SMC Networks SMC8950EM, SMC8926EM Connecting Switches in a Stack, Making Stacking Connections

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Connecting Switches in a Stack 3

Connecting Switches in a Stack

Figure 3-7 shows how the stack cables are connected between switches in a stack. Each stacking connection is a 48 Gbps full-duplex high-speed serial link using proprietary stacking cables. The switch supports a line- and ring-topology stacking configuration, or can be used stand alone. To ensure minimal disruption in case a unit or stacking cable fails, we recommend always use a ring-topology.

In line-topology stacking there is a single stack cable connection 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 still be maintained. Figure 3-7 illustrates a ring-topology stacking configuration.

To connect up to eight switches in a stack, perform the following steps:

1.Plug one end of the stack cable (ordered separately) in the Down (right) port of the top unit.

2.Plug the other end of the stack cable into the Up (left) port of the next unit.

3.Repeat steps 1 and 2 for each unit in the stack. Form a simple chain starting at the Down port on the top unit and ending at the Up port on the bottom unit (stacking up to 8 units).

4.(Optional) To form a wrap-around topology, plug one end of a stack cable into the Down port on the bottom unit and the other end into the Up port on the top unit.

Figure 3-7 Making Stacking Connections

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Contents Installation Guide TigerStack II 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 Power Cord SafetyPower Cord Set France et Pérou uniquement Environmental Statement Documentation About This Guide Contents Making Network Connections Glossary Index Tables Figures Figures Overview IntroductionNetwork Management Options Switch ArchitectureIntroduction Condition Status Link Port Status LEDsActivity On/Flashing Green SpeedPower Supply Sockets Optional Redundant Power SupplyOptional Media Extender Modules Features and BenefitsExtender Module LEDs ConnectivityManagement ExpandabilityPerformance Introduction Network Planning Introduction to SwitchingCollapsed Backbone Application ExamplesNetwork Aggregation Plan Network Aggregation PlanRemote Connections with Fiber Cable Remote Connections with Fiber CableMaking Vlan Connections Making Vlan ConnectionsUsing Layer 3 Routing Application Notes Network Planning Ethernet Cabling Installing the SwitchSelecting a Site Optional Rack-Mounting Equipment Equipment ChecklistPackage Contents Rack Mounting MountingDesktop or Shelf Mounting Installing the Switch in a RackInstalling an Optional Module Installing an Optional Module into the SwitchInserting an SFP Transceiver into a Slot Installing an Optional SFP TransceiverMaking Stacking Connections Connecting Switches in a StackStacking Topologies Connecting to a Power SourceSerial Cable Wiring Switch’s 8-Pin Null Modem PC’s 9-Pin Connecting to the Console PortWiring Map for Serial Cable Installing the Switch Making Network Connections Connecting Network DevicesTwisted-Pair Devices Cabling GuidelinesNetwork Wiring Connections Connecting to PCs, Servers, Hubs and SwitchesFiber Optic SFP Devices Network Wiring ConnectionsMaking Connections to SFP Transceivers Gbps Fiber Optic ConnectionsConnecting to an XFP Transceiver Gbps Ethernet Collision Domain Connectivity Rules1000BASE-T Cable Requirements Mbps Ethernet Collision Domain Mbps Gigabit Ethernet Collision DomainMbps Fast Ethernet Collision Domain Cable Labeling and Connection Records Diagnosing Switch Indicators Appendix a TroubleshootingIn-Band Access Power and Cooling ProblemsInstallation Stack Troubleshooting Troubleshooting 10BASE-T/100BASE-TX Pin Assignments Appendix B CablesTwisted-Pair Cable and Pin Assignments Crossover Wiring Straight-Through Wiring1000BASE-T Pin Assignments Figure B-3 Crossover WiringFiber Standards Cable Testing for Existing Category 5 CableAdjusting Existing Category 5 Cabling to Run 1000BASE-T Non-Zero Dispersion-Shifted Dispersion-Shifted FiberNm Loss-Minimized Cables Physical Characteristics Appendix C SpecificationsTemperature WeightPower Supply Power ConsumptionStandards Switch FeaturesManagement Features Extender Modules Compliances10BASE-T GlossaryCSMA/CD Ieee TIA Numerics IndexIndex-2 Index-3 Index Index-4 Page 150200000054A R01

SMC8926EM, SMC8950EM specifications

SMC Networks has established itself as a prominent player in the networking and connectivity market, offering a range of professional solutions designed for small to medium-sized enterprises. Among its notable products are the SMC8950EM and the SMC8926EM, two advanced Ethernet switches that cater to the need for reliable and efficient networking.

The SMC8950EM is an enterprise-class managed switch that delivers high-performance capability with 48 10/100/1000Mbps Ethernet ports, providing extensive connectivity for various devices on a local area network. Its architecture is designed to handle high traffic loads, making it apt for environments where speed and reliability are paramount. This switch supports multiple protocols, including VLANs, which allow for flexible network segmentation and improved security. The SMC8950EM also features several Layer 2 and Layer 3 management protocols, enabling the switch to support advanced routing, Quality of Service (QoS), and network traffic management.

On the other hand, the SMC8926EM is a compact yet powerful switch equipped with 24 10/100/1000Mbps Ethernet ports, making it ideal for smaller installations or branch offices that require scalability without compromising on performance. With support for Power over Ethernet (PoE), the SMC8926EM simplifies the implementation of IP phones, security cameras, and wireless access points, making it particularly useful in environments where power outlets may be limited.

Both models employ advanced technologies, such as network storm control and link aggregation, to enhance performance and ensure seamless connectivity. They also provide comprehensive network monitoring capabilities, allowing administrators to manage traffic and troubleshoot issues proactively. The user-friendly web interface facilitates easier management and configuration, while SNMP support enables integration with existing network management systems for enhanced visibility and control.

Ultimately, the SMC8950EM and SMC8926EM represent robust networking solutions that address the challenges faced by modern enterprises. With their combination of high performance, advanced features, and scalability, these switches are well-suited for companies looking to build a reliable and efficient network infrastructure. Whether for a large organization or a small branch office, SMC Networks continues to deliver products that meet the evolving needs of users worldwide.
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