch contains ten 1000BASE-T RJ-45 ports. All RJ-45 ports support automatic MDI/MDI-X operation, auto-negotiation

and IEEE 802.3x auto-negotiation of flow control, so the

optimum data rate and transmission is selected automatically.

SFP TRANSCEIVER

SLOTS

MS453526M supports the Small Form Factor Pluggable (SFP)

transceiver slots are port 9 and 10. In the default configuration,

if an SFP transceiver (purchased separately) is installed in a slot

and has a valid link on the port, the associated RJ-45 port is

disabled.

PORT AND SYSTEM STATUS LEDS

The MS453526M switch includes a display panel for system and port indications that simplify installation and network

troubleshooting. The LEDs, which are located on left hand side of the front panel for easy viewing. Details are shown below and

described in the following tables.

Mode Status LEDs

LED

Condition

Status

Link/ACT/Speed

Green

Lit Green indicates all LED of each port are in Link/ACT/Speed mode.

System Status LED

SYSTEM LED

Condition

Status

Power

Green OFF

Lit when power is coming up

Gigabit Ethernet Switch – Hardware Manual Page 10 of 36 _______________________________________________________________

NETWORK PLANNING

INTRODUCTION TO SWITCHING

A network switch allows simultaneous transmission of multiple

packets; it can partition a network more efficiently than bridges or routers. Therefore the switch has been recognized as one of

the most important devices for today’s networking technology.

When performance bottlenecks are caused by congestion at the

network access point such as file server, the device can be connected directly to a switched port. In addition, by using full-

duplex mode, the bandwidth of the dedicated segment can be doubled to maximize throughput.

When networks are based on repeater (hub) technology, the distance between end stations is limited by a maximum hop

count. However, a switch can subdividing the network into smaller and more manageable segments, and linking them to

the larger network than it turns the hop count back to zero and

removes the limitation.

A switch can be easily configured in any Ethernet, Fast Ethernet, or Gigabit Ethernet network to significantly increase bandwidth

while using conventional cabling and network cards.

APPLICATION EXAMPLES

The MS453526M Switch implements 8 Gigabit Ethernet TP ports with auto MDIX and 2 slots for the removable SFP module which

supports comprehensive types of fiber connection, such as LC and BiDi-LC modules. It is not only designed to segment your

network, but also to provide a wide range of options in setting

up network connections. Some typical applications are described below.

The switch is suitable for the following applications.

 Remote site application is used in Enterprise or SMB

 Peer-to-peer application is used in two remote offices

 Office network

 High Performance Requirement environment

 Advance Security for network safety application

 Suitable for data/ voice and video conference application

Gigabit Ethernet Switch – Hardware Manual Page 11 of 36 _______________________________________________________________

INSTALLING THE SWITCH

SELECTING A SITE The switch can be mounted in a standard 19-inch equipment

rack (Via Optional Rack mount Kit) or on a flat surface. Be

sure to follow the guidelines below when choosing a location.

◆

The site should:

 Be at the center of all the devices you want to link and

near a power outlet.

 Be able to maintain its temperature within 0 to 45°C

and its humidity within 10% to 90%, non-condensing.

 Be accessible for installing, cabling and maintaining

the devices.

 Allow the status LEDs to be clearly visible.

◆

Make sure the twisted-pair Ethernet cable is always routed

away from power lines, radios, transmitters or any other electrical interference.

◆

Make sure that the switch MS453526M is connected to a separate grounded power outlet that provides 100 to 240

VAC, 50 to 60 Hz.

ETHERNET CABLING To ensure proper operation when installing the switch into a

network, make sure that the current cables are suitable for 100BASE-TX or 1000BASE-T operation. Check the following

criteria against the current installation of your network:

◆

Cable type: Unshielded twisted pair (UTP) or shielded twisted pair (STP) cable with RJ-45 connectors; Category 5

or Category 5e with maximum length of 100 meters is recommend 100BASE-TX, and Category 5e or 6 with

maximum length of 100 meters is recommend for

1000BASE-T.

◆

Protection from radio frequency interference emissions.

◆

Electrical surge suppression.

◆

Separation of electrical wires and data based network wiring.

◆

Safe connections with no damaged cables, connectors or

shields.

Gigabit Ethernet Switch – Hardware Manual Page 12 of 36 _______________________________________________________________

RJ-45 Connections

SFP Transceiver

EQUIPMENT CHECKLIST

After unpacking this switch, please check the contents to be

sure you have received all the components. Then, before beginning the installation, be sure you have all other necessary

installation equipment.

PACKAGE CONTENTS

 MS453526M 10 port GbE switch  Four adhesive rubber feet  Mounting accessory (for 19” rack shelf, optional)  User’s manual CD  AC power cord  RJ-45 console cable

NOTE: Please notify your sales representative immediately if

any of the aforementioned items is missing or damaged.

WARNING:

The mini-GBICs are Class 1 laser devices. Avoid

direct eye exposure to the beam coming from the transmit port.

MOUNTING The switch can be mounted in a standard 19-inch equipment

rack or on a desktop or shelf. Mounting instructions for each

type of site as follow.

RACK MOUNTING Before rack mounting the switch, please pay attention to the

following factors:

 Temperature: Since the temperature within a rack assembly

may be higher than the ambient room temperature, check

that the rack-environment temperature is within the specified operating temperature range (0 to 45 °C).

 Mechanical Loading: Do not place any equipment on top of

a rack-mounted unit.

 Circuit overloading: Be sure that the supply circuit to the

rack assembly is not overloaded.

 Grounding: Rack-mounted equipment should be properly

Gigabit Ethernet Switch – Hardware Manual Page 13 of 36 _______________________________________________________________

grounded.

TO Rack-mount Devices:

Step1. Attach the brackets to the device using the screws provided in the Mounting

Accessory.

Attaching the Brackets

Step2. Mount the device in the rack (Via Optional Rack-Mount kit), using four rack-

mounting screws (not provided). Be sure to secure the lower rack-mounting

screws first to prevent the brackets being bent by the weight of the switch.

Installing the switch in a Rack

Gigabit Ethernet Switch – Hardware Manual Page 14 of 36 _______________________________________________________________

Step3. If installing a single switch only, turn to “Connection to a Power Source” at the

end of this chapter.

Step4. If installing multiple switches, mount them in the rack, one below the other, in

any order.

Gigabit Ethernet Switch – Hardware Manual Page 15 of 36 _______________________________________________________________

DESKTOP OR SHELF MOUNTING:

Step1. Attach the four adhesive rubber feet to the bottom of the first switch.

Step2. Set the device on a flat surface near an AC power source, making sure there

are at least two inches of space on all sides for proper airflow.

Step3. If installing a single switch only, go to “Connecting to a Power Source” at the

end of this chapter.

Step4. If installing multiple switches, attach four adhesive feet to each one. Place each

device squarely on top of the one below, in any order.

INSTALLING AN OPTIONAL SFP TRANSCEIVER

You can install or remove a SFP without having to power off the switch.

NOTE:

 The SFP slots are shared with the two 10/ 100/

1000Base-T RJ-45 ports. If a SFP is installed in a slot,

the associated RJ-45 port is disabled and cannot be used.

 The SFP ports operate only at full duplex. Half-duplex

operation is not supported.

 Ensure the network cable is NOT connected when you

install or remove a SFP.

Gigabit Ethernet Switch – Hardware Manual Page 16 of 36 _______________________________________________________________

Inserting an SFP Transceiver into a Slot

TO Install a SFP transceiver, do the following:

Step1. Consider network and cabling requirements to select an appropriate SFP

transceiver type.

Step2. Insert the transceiver with the optical connector facing outward and the slot

connector facing down. Note that SFP transceivers are keyed so they can only

be installed in one orientation.

Gigabit Ethernet Switch – Hardware Manual Page 17 of 36 _______________________________________________________________

Step3. Slide the SFP transceiver into the slot until it clicks into place.

NOTE: SFP transceivers are not provided in the switch

package.

CONNECTING TO A POWER SOURCE

You can plug or remove power cord from AC power socket, to

switch the power on and off.

Inserting the Power Cord to AC Power Socket

Step1. Insert the power cable plug directly into the AC Socket located at the back of

the switch.

Step2. Plug the other end of the cable into a grounded, 3-Pin, AC power source.

Step3. Check the front-panel LEDs as the device is powered on to be sure the POWER

LED is lit. If not, check that the power cable is correctly plugged in.

WARNING:

For International use, you may need to change the

AC line cord. You must use a line cord set that has been

approved for the socket type in your country.

CONNECTING TO THE CONSOLE PORT

The RJ-45 serial port on the switch’s front panel is used to

connect to the switch for out-of-band console configuration. The

command-line-driven configuration program can be accessed

from a terminal or a PC running a terminal emulation program.

The pin assignments used to connect to the serial port are

provided in the following table

Gigabit Ethernet Switch – Hardware Manual Page 18 of 36 _______________________________________________________________

Serial Port (RJ-45) Pin-Out

WIRING MAP FOR SERIAL CABLE

Serial Cable Wiring

Switch’s 8-Pin Serial

Port

Null Modem

PC’s 9-Pin DTE Port

6 RXD (receive data)

-----------------

3 TXD (transmit data)

-----------------

2 RXD (receive data)

5 SGND (Signal ground)

-------------------

5 SGND (Signal ground)

NOTE: No other pins are used.

Plug in the Console Port

The serial port’s configuration requirements are

as follows:

◆

Default Baud rate—115,200 bps

◆

Character Size—8 Characters

◆

Parity—None

◆

Stop bit—One

◆

Data bits—8

◆

Flow control—none

2 TXD

5 GND

3 RXD

Gigabit Ethernet Switch – Hardware Manual Page 19 of 36 _______________________________________________________________

Operation of Web-based Management

The default values of the switch are listed in the table below:

IP Address

192.168.1.1

Subnet Mask

255.255.255.0

Default Gateway

192.168.1.254

Username

admin

Password

admin

To access the web management enter the default IP address in web browser and hit enter.

Once you have entered the IP address into the web browser you will be prompted to enter a Username and Password in order to access the web management interface. Enter the default values as shown in the table above.

NOTE: F o r fu l l c o n f i g u r a ti o n d e t a i l s pl e ase refer to

the Software Manual

Gigabit Ethernet Switch – Hardware Manual Page 20 of 36 _______________________________________________________________

MAKING NETWORK CONNECTIONS

CONNECTING NETWORK DEVICES

The switch is designed to be connected to 10, 100 or 1000Mbps network cards in PCs and servers, as well as to other switches and hubs. It may also be connected to remote devices using optional SFP transceivers.

TWISTED-PAIR DEVICES

Each device requires an unshielded twisted-pair (UTP) cable with RJ-45 connectors at both ends. Use category 5, 5e or 6 cables for 1000BASE-T connections, category 5 or better for 100BASE-TX connections.

CABLING GUIDELINES

The RJ-45 ports on the switch support automatic MDI/MDI-X pinout configuration, so you can use standard straight-through twisted-pair cables to connect to any other network device (PCs, servers, switches, routers, or hubs).

CAUTION:

Do not plug a phone jack connector into an

RJ-45 port. This will damage the switch.

CONNECTING TO PCS, SERVERS, HUBS AND SWITCHES

Step1. Attach one end of a twisted-pair cable segment to the device’s RJ-45

connector.

Making Twisted-Pair Connections

Gigabit Ethernet Switch – Hardware Manual Page 21 of 36 _______________________________________________________________

Step2. If the device is a network card and the switch is in the wiring closet, attach the

other end of the cable segment to a modular wall outlet that is connected to

the wiring closet. (See the section “Network Wiring Connections.”) Otherwise,

attach the other end to an available port on the switch.

Make sure each twisted pair cable does not exceed 100 meters (328 ft) in length.

Step3. As each connection is made, the Link LED (on the switch) corresponding to

each port will light green (1000 Mbps) or amber (100 Mbps) to indicate that the connection is valid.

NETWORK WIRING CONNECTIONS

Today, the punch-down block is an integral part of many of the newer equipment racks. It is actually part of the patch panel. Instructions for making connections in the wiring closet with this type of equipment follows.

Step1. Attach one end of a patch cable to an available port on the switch, and the

other end to the patch panel.

Step2. If not already in place, attach one end of a cable segment to the back of the

patch panel where the punch-down block is located, and the other end to a modular wall outlet.

Step3. Label the cables to simplify future troubleshooting. See “Cable Labeling and

Connection Records”.

Network Wiring Connections

Switch

Equipment Rack (side view)

Patch Panel

Patch-Down Block

Wall

Gigabit Ethernet Switch – Hardware Manual Page 22 of 36 _______________________________________________________________

FIBER OPTIC SFP DEVICES

An optional Gigabit SFP transceiver can be used for a backbone connection between switches, or for connecting to a high-speed server.

Each single-mode fiber port requires 9/125 micron single-mode fiber optic cable with an LC connector at both ends. Each multimode fiber optic port requires 50/125 or 62.5/125 micron multimode fiber optic cabling with an LC connector at both ends.

WARNING:

This switch uses lasers to transmit signals over fiber optic cable. The lasers are inherently eye safe in normal operation. However, user should never look directly at a transmit port when it is powered on.

WARNING:

When selecting a fiber SFP device, considering safety, please make sure that it can function at a temperature that is not less than the recommended maximum operational temperature of the product. You must also use an approved Laser SFP transceiver.

Step1. Remove and keep the LC port’s rubber plug. When not connected to a

fiber cable, the rubber plug should be replaced to protect the optics.

Step2. Check that the fiber terminators are clean. You can clean the cable plugs

by wiping them gently with a clean tissue or cotton ball moistened with a little ethanol. Dirty fiber terminators on fiber optic cables will impair the quality of the light transmitted through the cable and lead to degraded performance on the port.

Step3. Connect one end of the cable to the LC port on the switch and the other

end to the LC port on the other device. Since LC connectors are keyed, the cable can be attached in only one orientation.

Step4. As a connection is made, check the Link LED on the switch corresponding

to the port to be sure that the connection is valid.

The fiber optic ports operate at 1 Gbps. The maximum length for fiber optic cable

operating at Gigabit speed will depend on the fiber type as listed under “1000

Mbps Gigabit Ethernet Collision Domain”.

Gigabit Ethernet Switch – Hardware Manual Page 23 of 36 _______________________________________________________________

CONNECTIVITY RULES

When adding hubs to your network, please note that because switches break up the path for connected devices into separate collision domains, you should not include the switch or connected cabling in your calculations for cascade length involving other devices.

1000BASE-T CABLE REQUIREMENTS

All Category 5 UTP cables that are used for 100BASE-TX connections should also work for 1000BASE-T, providing that all four-wire pairs are connected. However, it is recommended that for all critical connections, or any new cable installations, Category 5e or Category 6 cable should be used. The Category 5e and 6 specifications include test parameters that are only recommendations for Category 5. Therefore, the first step in preparing existing Category 5 cabling for running 1000BASE-T is a simple test of the cable installation to be sure that it complies with the IEEE 802.3-2005 standards

1000 MBPS GIGABIT ETHERNET COLLISION DOMAIN

Maximum 1000BASE-T Gigabit Ethernet Cable Length

Cable Type

Maximum Cable Length

Connector

Category 5, 5e or 6 100-ohm UTP or STP

100.m (328 ft)

RJ-45

Table 6: Maximum 1000BASE-SX Gigabit Fiber Cable Lengths

Fiber Size

Fiber Bandwidth

Maximum Cable Length

Connector

62.5/125 micron multimode fiber

160 MHz/km 200 MHz/km

220 m (722 ft) 275 m (902 ft)

LC LC

50/125 micron multimode fiber

400 MHz/km 500 MHz/km

500 m (1641 ft) 550 m (1805 ft)

LC LC

Single Mode SFP Transceivers

Refer to the transceiver’s data sheet.

100 MBPS FAST ETHERNET COLLISION DOMAIN

Maximum Fast Ethernet Cable Lengths

Cable Type

Maximum Cable Length

Connector

Category 5, 5e or 6 100-ohm UTP or STP

100.m (328 ft)

RJ-45

Gigabit Ethernet Switch – Hardware Manual Page 24 of 36 _______________________________________________________________

CABLE LABELING AND CONNECTION RECORDS

When planning a network installation, it is essential to label the opposing ends of cables and to record where each cable is connected. This will allow user to easily locate inter connected devices, isolate faults and change your topology without need for unnecessary time consumption.

To manage the physical implementations of your network, follow these guidelines:

◆

Clearly label the opposing ends of each cable.

◆

Using your building’s floor plans, draw a map of the location of all networkconnected equipment. For each piece of equipment, identify the devices to which it is connected.

◆

Note the length of each cable and the maximum cable length supported by the switch ports.

◆

For ease of understanding, use a location-based key when assigning prefixes to your cable labeling.

◆

Use sequential numbers for cables that originate from the same equipment.

◆

Differentiate between racks by naming accordingly.

◆

Label each separate piece of equipment.

◆

Display a copy of your equipment map, including keys to all abbreviations at each equipment rack.

Gigabit Ethernet Switch – Hardware Manual Page 25 of 36 _______________________________________________________________

A

TROUBLESHOOTING

Basic Troubleshooting Tips

Most problems are caused by the following situations. Check for these items first when starting your troubleshooting:

 Connecting to devices that have a fixed full-

duplex configuration.

The RJ-45 ports are configured as “Auto”. That is, when connecting to attach devices, the switch will operate in one of two ways to determine the link speed and the communication mode (half duplex or full duplex):

◆

If the connected device is also configured to Auto, the switch will automatically negotiate both link speed and communication mode.

◆

If the connected device has a fixed configuration, for example 100Mbps, at half or full duplex, the switch will automatically sense the link speed, but will default to a communication mode of half-duplex.

Because the MS453526M Switch devices behave in this way (in compliance with the IEEE802.3 standard), if a device connected to the switch has a fixed configuration at full duplex, the device will not connect correctly to the switch. The result will be high error rates and very inefficient communications between the switch and the device.

 Faulty or loose cables. Look for loose or obviously

faulty connections. If they appear to be OK, make sure the connections are snug. If that does not correct the problem, try a different cable.

 Non-standard cables. Non-standard and wrongly

wired cables may cause network collisions and other network problems, and can seriously impair network performance. Use a new correctly wired cable. For pinouts and correct cable wiring. A category 5 cable tester is a recommended tool for every 100Base-TX and 1000Base-T network installation.

 Improper Network Topologies. It is important to

make sure you have a valid network topology. If you no longer experience the problems, the new topology is probably at fault. In addition, you should make sure that your network topology contains no data path

loops

Gigabit Ethernet Switch – Hardware Manual Page 26 of 36 _______________________________________________________________

 Check the port

configuration.

A port on your switch may not be operating as you expect because it has been put into a “blocking” state by Spanning Tree, GVRP (automatic VLANs), or LACP (automatic trunking). (Note that the normal operation of the Spanning Tree, GVRP, and LACP features may put the port in a blocking state.) Alternatively, the port just may have been configured as disabled through software.

Troubleshooting Chart

Symptom

Action

POWER LED is Off

◆

Check connections between the switch, the power cord and the wall outlet.

◆

Contact your dealer for assistance.

Link LED is Off

◆

Verify that the switch and attached device are powered on.

◆

Be sure the cable is plugged into the switch and corresponding device.

◆

If the switch is installed in a rack, check the connections to the punch-down block and patch panel.

◆

Verify that the proper cable types is used and its length does not exceed specified limits.

◆

Check the adapter on the attached device and cable connections for possible defects. Replace the defective adapter or cable if necessary.

Gigabit Ethernet Switch – Hardware Manual Page 27 of 36 _______________________________________________________________

POWER AND COOLING PROBLEMS

Installation If the power indicator does not turn on when the power

cord is plugged in, you may have a problem with the power outlet, power cord, or internal power supply. However, if the unit powers off after running for a while, check for loose power connections, power losses or surges at the power outlet. If you still cannot isolate the problem, the internal power supply may be defective. Verify that all system components have been properly installed. If one or more components appear to be malfunctioning (such as the power cord or network cabling), test them in an alternate environment where you are sure that all the other components are functioning properly.

IN-BAND ACCESS You can access the management agent in the switch from

anywhere within the attached network using Telnet, a web browser. However, you must first configure the switch with a valid IP address, subnet mask, and default gateway. If you have trouble establishing a link to the management agent, check to see if you have a valid network connection. Then verify that you entered the correct IP address. Also, be sure the port through which you are connecting to the switch has not been disabled. If it has not been disabled, then check the network cabling that runs between your remote location and the switch.

NOTE: The management agent accepts up to four

simultaneous Telnet sessions. If the maximum number of sessions already exists, an additional Telnet connection will not be able to log into the system.

Gigabit Ethernet Switch – Hardware Manual Page 28 of 36 _______________________________________________________________

CABLES

TWISTED-PAIR CABLE AND PIN ASSIGNMENTS

For 10/100BASE-TX connections, the twisted-pair cable must have two pairs of wires. For 1000BASE-T connections, the twisted-pair cable must have four pairs of wires. Each wire pair is identified by two different colors. For example, one wire might be green and the other, green with white stripes. In addition, an RJ-45 connector must be attached to both ends of the cable.

CAUTION:

DO NOT plug a phone jack connector into any

RJ-45 port.

CAUTION:

Each wire pair must be attached to the RJ-45

connectors in a specific orientation.

The figure below illustrates how the pins on the RJ-45 connector are numbered. Be sure to hold the connectors in the same orientation when attaching the wires to the pins.

RJ-45 Connector Pin Numbers

10BASE-T/100BASETX PIN ASSIGNMENTS

Use unshielded twisted-pair (UTP) or shielded twistedpair (STP) cable for RJ-45 connections: 100-ohm Category 3 or better cable for 10 Mbps connections, or 100-ohm Category 5 or better cable for 100 Mbps connections. Also be sure that the length of any twistedpair connection does not exceed 100 meters (328 feet).

The RJ-45 ports on the switch base unit support automatic MDI/MDI-X operation, so you can use straightthrough cables for all network connections to PCs or servers, or to other switches or hubs. In straight-through cable, pins 1, 2, 3, and 6, at one end of the cable, are connected straight through to pins 1, 2, 3, and 6 at the other end of the cable. When using any RJ-45 port on this switch, you can use either straight-through or crossover cable.

10/100BASE-TX MDI and MDI-X Port Pinouts

MDI Signal Name

MDI-X Signal Name

1

Transmit Data plus (TD+)

Receive Data plus (RD+)

2

Transmit Data minus (TD-)

Receive Data minus (RD-)

3

Receive Data plus (RD+)

Transmit Data plus (TD+)

6

Receive Data minus (RD-)

Transmit Data minus (TD-)

4, 5, 7, 8

Not used

Gigabit Ethernet Switch – Hardware Manual Page 29 of 36 _______________________________________________________________

NOTE: The “+” and “-” signs represent the polarity of the

wires that make up each wire pair.

STRAIGHTTHROUGH WIRING

If the twisted-pair cable is to join two ports and only one of the ports has an internal crossover (MDI-X), the two pairs of wires must be straight through. (When autonegotiation is enabled for any RJ-45 port on this switch, you can use either straight-through or crossover cable to connect to any device type.)

You must connect all four-wire pairs as shown in the following diagram to support Gigabit Ethernet.

Straight-through Wiring

EIA/TIA 568B RJ-45 Wiring Standard 10/100BASE-TX Straight-through Cable

CROSSOVER WIRING If the twisted-pair cable is to join two ports and either

both ports are labeled with an “X” (MDI-X) or neither port is labeled with an “X” (MDI), a crossover must be

implemented in the wiring. (When auto-negotiation is enabled for any RJ-45 port on this switch, you can use either straight-through or crossover cable to connect to any device type.)

You must connect all four-wire pairs as shown in the following diagram to support Gigabit Ethernet.

Crossover Wiring

EIA/TIA 568B RJ-45 Wiring Standard 10/100BASE-TX Crossover Cable

Gigabit Ethernet Switch – Hardware Manual Page 30 of 36 _______________________________________________________________

1000BASE-T PIN ASSIGNMENTS

All 1000BASE-T ports support automatic MDI/MDI-X operation, so you can use straight-through cables for all network connections to PCs or servers, or to other switches or hubs.

The table below shows the 1000BASE-T MDI and MDI-X port pinouts. These ports require that all four pairs of wires be connected. Note that for 1000BASE-T operation, all four pairs of wires are used for both transmit and receive.

Use 100-ohm Category 5, 5e or 6 unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable for 1000BASET connections. Also, be sure that the length of any twisted-pair connection does not exceed 100 meters (328 feet).

1000BASE-T MDI and MDI-X Port Pinouts

MDI Signal Name

MDI-X Signal Name

1

Bi-directional Pair A Plus (BI_DA+)

Bi-directional Pair B Plus (BI_DB+)

2

Bi-directional Pair A Minus (BI_DA-)

Bi-directional Pair B Minus (BI_DB-)

3

Bi-directional Pair B Plus (BI_DB+)

Bi-directional Pair A Plus (BI_DA+)

4

Bi-directional Pair C Plus (BI_DC+)

Bi-directional Pair D Plus (BI_DD+)

5

Bi-directional Pair C Minus (BI_DC-)

Bi-directional Pair D Minus (BI_DD-)

6

Bi-directional Pair B Minus (BI_DB-)

Bi-directional Pair A Minus (BI_DA-)

7

Bi-directional Pair D Plus (BI_DD+)

Bi-directional Pair C Plus (BI_DC+)

8

Bi-directional Pair D Minus (BI_DD-)

Bi-directional Pair C Minus (BI_DC-)

CABLE TESTING FOR EXISTING CATEGORY 5 CABLE

Installed Category 5 cabling must pass tests for Attenuation, Near-End Crosstalk (NEXT), and Far-End Crosstalk (FEXT). This cable testing information is specified in the ANSI/TIA/EIA-TSB-67 standard. Additionally, cables must also pass test parameters for Return Loss and Equal-Level Far-End Crosstalk (ELFEXT). These tests are specified in the ANSI/TIA/EIA-TSB-95 Bulletin, “The Additional Transmission Performance Guidelines for 100 Ohm 4-Pair Category 5 Cabling.”

NOTE: That when testing your cable installation, be sure to

include all patch cables between switches and end devices.

Gigabit Ethernet Switch – Hardware Manual Page 31 of 36 _______________________________________________________________

ADJUSTING EXISTING CATEGORY 5 CABLING TO RUN 1000BASE-T

If your existing Category 5 installation does not meet one of the test parameters for 1000BASE-T, there are basically three measures that can be applied to try to correct the problem:

1. Replace any Category 5 patch cables with high-

performance Category 5e or Category 6 cables.

2. Reduce the number of connectors used in the link.

3. Reconnect some of the connectors in the link.

FIBER STANDARDS The International Telecommunication Union (ITU-T) has

standardized various fiber types for data networks. These are summarized in the following table.

Fiber Standards

ITU-T Standard

Description

Application

G.651

Multimode Fiber 50/125-micron core

Short-reach connections in the 1300- nm or 850-nm band

G.652

Non-Dispersion-Shifted Fiber

Single-mode, 9/125-micron core

Longer spans and extended reach. Optimized for operation in the 1310- nm band. but can also be used in the

1550-nm band

G.652.C

Low Water Peak NonDispersion-Shifted Fiber

Single-mode, 9/125-micron core

Longer spans and extended reach. Optimized for wavelength-division multiplexing (WDM) transmission across wavelengths from 1285

to 1625 nm. The zero dispersion wavelength is in the 1310-nm region.

G.653

Dispersion-Shifted Fiber

Single-mode, 9/125-micron

core

Longer spans and extended

reach. Optimized for

operation in the region

from 1500 to 1600-nm.

G.654

1550-nm Loss-Minimized

Fiber

Single-mode, 9/125-micron

core

Extended long-haul

applications. Optimized for

high-power transmission in

the 1500 to 1600-nm

region, with low loss in the

1550-nm band.

G.655

Non-Zero Dispersion-

Shifted

Fiber

Single-mode, 9/125-micron

core

Extended long-haul

applications. Optimized for

high-power dense

wavelength-division

multiplexing (DWDM)

operation in the region

from

1500 to 1600-nm.

Gigabit Ethernet Switch – Hardware Manual Page 32 of 36 _______________________________________________________________

SPECIFICATIONS

PHYSICAL CHARACTERISTICS

PORTS 8 10/100/1000Mbps UTP

2 GbE Combo Ports TP/ (100/1000M) SFP

NETWORK INTERFACE

Ports 1-8: RJ-45 connector, auto MDI/X

10BASE-T: RJ-45 (100-ohm, UTP cable; Category 3 or better)

100BASE-TX: RJ-45 (100-ohm, UTP cable; Category 5 or better)

1000BASE-T: RJ-45 (100-ohm, UTP or STP cable; Category 5, 5e or 6)

*Maximum Cable Length - 100 m (328 ft)

Ports 9-10: RJ45/SFP Combo ports

BUFFER ARCHITECTURE

512KB on-chip frame buffer

AGGREGATE BANDWIDTH

20 Gbps for MS453526M

SWITCHING DATABASE

8K MAC address entries

LEDS System: POWER

TP Port: status (LINK/ACT), 10/100/1000M

SFP Port: status (LINK/ACT/SPD), 100/1000M

SIZE 44(H) x 220(W) x 242(D) mm

TEMPERATURE Operating: 0°C to 45°C

HUMIDITY Operating: 10% to 90% (non-condensing)

POWER INPUT 100~240VAC, 50~60Hz

POWER Budget 8 Watts maximum

SWITCH FEATURES

FORWARDING MODE Store-and-forward

THROUGHPUT 14.880 Mpps

FLOW CONTROL Full Duplex: IEEE 802.3x

Half Duplex: Back pressure

Gigabit Ethernet Switch – Hardware Manual Page 33 of 36 _______________________________________________________________

Publication date: Aug., 2011

Revision A1

33

MANAGEMENT FEATURES

IN-BAND MANAGEMENT

SSH/SSL, Telnet, SNMP, or HTTP

OUT-OF-BAND MANAGEMENT

RJ-45 console port

SOFTWARE LOADING HTTP, TFTP in-band, Console out-of-band

STANDARDS

IEEE 802.3 => 10Base-T Ethernet (Twisted-pair Copper)

IEEE 802.3u => 100Base-TX Ethernet (Twisted-pair Copper)

IEEE 802.3ab => 1000Base-TX Ethernet (Twisted-pair Copper)

IEEE 802.3z => 1000Base-X Ethernet

IEEE 802.3x => Flow Control Capability

ANSI/IEEE 802.3 => Auto-negotiation

IEEE 802.1Q => VLAN

IEEE 802.1p => Class of Service

IEEE 802.1X => Access Control

IEEE 802.1D => Spanning Tree

IEEE 802.1w => Rapid Spanning Tree

IEEE 802.1s => Multiple Spanning Tree

IEEE 802.3ad => Link Aggregation Control Protocol (LACP)

IEEE 802.1AB => Link Layer Discovery Protocol (LLDP)

COMPLIANCES

EMISSIONS EN55022 (CISPR 22) Class A EN 61000-3

CE Mark

IMMUNITY EN 61000-4-2/3/4/5/6/8/11

EN 55024

Gigabit Ethernet Switch – Hardware Manual Page 34 of 36 _______________________________________________________________

COMPLIANCES

10BASE-T IEEE 802.3 specification for 10 Mbps Ethernet over two

pairs of Category 3, 4, or 5 UTP cable

100BASE-TX IEEE 802.3u specification for 100 Mbps Ethernet over two

pairs of Category 5 UTP cable.

1000BASE-LH Specification for long haul Gigabit Ethernet over two

strands of 9/125 micron core fiber cable

1000BASE-LX IEEE 802.3z specification for Gigabit Ethernet over two

strands of 50/125, 62.5/125 or 9/125 µm core fiber cable.

1000BASE-SX IEEE 802.3z specification for Gigabit Ethernet over two

strands of 50/125 or 62.5/125 micron core fiber cable.

1000BASE-T IEEE 802.3ab specification for Gigabit Ethernet over 100-

ohm Category 5, 5e or 6 twisted-pair cable (using all four-wire pairs).

AUTONEGOTIATION

Signaling method allowing each node to select its optimum operational mode (e.g., speed and duplex mode) based on the capabilities of the node to which it is connected.

BANDWIDTH The difference between the highest and lowest

frequencies available for network signals. Also synonymous with wire speed, the actual speed of the data transmission along the cable.

COLLISION DOMAIN

Single CSMA/CD LAN segment.

CSMA/CD CSMA/CD (Carrier Sense Multiple Access/Collision

Detect) is the communication method employed by Ethernet, Fast Ethernet, and Gigabit Ethernet.

END STATION A workstation, server, or other device that does not

forward traffic.

ETHERNET A network communication system developed and

standardized by DEC, Intel, and Xerox, were using baseband transmission, CSMA/CD access, logical bus topology, and coaxial cable. The successor IEEE 802.3 standard provides for integration into the OSI model and extends the physical layer and media with repeaters and implementations that operate on fiber, thin coax and twisted-pair cable.

FAST ETHERNET A 100 Mbps network communication system based on

Ethernet and the CSMA/ CD access method.

Gigabit Ethernet Switch – Hardware Manual Page 35 of 36 ______________________________________________________________

FULL DUPLEX Transmission method that allows two network devices to

transmit and receive concurrently, effectively doubling the bandwidth of that link.

GIGABIT ETHERNET A 1000 Mbps network communication system based on

Ethernet and the CSMA/ CD access method.

IEEE Institute of Electrical and Electronic Engineers.

IEEE 802.3 Defines carrier sense multiple access with collision

detection (CSMA/CD) access method and physical layer specifications.

IEEE 802.3AB Defines CSMA/CD access method and physical layer

specifications for 1000BASE-T Gigabit Ethernet. (Now incorporated in IEEE 802.3-2005.)

IEEE 802.3U Defines CSMA/CD access method and physical layer

specifications for 100BASE- TX Fast Ethernet. (Now incorporated in IEEE 802.3-2005.)

IEEE 802.3X Defines Ethernet frame start/stop requests and timers

used for flow control on full-duplex links. (Now incorporated in IEEE 802.3-2005.)

IEEE 802.3Z Defines CSMA/CD access method and physical layer

specifications for 1000BASE Gigabit Ethernet. (Now incorporated in IEEE 802.3-2005.)

LAN SEGMENT Separate LAN or collision domain.

LED Light emitting diode used for monitoring a device or

network condition.

LOCAL AREA NETWORK (LAN)

A group of interconnected computer and support devices.

MEDIA ACCESS CONTROL (MAC)

A portion of the networking protocol that governs access to the transmission medium, facilitating the exchange of data between network nodes.

MIB An acronym for Management Information Base. A set of

database objects contains information about the device.

MODAL BANDWIDTH

Bandwidth for multimode fiber is referred to as modal bandwidth because it varies with the modal field (or core diameter) of the fiber. Modal bandwidth is specified in units of MHz per km, which indicates the amount of bandwidth supported by the fiber for a one km distance.

NETWORK DIAMETER

Wire distance between two end stations in the same collision domain.

Gigabit Ethernet Switch – Hardware Manual Page 36 of 36 ______________________________________________________________

RJ-45 CONNECTOR A connector for twisted-pair wiring.

SWITCHED PORTS Ports that are on separate collision domains or LAN

segments.

TIA Telecommunications Industry Association.

TRANSMISSION CONTROL PROTOCOL/INTERNE T PROTOCOL (TCP/IP)

Protocol suite that includes TCP as the primary transport protocol, and IP as the network layer protocol.

USER DATAGRAM PROTOCOL (UDP)

UDP provides a datagram mode for the packet-switched communications. It uses the IP as the underlying transport mechanism to provide access to IP-like services.

UDP packets are delivered just like IP packets – connection-less data grams that may be discarded before reaching their targets. UDP is useful when TCP would be too complex, too slow, or just unnecessary.

UTP Unshielded twisted-pair cable.

VIRTUAL LAN (VLAN)

A Virtual LAN is a collection of network nodes that share the same collision domain in regardless of their physical location or connection point in the network. A VLAN serves as a logical workgroup with no physical barriers, allowing users to share information and resources as though located on the same LAN.

Microsens MS453526M Hardware Manual

Specifications and Main Features

Frequently Asked Questions

User Manual