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, and empowers...
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.
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...
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Table 1-1. Port Status LEDs Condition Fast Ethernet Ports (Ports 1-24) (Link/Activity) On/Flashing Amber On/Flashing Green Gigabit Ethernet Ports (Ports 25-26 and Ports 27-28 when stacking is not implemented) (Link/Activity) On/Flashing Amber On/Flashing Green Status Port has established a valid 10 Mbps network connection.
Green Amber Flashing Green Power Supply Receptacles There are two power receptacles on the rear panel of the switch. The standard Status The unit’s internal power supply is operating normally. The unit’s internal power supply has failed. The unit has no power connected.
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. •...
• 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...
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.
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. When up to eight switch units are stacked together, they form a single “virtual”...
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.
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.
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.
• A screwdriver (Phillips or flathead, depending 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.) •...
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.
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.
Only one switch in the stack can operate as the Master, all other units operate in slave mode. If more than one switch in the stack is selected as Master, or if no switches are selected, the stack will not function.
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.
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Table 3-1. Serial Cable Wiring Switch’s 9-Pin Serial Port 2 RXD (receive data) 3 TXD (transmit data) 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 •...
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.
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.
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.
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.
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 Category 5, 5e, or 6 100-ohm UTP or STP Table 4-2.
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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.
• 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.
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.
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.) Crossover Wiring If the twisted-pair cable is to join two ports and both ports are labeled with an “X”...
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.
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.”...
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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...
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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)
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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).
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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.
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VLAN serves as a logical workgroup with no physical barriers, allowing users to share information and resources as though located on the same LAN.