MRV Communications MR2228-S2C User's Manual
Contents
1. On Flashing Port has established a valid 10 100 Mbps network Amber connection Flashing indicates activity On Flashing Port has established a valid 1000 Mbps network Green connection Flashing indicates activity Off There is no valid link on the port MR2228 S2C O a g9 S ve CO 25 OO 28 o 27 o E 020 Cp a e Se Figure 1 4 System LEDs Table 1 2 System Status LEDs LED Condition Status PWR On Green The unit s internal power supply is operating normally On Amber The unit s internal power supply has failed Off The unit has no power connected Diag On Green The system diagnostic test has completed successfully Flashing The system diagnostic test is in progress Green On Amber The system diagnostic test has detected a fault RPU Green A redundant power unit is attached and is in backup or active mode Amber There is a fault in the redundant power unit Off There is no redundant power unit currently attached Stack Flashing An initial power on state during which the stack Amber configuration is detected Green This switch is acting as the Master unit in the stack Amber This switch is acting as a Slave unit in the stack Flashing When the user enters the light unit command in Green the CLI the unit ID of each switch in the stack will be displayed by the port LEDs 1 to 8 Power Supply Receptacles There are two power r2. 1 Attach one end of a twisted pair cable segment to the device s RJ 45 connector 21 Figure 4 1 Making Twisted 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 Otherwise attach the other end to an available port on the switch Make sure each twisted pair cable does not exceed 100 meters 328 ft in length Note Avoid using flow control on a port connected to a hub unless it is actually required to solve a problem Otherwise back pressure jamming signals may degrade overall performance for the segment attached to the hub 3 As each connection is made the Link LED on the switch corresponding to each port will light to indicate that the connection is valid Network Wiring Connections Today the punch down block is an integral part of many of the newer equipment racks It is actually part of the patch panel Instructions for making connections in the wiring closet with this type of equipment follows 1 Attach one end of a patch cable to an available port on the switch and the other end to the patch panel 2 If not already in place attach one end of a cable segment to the back of the patch panel where the punch down block is located and the other end to a modular wall outlet 3 Label the cables to simplify future troubleshooting See
3. 1000BASE T Pin Assignments on page B 3 Stacking Ports The unit provides two stacking ports that 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 This is the unit through which you manage the entire stack The stacking ports can also be used as normal Ethernet ports in standalone mode by pressing the Uplink button Master Button Uplink Button ZAMRV MR2228 S2C Stacking Ports Figure 1 2 Stacking Ports Port and System Status LEDs The MR2228 S2C base unit includes a display panel for key system and port indications that simplify installation and network troubleshooting The LEDs which are located on the front panel for easy viewing are shown below and described in the following tables Port Status LEDs Figure 1 3 Port LEDs Table 1 1 Port Status LEDs LED Condition Status Fast Ethernet Ports Ports 1 24 Link Activity On Flashing Port has established a valid 10 Mbps network Amber connection Flashing indicates activity On Flashing Port has established a valid 100 Mbps network Green connection Flashing indicates activity Off There is no valid link on the port Gigabit Ethern implemented et Ports Ports 25 26 and Ports 27 28 when stacking is not Link Activity
4. Z4MRV MR2228 S2C Stackable Fast Ethernet Switch Installation Guide Installation Guide Stackable Fast Ethernet Switch with 24 10BASE T 100BASE TX RJ 45 Ports 2 1000BASE T Combination Ports RJ 45 SFP and 2 1000BASE T Stacking Ports MR2228 S2C Contents Chapter 1 Introduction eene nnn enne nnne nenne nennen nnne nnne 1 oir DT 1 Switch Architecture EE 1 Network Management Options enne nnne 2 Description of e Elte VC 2 10BASE T 100BASE TX Porte 2 1000BASE T SEPF Ports gendi n tet e p tti ases eb Eege ELSE eeh 2 Ee alle Den CEET 3 Port and System Status LEDS cece ceeeeeeeeeeaeeeeeeeeseeeeieaeeeseeeeeeneeas 3 Power Supply Receptacles cccccececccceceeeeeeeeene cece ceeeeeeeceaeaeeeseeeeeeeceaaeeeeeeeeteneees 5 Features and Beneflts sicer foe deed ee eret gels Hol socer eda 6 CONnNe GtiVity ose eec ree itus tal Danois ec Pens eebe b redet coe de 6 Expandablilily 5 ette E ee I peered EH 6 Performance net bete bu Pd etam Ebr Te o teda ex ens ee en 6 Management 7 Chapter 2 Network Planning 8 Introduction to Gwitchinmg em nennen nennen nnne nnne 8 Application Tue 8 Collapsed Backbone 2 cet ten eee eerie e ederet es 8 Network Aggregation Plan 9 Remote Connections with Fiber Cable sssssssssseeen 10 Making VLAN Connections ene eene nennen 11 Application e 12 Chapter 3 Installing the Gwitch ette rern tnne eree ne 13 e ue ERT 13 Ethernet Cablingi ne tet aes a
5. 4 Bi directional Data Three Plus Bi directional Data Four Plus BI_D3 BI_D4 5 Bi directional Data Three Minus Bi directional Data Four Minus BI_D3 BI_D4 6 Bi directional Data Two Minus Bi directional Data One Minus BI_D2 Bl D1 7 Bi directional Data One Plus Bi directional Data One Plus Bl D i BI_D3 8 Bi directional Data Four Minus Bi directional Data Three Minus BI_D4 BI_D3 31 Cable Testing for Existing Category 5 Cable Installed Category 5 cabling must pass tests for Attenuation Near End Crosstalk NEXT and Far End Crosstalk FEXT This cable testing information is specified in the ANSI TIA EIA TSB 67 standard Additionally cables must also pass tests that_are specified in the ANSI TIA EIA TSB 95 Bulletin The Additional Transmission Performance Guidelines for 100 Ohm 4 Pair Category 5 Cabling Note that when testing your cable installation be sure to include all patch cables between switches and end devices Adjusting Existing Category 5 Cabling to Run 1000BASE T If your existing Category 5 installation does not meet one of the test parameters for 1000BASE T there are basically three measures that can be applied to try and correct the problem 1 Replace any Category 5 patch cables with high performance Category 5e or Category 6 cables 2 Reduce the number of connectors used in the link 3 Reconnect some of the connectors in the link Fiber Standards The current TIA Tel
6. Cable Labeling and Connection Records on page 4 7 22 Switch Equipment Rack side view 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 Each single mode fiber port requires 9 125 micron single mode fiber optic cable with an LC connector at both ends Each multimode fiber optic port requires 50 125 or 62 5 125 micron multimode fiber optic cabling with an LC connector at both ends WARNING This switch uses lasers to transmit signals over fiber optic cable The lasers are compliant with the requirements of a Class 1 Laser Product and are inherently eye safe in normal operation However you should never look directly at atransmit port when it is powered on 1 Remove and keep the LC port s rubber plug When not connected to a fiber cable the rubber plug should be replaced to protect the optics 2 Check that the fiber terminators are clean You can clean the cable plugs by wiping them gently with a clean tissue or cotton ball moistened with a little ethanol Dirty fiber terminators on fiber optic cables will impair the quality of the light 23 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 Si
7. 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 Table 4 1 Maximum 1000BASE T Gigabit Ethernet Cable Length Cable Type Maximum Cable Length Connector Category 5 5e or 6 100 ohm 100 m 328 ft RJ 45 UTP or STP Table 4 2 Maximum 1000BASE SX Gigabit Ethernet Cable Lengths Fiber Size Fiber Bandwidth Maximum 62 5 125 micron multimode 160 MHz km 2 220 m 7 722ft LC fiber 200 MHz km 2 275 m 7 902ft LC 50 125 micron multimode 400 MHz km 2 500 m 7 1641ft LC fiber 500 MHz km 2 550 m 7 1805ft LC Table 4 3 Maximum 1000BASE LX Gigabit Ethernet Cable Length Fiber Size Fiber Bandwidth Maximum Cable Connector Length 9 125 micron N A 2 m 5 km 7 LC single mode fiber ft 3 2miles Table 4 4 Maximum 1000BASE LH Gigabit Ethernet Cable Length Fiber Size Fiber Bandwidth Maximum 9 125 micron N A 2 m 70 km 7 LC single mode fiber ft 43 5miles 100 Mbps Fast Ethernet Collision Domain Table 4 5 Maximum Fast Ethernet Cable Lengths Type Cable Type Max 100BASE TX Category 5 or ohm UTP or STP 100 45 better 100 m 328 ft RJ 10 Mbps Ethernet Collision Domain Table 4 6 Maximum Ethernet Cable Length Cable Type Maximum Twisted Pair Category 3 or better 100 ohm UTP 100 m 328 ft
8. and empowers multimedia applications with multicast switching and CoS services Figure 1 1 Front and Rear Panels Switch Architecture The MR2228 S2C 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 bandwidth of each connection The switch uses store and forward switching to ensure maximum data integrity With store and forward switching the entire packet must be received into a buffer and checked for validity before being forwarded This prevents errors from being propagated throughout the network The switch includes built in stacking ports that enable up to eight units that can be connected together through a 1 Gbps stack backplane The switch stack can be managed from a master unit using a single IP address 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 application or via a direct connection to the console port The switch includes a built in network management agent that allows it to be managed in band using SNMP or RMON Groups 1 2 3 9 protocols It also has an RS 232 serial port DB 9 connector on the front panel for out of band management A PC may be connected to thi
9. bandwidth is specified in units of MHz per km which indicates the amount of bandwidth supported by the fiber for a one km distance Media Access Control MAC A portion of the networking protocol that governs access to the transmission medium facilitating the exchange of data between network nodes MIB An acronym for Management Information Base It is a set of database objects that contains information about the device Network Diameter Wire distance between two end stations in the same collision domain RJ 45 Connector A connector for twisted pair wiring Switched Ports Ports that are on separate collision domains or LAN segments TIA Telecommunications Industry Association Transmission Control Protocol Internet Protocol TCP IP Protocol suite that includes TCP as the primary transport protocol and IP as the network layer protocol UTP Unshielded twisted pair cable Virtual LAN VLAN A Virtual LAN is a collection of network nodes that share the same collision domain regardless of their physical location or connection point in the network A 36 VLAN serves as a logical workgroup with no physical barriers allowing users to share information and resources as though located on the same LAN 37
10. complex network down into a single efficient bridged node increasing overall bandwidth and throughput When up to eight switch units are stacked together they form a single virtual switch containing up to 208 ports The whole stack can be managed through the Master unit using a single IP address In the figure below the 10BASE T 100BASE TX ports on the switch are providing 100 Mbps connectivity for up to 24 segments In addition the switch is also connecting several servers at 1000 Mbps TIU E DU I M ug S PPO e 1000 Mbps Segments a j 4 P al 10 100 Mbps Fa P Segments 3 ae a Server Parm Figure 2 2 Network Aggregation Plan Remote Connections with Fiber Cable Fiber Optic Technology allows for longer cabling than any other media type A 1000BASE SX SFP transceiver can be used for a high speed connection between floors in the same building and a 1000BASE LX SFP transceiver can be used to connect to other buildings in a campus setting For long haul connections a 1000BASE LH SFP transceiver can be used to reach another site up to 70 kilometers away The figure below illustrates this switch connecting multiple segments with fiber cable Headquarters Jr 1000BASE LH SMF 70 kilometers UPCMTCYNTU ECUES Y Y Y pU mA p SS SC Y 9 sl e Sorvor Farm 1000BASE LX SMF 5 kilometers d Switch T T s ER a ize e E B5 ES ET Figur
11. forward switching Wire speed filtering and forwarding Supports flow control using back pressure for half duplex and IEEE 802 3x for full duplex Broadcast storm control Management At a glance LEDs for easy troubleshooting Network management agent Manages switch in band or out of band Supports Telnet SNMP RMON and web based interface Chapter 2 Network Planning 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 The switch has therefore been recognized as one of the most important building blocks for today s networking technology When performance bottlenecks are caused by congestion at the network access point such as the network card for a high volume file server the device experiencing congestion server power user or hub can be attached directly to a switched port And by using full duplex mode the bandwidth of the dedicated segment can be doubled to maximize throughput When networks are based on repeater hub technology the maximum distance between end stations is limited For Ethernet there may be up to four hubs between any pair of stations for Fast Ethernet the maximum is two This is known as the hop count However a switch turns the hop count back to zero So subdividing the network into smaller and more manageable segments and li
12. installed If one or more components appear to be malfunctioning such as the power cord or network cabling test them in an alternate environment where you are sure that all the other components are functioning properly In Band Access You can access the management agent in the switch from anywhere within the attached network using Telnet a web browser or other network management software tools However you must first configure the switch with a valid IP address subnet mask and default gateway If you have trouble establishing a link to the management agent check to see if you have a valid network connection Then verify that you entered the correct IP address Also be sure the port through which you are connecting to the switch has not been disabled If it has not been disabled then check the network cabling that runs between your remote location and the switch Note The management agent accepts up to four simultaneous Telnet sessions If the maximum number of sessions already exists an additional Telnet connection will not be able to log into the system Stack Troubleshooting If a stack fails to initialize or function first check the following items Check that all stacking cables are properly connected Check if any stacking cables appear damaged Check that the Master Select button is pressed in on only one unit in the stack Check that each unit has the stacking ports enabled the Stack button pushed out Che
13. repeaters and implementations that operate on fiber thin coax and twisted pair cable Fast Ethernet A 100 Mbps network communication system based on Ethernet and the CSMA CD access method Gigabit Ethernet A 1000 Mbps network communication system based on Ethernet and the CSMA CD access method Full Duplex Transmission method that allows two network devices to transmit and receive concurrently effectively doubling the bandwidth of that link IEEE Institute of Electrical and Electronic Engineers IEEE 802 3 Defines carrier sense multiple access with collision detection CSMA CD access 35 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 IEEE 802 3x Defines Ethernet frame start stop requests and timers used for flow control on full duplex links IEEE 802 3z Defines CSMA CD access method and physical layer specifications for 1000BASE Gigabit Ethernet LAN Segment Separate LAN or collision domain LED Light emitting diode used for monitoring a device or network condition Local Area Network LAN A group of interconnected computer and support devices Modal Bandwidth Bandwidth for multimode fiber is referred to as modal bandwidth because it varies with the modal field or core diameter of the fiber Modal
14. 000BASE LX 5 km 3 1 miles for singlemode fiber 1000BASE LH 70 km 43 5 miles for singlemode fiber However power budget constraints must also be considered when calculating the maximum cable length for your specific environment 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 guidelines below when choosing a location The site should be at the center of all the devices you want to link and near a power outlet be able to maintain its temperature within O to 40 C 32 to 104 F and its humidity within 596 to 9596 non condensing provide adequate space approximately two inches on all sides for proper air flow be accessible for installing cabling and maintaining the devices allow the status LEDs to be clearly visible Make sure twisted pair cable is always routed away from power lines fluorescent lighting fixtures and other sources of electrical interference such as radios and transmitters Make sure that the unit is connected to a separate grounded power outlet that provides 100 to 240 VAC 50 to 60 Hz is within 2 44 m 8 feet of each device and is powered from an independent circuit breaker As with any equipment using a filter or surge suppressor is recommended Ethernet Cabling To ensure proper operation when installing the switch into a network make sure that the current cables are su
15. 3 4 Attaching the Adhesive Feet 2 Set the device on a flat surface near an AC power source making sure there are at least two inches of space on all sides for proper air flow 3 If installing a single switch only go to Connecting to a Power Source at the end of this chapter 4 If installing multiple switches attach four adhesive feet to each one Place each device squarely on top of the one below in any order Installing an Optional SFP Transceiver Figure 3 5 Installing an SFP Transceiver into a slot To install an SFP transceiver do the following 1 Consider network and cabling requirements to select an appropriate SFP transceiver type 2 Insert the transceiver with the optical connector facing outward and the slot connector facing down Note that SFP transceivers are keyed so they can only be installed in one orientation 3 Slide the SFP transceiver into the slot until it clicks into place Note SFP transceivers are hot swappable The switch does not need to be powered off before installing or removing a transceiver However always first disconnect the network cable before removing a transceiver Connecting Switches in a Stack Figure 3 6 shows how the stack cables are connected between switches in a stack The connection uses only Category 5 Ethernet cables The switch supports a line and ring topology stacking configuration or can be used stand alone In line topology stacking there is a single stack cable connectio
16. 45 RJ Cable Labeling and Connection Records When planning a network installation it is essential to label the opposing ends of 25 cables and to record where each cable is connected Doing so will enable you to easily locate inter connected devices isolate faults and change your topology without need for unnecessary time consumption To best manage the physical implementations of your network follow these guidelines Clearly label the opposing ends of each cable Using your building s floor plans draw a map of the location of all network connected equipment For each piece of equipment identify the devices to which it is connected Note the length of each cable and the maximum cable length supported by the switch ports For ease of understanding use a location based key when assigning prefixes to your cable labeling Use sequential numbers for cables that originate from the same equipment Differentiate between racks by naming accordingly Label each separate piece of equipment Display a copy of your equipment map including keys to all abbreviations at each equipment rack 26 Appendix A Troubleshooting Diagnosing Switch Indicators Table A 1 Troubleshooting 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 Internal power supply has failed Contact your loca
17. ceive data 3 TXD transmit data 3 TXD transmit data 2 RXD receive data 5 SGND signal ground 5 SGND signal ground The serial port s configuration requirements are as follows Default Baud rate 9 600 bps Character Size 8 Characters Parity None Stop bit One Data bits 8 20 Chapter 4 Making Network Connections Connecting Network Devices The MR2228 S2C is designed to be connected 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 using optional 1000BASE SX 1000BASE LX or 1000BASE LH SFP transceivers Twisted Pair Devices Each device requires an unshielded twisted pair UTP cable with RJ 45 connectors at both ends Use Category 5 5e or 6 cable for 1000BASE T connections Category 5 or better for 100BASE TX connections and Category 3 or better for 1OBASE T connections Cabling Guidelines The RJ 45 ports on the switch support automatic MDI MDI X pinout configuration SO you can use standard straight through twisted pair cables to connect to any other network device PCs servers switches routers or hubs See Appendix B for further information on cabling IWARNING Do not plug a phone jack connector into an RJ 45 port This will damage the switch Use only twisted pair cables with RJ 45 connectors that conform to FCC standards Connecting to PCs Servers Hubs and Switches
18. ck that all switches in the stack are powered on After checking all items reboot all the switches in the stack 28 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 standards For 10 100BASE TX connections the twisted pair cable must have two pairs of wires For 1000BASE T connections the twisted pair cable must have four pairs of wires Each wire pair is identified by two different colors For example one wire might be green and the other green with white stripes Also an RJ 45 connector must be attached to both ends of the cable Caution Each wire pair must be attached to the RJ 45 connectors in a specific orientation See Cabling Guidelines on page 4 1 for an explanation The figure below illustrates how the pins on the RJ 45 connector are numbered Be sure to hold the connectors in the same orientation when attaching the wires to the pins Figure B 1 RJ 45 Connector Pin Numbers 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 any twisted pair connection does not exceed 100 meters 328 feet The RJ 45 ports on the switch base unit support au
19. e 2 3 Remote Connections 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 eliminate broadcast storms in large networks This provides a more secure and cleaner network environment VLANs can be based on untagged port groups or traffic can be explicitly tagged to identify the VLAN group to which it belongs Untagged VLANs can be used for small networks attached to a single switch However tagged VLANs should be used for larger networks and all the VLANs assigned to the inter switch links RAD n ua E e 1 fut 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 When the switch is connected to a hub both devices must operate in half duplex mode 2 Avoid using flow control on a port connected to a hub unless it is actually required to solve a problem Otherwise back pressure jamming signals may degrade overall performance for the segment attached to the hub 3 As a general rule the length of fiber optic cable for a single switched link should not exceed e 1000BASE SX 550 m 1805 ft for multimode fiber e 1
20. eceptacles on the rear panel of the switch The standard power receptacle is for the AC power cord The receptacle labeled RPU is for the optional Redundant Power Unit RPU RPU oC Figure 1 5 Power Supply Receptacles 100 240V 50 60Hz1 5A Features and Benefits Connectivity 24 dual speed ports for easy Fast Ethernet integration and for protection of your investment in legacy LAN equipment Auto negotiation enables each RJ 45 port to automatically select the optimum communication mode half or full duplex if this feature is supported by the attached device otherwise the port can be configured manually Independent RJ 45 10 100BASE TX ports with auto MDI MDI X Unshielded UTP cable supported on all RJ 45 ports Category 3 or better for 10 Mbps connections Category 5 or better for 100 Mbps connections and Category 5 be or 6 for 1000 Mbps connections IEEE 802 3 Ethernet 802 3u Fast Ethernet and 802 3z and 802 3ab Gigabit Ethernet compliance ensures compatibility with standards based hubs network cards and switches from any vendor Provides stacking capability via RJ 45 ports with 1 Gbps stacking bandwidth Up to 8 units can be stacked together Expandability e Supports 1000BASE SX 1000BASE LX and 1000BASE LH SFP transceivers Performance Transparent bridging Aggregate duplex bandwidth of up to 8 8 Gbps Switching table with a total of 8K MAC address entries Provides store and
21. ecommunications Industry Association 568 A specification on optical fiber cabling consists of one recognized cable type for horizontal subsystems and two cable types for backbone subsystems Horizontal 62 5 125 micron multimode two fibers per outlet Backbone 62 5 125 micron multimode or single mode TIA 568 B will allow the use of 50 125 micron multimode optical fiber in both the horizontal and backbone in addition to the types listed above All optical fiber components and installation practices must meet applicable building and safety codes 32 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 Stacking Ports button selection Network Interface Ports 1 24 RJ 45 connector auto MDI X 10BASE T RJ 45 100 ohm UTP cable Categories 3 or better 100BASE TX RJ 45 100 ohm UTP cable Category 5 or better 1000BASE T RJ 45 100 ohm UTP or STP cable Category 5 5e or 6 Buffer Architecture 4 Mbytes Aggregate Bandwidth 8 8 Gbps Switching Database 8K MAC address entries LEDs System PWR Power Supply Diag Diagnostic RPU Redundant Power Unit Stack Port status link speed and activity Weight 3 08 kg 6 Ibs 13 oz Size 44 0x23 0x4 4cm 17 32x9 06x1 73in Temperature Operating 0 C to 40 C 32 F to 104 F Storage 40 C to 70 C 40 F to 158 F Humidity Ope
22. epending on the type of screws used Mounting This switch can be mounted in a standard 19 inch equipment rack or on a desktop or shelf Mounting instructions for each type of site follow Rack Mounting Before rack mounting the switch pay particular attention to the following factors Temperature Since the temperature within a rack assembly may be higher than the ambient room temperature check that the rack environment temperature is within the specified operating temperature range See page C 1 Mechanical Loading Do not place any equipment on top of a rack mounted unit Circuit Overloading Be sure that the supply circuit to the rack assembly is not overloaded Grounding Rack mounted equipment should be properly grounded Particular attention should be given to supply connections other than direct connections to the mains 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 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 bottom of the first switch Figure
23. ion for Gigabit Ethernet over two strands 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 3ab specification for Gigabit Ethernet over 100 ohm Category 5 5e or 6 twisted pair cable using all four wire pairs Auto Negotiation Signalling method allowing each node to select its optimum operational mode e g speed and duplex mode based on the capabilities of the node to which it is connected Bandwidth The difference between the highest and lowest frequencies available for network signals Also synonymous with wire speed the actual speed of the data transmission along the cable Collision A condition in which packets transmitted over the cable interfere with each other Their interference makes both signals unintelligible Collision Domain Single CSMA CD LAN segment CSMA CD CSMA CD Carrier Sense Multiple Access Collision Detect is the communication method employed by Ethernet Fast Ethernet and Gigabit Ethernet End Station A workstation server or other device that does not forward traffic Ethernet A network communication system developed and standardized by DEC Intel and Xerox using baseband transmission CSMA CD access logical bus topology and coaxial cable The successor IEEE 802 3 standard provides for integration into the OSI model and extends the physical layer and media with
24. itable for 10BASE T 100BASE TX or 1000BASE T operation Check the following criteria against the current installation of your network Cable type Unshielded twisted pair UTP or shielded twisted pair STP cables with RJ 45 connectors Category 3 or better for 1OBASE T and Category 5 or better for 100BASE TX or 1000BASE T Protection from radio frequency interference emissions Electrical surge suppression Separation of electrical wires switch related or other and electromagnetic fields from data based network wiring Safe connections with no damaged cables connectors or shields RJ 45 nector 2 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 installation be sure you have all other necessary installation equipment Package Contents e Stackable Fast Ethernet Switch MR2228 S2C Four adhesive foot pads Bracket Mounting Kit containing two brackets and eight screws for attaching the brackets to the switch Power Cord either US Continental Europe or UK RS 232 console cable This Installation Guide e Management Guide Optional Rack Mounting Equipment If you plan to rack mount the switch be sure to have the following equipment available Four mounting screws for each device you plan to install in a rack these are not included A screwdriver Phillips or flathead d
25. l dealer for Amber assistance Diag LED is Power cycle the switch to try and clear the condition Amber elf the condition does not clear contact your dealer for assistance Stack LED is The stack has not completed its initial configuration Wait a Flashing Amber few minutes for the process to complete e If flashing continues check that the Master Select button is pressed in on only one switch Check that all stacking cables are properly connected Link LED is Off Verify that the switch and attached device are powered on Be sure the cable is plugged into both the switch and corresponding device If the switch is installed in a rack check the connections to the punch down block and patch panel Verify that the proper cable type is used and its length does not exceed specified limits Check the adapter on the attached device and cable connections for possible defects Replace the defective adapter or cable if necessary 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 power losses or surges at the power outlet If you still cannot isolate the problem the internal power supply may be defective 27 Installation Verify that all system components have been properly
26. labeled with an X MDI X or neither port is labeled with an X MDI a crossover must be implemented in the wiring When auto negotiation is enabled for any RJ 45 port on this switch you can use either straight through or crossover cable to connect to any device type EIA TIA 568B RJ 45 Wiring Standard 10 100BASE TX Crossover Cable White Orange Stripe White Green Stripe End B SE zll m Figure B 3 Crossover Wiring 1000BASE T Pin Assignments All 1000BASE T ports support automatic MDI MDI X operation so you can use straight through cables for all network connections to PCs or servers or to other switches or hubs The table below shows the 1000BASE T MDI and MDI X port pinouts These ports require that all four pairs of wires be connected Note that for 1000BASE T operation all four pairs of wires are used for both transmit and receive Use 100 ohm Category 5 5e or 6 unshielded twisted pair UTP or shielded twisted pair STP cable for 1000BASE T connections Also be sure that the length of any twisted pair connection does not exceed 100 meters 328 feet Table B 2 1000BASE T MDI and MDI X Port Pinouts Pin MDI Signal Name MDI X Signal Name 1 Bi directional Data One Plus Bi directional Data Two Plus BI_D1 BI_D2 2 Bi directional Data One Minus Bi directional Data Two Minus BI_D1 BI_D2 3 Bi directional Data Two Plus Bi directional Data One Plus BI_D2 BI_D1
27. n between each switch that carries two way communications across the stack In ring topology stacking an extra cable is connected between the top and bottom switches forming a ring or closed loop The closed loop cable provides a redundant path for the stack link so if one link fails stack communications can be maintained Figure 3 6 illustrates a ring topology stacking configuration To connect up to eight switches in a stack perform the following steps 1 Enable the stacking ports on each unit e the Stack button pushed out Note Pressing the Stack button during normal operation will cause the system to 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 stack cable into the Down left port of the next unit 4 Repeat steps 1 and 2 for each unit in the stack Form a simple chain starting at the Up port on the top unit and ending at the Down port on the bottom unit stacking up to 8 units 5 For ring topology stacking complete the connections by plugging one end of a stack cable into the Up port on the bottom unit and the other end into the Down port on the top unit E 2 Ko d Figure 3 6 Connecting Switches in a Ring topology Stack 6 Select the Master unit in the stack by pressing in the Master button on only oneof the switches Only one switch in the stack can operate as the Master all other units operate in slave mode If more than one switch i
28. n the stack is selected as Master or if no switches are selected the stack will not function Connecting to a Power Source To connect a switch to a power source 1 Insert the power cable plug directly into the AC receptacle located at the back of the switch RPU DC 100 240V 50 60Hz 1 5A Figure 3 7 Power Receptacles 2 Plug the other end of the cable into a grounded 3 pin 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 for the receptacle type in your country 3 Check the front panel LEDs as the device is powered on to be sure the PWR LED is lit If not check that the power cable is plugged in correctly 4 If you have purchased a Redundant Power Unit connect it to the switch and to an AC power source now following the instructions included with the package Connecting to the Console Port The DB 9 serial port on the switch s back panel is used to connect to the switch for out of band console configuration The command line driven configuration program can be accessed from a terminal or a PC running a terminal emulation program The pin assignments used to connect to the serial port are provided in the following table Figure 3 8 Serial Port DB 9 DTE Pin Out Wiring Map for Serial Cable Table 3 1 Serial Cable Wiring Switch s 9 Pin Serial Port Null Modem PC s 9 Pin DTE Port 2 RXD re
29. nce LC connectors are keyed the cable can be attached in only one orientation Figure 4 3 Making Fiber Port Connections 4 As aconnection is made check the Link LED on the switch corresponding to the port to be sure that the connection is valid The 1000BASE SX 1000BASE LX 1000BASE LH fiber optic ports operate at 1 Gbps full duplex with auto negotiation of flow control The maximum length for fiber optic cable operating at Gigabit speed will depend on the fiber type as listed under 1000 Mbps Gigabit Ethernet Collision Domain on page 4 5 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 not include the switch or connected cabling in your calculations for cascade length involving other devices 1000BASE T Cable Requirements All Category 5 UTP cables that are used for 1OOBASE TX connections should also work for 1000BASE T providing that all four wire pairs are connected However it is recommended that for all critical connections or any new cable installations Category 5e enhanced Category 5 or Category 6 cable should be used The Category 5e and 6 specifications include test parameters that are only recommendations for Category 5 Therefore the first step in preparing existing 24 Category 5 cabling for running
30. nking them to the larger network by means of a switch removes this limitation A switch can be easily configured in any Ethernet Fast Ethernet or Gigabit Ethernet network to significantly boost bandwidth while using conventional cabling and network cards Application Examples The MR2228 S2C 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 The MR2228 S2C is an excellent choice for mixed Ethernet and Fast Ethernet installations where significant growth is expected in the near future You can easily build on this basic configuration adding direct full duplex connections to workstations or servers When the time comes for further expansion just connect to another hub or switch using one of the Fast Ethernet or Gigabit Ethernet ports built into the front panel or using a Gigabit Ethernet port on a plug in SFP transceiver In the figure below the switch 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 connections to power users and servers Sorvora Workstations Worksiations 100 Mbps 100 Mbps 10 Mbps Full Duplex Full Duplex Full Duplex Figure 2 1 Collapsed Backbone Network Aggregation Plan With 28 parallel bridging ports i e 28 distinct collision domains the MR2228 S2C can collapse a
31. oa dees Asta erbe bt edendo ted 13 Equipment Checklist doeet eene eve hi neas uan a Leva ea De REEL nen Ee Dr EREKE 14 Package Contents xcov de wn eee ede dre es 14 Optional Rack Mounting Equipment eee 14 MOunting Resp po I DE 14 Rack Mounting citet p eteteet Hester obti eut ifa De etetaad bestes i eb obPedit inn 15 Desktop or Shelf Mountmg enne nnn 16 Installing an Optional SFP Transceiver een 17 Connecting Switches in a Stack eene nnn 17 Connecting to a Power Gource sss ener enne 18 Connecting to the Console Port 19 Wiring Map for Serial Cable neneeeeeeeererneeeeeterr treste trrrtnntesretrrrnrnrtererrrrrnn nnee ae 19 Chapter 4 Making Network Connections ccccceeeeeeeeeceeeceeeeeeeeeneaeeeeeeeeesesenseneeeeeeess 21 Connecting Network Devices cece eeeeeeeecneeceeeeeeeeeeeeeaeaeeeseeeeseeneesaneeeeeeeeees 21 Twisted Palr Re 21 Cabling Guidelnes cece eara aea eaa E aaea e aaraa ie 21 Connecting to PCs Servers Hubs and Gwitches 21 Network Wiring Connecthons eene 22 Fiber Optic SFP Devices A 23 Connectivity Files 5 te ette tete eM Lgs gedd ee beer Bate e aig 24 1000BASE T Cable Requirements eene 24 1000 Mbps Gigabit Ethernet Collision Domain sssssssessseseererrereeeeerrrrrereeeeereree 25 100 Mbps Fast Ethernet Collision Domain 25 10 Mbps Ethernet Collision Domain 25 Cable Labeling and Connection Records 25 Appendix A Troubleshooting cccccccccceeee cece eee e eter ree
32. r etre Heer 27 Diagnosing Switch Indicators eee eene 27 Power and Cooling Problems ssssessssssssseeeeeen eene rene 27 EC ue ET 28 IN Band ACCES Siranee aaa aE ea a aa aA E E aa aAa EE aA AE canteten 28 Stack Troubleshooting ed o corte Stadia E A ied eed 28 Appendix EMT 29 Twisted Pair Cable and Pin Assionments 29 10BASE T 100BASE TX Pin Assignments nneseeeseenereeeeseererrrrttrerreerrrnrnrererene 29 Straight Through Witng enne nnne 30 Crossover Wiring irte te tete Pa Peres Peeters ese e Rete do aa 30 1000BASE T Pin Assignments sse 31 PIbGr Standards ete E 32 Chapter 1 Introduction Overview The MR2228 S2C switch is a stackable 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 in stacking ports for connecting up to eight units in one stack The stacking ports can also be used as normal Ethernet ports in standalone mode The MR2228 S2C also includes an SNMP based management agent which provides both in band and out of band access for managing the switch The MR2228 S2C provides a broad range of powerful features for Layer 2 switching delivering reliability and consistent performance for your network traffic It brings order to poorly performing networks by segregating them into separate broadcast domains with IEEE 802 3Q compliant VLANs
33. rating 5 to 95 non condensing Specifications Power Supply Internal auto ranging transformer 100 to 240 VAC 50 to 60 Hz External supports connection for redundant power supply Power Consumption 70 Watts maximum Maximum Current 1 2 A 110 VAC 0 6 A 240 VAC Switch Features 33 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 3 Ethernet IEEE 802 3u Fast Ethernet IEEE 802 3z and 802 3ab Gigabit Ethernet IEEE 802 1D Bridging IEEE 802 3x full duplex flow control ISO IEC 8802 3 Compliances Emissions Industry Canada Class A EN55022 CISPR 22 Class A EN 61000 3 2 3 FCC Class A VCCI Class A C Tick AS NZS 3548 1995 Class A Immunity EN 61000 4 2 3 4 5 6 8 1 1 Safety CSA CUS CSA 22 2 950 amp UL 1950 EN60950 TUV GS IEC 60950 CB Glossary 10BASE T IEEE 802 3 specification for 10 Mbps Ethernet over two pairs of Category 3 4 or 5 UTP cable 100BASE FX IEEE 802 3 specification for 100 Mbps Ethernet over two strands of 50 125 62 5 125 micron or 9 125 micron core fiber cable 100BASE TX IEEE 802 3u specification for 100 Mbps Ethernet over two pairs of Category 5 UTP cable 1000BASE LX 34 IEEE 802 3z specificat
34. s port for configuration and monitoring out of band via a null modem serial cable See Appendix B for wiring options For a detailed description of the advanced features refer to the Management Guide Description of Hardware 10BASE T 100BASE TX Ports The MR2228 S2C base unit contains 24 10BASE T 100BASE TX RJ 45 ports All ports support automatic MDI MDI X operation so you can use straight through cables for all network connections to PCs or servers or to other switches or hubs See 10BASE T 100BASE TX Pin Assignments on page B 1 Each of these ports support auto negotiation so the optimum transmission mode half or full duplex and data rate 10 or 100 Mbps can be selected automatically If a device connected to one of these ports does not support auto negotiation the communication mode of that port can be configured manually Each port also supports IEEE 802 3x auto negotiation of flow control so the switch can automatically prevent port buffers from becoming saturated 1000BASE T SFP Ports These are combination Gigabit RJ 45 ports with shared Small Form Factor Pluggable SFP transceiver slots If an SFP transceiver purchased separately is installed in a slot and has a valid link on the port the associated RJ 45 port is disabled The 1000BASE T RJ 45 ports support automatic MDI MDI X operation so you can use straight through cables for all network connections to PCs or servers or to other switches or hubs See
35. tomatic MDI MDI X operation so you can use straight through cables for all network connections to PCs or servers or to other switches or hubs In straight through cable pins 1 2 3 and 6 at one end of the cable are connected straight through to pins 1 2 3 and 6 at the other end of the cable When using any RJ 45 port on this switch you can use either straight through or crossover cable 29 Table B 1 10 100BASE TX MDI 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 Receive Data plus RD Transmit Data plus TD 6 Receive Data minus RD Transmit Data minus TD 4 5 7 8 Not used Not used Note The and signs represent the polarity of the wires that make up each wire pair 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 this switch you can use either straight through or crossover cable to connect to any device type EIA TIA 568B RJ 45 Wiring Standard 10 100BASE TX Straight through Cable White Orange Stripe End A WW ON Em amp GN Figure B 2 Straight through Wiring Crossover Wiring If the twisted pair cable is to join two ports and both ports are
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