Manuale d’uso / di manutenzione del prodotto MR2228-S2C del fabbricante MRV Communications
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MR2228-S2C Stackable Fast Ethernet Switch Installation Guide Installation GMMMMMM.
2 I n s t a l l a t i o n G u i d e Stackable Fast Ethernet Switch with 24 10BASE-T/100BASE-TX (RJ-45) Ports,2 1000BASE- T Combin ation Ports (RJ-45/SFP),and 2 1000BA SE-T/Stacking Ports MR2228-S2C.
1 Contents Chapter 1: Introduc tion........................................................................................................ .... 1 Overview ...............................................................................................
2 Power and Cooli ng Problem s ........................................................................................ 27 Installa tion ..................................................................................................................
1 Chapter 1: Introduction Overview The MR2228-S2C switch is a stack able Fast Ethernet switch with 24 10BASE-T/100BASE-TX ports and two 1000BASE-T ports that operate in combination with two Small Form Factor Pluggable (SFP) transceiver slots. The switch also provides two 1 Gbps built-i n stacking ports for connecting up to eight units in one stack.
2 Network Management Options With a comprehensive arrangment of LEDs, the MR2228-S2C provides “at a glance” monitoring of network and port status. The switch can be managed over the network with a web browser or Telnet app lication, or via a direct connection to the console port.
3 Stacking Ports The unit provides two stacking ports t hat provide a 1 Gbps stack backplane connection. Up to eight switches can be connected together using Category 5 Ethernet cables (purchased separately). The Master button enables one switch in the stack to be selected as the master.
4 Table 1-1. Port Status LEDs LED Condition Status Fast Ethernet Ports (Ports 1-24) On/Flashing Amber Port has established a valid 10 Mbps network connection. Flashing indicates activity. On/Flashing Green Port has established a valid 100 Mbps network connection.
5 Table 1-2. System Status LEDs LED Condition Status On Green The unit’s internal power supply is operating normally. On Amber The unit’s internal power supply has failed. PWR Off The unit has no power connected. On Green The system diagnostic test has completed successfully.
6 power receptacle is for the AC power co rd. The receptacle l abeled “RPU” is for the optional Redundant Power Unit (RPU). Features and Benefits Connectivity • 24 dual-speed ports for easy Fast Ethernet integration and for protection of your investment in legacy LAN equipment.
7 • Switching table with a total of 8K MAC address entries • Provides store-and-forward switching • Wire-speed filtering and forwarding • Supports flow control, using back pre ssure for half duplex and IEEE 802.
8 Chapter 2: Network Planning Introduction to Switching A network switch allows simultaneous transmission of multiple packets via non-crossbar switching.
9 transceiver. In the figure below, the swit ch is operating as a collapsed backbone for a small LAN.It is providing dedicated 10 Mbps full-duplex connections to workstations and 100 Mbps full-duplex conn ections to power users and servers. Figure 2-1.
10 Figure 2-2. Network Aggregation Plan Remote Connections with Fiber Cable Fiber Optic Technology allows for longer cabling than any other media type.
11 Figure 2-3. Remote Connect ions with Fiber Cable Making VLAN Connections This switch supports VLANs which can be used to organize any group of network nodes into separate broadcast domains. VLANs confine broadcast traffic to the originating group, and can e liminate broadcast storms in large networks.
12 Figure 2-4. Making VLAN Connections Note: When connecting to a switch that does not support IEEE 802.1Q VLAN tags, Use untagged ports . 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).
13 Chapter 3: Installing the Switch Selecting a Site Switch units can be mounted in a standard 19-inch equipment rack or on a flat surface. Be sure to follow the guide lines 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.
14 Figure 3-1. RJ-45 Connections Equipment Checklist After unpacking this switch, check the contents to be sure you have received all the components. Then, before beginning the installati on, be sure you have all other necessary installation equipment.
15 Rack Mounting Before rack mounting the switch, pay particu lar attention to the following factors: • Temperature: Since the te mperature within a rack assembly may be higher than the ambient room temperature, check t hat the rack-environment temperature is within the specified operating temperature range.
16 3. If installing a single switch only, turn to “Connecting to a Power Source” at the end of this chapter. 4. If installing multiple s witches, mount them in the rack, one below the other, in any order. Desktop or Shelf Mounting 1. Attach the four adhesive feet to the bottom of the first switch.
17 Installing an Optional SFP Transceiver Figure 3-5. Installing an SF P Transceiver into a slot To install an SFP transceiver, do the following: 1. Consider network and cabling requi rements to select an appropriate SFP transceiver type. 2. Insert the transceiver with the optic al connector facing outward and the slot connector facing down.
18 reboot. 2. Plug one end of a stack cable into the “Up” (right) port of the top unit. 3. Plug the other end of the st ack cable into the “Down” (left) port of the next unit.
19 Figure 3-7. Power Receptacles 2. Plug the other end of t he cable into a grounded, 3-pi n socket, AC power source. Note: For International use, you may need to change the AC line cord. You must use a line cord set that has been approved fo r the receptacle type in your country.
20 Table 3-1. Seri al Cable Wiring Switch’s 9-Pin Serial Port Null Modem PC’s 9-Pin DTE Port 2 RXD (receive data) <-------------- ---------- ---- 3 TXD (transmit data) 3 TXD (transmit data) ---.
21 Chapter 4: Making Network Connections Connecting Network Devices The MR2228-S2C is designed to be conne cted to 10, 100 or 1000 Mbps network cards in PCs and servers, as well as to other switches and hubs. It may also be connected to remote devices usin g optional 1000BASE- SX, 1000BASE-LX, or 1000BASE-LH SFP transceivers.
22 Figure 4-1. Making Twis ted-Pair Connections 2. 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.
23 Figure 4-2. Network Wiring Connections Fiber Optic SFP Devices An optional Gigabit SFP transceiver (1000BASE-SX, 1000BASE-LX, or 1000BASE-LH) can be used for a backbone connection between switches, or for connecting to a high-speed server.
24 transmitted through the cable and lead to degraded performance on the port. 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.
25 Category 5 cabling for running 1000BASE- T is a simple test of the cable installation to be sure that it complies with the IEEE 802.3ab standards. 1000 Mbps Gigabit Ethernet Collision Domain T able 4-1.
26 cables and to record where each cable is connected. Doing so will enable you to easily locate inter-connected devices, is olate faults and change your topology without need for unnecessary time consumption. To best manage the physical implementatio ns of your network, follow these guidelines: • Clearly label the oppos ing ends of each cable.
27 Appendix A: Troubleshooting Diagnosing Switch Indicators Table A-1. Troubl eshooting Chart Symptom Action PWR LED is Off •Check connections between the switch, the power cord and the wall outlet. •Contact your dealer for assistance. PWR LED is Amber Internal power supply has failed.
28 Installation 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 envir onment where you are sure that all the other components are functioning properly.
29 Appendix B: Cables Twisted-Pair Cable and Pin Assignments Caution: DO NOT plug a phone jack connector into any RJ-45 port. Use only twisted-pair cables with RJ-45 connectors that conform with FCC st andards. For 10/100BASE-TX connections, the twisted-pair cable must have two pairs of wires.
30 Table B-1. 10/100BASE-TX MD I and MDI-X Port Pinouts Pin 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 .
31 1000BASE-T Pin Assignments All 1000BASE-T ports suppor t automatic MDI/MDI-X operation, so you can use straight-through cables for all network connect ions to PCs or servers, or to other switches or hubs. The table below shows the 1000BASE- T MDI and MDI-X port pinouts.
32 Cable Testing for Existing Category 5 Cable Installed Category 5 cabling must pass te sts for Attenuation, Near-End Crosstalk (NEXT), and Far-End Crosstalk (FEXT).
33 Appendix C: Specifications Physical Characteristics Ports 24 10/100BASE-TX, with auto-negotiation Two 10/100/1000BASE-T shared with two SFP transceiver slots Two 10/100/1000BASE-T or Stacki ng Port.
34 Forwarding Mode Store-and-forward Throughput Wire speed Flow Control Full Duplex: IEEE 802.3x Half Duplex: Back pressure Management Features In-Band Management Telnet, SNMP, or HTTP Out-of-Band Management RS-232 DB-9 console port Software Loading TFTP in-band, or XModem out-of-band Standards IEEE 802.
35 IEEE 802.3z specification for Gigabit Et hernet over two st rands of 50/125, 62.5/125 or 9/125 micron core fiber cable. 1000BASE-LH Specification for long-haul Gigabit Ethernet over two strands of 9/125 micron core fiber cable. 1000BASE-T IEEE 802.
36 method and physical layer specifications. IEEE 802.3ab Defines CSMA/CD access method and physical layer specifications for 1000BASE-T Gigabit Ethernet. IEEE 802.3u Defines CSMA/CD access method and physical layer specifications for 100BASE-TX Fast Ethernet.
37 VLAN serves as a logical workgroup wit h no physical barriers, allowing users to share information and resources as though located on the same LAN..
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il MRV Communications MR2228-S2C è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del MRV Communications MR2228-S2C - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso MRV Communications MR2228-S2C imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul MRV Communications MR2228-S2C ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il MRV Communications MR2228-S2C, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del MRV Communications MR2228-S2C.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il MRV Communications MR2228-S2C. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo MRV Communications MR2228-S2C insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
