LevelOne GSW-2476 - Manuals

C OMPLIANCES vii Warnings and Cautionary Messages Environmental Statement The manufacturer of this product endeavours to sustain an environmentally-friendly policy throughout the entire production process. This is achieved though the following means:• Adherence to national legislation and regulation...

C OMPLIANCES viii This guide details the hardware features of this switch, including Its physical and performance-related characteristics, and how to install the switch. Audience This guide is for system administrators with a working knowledge of network management. You should be familiar with switc...

ix T ABLE OF C ONTENTS 1 About GSW-2476 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Switch Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

T ABLE OF C ONTENTS xi VLAN Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5- 28 QOS Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 3 Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

xiii T ABLES Table 1-1 Port Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Table 1-2 Power Status LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Table 4-1 Maximum 1000BASE-T Gigabit Ethernet Cable Length . . . . 4-6Table 4-2 Maximum 1...

xiv F IGURES Figure 1-1 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Figure 1-2 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Figure 1-3 Port LEDs and Power LED . . . . . . . . . . . . . . . . . . . . . . . 1-4 Fig...

F IGURES xv Figure 5- 19 Trunk Membership . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 7 Figure 5-2 0 Trunk Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 8 Figure 5-2 1 VLAN Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 1 Fi...

1-1 C HAPTER 1 A BOUT GSW-2476 Overview LevelOne GSW-2476 is an intelligent Layer 2 switch with 24 10/100/1000BASE-T ports, four of which are combination ports * that are shared with four SFP transceiver slots (see Figure 1-1, Ports 21-24). Figure 1-1 Front Panel Figure 1-2 Rear Panel * If an SFP tr...

A BOUT GSW-2476 1-2 Switch Architecture The switch employs a wire-speed, non-blocking switching fabric. This permits simultaneous wire-speed transport of multiple packets at low latency on all ports. The switch also features full-duplex capability on all ports, which effectively doubles the bandwidt...

D ESCRIPTION OF H ARDWARE 1-3 Description of Hardware 10/100/1000BASE-T Ports The switch contains 24 RJ-45 ports that operate at 10 Mbps or 100 Mbps, half or full duplex, or at 1000 Mbps, full duplex. Because all ports on the switch support automatic MDI/MDI-X operation, you can use straight-through...

A BOUT GSW-2476 1-4 Figure 1-3 Port LEDs and Power LED Table 1-1 Port Status LEDs LED Condition Status Fast Ethernet Ports (Ports 1-24) Link/Act (Link/Activity) On/Flashing Green Port has established a valid network connection. Flashing indicates activity. Off There is no valid link on the port. 100...

F EATURES AND B ENEFITS 1-5 Power Supply Socket The power socket is located on the rear panel of the switch. The standard power socket is for the AC power cord. Figure 1-4 Power Supply Socket Features and Benefits Connectivity • 24 10/100/1000 Mbps ports for easy Gigabit Ethernet integration and for...

A BOUT GSW-2476 1-6 Expandability • 4 Small Form Factor Pluggable (SFP) transceiver slots (shared with 1000BASE-T ports) • Supports 1000BASE-SX, 1000BASE-LX and 1000BASE-ZX SFP transceivers. Performance • Transparent bridging. • Provides store-and-forward switching • Supports Jumbo frames up to 9.6 ...

2-1 C HAPTER 2 N ETWORK P LANNING Introduction to Switching A network switch allows simultaneous transmission of multiple packets via non-crossbar switching. This means that it can partition a network more efficiently than bridges or routers. Switches have, therefore, been recognized as one of the m...

N ETWORK P LANNING 2-2 Application Examples GSW-2476 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. Collapsed Backbone GSW-2476 is an excellent choice for mixed Ethernet, Fast...

A PPLICATION E XAMPLES 2-3 Central Wiring Closet With 24 parallel bridging ports (i.e., 24 distinct collision domains), this switch can collapse a complex network down into a single efficient bridged node, increasing overall bandwidth and throughput. In the figure below, the 1000BASE-T RJ-45 ports o...

N ETWORK P LANNING 2-4 Remote Connections with Fiber Cable Fiber optic technology allows for longer cabling than any other media type. A 1000BASE-SX (MMF) link can connect to a site up to 550 meters away, a 1000BASE-LX (SMF) link up to 10 km, and a 1000BASE-ZX link up to 70 km. This allows a switch ...

A PPLICATION E XAMPLES 2-5 Making VLAN Connections The switch supports VLANs that can be used to organize any group of network nodes into separate broadcast domains. VLANs confine broadcast traffic to the originating group, and can eliminate broadcast storms in large networks. This provides a more s...

N ETWORK P LANNING 2-6 Application Notes 1. Full-duplex operation only applies to point-to-point access (such as when a switch is attached to a workstation, server or another switch). When the switch is connected to a hub, both devices must operate in half-duplex mode. 2. For network applications th...

3-1 C HAPTER 3 I NSTALLING THE S WITCH Selecting a Site GSW-2476 can be mounted in a standard 19-inch equipment rack 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 outle...

I NSTALLING THE S WITCH 3-2 Ethernet Cabling To ensure proper operation when installing the switches into a network, make sure that the current cables are suitable for 10BASE-T, 100BASE-TX or 1000BASE-T operation. Check the following criteria against the current installation of your network: • Cable...

E QUIPMENT C HECKLIST 3-3 Equipment Checklist After unpacking GSW-2476 unit, 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 • GSW-2476 • Four adhesive foot pads...

I NSTALLING THE S WITCH 3-4 • 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 (see page C-2). • Mechanical Loading: Do not place any equipment on...

M OUNTING 3-5 To rack-mount devices: 1. Attach the brackets to the device using the screws provided in the Bracket Mounting Kit. Figure 3-2 Attaching the Brackets 2. Mount the device in the rack, using four rack-mounting screws (not provided). Figure 3-3 Installing the Switch in a Rack 21 22 23 24 S...

I NSTALLING THE S WITCH 3-6 3. If installing a single switch only, turn to “Connecting to a Power Source” at the end of this chapter. 4. If installing multiple switches, mount them in the rack, one below the other, in any order. Desktop or Shelf Mounting 1. Attach the four adhesive feet to the botto...

I NSTALLING AN SFP T RANSCEIVER 3-7 Installing an SFP Transceiver Figure 3-5 Inserting an SFP Transceiver into a Slot The switch supports the following optional transceivers:• 1000BASE-SX (GVT-0300) • 1000BASE-LX (GVT-0301 ) • 1000BASE-ZX (GVT-0302) To install an SFP transceiver, do the following: 1...

I NSTALLING THE S WITCH 3-8 Connecting to a Power Source To connect a device to a power source: 1. Insert the power cable plug directly into the socket located at the back of the device. Figure 3-6 Power Socket 2. Plug the other end of the cable into a grounded, 3-pin, AC power source. Note: For int...

4-1 C HAPTER 4 M AKING N ETWORK C ONNECTIONS Connecting Network Devices GSW-2476 is designed to interconnect multiple segments (or collision domains). It can be connected to network cards in PCs and servers, as well as to hubs, switches or routers. It may also be connected to devices using optional ...

M AKING N ETWORK C ONNECTIONS 4-2 Connecting to PCs, Servers, Hubs and Switches 1. Attach one end of a twisted-pair cable segment to the device’s RJ-45 connector. Figure 4-1 Making Twisted-Pair Connections 2. If the device is a PC card and the switch is in the wiring closet, attach the other end of ...

T WISTED -P AIR D EVICES 4-3 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. 1. Attach one end of a p...

M AKING N ETWORK C ONNECTIONS 4-4 Fiber Optic SFP Devices An optional Gigabit SFP transceiver (1000BASE-SX, 1000BASE-LX or 1000BASE-ZX) 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 fibe...

F IBER O PTIC SFP D EVICES 4-5 3. 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. Figure 4-3 Making Connections to SFP Transceivers 4. As a connection is ...

M AKING N ETWORK C ONNECTIONS 4-6 Connectivity Rules When adding hubs (repeaters) to your network, please follow the connectivity rules listed in the manuals for these products. However, note that because switches break up the path for connected devices into separate collision domains, you should no...

C ONNECTIVITY R ULES 4-7 100 Mbps Fast Ethernet Collision Domain 10 Mbps Ethernet Collision Domain Table 4-3 Maximum 1000BASE-LX Fiber Optic Cable Length Fiber Diameter Fiber Bandwidth Cable Length Range Connector 9/125 micron single-mode fiber N/A 2 m - 10km (7 ft - 6.4 miles) LC Table 4-4 Maximum ...

M AKING N ETWORK C ONNECTIONS 4-8 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. Doing so will enable you to easily locate inter-connected devices, isolate faults and change...

5-1 C HAPTER 5 C ONFIGURING THE S WITCH Using the Web Interface This switch provides an embedded HTTP web agent. Using a web browser you can configure the switch and view statistics to monitor network activity. The web agent can be accessed by any computer on the network using a standard web browser...

C ONFIGURING THE S WITCH 5-2 Navigating the Web Browser Interface To access the web-browser interface you must first enter a password. The user has read/write access to all configuration parameters and statistics. The default password for the switch is “admin.” Note: If user input is not detected wi...

N AVIGATING THE W EB B ROWSER I NTERFACE 5-3 Configuration Options Configurable parameters have a dialog box or a drop-down list. Once a configuration change has been made on a page, be sure to click on the Apply button to confirm the new setting. The following table summarizes the web page configur...

C ONFIGURING THE S WITCH 5-4 Main Menu Using the onboard web agent, you can define system parameters, manage and control the switch, and all its ports, or monitor network conditions. The following table briefly describes the selections available from the web-browser interface. Table 5-2 Switch Main ...

N AVIGATING THE W EB B ROWSER I NTERFACE 5-5 PORTS 5-21 Settings Configure the speed and duplex mode of the port. 5-21 Storm Control Sets the broadcast storm control parameters. 5-23 Port Mirroring Sets up the port mirroring features of the switch to enable traffic monitoring. 5-24 Cable Diagnostic ...

C ONFIGURING THE S WITCH 5-6 Web Configuration Displaying Status Overview You can easily identify the system by displaying the device name, location and contact information. Field Attributes System Information • System Name – Name assigned to the switch system. • Number of Ports – Number of built-in...

W EB C ONFIGURATION 5-7 • Speed/Duplex Status – Shows the current speed and duplex mode. • 10hdx : 10 Mbps half duplex. • 10fdx : 10 Mbps full duplex. • 100hdx : 100 Mbps half duplex. • 100fdx : 100 Mbps full duplex. • 1000fdx : 1000 Mbps full duplex. • Flow Control Status – Indicates whether flow c...

C ONFIGURING THE S WITCH 5-8 Web – Click STATUS, Overview. Figure 5-3 Switch Information

W EB C ONFIGURATION 5-9 Showing Port Statistics You can display statistics on network traffic from the ports. These statistics can be used to identify potential problems with the switch (such as a faulty port or unusually heavy loading). All values displayed have been accumulated since the last syst...

W EB C ONFIGURATION 5-13 Web – Click STATUS, Statistics. Figure 5-4 Port Statistics Displaying System Name You can easily identify the system by displaying the device name. Field Attributes • Switch Name – Name assigned to the switch system.

C ONFIGURING THE S WITCH 5-14 Web – Click System, Name. Figure 5-5 System Name Setting the Switch’s IP Address This section describes how to configure an IP interface for management access over the network. The IP address for this switch is 192.168.2.10 by default. To manually configure an address, ...

W EB C ONFIGURATION 5-15 Manual Configuration Web – Click System, LAN Settings. Enter the IP address, subnet mask and gateway, then click APPLY. Note that if you change the switch IP address, you must close the web interface and start a new session using the new IP address. Figure 5-6 LAN Settings C...

C ONFIGURING THE S WITCH 5-16 Web – Click System, Password. To change the password for the administrator, enter current password, the new password, confirm it by entering it again, then click APPLY. Figure 5-7 Password Settings Tools On the Tools page, you can restore the switch to default settings,...

C ONFIGURING THE S WITCH 5-18 Upload/Download ConfigurationWeb – Click SYSTEM, Tools, Upload/Download Configuration. To upload or download the configuration file, select "Upload/Download Configuration" from the Tools drop-down list, then click "Upload" or "Download", and then...

W EB C ONFIGURATION 5-19 Restart SwitchWeb – Click SYSTEM, Tools, Restart Switch. To restart the switch, select from the Tools drop-down list, and then click APPLY. The reset will be complete when the user interface displays the login page. Figure 5-12 Restart Switch Static MAC Switches store the MA...

C ONFIGURING THE S WITCH 5-20 Web – Click System, Static MAC. Enter the MAC address, VLAN ID, then click ADD button to add a new static MAC address. Figure 5-13 Static MAC Address Configuration Counter Config This page allows specific statistics to be selected for monitoring. It is possible to monit...

W EB C ONFIGURATION 5-21 Web – Click System, Counter Config Figure 5-14 Counter Configuration Port Configuration You can use the Port Configuration page to manually fix the speed, duplex mode, and flow control. Field Attributes • Enable Jumbo Frames – Click to enable or disable Jumbo Frames. • Speed...

W EB C ONFIGURATION 5-23 Storm Control Broadcast storms may occur when a device on your network is malfunctioning, or if application programs are not well designed or properly configured. If there is too much broadcast traffic on your network, performance can be severely degraded or everything can c...

C ONFIGURING THE S WITCH 5-24 Web – Click PORTS, Storm Control. This page enables you to set the broadcast storm control parameters for every port on the switch. Figure 5-16 Port Broadcast Control Port Mirroring You can mirror traffic from any source port to a target port for real-time analysis. You...

W EB C ONFIGURATION 5-25 switch, which means they will not reach the mirror port or their intended destination port. Input rate-limiting in conjunction with port flow-control should be used to ensure that the total ingress bandwidth never exceeds the egress bandwidth. Web – Click PORTS, Port Mirrori...

C ONFIGURING THE S WITCH 5-26 • Cable Status – Shows the cable length, operating conditions and isolates a variety of common faults that can occur on Category 5 twisted pair cabling. Web – Click PORTS, Port Mirroring. Figure 5-18 Cable Diagnostics Trunks Membership This page allows you to create a m...

W EB C ONFIGURATION 5-27 • Trunk T1-T8 – These columns correspond to the eight trunks that are supported by the switch. To assign a port to a trunk, click on the radio button in the corresponding column, then click APPLY. Web – Click TRUNKS, Membership. To assign a port to a trunk, click the require...

C ONFIGURING THE S WITCH 5-28 • Flow Control – Allows flow control to be enabled or disabled. When the box is checked, flow control is enabled. • Ports – Indicates which ports belong to the trunk. Web – Click TRUNKS, Settings. Figure 5-20 Trunk Configuration VLAN Settings This page allows you to cre...

W EB C ONFIGURATION 5-29 • The switch management interface is on VLAN 1 (this cannot be changed) • All ports have a Port VLAN ID (PVID) of 1 • All ports can send and receive both VLAN-tagged and untagged packets (that is, they are hybrid ports) In the default configuration, any port is able to send ...

C ONFIGURING THE S WITCH 5-30 For QinQ operation, a customer port should be set to VLAN unaware and a provider port (trunk port) should be set to VLAN aware. • QinQ – A QinQ enabled port will accept packets up to 1526 bytes in length, which means double tag header frames can be accepted. QinQ should...

W EB C ONFIGURATION 5-31 Web – Click VLANS, VLAN Settings. Fill in the required settings for each interface, click Apply. Figure 5-21 VLAN Settings VLAN Memembership You can create up to 255 VLANs based on 802.1Q standard and delete VLANs (Virtual LANs) to change the VLAN membership and behaviour of...

C ONFIGURING THE S WITCH 5-32 Web – Click VLANS, VLAN Membership. To add a new , type into the VLAN ID (1-4095) of the VLAN group you want the new group to be, then click Add to open up the 802.1Q VLAN Group window, on which you can configure VLAN membership. Figure 5-22 802.1Q VLAN Configuration Fi...

W EB C ONFIGURATION 5-33 QOS Settings QoS (Quality of Service) is a mechanism that is used to prioritize certain traffic as it is forward through the switch. Traffic can be classified as High or Normal priority and, when the switch is heavily loaded, it is the Normal priority packets that are droppe...

C ONFIGURING THE S WITCH 5-34 The Differentiated Services Code Point (DSCP) is a six-bit field that is contained within an IP (TCP or UDP) header. The six bits allow the DSCP field to take any value in the range 0 - 63 inclusive. When QoS Mode is set to DSCP, the DSCP Configuration table is displaye...

C ONFIGURING THE S WITCH 5-36 IGMP Snoop The switch can use Internet Group Management Protocol (IGMP) to filter multicast traffic. IGMP Snooping monitors IGMP service requests passing between multicast clients and servers, and dynamically configures the ports which need to recieve the mulitcast traf...

A-1 A PPENDIX A T ROUBLESHOOTING Diagnosing Switch Indicators Table A-1 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. • Contact LevelOne Technical Support. Link LED is Off • Ver...

T ROUBLESHOOTING A-2 Power and Cooling Problems 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,...

R ESET THE S WITCH A-3 Reset the Switch As situation requires, you might want to reset the switch and to restore to the default settings. To reset the switch: 1. Unplug the power cord from the power socket. 2. Unplug all cables from the ports. 3. Use an Ethernet cable to connect port 1 to port 2. 4....

B-1 A PPENDIX B C ABLES Twisted-Pair Cable and Pin Assignments For 10BASE-T/100BASE-TX connections, a 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, o...

C ABLES B-2 10BASE-T/100BASE-TX Pin Assignments Use unshielded twisted-pair (UTP) or shielded twisted-pair (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 an...

T WISTED -P AIR C ABLE AND P IN A SSIGNMENTS B-3 Straight-Through 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 auto-negotiation is enabled for any RJ-45 port on the switch, yo...

C ABLES B-4 Crossover Wiring If the twisted-pair cable is to join two ports and either both ports are labeled with an “X” (indicating MDI-X) or neither port is labeled with an “X” (which indicates MDI), a crossover must be implemented in the wiring. (When auto-negotiation is enabled for any RJ-45 po...

C ABLES B-6 Note that when testing your cable installation, be sure to include all patch cables between switches and end devices. 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 basica...

C-1 A PPENDIX C S PECIFICATIONS Physical Characteristics Ports 20 10/100/1000BASE-T, with auto-negotiation4 10/100/1000BASE-T shared with 4 SFP transceiver slots. Network Interface Ports 1-24: RJ-45 connector, auto MDI/X 10BASE-T: RJ-45 (100-ohm, UTP cable; Category 3 or better)100BASE-TX: RJ-45 (10...

S PECIFICATIONS C-2 Size 44.0 x 17.1 x 4.3 cm (17.0 x 6.7 x 1.7 in.) Temperature Operating: 0 to 40 °C (32 to 104 °F)Storage: -40 to 70 °C (-40 to 158 °F) Humidity Operating: 10% to 90% (non-condensing) AC Input 100 to 240 V, 50-60 Hz, 0.8 A Power Supply Internal, auto-ranging transformer: 100 to 24...

S TANDARDS C-3 Software Loading HTTP in-band Standards IEEE 802.3-2005 Ethernet, Fast Ethernet, Gigabit Ethernet IEEE 802.1Q Virtual LANIEEE 802.1X, Port-Based Network Access Control, 2001 ISO/IEC 8802-3 Compliances CE Mark Emissions FCC Class A

Glossary-1 G LOSSARY 10BASE-T IEEE 802.3 specification for 10 Mbps Ethernet over two pairs of Category 3 or better UTP cable. 100BASE-TX IEEE 802.3u specification for 100 Mbps Fast Ethernet over two pairs of Category 5 or better UTP cable. 1000BASE-LX IEEE 802.3z specification for Gigabit Ethernet o...

G LOSSAR Y Glossary-3 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 El...

G LOSSAR Y Glossary-4 Layer 2 Data Link layer in the ISO 7-Layer Data Communications Protocol. This is related directly to the hardware interface for network devices and passes on traffic based on MAC addresses. LED Light emitting diode used for monitoring a device or network condition. Link Segment...

G LOSSAR Y Glossary-5 Redundant Power Supply (RPS) A backup power supply unit that automatically takes over in case the primary power supply should fail. RJ-45 Connector A connector for twisted-pair wiring. Switched Ports Ports that are on separate collision domains or LAN segments. TIA Telecommunic...

Index-1 Numerics 10 Mbps connectivity rules 4-7100 Mbps connectivity rules 4-71000 Mbps connectivity rules 4-61000BASE-LX fiber cable lengths 4-71000BASE-SX fiber cable lengths 4-61000BASE-T pin assignments B-5ports 1-3 1000BASE-ZX fiber cable lengths 4-7100BASE-TX cable lengths 4-7ports 1-3 10BASE-...