MR2228-S2C Stackable Fast Ethernet Switch Installation Guide Installation GMMMMMM
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 2
Contents Chapter 1: Introduction............................................................................................................ 1 Overview .......................................................................................................................... 1 Switch Architecture ................................................................................................... 1 Network Management Options .................................................................................
Power and Cooling Problems ........................................................................................ 27 Installation...................................................................................................................... 28 In-Band Access.............................................................................................................. 28 Stack Troubleshooting ...................................................................................................
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.
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.
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. Figure 1-2.
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.
LED PWR Diag RPU Stack Table 1-2. System Status LEDs Condition Status 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. 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. Green A redundant power unit is attached and is in backup or active mode.
power receptacle is for the AC power cord. The receptacle labeled “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. • 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.
• 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 pressure for half duplex and IEEE 802.
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.
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. 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 complex network down into a single efficient bridged node, increasing overall bandwidth and throughput.
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.
Figure 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.
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.
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.
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.
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.
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 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.
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.
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.
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.
Switch’s 9-Pin Serial Port 2 RXD (receive data) 3 TXD (transmit data) 5 SGND (signal ground) Table 3-1.
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.
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.
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.
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. Figure 4-3. Making Fiber Port Connections 4. As a connection is made, check the Link LED on the switch corresponding to the port to be sure that the connection is valid.
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 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.
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.
Appendix A: Troubleshooting Diagnosing Switch Indicators Table A-1. Troubleshooting Chart Symptom PWR LED is Off PWR LED is Amber Diag LED is Amber Stack LED is Flashing Amber Link LED is Off Action •Check connections between the switch, the power cord and the wall outlet. •Contact your dealer for assistance. Internal power supply has failed. Contact your local dealer for assistance. •Power cycle the switch to try and clear the condition.
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 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.
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.
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.
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.
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.
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 Bandwidt
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.
IEEE 802.3z specification 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.
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.
VLAN serves as a logical workgroup with no physical barriers, allowing users to share information and resources as though located on the same LAN.
