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LevelOne GSW-2457 User Manual

GSW-1657

Made by: LevelOne
Type: User Manual
Category: Switch
Pages: 12
Size: 0.86 MB

 

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LevelOne 

User Manual 

 

 

 

GSW-1657/GSW-2457 

 

16

/

24-Port Gigabit Ethernet Switch 

 

 

 

                   

 

 

 

 

 V2.0-0908

 


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COPYRIGHT & TRADEMARKS 

Specifications are subject to change without notice. LevelOne is a registered 
trademark of Digital Data Communications Asia Co., Ltd. Other brands and 
product names are trademarks or registered trademarks of their respective 
holders. 

No part of the specifications may be reproduced in any form or by any means 
or used to make any derivative such as translation, transformation, or 
adaptation without permission from Digital Data Communications Co., LTD. All 
rights reserved. 

http://www.level1.com

 

 


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FCC STATEMENT 

 

This equipment has been tested and found to comply with the limits for a Class 
A digital device, pursuant to part 15 of the FCC Rules. These limits are 
designed to provide reasonable protection against harmful interference when 
the equipment is operated in a commercial environment. This equipment 
generates, uses, and can radiate radio frequency energy and, if not installed 
and used in accordance with the instruction manual, may cause harmful 
interference to radio communications. Operation of this equipment in a 
residential area is likely to cause harmful interference in which case the user 
will be required to correct the interference at his own expense. 

This device complies with part 15 of the FCC Rules. Operation is subject to the 
following two conditions: 

1)  This device may not cause harmful interference. 

2)  This device must accept any interference received, including interference 

that may cause undesired operation. 

Any changes or modifications not expressly approved by the party responsible 
for compliance could void the user’s authority to operate the equipment. 

 

CE Mark Warning 

 

This is a class A product. In a domestic environment, this product may cause 
radio interference, in which case the user may be required to take adequate 
measures. 

 

 

 

 

 

 

 


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TABLE OF CONTENTS

 

Package Contents ...........................................................................................1

 

Chapter 1.

 

Introduction of the Product .......................................................... 2

 

1.1

 

Overview of the Product..............................................................2

 

1.2

 

Features......................................................................................2

 

1.3

 

IEEE 802.1p QoS........................................................................3

 

Chapter 2.

 

Installation................................................................................... 4

 

2.1

 

Mounting the Switch on a Desk................................................... 4

 

2.2

 

Mounting the Switch in a Rack.................................................... 4

 

2.3

 

Power On ....................................................................................5

 

Chapter 3.

 

Identifying External Components ................................................ 6

 

3.4

 

Front Panel .................................................................................6

 

3.5

 

Rear Panel .................................................................................. 6

 

3.6

 

LED Indicators ............................................................................6

 

Appendix A:    Specifications ............................................................................ 7

 

Appendix B:    Troubleshooting ........................................................................8

 

Appendix C: Contact Information .....................................................................8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


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Package Contents 

The following contents should be found in your package: 

¾

  One GSW-1657/GSW-2457 Switch 

¾

  One power cord 

¾

  This User Guide 

¾

  Rubber footpads for Desk-mount 

¾

  Rack-mount kit for installing the switch in a 19-inch rack 

Note: 

Make sure that the package contains the above items. If any of the listed items 
are damaged or missing, please contact with your distributor. 

Safety Notices 

Do not use this product near water. Avoid using this product during an electrical 
storm. Do not place heavy objects on the switch. 

 


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Chapter 1.  Introduction of the Product 

This chapter describes the features of the GSW-1657/GSW-2457 16/24-port 
Gigabit Ethernet Switch. 

1.1 

Overview of the Product 

The GSW-1657/GSW-2457 16/24-port Gigabit Ethernet Switch provides you 
with a high-performance, low-cost, easy-to-use, seamless and standard 
upgrade to boost your old network to 1000Mbps. Increase the speed of your 
network server and backbone connections make Gigabit a reality. Power users 
in the home, of

fi

ce, workgroup, or creative production environment can now 

move large, bandwidth-intensive 

fi

les faster. Transfer graphics, CGI, CAD, or 

multimedia 

fi

les and other applications that have to move large 

fi

les across the 

network almost instantly. 

The GSW-1657/GSW-2457 features a non-blocking switching architecture that 
forwards and filters packets at full wire-speed for maximum throughput, MAC 
address auto- learning and auto-aging, IEEE802.3x 

fl

ow control for full-duplex 

mode and backpressure for half-duplex mode. It is compatible with all 10,100 
and 1000Mbps Ethernet devices because it is standard-based. It protects your 
existing network investments while providing you with a straightforward 
migration path to faster Gigabit speeds. 

The GSW-1657/GSW-2457 is plug-and-play and no configuration is required. 
Auto MDI/MDI-X cable detection on all ports eliminate the need for crossover 
cable or Uplink port. Each port can be used as general ports or Uplink ports, 
and any port can be simply plugged into a server, a hub, a router or a switch, 
using the straight cable or crossover cable. Diagnostic LEDs which display link 
status and activity, allowing you to quickly detect and correct problems on the 
network. 

1.2 

Features 

¾

  Supports IEEE 802.1p QoS 

¾

  Complies with IEEE802.3, IEEE802.3u, IEEE802.3ab standards 

¾

 

16/24 10/100/1000Mbps Auto-Sense RJ45 ports supporting 
Auto-MDI/MDIX 

¾

  All ports Support Full/Half Duplex transfer mode for 10/100Mbps and Full 

Duplex transfer mode for 1000Mbps 

¾

 Supports IEEE802.3x 

fl

ow control for full-duplex mode and backpressure 

for half-duplex transfer mode 

¾

  Non-blocking switching architecture that forwards and filters packets at full 

wire-speed for maximum throughput 

 


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¾

  Supports MAC address auto-learning and auto-aging 

¾

  LED indicators for monitoring power, link, speed and activity 

¾

  Rack-mountable steel case 

¾

 Internal power supply 

1.3 

IEEE 802.1p QoS 

The GSW-1657/GSW-2457 16/24-port Gigabit Ethernet Switch supports 
802.1p priority queuing Quality of Service, which is an implementation of the 
IEEE 802.1p standard. With 802.1p QoS function, you can reserve bandwidth 
for important functions that require a large bandwidth or have a high priority, 
such as VoIP (Voice-over Internet Protocol), web browsing applications or 
video conferencing. The Switch has separate hardware queues on every 
physical port which packets from various applications are mapped to and 
assigned a priority to. The illustration below shows how 802.1p priority queuing 
is implemented on the Switch. 

 

Mapping QoS on the Switch 

The Switch has four priority queues labeled 0, 1, 2 and 3. The untagged 
packets and the eight IEEE 802.1p priority levels defined by the standard are 
mapped to the four class queues used on the Switch. Among these four priority 
queues on the Switch, Class 3 has the highest priority, while Class 0 has the 
lowest priority and Class 3 has higher priority compared with Class 2. The 
Untagged packets and eight priority tags, specified in IEEE 802.1p are mapped 
to the switch’s priority tags as follows: 

The Untagged packets, priority 1 and 2 are assigned to the switch’s Class 0 
queue. 

Priority 0 and 3 are assigned to the switch’s Class 1 queue. 

Priority 4 and 5 are assigned to the switch’s Class 2 queue. 

Priority 6 and 7 are assigned to the switch’s Class 3 queue. 

The Switch uses WRR (Weighted Robin Round) for scheduling. WRR 
queue-scheduling algorithm schedules all the queues in turn and every queue 
can be assured of a certain service time. The default value of QoS mode on 
this Switch is “weight 1:2:4:8” from Class 0 to Class 3 queue in turn. 

 


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Chapter 2. 

Installation 

2.1 

Mounting the Switch on a Desk 

Before place the Switch on a desk, attach four rubber footpads to the flutes on 
the Switch bottom, then lay the Switch on the desktop, where can be have as 
much as 5kg placed on top. 

Note: 

1.  The electrical outlet shall be installed near the device and shall be easily 

accessible. 

2.  Make sure there is free space for radiating heat and air. 

3.  Make sure not to place anything too heavy on top of the switch. 

2.2 

Mounting the Switch in a Rack 

The dimension of GSW-1657/GSW-2457 is designed according to the 
standard 19 rack-mountable steel case of Electronic Industries Association. 

Turn off all the equipment connected to the Switch before mounting it in the 
rack, then rivet the two "L" brackets onto each side of the Switch, fasten it with 
screws in the rack. 

 

Figure 2-1    Rivet the “L” brackets onto the Switch 

 


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Figure 2-2    Fasten the Switch in the rack 

2.3 

Power On 

GSW-1657/GSW-2457 16/24-port Gigabit Ethernet Switch is powered by AC 
power supply. Powering on the Switch, it will automatically initialize and its LED 
indicators should respond as follows: 

1

 All of the Link/Act and 1000Mbps LED indicators will 

fl

ash momentarily for 

one second, which represents a resetting of the system. 

2

 The Power indicator will light up. 

If the LED indicators don't respond as described above, please check the 
power supply and connection. 

 


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Chapter 3. 

Identifying External Components 

This Chapter describes the front panel, rear panel and LED indicators of the 
Switch. GSW-1657 and GSW-2457 just differ in the number of LED indicators 
and ports and all 

fi

gures in this guide are of GSW-2457. 

3.4  Front Panel 

The front panel of the GSW-2457 consists of switch LED indicators, 24 
10/100/1000Mbps RJ-45 ports. 

 

Figure 3-1 GSW-2457 Switch Front Panel sketch 

3.5  Rear Panel 

The rear panel of the GSW-2457 only features a power receptacle, which is an 
AC power receptacle. Connect the female of the power cord head here, and 
the male head to the AC power outlet. 

 

Figure 3-2 GSW-2457 Switch Rear Panel sketch 

3.6  LED Indicators 

The LED indicators include Power, Link/Act and 1000Mbps LED indicators, 
which are used for monitoring and pre- troubleshooting of the Switch. The 
following section shows the LED indicators for the switch along with an 
explanation of each indicator. 

 

Figure 3-3    GSW-2457 Switch LEDs sketch 

¾

  Power LED: This indicator will light solid red when the Switch powers up. If 

the LED is not lit, please check the power supply and connection. 

¾

  Link/Act LED: This indicator will light solid green when the corresponding 

port is connected to another device and will 

fl

ash green when data is being 

transmitted or received on the working connection. 

¾

  1000Mbps LED: This indicator will light solid green when the corresponding 

port is connected to a 1000Mbps device. 

 


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Appendix A:  Specifications 

General

 

Standards 

IEEE802.3 10Base-T 
IEEE802.3u 100Base-TX 
IEEE802.3ab 1000Base-T 

Topology Star 

Protocol CSMA/CD 

Ethernet: 10Mbps (Half Duplex), 20Mbps (Full 
Duplex) 

Fast Ethernet: 100Mbps (Half Duplex), 
200Mbps (Full Duplex) 

Data Transfer Rate 

Gigabit Ethernet: 2000Mbps (Full Duplex) 

10Base-T: UTP category 3, 4, 5 cable 
(maximum 100m) 
EIA/TIA-568 100 STP (maximum 100m) 

100Base-TX: UTP category 5, 5e cable 
(maximum 100m) 
EIA/TIA-568 100 STP (maximum 100m) 

Network Media (Cable)   

1000Base-T: UTP category 5, 5e cable 
(maximum 100m) 
EIA/TIA-568 100 STP (maximum 100m) 

Number of Ports 

16/24 10/100/1000Mbps Auto-Negotiation 
RJ-45 ports 

LED indicators 

Power, Link/Act, 1000Mbps 

Transfer Method   

Store-and-Forward 

MAC Address Learning   

Automatically learning, automatically aging 

10Base-T: 14881pps/Port 

100Base-Tx: 148810pps/Port 

Frame Filter Rate 

1000Base-T: 1488095pps/Port 

10Base-T: 14881pps/Port 

100Base-Tx: 148810pps/Port 

Frame Forward Rate 

1000Base-T: 1488095pps/Port 

 

 


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Environmental and Physical 

Dimensions 17.3×7.1×1.7in. (440×180×44mm) W×D×H 

Power Supply Output 

100-240V~ 50/60Hz 0.6A 

Operating Temperature 

0 ~40

 (32 ~104

Storage Temperature 

-40 ~70

 (-40 ~158

Operating Humidity 

10%~90% non-condensing 

Storage Humidity 

5%~90% non-condensing 

Appendix B:  Troubleshooting 

1.  The Power LED is not lit 

¾

  Make sure the AC power cord connected the Switch with power source 

properly. 

¾

  Make sure the power source is ON. 

2. The Link/Act LED is not lit when a device is connected to the 

corresponding port 

¾

  Make sure that the cable connectors are 

fi

rmly plugged into the Switch and 

the device. 

¾

  Make sure the connected device is turned on and working well. 

¾

  The cable must be less than 100 meters long (328 feet). 

Appendix C: Contact Information 

For help with the installation or operation of the GSW-1657/ GSW-2457 
16/24-port Gigabit Ethernet Switch, please contact us. 

E-mail:

 support@level1.com

 

Website:

 http://www.level1.com