LevelOne GSW-2490TXM User Manual

LevelOne

GSW-2490TXM

24-Port + 2 Slide-in Slots SNMP Switch

1.
Introduction

Welcome to the World of Switching-Network.
In modern society, communication and information sharing are
fundamental to our lifestyle. Computer networks are one of the
fastest means of communication.
As your company grows, your network demands will increase. …

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The LevelOne GSW-2490TXM SNMP Switch are designed to
provide your network with Ethernet, Fast Ethernet, Gigabit Ethernet
connectivity over twisted pair and fiber optic cabling. Two expansion
slots on the front panel of the LevelOne GSW-2490TXM SNMP
Switches further add to the flexibility of the systems.

Figure 1-1. The
24TP+2Exp-Slot Switch

The LevelOne GSW-2490TXM SNMP is a managed Fast Ethernet
switch, that provides a number of exceptional features with
extremely flexible configuration expansions without compromising

the wire speed performance.
The LevelOne GSW-2490TXM SNMP switch provide wire-speed
switching with advanced bridging functions like VLAN, priority,
multicast filtering, link aggregation and port mirroring. It can also
support two different GBIC type as Mini GBIC LC and standard
GBIC SC.
Many comprehensive network management functions are provided,
such as Spanning Tree protocol for loop prevention and full
recovery, VLAN configuration and IGMP snooping for multicast
grouping configuration. VT100 console, remote telnet login, SNMP,
and Web Interfaces are all standard management features.

Features

_ Conforms to IEEE802.3,IEEE802.3u,IEEE802.3z ,IEEE802.3x

IEEE802.1p, IEEE802.3ac, IEEE802.1D, IEEE802.1Q

 24 auto-sensing 10/100Mbps Ethernet RJ-45 ports
 2 Expansion slots for optional modules: 1-port Duplex SC

Gigabit ( SX/LX ), 100Mbps Fiber ( SC/MT-RJ/VF-45 ),

1 RJ-45 for UTP or STP Gigabit 1000T Module with
Automatic MDI/MDIX support, Mini GBIC LC type and
Standard GBIC SC type.

 One Console-connecting port for communication parameter

configuration

 Auto-negotiation & Full-duplex/half-duplex supported
 Store-and- Forward error free packet forwarding scheme
 9.6 GB Backplane Bandwidth
 8K-entry MAC address table
 6Mbits share memory
 Full wire speed forwarding rate

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 LED-indicators for Power, per port Link/Active, FDX/COL

10/100M Gigabit Module LK/ACT, FDX/ COL statuses

Intelligent Management Features

 Console and Telnet Configuration
 Web-based management
 SNMP network management
 IEEE 802.1Q Tagging VLAN and Port Based VLAN

supported

 IEEE802.3x Flow Control Mechanism is used in Full-Duplex

mode and back-pressure is used in half-duplex

 IEEE 802.1D Blocking, Learning, and Forwarding state are

supported for Spanning Tree Protocol

 IEEE 802.3ac Extends the maximum Ethernet Length to

1522 to Add the 4-Byte VLAN Tag

 IEEE802.1p, provides four levels priority per port, packets

are prioritized according to the source port or the 802.1p
priority tag

 Security Functions Supported
 IGMP Snooping and GMRP protocol supported
 Link Aggregation function supported
 Port Priority - 802.1p & TOS (Type of Service ) supported
 TFTP support for firmware on network upgrade
 Port Mirror supported

Package Contents

Unpack the carton of the LevelOne GSW-2490TXM SNMP Switch
and verify them against the checklist below.

LevelOne GSW-2490TXM SNMP Switch Rubber Feet

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GSW-2490TXM

24-Port + 2 Slide-in Slot
SNMP Switch

Rack-mounted Kit RS-232 cable User Guide

Power Cord

Figure 1-2. Package Contents

Compare the contents of your LevelOne GSW-2490TXM SNMP
Switch package with the standard checklist above. If any item is
missing or damaged, please contact your local dealer for service.

Management Methods

The LevelOne GSW-2490TXM SNMP Switch supports following
management methods:

 Console and Telnet Management
 Web-based Management
 SNMP Network Management

Console and Telnet Management

Console Management is done through the RS-232 Console Port.
Managing the LevelOne GSW-2490TXM SNMP Switch in this
method requires a direct connection between PC and the LevelOne
GSW-2490TXM SNMP Switch. While Telnet management is done
over the network. Once the LevelOne GSW-2490TXM SNMP
Switch is on the network, you can use Telnet to Log in and change
the configuration.

SNMP Network Management

SNMP (Simple Network Management Protocol) provides a means
to monitor and control network device, and to manage
configurations, statistic collection, performance, and security.
Data is passed from SNMP agents, which are hardware & software

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processes reporting activity in each network device to the
workstation console used to oversee the network. The agent return
information contained in a MIB (Management Information Base),
which is a data structure that defines what is obtainable from the
device and what can be controlled.

2.
Hardware Description

This section mainly describes the hardware of the LevelOne GSW­2490TXM SNMP Switch, and gives a functional overview of the
Switch.

The physical dimensions of the LevelOne GSW-2490TXM
SNMP Switch are: 440mmx 225mmx 44.5mm ( Lx Wx H )

Hardware Description

The LevelOne GSW-2490TXM SNMP Switch is a fixed 24-port
auto-sensing Ethernet RJ-45 connectors, and its chassis contains
two expansion slots. The optional modules come with the built-in
CPU module.

The Front Panel

The Front Panel of the LevelOne GSW-2490TXM SNMP Switch
consists of 24x auto-sensing 10/100Mbps Ethernet RJ-45 Ports, two
optional expansion slots, and Console port. The LED Indicators are
also located on the front panel of the Switch.

RJ-45 Ports

LED Indicators

Console Port

Figure 2-1. The Front Panel of LevelOne GSW-2490TXM SNMP Switch

Expansion Slots for Optional

10/100Base-TX RJ-45 ports ( Auto MDI/MDIX ):

24x 10/100Mbps auto-sensing port for 10Base-T or 100Base-TX
devices connection. Note: [ MDI/MDIX means that you can connect

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to another Switch or workstation without changing non-crossover or
crossover cabling. ]

Expansion Slots :

For two of the following Optional modules :
1 Port Gigabit 1000Base-T Intelligent Switch Modules,
1 Port Gigabit 1000Base-SX/LX Intelligent Fiber Modules.
1 Port 100Base-FX Intelligent Fiber Module

Console Port :

Console Management can be done through the Console Port. It
requires a direct connection between the LevelOne GSW-2490TXM
SNMP Switch and an end station ( PC ) via a RS-232 cable.

LED Indicators

Figure 2-2 The LED
Indicators

All LED indicators are located on the front panel of the LevelOne
GSW-2490TXM SNMP Switch. They provide a real-time indication
of system and operational status. The following table
gives descriptions of the LED status and their meanings.

LED Status

Green Power On

PWR

Off Power is Off.

Description

Green The port is operating at the speed of 100Mbps.

100

Off No device attached or in 10Mbps mode

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Green The port is connecting with the device.

LK/ACT

FD/COL

Table 2-1. The Descriptions of LED Indicators

Blinks The port is receiving or transmitting data.

Off No device attached.

Yellow The port is operating in Full-duplex mode.

Blinks Collision of Packets occurs in the port.

Off No device attached or in half-duplex mode .

Rear Panel

The 3-pronged power plug, On/off Switch are located at the Rear
Panel of the LevelOne GSW-2490TXM SNMP Switch. ( The
Ventilation fan is located on the side of the Switch ). The Switch will
work with AC in the range 100-240V AC, 50-60Hz.

Figure 2-3. The Rear Panel of the LevelOne GSW-2490TXM SNMP
Switch

Power On

After all network cables are connected, plug the power cord into the
power socket on the back panel and the other end into a power
outlet. Turn the power On using the power Switch on the back
panel.

Check the front panel Power indicator to see if power is properly
supplied. The Switch uses a universal power supply that requires no
additional adjustment.

Diagnostic Test

After the installation is completed and AC power is applied to the
Switch, the system will automatically perform a diagnostic test.
When the Power LED is on within 5 seconds, the Diagnostic status

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LEDs will soon flash red.

When the Switch passes the self-test within 15 seconds, the Link
/ACT LED turns on.

Note : If the Switch fails the self-test, the Diag LED will blink.

3.
Connecting to the Network

This section provides the installation procedure and instructions for
assigning IP address.

Pre-Installation Requirements

Before you start hardware installation, make sure your installation
environment has below items:

 PCs with 10/100Mbps Ethernet NICs/ 100Mbps Fiber NICs:

Your PC must have a standard Ethernet interface to connect to
the Switch.

 UTP cable with RJ45 connectors/ Fiber cable with MT-RJ/

VF-45 connectors: Check if the cable and connectors work

properly.

 A power outlet: 100 to 240V AC at 50 to 60 Hz: Make sure

that the Switch power is accessible and cables can be
connected easily.

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 Dedicated power supply: Use dedicated power circuits or

power conditioners to supply reliable electrical power to the
network devices.

 A dry cool place: Keep the Switch away from moisture. Avoid

direct sunlight, heat source, and high amount of electromagnetic
interference around.

 Mounting tools: If you intend to mount the Switch on a rack,

make sure you have all the tools, mounting brackets, screws
etc.

Caution:

 Cabling must be away from sources of electrical noise such as

radio, computers, transmitters, broadband amplifiers, power
lines and keep away from TVs, hair dryers, and microwave.

 Air flow around the Switch and through its vents on the rear

cannot be restricted.

Mounting the Switch

The LevelOne GSW-2490TXM SNMP Switch is suitable for use in
an office environment where it can be rack-mounted in standard EIA
19-inch racks or standalone.

Desktop Mounting

1. Set the Switch on a sufficiently large flat space with a power
outlet nearby, and about the center of all networked devices.

2. Make sure mounting surface on the bottom of the Switch is
grease dust free.

3. Remove adhesive backing from your Rubber Feet.

Figure 3-1. Attaching Rubber Feet to each corner

on the bottom of the Switch

4. Apply the Rubber Feet to each corner on the bottom of the
Switch. These footpads can prevent the Switch from
shock/vibrations.

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Caution: Do not place objects on top of the Switch.

Rack-mounted Installation

The LevelOne GSW-2490TXM SNMP Switch come with a rack­mounted kid and can be mounted in an EIA standard size, 19-inch
Rack. The Switch can be placed in a wiring closet with other
equipment.

Perform the following steps to rack mount the Switch:

A. Position one bracket to align with the holes on one side of the

Switch and secure it with the smaller bracket screws. Then
attach the remaining bracket to the other side of the Switch.

Figure 3-2. Attach mounting brackets with screws

B. After attached both mounting brackets, position the LevelOne

GSW-2490TXM SNMP Switch ( UTP/MT-RJ/VF-45 ) Switch in
the rack by lining up the holes in the brackets with the
appropriate holes on the rack. Secure the Switch to the rack with
a screwdriver and the rack-mounting screws.

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Figure 3-3. Mount the 24TP+1Fiber Module Switch in an EIA

standard 19-inch Rack

Note: For proper ventilation, allow about at least 4 inches ( 10 cm )
of clearance on the front and 3.4 inches ( 8 cm ) on the back of the
Switch. This is especially important for enclosed rack installation.

Connecting to the Switch

The Console port is a male DB-9 connector that enables a
connection to a PC or terminal for monitoring and configuring the
LevelOne GSW-2490TXM SNMP Switch. Use the supplied RS-232
cable with a female DB-9 connector to connect a terminal or PC to
the Console port.

The Console configuration ( out of band ) allow you to set your
Switch to enable a user at a remote console terminal to
communicate with the LevelOne GSW-2490TXM SNMP Switch as if
the console terminal were directly connected to it.

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Figure 3-4. Connecting the LevelOne GSW-2490TXM SNMP Switch

to a terminal via RS-232 cable

Login in the Console Interface

When the connection between Switch and PC is finished, turn on
the PC and run a terminal emulation program or Hyper Terminal
and configure its communication parameters to match the
following default characteristics of the console port:

Baud Rate: 9600 bps
Data Bits: 8
Parity: none
Stop Bit: 1
Control flow: None

Figure 3-5. The settings of
communication parameters

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After you have finished parameter settings, click “OK“. When the
screen shows above, press “admin“ Key for the User name, then
the Main Menu of console management appears.

Main Menu

Figure 3-6. The screen of Main Menu

After login you will see the main menu screen as illustrated in the
picture. The main menu displays all the sub-menu and pages that
are available in the console interface.

1. System Information

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Figure 3-7. The System Information Menu

The system information screen displays information such as
hardware, software versions, and system up time. You can also
enter specific information about you and your organization here.

2. Management Setup

Figure 3-8. The Management Setup Menu

The management setup menu contains 6 submenus and are
discussed in the section in the following pages.

2.1. Network Configuration

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Figure 3-9. The Network Configuration Men

This screen is provided to change the IP setting of your switch
according to your network configuration. After changing the setting
you need to save it so that whatever changes you made can take
effect. Also note that the value under Current column will not reflect
the changes you made until next time you login after resetting the
switch.

2.2. Serial Port Configuration

Figure 3-10. The Serial Port Configuration

You can change the serial port setting through this screen to suit
you environment, however, we recommend you to keep the default
setting.

2.3. SNMP Community Setup

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Figure3-11. The SNMP Community Menu

In the SNMP Community Menu, you can create different
communities and customize their access right. Use <TAB> key to
move the highlight bar and select desired community to modify or
add a new community (use space bar to toggle the access right
and status)

2.4. Trap Receiver

Figure 3-12. The Trap Receiver Menu

Use trap receiver screen to designate certain community to receive
trap(s) generated by the system.

2.5. Management Capability Setup

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Figure 3-13. The Management Capability setup Menu

This is where you can enable / disable Web-Based management
capability which in turn allow or disallow the access to
management function through the use of a web browser such as
Microsoft IE.

2.6. Trap Filter Setup

Figure 3-14. The Trap Filter Setup menu

The system can generate a set of SNMP traps upon the
occurrence of those events. By checking a filter event, you are
turning off the filter and enabling the trap associated with that
event.

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3. Device Control Menu

Figure 3-15. The Device Control menu

Device control menu contains 15 submenus where you get to maneuver
most of the functions and features.

3.1. Switch Device Configuration

Figure 3-16. The Switch Device Configuration menu

Use <Space Bar> key to toggle the Enable / Disable field and type
in appropriate value in the Time and Priority field.

•Broadcast Storm Prevention can be set to 6% 0r 20% beside
Disable. The percentage indicates the allowance against the
capacity. When its disable there will be no limitation on the
incoming rate of broadcast / multicast traffic, otherwise limitation on
those traffics will be set to the percentage accordingly.

•When QoS is enabled you can map the Type of Service of your

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choice (according to IEEE 802.1p) to the four priority levels
provided.

•There are three different mode of VLAN supported in this system –

802.1Q, Port Base VLAN, MTU/MDU. The choice you made here
will ultimately decide the VLAN mode and function for entire system
(the configuration of the other two VLAN mode will have no effect to
the system behavior).

3.2. Switch Port Configuration

Figure 3-17. The Switch Port Configuration menu

The Ports (24+2) of the system are divided and displayed in three
separated pages. Use PREV PAGE, NEXT PAGE to list desired
port range and select the port with navigation key.
In the port configuration screen (display in next page) you can
configure the common characteristics such as speed negotiation,
flow control, and VLAN ID as well as the following special features
provided with the system:

• Per-Port Priority – Four levels of priority (High, Medium, Low and

Lowest) can be set to each individual port. However, the priority
level set through QoS / Type of Service configuration in the device
configuration menu will have higher precedence.

• Local IP Forwarding – A policy instrument that provides a way for

local IP traffic to cross the local VLAN boundary set force in a
typical (secure) access environment.

• Bandwidth provisioning - 8 levels of speed control facilitate the

provisioning control for access provider.

3.3. Permanent Address Configuration

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Figure 3-18. The Permanent Address Configuration menu

There are 128 static unicast groups and 32 multicast supported by
the system. Two submenus contains in this section.

3.3.1. Static Unicast Address Configuration

You can creat, modify, or delete Static Unicast Address by
selecting entries from the following screen.

Enter the MAC address of a system you wish to set as static
unicast address the port associated with the system. Use<Space
Bar> to toggle the status field between Disable, Forwarding, Filter­In, and Filter-Out.

• Disable – This Unicast Address entry has no effect to the switch
system.

• Forwarding – All packets designated to this MAC address will be
forward (and only to) the designated port.

• Filter-in – Only packets originated to from this MAC address will
be permitted to enter this port, in other words, packets originated
from other MAC address will be dropped at this port automatically.

• Filter-out – All packets designated to this MAC address will be
blocked (the port is disregard here).

3.3.2. Static Multicast Address Configuration

In the Static Multicast Configuration Menu screen, besides the
MAC Address and Status field (Enable/Disable), you add
member(s) to the group by checking the port(s) with <Space Bar>
key.

3.4. Port Statistics

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Figure 3-19. The Port Statistics menu

You can view the statistics information display in this screen
regarding a certain port by entering the port number in the port id
field. You can also refresh or reset the counter as you wish.

3.5. Spanning Tree Protocol Configuration

Figure 3-20. The Spanning Tree Protocol Configuration menu

You can alter the Spanning Tree status with <Space Bar> key. If
you enable the spanning tree protocol, you must complete the
Priority and Time fields with appropriate value. Also note that you

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can choose to leave a menu screen without applying any changes
you had made at any time by pressing <Esc> key and then confirm
with <Enter> key.

3.6. Spanning Tree Protocol Port Configuration

Figure 3-21. The Spanning Tree Protocol port Configuration menu

In this screen you can assign spanning priority and path cost to any
port(s). A port with higher priority, lower path cost is less likely to be
blocked if Spanning Tree Protocol is detecting network loop.

3.7. Post-Based VLAN Configuration

Figure 3-22. The Port Based VLAN Configuration menu

Assigning physical ports within workgroup is simple, and is a
common method of defining a virtual workgroup – VLAN. It delivers
the benefit of broadcast control and simplifies configuration for the
network manager.

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One advantage of the Port-Based VLAN is its simplicity and easy to
configure, however, limited security is its drawback – anyone can
plug into the port and gain access to the VLAN.

Select the VLAN entry to create, modifies, or deletes the VLAN
group. Use <Space Bar> to check (join) port(s) to the VLAN group.

3.8. 802.1Q VLAN Configuration

Only as 802.1Q VLAN mode was chosen then the settings of the
following submenus would be meaningful and therefore need to be
configured carefully.

3.8.1. 802.1Q VLAN Configuration

This screen shows the currently set VLAN sorted by index number.
Select the entry to create, modify, or delete and proceed to the next
screen.

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Figure 3-23. The Port Based VLAN Configuration menu

( ) – Port(s) is not set as static (fixed) member of the VLAN but it
can become a member through Dynamic VLAN Registration.
(F) – Port(s) is set as static (fixed) member of the VLAN and can be
registered as a dynamic VLAN member as well.
(B) – Port(s) is being forbidden to be neither a static member nor a
dynamic member of the VLAN.

3.8.2. Dynamic VLAN Table

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Figure 3-24. The Dynamic VLAN Table menu

This screen displays the VLAN mapping for port(s) that join the
VLAN(s) through Dynamic VLAN Registration.

3.8.3. VLAN Untagged Configuration

Figure 3-25. The Port Untag Configuration menu

All ports are set by default as <Untagged> in this switch system, to
change port(s) to <Tagged> just use
<Space Bar> to uncheck - ( ) the port(s) from the Port Map.

3.8.4 GARP Configuration

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Figure 3-26. The GARP Configuration menu

GARP (Generic Attribute Registration Protocol) defines the
architecture, rules of operation, state machines and variables for
the registration and de-registration of attribute values. It allows
dynamic filter entries for
VLAN membership to be distributed among the Forwarding
Databases of VLAN-aware switches. By joining GVRP (GARP
VLAN Registration Protocol), it helps maintaining VLAN
information. The rule of the aging scheme is:

GARP Leave All Time > GARP Leave Time > GARP Join Time

3.9. MTU/MDU Per-Port VLAN Table

Figure 3-27. The MTU/MDU Per-Port VLAN Table menu

This screen only reflects the setting you made in Switch Device
Configuration menu - there is no change can be made here. Should
you set the VLAN Mode to <MTU/MDU> mode and <one Uplink>

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port then
port 1 ~ 25 will be mapped to port 26 - the uplink port, otherwise,
port 1 ~ 12 and port 13 ~ 24 will be mapped to uplink port 25 and
port 26 accordingly.

3.10. IGMP Snooping Table

Figure 3-28. The IGMP Snooping Table

By supporting IGMP (Internet Group Management Protocol)
Snooping, the switch can forward multicast traffic intelligently.
Packets are forwarded to the ports that belong to the multicast
group instead of being
broadcast to all ports and possibly disrupting network performance.
This lookup table reflects the multicast group(s) (up to 32)
configuration of your system and provides an overview of the
port(s) map to each
multicast group.

3.11. Trunk Group Configuration

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Figure 3-29. The Trunk Configuration Menu

Multiple links between switches can be grouped (trunk) to work as
one virtual, aggregate link. You can create 4 trunks at a time; each
trunk can hold up to 8 ports - only ports of the same speed can
belong to a single trunk.

3.12. Port Mirroring Configuration

Figure 3-30. The Port Mirroring Configuration Menu

By enabling port mirroring, traffic to and from the source port will be
forwarded to the target port. You can select any of the 26 port as
either the Source port or the Target port by using <Space Bar> to
scroll though the desired port number

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.

4. User Authentication

Figure 3-31. The User Authentication Menu

You can change the password setting as in the user authentication
menu. You can also create user and assign different privilege to
suit your needs.

After selecting an entry to add or modify, type in user name and
password, toggle the user privilege with <Space Bar> and then
update the changes.

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5. System Utility

5.1 System Restart

Figure 3-32. The System Restart Menu

As mention earlier, you need to perform either a <Cold Start> or
<Warm Star> to have the changes you made written into the
NVRAM so that changes are really saved and keep in effect until
you make change to them again.

5.2 Factory Reset

Figure 3-33. The Factory Reset Menu

The system can let you to reset all configurations as you wish
anytime.

5.3 Login Timeout Interval

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Figure 3-34. The Login Timeout Interval

You can set up the time you need for the automatic log-out in
anytime.

5.4 System Download

Figure 3-35. The System Download Menu

Use TFTP download the code you need, and two code as Boot
code and System Software code for upgrading.

4.
Web-Based Management

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This section introduces the configuration and functions of the Web­Based management.

About Web-based Management

Inside the CPU board of the switch exists an embedded HTML web
site residing in flash memory. It offers advanced management
features and allow users to manage the switch from anywhere on
the network through a standard browser such as Microsoft Internet
Explorer.

The Web-Based Management supports Internet Explorer 5.0. It is
based on Java Applets with an aim to reduce network bandwidth
consumption, enhance access speed and present an easy viewing
screen.

Note: By default, IE5.0 or later version does not allow Java Applets
to open sockets. The user has to explicitly modify the browser
setting to enable Java Applets to use network ports. ( See Appendix
A: for the means to modify the setting ).

System Login

1. Start Internet Explorer.

2. Type http:// and the IP address of the Modular Switch ( for

example, the default is 192.168.16.1 ) in the Location or
Address field. Press Enter.

Figure 4-1: The Password Window

3. The Password screen appears.

4. Type user name and password. The default is “ admin ” for

both.

5. Press “Enter” or Click ”OK”, then the Home Screen of the Web-

based management appear.

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System Information

24-Port with 2 Slide-in Slots SNMP Switch

Figure 4-2 The System Information Menu

You can manage the Switch using third-party’s SNMP ( Simple
Network Management Protocol ) agent. Access rights to the SNMP
agent are controlled by community strings.
To set system name, system location and system contact, you can
type the desired text string in the corresponding edit box.

Management Setup

Network Configuration

Figure 4-3. The Network Configuration Menu

You can change the IP address, subnet mask and default gateway
of the managed node. (You can also do that from RS232 console).
Enter the IP address, subnet mask and default gateway in the
corresponding edit box.

If you want to change the user name or password for the managed
node, the following steps is needed:

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 Click the "Change Password" checkbox

 Enter the user name in "Username" edit box

 Enter the same password in "Password" and "Confirm

Password" edit box

 Press the "Apply" button

You should reboot system to let your settings take effect if you have
changed one of the IP address, subnet mask and default gateway.

Serial Port Configuration

Figure 4-4. The Serial Port Configuration Menu

You can change the serial port setting through this screen to suit
you environment, however, using the default setting is
recommended.

SNMP Community Setup

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Figure 4-5. The SNMP Community Setup Menu

Public Community ( Read-only access right ) means that member
of community can view the information but can not make changes
to the configuration.

Private Community ( Read/Write access right ) allow the member
of the community to view and make change to the configuration.

To set the "Public" and "Private" community name, you can type the
desired text string in the corresponding edit box.

Trap Receiver

Figure 4-6. The Trap Receiver Menu

Use trap receiver screen to designate certain community to receive
trap(s) generated by the system.

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Management Capability Setup

Figure 4-7. The Management Capability Setup Menu

This is where you can enable / disable Web-Based management
capability which in turn allow or disallow the access to management
function through the use of a web browser such as Microsoft IE.

Trap Filter Setup

Figure 4-8. The Trap Filter Setup Menu

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The system can generate a set of SNMP traps upon the occurrence
of those events. By checking a filter event, you are turning off the
filter and enabling the trap associated with that event.

Device Control

Switch Configuration

Figure 4-9. The Switch Configuration upper Menu

1. There are three different mode of VLAN supported in this

system – 802.1Q, Port Base VLAN, MTU/MDU. The choice you

made here will ultimately decide the VLAN mode and function for

entire system (the configuration of the other two VLAN mode will

have no effect to the system behavior).

2. Broadcast Storm Prevention can be set to 6% 0r 20% beside

Disable. The percentage indicates the allowance against the

capacity. When its disable there will be no limitation on the

incoming rate of broadcast / multicast traffic, otherwise limitation on

those traffics will be set to the percentage accordingly.

3. When QoS is enabled you can map the Type of Service of your

choice (according to IEEE 802.1p) to the four priority levels

provided.

Figure 4-10. The Switch Configuration lower Menu

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Switch Port Configuration

Figure 4-11. The Port Administration in Switch Port Configuration Menu

The Ports (24+2) of the system are divided and displayed in three
separated pages. In the port Administration menu, select a port that
you can configure the common characteristics such as speed
negotiation, flow control, and VLAN ID as well as the following
special features provided with the system:

• Per-Port Priority – Four levels of priority (High, Medium, Low and
Lowest) can be set to each individual port. However, the priority
level set through QoS / Type of Service configuration in the device
configuration menu will have higher precedence.

• Local IP Forwarding – A policy instrument that provides a way for
local IP traffic to cross the local VLAN boundary set force in a
typical (secure) access environment.

• Bandwidth provisioning - 8 levels of speed control facilitate the
provisioning control for access provider.

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Figure 4-12. The Trunk Group in Switch Port Configuration Menu

Port trunking is the ability to group several ports to increase the

bandwidth between this switch and another compatible switch. This

is an inexpensive way to increase bandwidth. We define port

trunking as the ability to group set of ports (up to 4 groups).

Figure 4-13. The Port Mirror in Switch Port Configuration Menu

Port Mirror is to mirror traffic (all frames) from a specific resource

port to a target port. This help tracking down network errors or

erroneous packet transfers without interrupting the flow of data

across the network.

If you want to monitor all receive and transmit packets of one port.

You can do the following:

 Choose the monitored port in " Source Port "

 Choose the corresponding target module, port in “Target Port"

choice box.

 Click the corresponding "Enabled" check box.

 Press "Submit" button

Permanent Address Configuration

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Figure 4-14. The Static Unicast Address in Permanent Address
Configuration Menu

You can Add, modify, or delete Static Unicast Address by selecting

entries from the following screen.

Enter the MAC address of a system you wish to set as static

unicast address the port associated with the system. Select the

status field between Disable, Forwarding, Filter-In, and Filter-Out.

• Disable – This Unicast Address entry has no effect to the switch

system.

• Forwarding – All packets designated to this MAC address will be

forward (and only to) the designated port.

• Filter-in – Only packets originated to from this MAC address will

be permitted to enter this port, in other words, packets originated

from other MAC address will be dropped at this port automatically.

• Filter-out – All packets designated to this MAC address will be

blocked (the port is disregard here).

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Figure 4-15. The Static Multicast Address Configuration in Permanent
Address Configuration Menu

In the Static Multicast Configuration Menu screen, you can add

member(s) to the group by checking the port(s).

Spanning Tree Protocol Configuration

Spanning tree is a link management protocol that provides path
redundancy while preventing undesirable loops in the network. For
Layer 2 Ethernet network to function properly, only one active path
must exist between two stations.

The spanning-tree algorithm calculates the best loop-free path
throughout a switched network. STP forces redundant data paths
into a standby (blocked) state. If a network segment in the spanning
tree fails and a redundant path exists, the spanning-tree algorithm
recalculates the spanning tree topology and activates the standby
path.

Figure 4-16. The Spanning Tree Protocol Configuration upper Menu

If you enable the spanning tree protocol, you must complete the

Priority and Time fields with appropriate value.

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Figure 4-17. The Spanning Tree Protocol Configuration lower Menu

Spanning Tree Protocol Port Configuration

Figure 4-18. The Spanning Tree Protocol Port Configuration upper

Menu

In this upper and lower menu, you can assign spanning priority and

path cost to any port(s). A port with higher priority, lower path cost

is less likely\to be blocked if Spanning Tree Protocol is detecting

network loop.

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Figure 4-19. The Spanning Tree Protocol Port Configuration lower Menu

Port Statistics

Figure 4-20. The Port Statistics Menu

You can view the statistics information display in this screen

regarding a certain port by entering the port number in the port id

field. You can also refresh or reset the counter as you wish.

VLAN Configuration

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Figure 4-21. The Static VLAN Configuration Menu

(S) – Port(s) is set as static (fixed) member of the VLAN.

(D) – Port(s) is set as static (fixed) member of the VLAN and can

be registered as a dynamic VLAN member as well.

(C) – Port(s) is being both a static member and a dynamic member

of the VLAN.

Figure 4-22. The Dynamic VLAN Table Menu

This screen displays the VLAN mapping for port(s) that join the

VLAN(s) through Dynamic VLAN Registration.

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Figure 4-23. The Untagged Configuration Menu

All ports are set by default as Untagged in this switch system, to

change port(s) to Tagged just pick the port number you need and

select “No” from the Port Map.

Figure 4-24. The MTU/MDU Per Port VLAN Table in The VLAN
Configuration Menu

This screen as above only reflects the setting you made in Switch

Device Configuration menu - there is no change can be made here.

Should you set the VLAN Mode to <MTU/MDU> mode and <one

Uplink> port then

port 1 ~ 25 will be mapped to port 26 - the uplink port, otherwise,

port 1 ~ 12 and port 13 ~ 24 will be mapped to uplink port 25 and

port 26 accordingly.

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Figure 4-25. The Port Based VLAN Configuration in The VLAN
Configuration Menu

Select the VLAN entry to create, modifies, or deletes the VLAN

group. Choose the port(s) to the VLAN group

GARP Configuration

Figure 4-26. The GARP Configuration Menu

GARP (Generic Attribute Registration Protocol) defines the

architecture, rules of operation, state machines and variables for

the registration and de-registration of attribute values. It allows

dynamic filter entries for

VLAN membership to be distributed among the Forwarding

Databases of VLAN-aware switches. By joining GVRP (GARP

VLAN Registration Protocol), it helps maintaining VLAN

information. The rule of the aging scheme is:

GARP Leave All Time > GARP Leave Time > GARP Join Time

IGMP Configuration

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Figure 4-27. The IGMP Configuration Menu

Multicasting is used to support real-time applications such as video

conferencing or streaming audio. IGMP (Internet Group Multicast

Protocol) allows you to query for any attached hosts who want to

receive a specific multicast service. The switch looks up the IP

Multicast Group used for this service and adds any port, which

received a similar request to that group. It then propagates the

service request on to any neighboring multicast switch to ensure

that it will continue to receive the multicast service.

By supporting IGMP (Internet Group Management Protocol)

Snooping, the switch can forward multicast traffic intelligently.

Packets are forwarded to the ports that belong to the multicast

group instead of being

broadcast to all ports and possibly disrupting network performance.

This lookup table reflects the multicast group(s) (up to 32)

configuration of your system and provides an overview of the

port(s) map to each multicast group.

User Authentication

Figure 4-28. The User Authentication Menu

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You can change the password setting as in the user authentication

menu. You can also create user and assign different privilege to

suit your needs. After selecting an entry to add or modify, type in

user name and password, toggle the user privilege and then

update the changes

System Utility

System Restart

Figure 4-29. The System Restart Menu

As mention earlier, you need to perform either a Cold Start or

Warm Star to have the changes you made so that changes are

really saved and keep in effect until you make change to them

again.

Factory Reset

Figure 4-30. The Factory Reset Menu

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All selections in this menu are separate to be setup their own

default.

Login Timeout Interval

Figure 4-31. The Login Timeout Interval Menu

You can set up the time you need for the automatic log-out in

anytime.

System Download

Figure 4-31. The System Download Menu

Use TFTP download the code you need, and two code as Boot

code and System Software code for upgrading.

Update Setting

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Figure 4-32. The Update Setting Menu

You can save current settings by click the "Submit" checkbox .You

should reboot the system so that your current settings will take

effect.

5.
Network Configuration

This section provides you a few samples of network topology in
which LevelOne GSW-2490TXM SNMP Switch ( UTP/MT-RJ/VF­45, Intelligent ) is used.

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The Switch provides versatile configuration options for the network.
It is ideally suited as a workgroup or segment Switch in a network; it
has the flexibility to provide Switched 10Mbps to the desktop or
shared hubs, aggregate traffic from workgroup Switches, or provide
dedicated 100Mbps or 1000Mbps ( Gigabit ) to servers with
bandwidth-intensive applications. And because all Fast Ethernet
ports auto-negotiate for operation at 100 Mbps the Switch is
perfectly suited to an evolving network environment where demand
for network speed is increasing.

Collapsed Backbone Application

For small network where rapid growth can be expected in the near
future, this Switch is an ideal solution supporting backbone
connectivity.

The Switch can be used as a standalone Switch for a group of
heavy traffic users. Switching is brought to the desktop either
through a single end-station per Switch port or through a multi-port
Switch.
A 1000 Mbps server is connected to the Switch, providing end
stations high-speed accessibility to its applications. This
configuration provides dedicated 100 Mbps connections to the
network center, to the server, and up to 40 users ( while 2 Optional
8-port module are installed ).

When the network needs expansion, you can simply connect the
Switch to any IEEE 802.3 ( Ethernet ), IEEE 802.3u ( Fast Ethernet
) and 802.3ab ( Gigabit Ethernet ) compliant Switch utilizing the
Auto MDI/MDIX function. This Switch can also cooperate with a
wide range of networking devices (e.g., firewall routers and printer
servers) added to the network.

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Figure 5-1. Collapsed Backbone Application

Departmental Bridge

For enterprise networks where large data broadcasts are constantly
processed, this Switch is an ideal solution for department users to
connect to the corporate backbone. The LevelOne GSW-2490TXM
SNMP Switch used as segment Switch can alleviate user
contention for bandwidth and eliminate server and network
bottlenecks. All ports can connect to high-speed department servers
that need high bandwidth. This Switch provides parallel
communications within it’s Gigabit port, which can run up to 2000
Mbps at Full-duplex.

The Switch makes key servers available to more users by allowing
multiple conversations to occur concurrently, thereby significantly
expanding overall network throughput. Moreover, this Switch eases
supervision and maintenance by allowing network manager
centralize multiple servers in a single location.

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Figure 5-2: Departmental Bridge Application

NOTE: Full-duplex operation only applies to point-to-point access

(for example, when attaching the Switch to a workstation, server, or
another Switch). When connecting to hubs, use a standard
cascaded connection set for half-duplex operation.

High Performance Switched Workgroup

This Switch is also a good solution for connecting two workgroups,
supporting the throughput, for example, of 800Mbps. This
application is useful for power groups that need high bandwidth.

The most common LAN implementations use a combination of
standard switches, bridges and routers. The bridges and routers
quickly become bottlenecks, reducing overall network throughput.
Switching to higher-speed LANs such as FDDI or ATM is not a good
choice for most people.
However, such broadband equipment is still extremely expensive
and hard to maintain. Besides, you have to replace all existing
Ethernet cable and adapter cards, restructure your network, and

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implement more expensive administration procedures.

The Switch can provide the same bandwidth of FDDI and ATM at
much lower costs. In addition, all current adapters and network
devices can still be used. The Switching cross-domain connection is
better than bridge and router because users can retain LAN
structure in which any node can freely communicate with any other
node.

Figure 5-3: High Performance Switched Workgroup Application

IEEE 802.1Q VLAN Application

The Switch supports up to 128 Group, IEEE 802.1Q-compatible
virtual LAN ( VLANs ).

Port-based VLAN Workgroup

You can group the Switch ports into broadcast domains by
assigning them to the same VLAN to increase network capacity and
performance. With network segmentation, each Switch port
connects to a segment that is a single broadcast domain. Packets
received in one VLAN can only be forwarded within that VLAN.

VLAN allows the grouping of end stations logically, based not on
physical location but on business policies such as job function or
department. Members of a group can be dispersed throughout a
facility - they do not have to be connected in close physical
locations.

Hence, group members can coordinate their data communication
requirements regardless of the actual working locations; and the
logical network can extend to any point you want it to. Moreover,

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VLAN groups can be modified at any time to add, move or change
users without any re-cabling.

Figure 5-4: VLAN Workgroup Application

Shared Server

The Switch compliant to the IEEE802.1Q tagging VLAN standard
allows ports to exist in multiple VLANs for shared resources, such
as servers, printers, and Switch-to-Switch connections. It is also
possible to have resources exist in multiple VLANs on one Switch
as shown in the following figure.

Figure 5-5: Shared Server

In this example, stations on different VLANs share resources. As a
result, VLAN 1 and VLAN 2 can access VLAN 3 for printing. The
broadcasts from ports configured in VLAN3 can be seen by all

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VLAN port members of VLAN3.

6.
Product Specifications

This section provides the specifications of LevelOne GSW­2490TXM SNMP Switch, and the following table lists them.

Standards Compliance

IEEE802.3 10BASE-T
IEEE802.3u 100BASE-TX and 100BASE-FX
IEEE802.3ab 1000BASE-T
IEEE802.3z 1000BASE-SX
IEEE802.3x Flow Control
IEEE802.1p Priority Support
IEEE802.3ac Frame Extension for VLAN Tagging
IEEE802.1D spanning tree
IEEE802.1Q VLAN tagging

Protocol CSMA/CD
Media connector 100M FX, SC, MTRJ, VF45

Basic unit: 24 RJ-45 for STP or UTP,
Auto MDI/MDI-X Support
Gigabit SX/LX Module: 1 Duplex SC
Gigabit 1000T Module: 1 RJ-45 for UTP or STP,
Auto MDI/MDI-X Support
GBIC: Mini GBIC LC type, Standard GBIC SC type

Transfer Rate 14880 Packets per second for 10Mbps

148800 packets per second for 100Mbps
1488000 packets per second for 1000Mbps

Backplane Bandwidth 9.6Gb
Switch Technology Store-and-Forward Error Free Packet Forwarding

Scheme
Supports Hardware Level Broadcast Storm
Prevention without Consuming System CPU
Utilization

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MAC Address 8K MAC address with auto learning function
Data Buffer 6Mb share memory

LED System Power, per port Link/active,

FDX/Col,10/100Mbps
Gigabit Module Link/active, FDX/Col

Dimension 440mm(W)*225mm(D)*44.5mm(H)
Power 100~240 VAC 50/60HZ
EMI & Safety FCC Class A, CE, UL

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