Cisco Systems 3120 manual Planning 10/100/1000 Ethernet Port Connections

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Chapter 2 Switch Installation

Planning 10/100/1000 Ethernet Port Connections

Note You can use the mdix auto interface configuration command in the CLI to enable the automatic medium-dependent interface crossover (auto-MDIX) feature. When the auto-MDIX feature is enabled, the switch module detects the required cable type for copper Ethernet connections and configures the interfaces accordingly. Therefore, you can use either a crossover or a straight-through cable for connections to a copper 10/100/1000 module port on the switch module, regardless of the type of device on the other end of the connection.

The auto-MDIX feature is enabled by default.

Step 2 Connect the other end of the cable to an RJ-45 connector on the other device. The port LED turns on when both the switch module and the connected device have established link.

The port LED is amber while Spanning Tree Protocol (STP) discovers the topology and searches for loops. This takes about 30 seconds, and then the port LED turns green. If the port LED does not turn on, the device at the other end might not be turned on, or there might be a cable problem or a problem with the adapter installed in the attached device. See Chapter 3, “Troubleshooting,” for solutions to cabling problems.

Step 3 Reconfigure and reboot the connected device if necessary.

Step 4 Repeat Steps 1 through 3 to connect each device.

Planning 10/100/1000 Ethernet Port Connections

The 10/100/1000 Ethernet ports use standard RJ-45 connectors with Ethernet pinouts. The maximum cable length is 328 feet (100 meters). The 100BASE-TX and 1000BASE-T traffic requires Category 5, Category 5e, or Category 6 UTP cable. The 10BASE-T traffic can use Category 3 or Category 4 cable.

The autonegotiation feature is enabled by default on the switch. At this setting, the switch ports configure themselves to operate at the speed of attached device. If the attached device does not support autonegotiation, you can explicitly set the switch port speed and duplex parameters. To maximize performance, either let the ports autonegotiate both speed and duplex, or set the port speed and duplex parameters on both ends of the connection.

For simplified cabling, the automatic medium-dependent interface crossover (auto-MDIX) feature is enabled by default on the switch. With auto-MDIX enabled, the switch detects the required cable type for copper Ethernet connections and configures the interface accordingly. Therefore, you can use either a crossover or a straight-through cable for connections to a switch 10/100/1000 Ethernet port regardless of the type of device on the other end of the connection.

See the switch software configuration guide or the switch command reference on Cisco.com for more information about enabling or disabling autonegotiation and auto-MDIX.

If auto-MDIX is disabled, use the guidelines in Table 2-1to select the correct cable for connecting the switch 10/100/1000 Ethernet ports to other devices. See the “Cable and Adapter Specifications” section on page B-4for cable-pinout descriptions.

 

 

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Contents Americas Headquarters MarchPage N T E N T S Setup Accessing the CLI Through the Console Port OL-12246-01 Purpose AudienceOrganization Related Publications ConventionsPreface OL-12246-01 Product Overview Switch Module Features OverviewPort Description UID 1 LEDSwitch Module Console Port Other FeaturesLRM 10/100/1000 PortsGigabit Ethernet Module Slots Cisco TwinGig Converter ModuleColor System Status LEDsSystem LED Stack LEDRJ-45 Uplink Port LEDs Stack Master LEDStack Member LED UID and Health LEDsGigabit Ethernet Module Slot Port LEDs X2 Module Installed Only the CBS3120X SwitchManagement Options Power ConnectorsStackWise Plus Ports Device Manager Using the Device ManagerNetwork Configurations Using the Command-Line InterfacePreparing for Installation Switch InstallationSafety Warnings Installation Guidelines Verifying Package Contents Rear View of the Blade Enclosure HP c-Class BladeSystem Enclosure ArchitectureStatement Installing the Switch Module in the Blade EnclosureOpen the Release Latch Switch Module IP Addresses Switch Installation Onboard Administrator Interconnect Bay Summary Window Express Setup Advanced Settings Table Using Express SetupEnter switch 1 priority Setting the Installed Switch Module As the Stack MasterRefreshing the PC IP Address Planning and Creating a Switch StackStack Cabling Configurations 250304 Connecting to the StackWise Plus Ports Installing Devices in the 10-Gigabit Ethernet Slots Installing a Transceiver or Converter Module Removing a Module 12 Installing X2 Transceiver Modules Installing an SFP Module Installing SFP ModulesRemoving an SFP Module 14 Converter Module with SFP Modules Installed15 Connecting to an Ethernet Port Connecting to the 10/100/1000 PortsPlanning 10/100/1000 Ethernet Port Connections Device Crossover Cable Where to Go NextSwitch Installation Where to Go Next Verify the Switch Module Post Results Diagnosing ProblemsEthernet and Fiber Cables Look at the Switch Module LEDsConfirm the Switch Module Connections Bad or Damaged CableSpanning Tree Loops SFP Module Port IssuesPort and Interface Settings Ping the End DeviceCabling Distance Verify the Switch Module PerformanceSpeed, Duplex, and Autonegotiation Autonegotiation and Network-Interface CardsReplacing a Failed Stack Member Clearing the Switch Module IP Address and Configuration250310 Locating the Switch Module Serial NumberOL-12246-01 Environmental Ranges Physical DimensionsOL-12246-01 Connector Specifications Connector and Cable SpecificationsConnecting to 1000BASE-T Devices Connecting to 10BASE-T- and 100BASE-TX-Compatible DevicesCisco TwinGig Converter Module Ports Gigabit Ethernet Module InterfacesMicrons MHz/km Distance Cable and Adapter SpecificationsGigabit Ethernet X2 Transceiver Module Cable Specifications Console PortTransmit X2 Product Transmit Power Receive Power NumberDBm Wavelength nm GLC-SX-MM SFP Module Cable SpecificationsTwo Twisted-Pair Cable Pinouts 1000BASE-SXTP3 Four Twisted-Pair Cable Pinouts for 1000BASE-T PortsDevice Switch Console RJ-45-to-DB-9 Port DTEIdentifying a Crossover Cable Console Port Adapter PinoutsSwitch Console RJ-45-to-DB-25 Port DTE OL-12246-01 Connecting to the Console Port Accessing the CLI Through the Console PortOL-12246-01 Figure C-1 Connecting through the Switch Module Console Port Completing the Initial Configuration To configure Snmp now, enter yes These choices appear CLI NumericsIN-2 Post UIDIN-4 LEDIN-5 IN-6
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