SMC Networks SMC8126PL2-F manual Switch Architecture, Power-over-Ethernet Capability

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1 Introduction

Switch Architecture

The SMC8126PL2-F employs a wire-speed, non-blocking switching fabric. This permits simultaneous wire-speed transport of multiple packets at low latency on all ports. It also features full-duplex capability on all ports, which effectively doubles the bandwidth of each connection.

This 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.

Power-over-Ethernet Capability

The switch’s 24 10/100/1000 Mbps ports support the Power-over-Ethernet (PoE) standard that enables DC power to be supplied to attached devices using wires in the connecting Ethernet cable. Any PoE compliant device attached to a port can directly draw power from the switch over the Ethernet cable without requiring its own separate power source. This capability gives network administrators centralized power control for devices such as IP phones and wireless access points, which translates into greater network availability.

For each attached PoE device, the switch automatically senses the load and dynamically supplies the required power. The switch delivers power to a device using wire pairs in the UTP or STP cable. Ports 1~4 can provide up to 30W of power, and ports 5~24 can provide up to 15.4W. Network devices such as IP phones, wireless access points, and network cameras, typically consume less than 10 W of power, so they are ideal for Power-over-Ethernet applications.

Network Management Options

The SMC8126PL2-F contains a comprehensive array of LEDs for “at-a-glance” monitoring of network and port status. It also includes a management agent that allows you to configure or monitor the switch using its embedded management software, or via SNMP applications. To manage this switch, you can make a direct connection to the console port (out-of-band), or you can manage the switch through

anetwork connection (in-band) using Telnet, the on-board web agent, or SNMP-based network management software.

For a detailed description of this switch’s advanced features, refer to the Management Guide.

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Contents Installation Guide TigerSwitch 10/100/1000 Installation Guide Page Warranty and Product Registration Compliances and Safety Warnings CE Mark Declaration of Conformance for EMI and Safety EEC Safety Compliance France and Peru only France et Pérou uniquement Francia y Perú únicamente Vii Advertencias y mensajes de precaución Purpose Page Contents Appendix a Troubleshooting Contents Tables Figures Xvi Front Panel Power-over-Ethernet Capability Switch ArchitectureNetwork Management Options SFP Slots Description of Hardware10/100/1000BASE-T Ports Port and System Status LEDsLED Optional Redundant Power Unit Mode PoE/Link ButtonPower Supply Socket Expandability Features and BenefitsConnectivity PerformanceIntroduction to Switching Network PlanningApplication Examples Collapsed BackboneNetwork Aggregation Plan Network Aggregation PlanRemote Connections with Fiber Cable Remote Connections with Fiber CableMaking Vlan Connections Making Vlan ConnectionsApplication Notes Selecting a Site Installing the SwitchEthernet Cabling Package Contents Equipment ChecklistOptional Rack-Mounting Equipment Mounting Rack MountingInstalling the Switch in a Rack Desktop or Shelf MountingInstalling an Optional SFP Transceiver Inserting an SFP Transceiver into a SlotConnecting to a Power Source Connecting to the Console PortWiring Map for Serial Cable Serial Cable Wiring Switch’s 8-Pin Null Modem PC’s 9-PinInstalling the Switch Twisted-Pair Devices Connecting Network DevicesMaking Network Connections Cabling GuidelinesConnecting to PCs, Servers, Hubs and Switches Network Wiring ConnectionsNetwork Wiring Connections Fiber Optic SFP DevicesConnectivity Rules Making Connections to SFP TransceiversMbps Gigabit Ethernet Collision Domain 1000BASE-T Cable RequirementsMbps Fast Ethernet Collision Domain Cable Labeling and Connection Records Mbps Ethernet Collision DomainDiagnosing Switch Indicators Appendix a TroubleshootingPower and Cooling Problems Installation In-Band AccessTwisted-Pair Cable and Pin Assignments Appendix B Cables10BASE-T/100BASE-TX Pin Assignments Straight-Through Wiring Crossover Wiring1000BASE-T Pin Assignments Twisted-Pair Cable and Pin Assignments BAdjusting Existing Category 5 Cabling to Run 1000BASE-T Cable Testing for Existing Category 5 CableFiber Standards Dispersion-Shifted Fiber Cables Appendix C Specifications Physical CharacteristicsSwitch Features Management FeaturesStandards CompliancesSpecifications Appendix D Ordering Information Ordering Information Glossary 10BASE-TCSMA/CD LED UTP Index NumericsIndex-2 Page 150200000032A R01