Cisco Systems 3120 manual Stack Cabling Configurations

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Chapter 2 Switch Installation

Planning and Creating a Switch Stack

•For conditions that might cause a stack master re-election or to manually elect the stack master, see the “Managing Switch Stacks” chapter in the switch module software configuration guide on Cisco.com.

•You can stack any combination of up to nine Catalyst 3120G and 3120X switches. You can stack only the Cisco Catalyst Blade Switch 3120 for HP switch modules; other switches are not supported.

•Before installation, verify the StackWise Plus cable length. Depending on your configuration, you might need different sized cables. The 1-meter cable is suppled if you do not specify the length of the StackWise Plus cable when you order your product. If you need the 0.5-meter cable or the

3-meter cable, you can order these StackWise Plus cables from your Cisco sales representative:

–CAB-STK-E-0.5M= (0.5-meter cable)

–CAB-STK-E-1M= (1-meter cable)

–CAB-STK-E-3M= (3-meter cable)

For switch module dimensions, StackWise Plus cable part numbers, and additional stacking guidelines, see the switch module hardware installation guide on Cisco.com. For concepts and procedures to manage switch stacks, see the switch module software configuration guide and the stack compatibility guide also on Cisco.com.

To create a switch stack:

•Install the member switch modules if you have not already done so.

•Connect the StackWise Plus cables as described in the “Planning and Creating a Switch Stack” section on page 2-13.

•Configure the member switch modules through the master switch by using the CLI.

Stack Cabling Configurations

This section describes the recommended configurations for stacking the switches by using the supplied 1-meter StackWise Plus cable.

Figure 2-8is an example of a recommended configuration in which two switch modules create a switch stack in a single blade enclosure.

Figure 2-8 Stacking Two Switch Modules in a Single Blade Enclosure to Create One Stack

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	Cisco Catalyst Blade Switch 3120 for HP Hardware Installation Guide
2-14	OL-12246-01

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Contents March Americas HeadquartersPage N T E N T S Setup Accessing the CLI Through the Console Port OL-12246-01 Purpose AudienceOrganization Conventions Related PublicationsPreface OL-12246-01 Switch Module Features Overview Product OverviewUID 1 LED Port DescriptionOther Features Switch Module Console PortCisco TwinGig Converter Module 10/100/1000 PortsGigabit Ethernet Module Slots LRMStack LED LEDsSystem LED Color System StatusUID and Health LEDs Stack Master LEDStack Member LED RJ-45 Uplink Port LEDsX2 Module Installed Only the CBS3120X Switch Gigabit Ethernet Module Slot Port LEDsManagement Options Power ConnectorsStackWise Plus Ports Using the Device Manager Device ManagerUsing the Command-Line Interface Network ConfigurationsSwitch Installation Preparing for InstallationSafety Warnings Installation Guidelines Verifying Package Contents HP c-Class BladeSystem Enclosure Architecture Rear View of the Blade EnclosureInstalling the Switch Module in the Blade Enclosure StatementOpen the Release Latch Switch Module IP Addresses Switch Installation Onboard Administrator Interconnect Bay Summary Window Using Express Setup Express Setup Advanced Settings TableSetting the Installed Switch Module As the Stack Master Enter switch 1 priorityPlanning and Creating a Switch Stack Refreshing the PC IP AddressStack Cabling Configurations 250304 Connecting to the StackWise Plus Ports Installing Devices in the 10-Gigabit Ethernet Slots Installing a Transceiver or Converter Module 12 Installing X2 Transceiver Modules Removing a ModuleInstalling SFP Modules Installing an SFP Module14 Converter Module with SFP Modules Installed Removing an SFP ModuleConnecting to the 10/100/1000 Ports 15 Connecting to an Ethernet PortPlanning 10/100/1000 Ethernet Port Connections Where to Go Next Device Crossover CableSwitch Installation Where to Go Next Diagnosing Problems Verify the Switch Module Post ResultsBad or Damaged Cable Look at the Switch Module LEDsConfirm the Switch Module Connections Ethernet and Fiber CablesPing the End Device SFP Module Port IssuesPort and Interface Settings Spanning Tree LoopsAutonegotiation and Network-Interface Cards Verify the Switch Module PerformanceSpeed, Duplex, and Autonegotiation Cabling DistanceClearing the Switch Module IP Address and Configuration Replacing a Failed Stack MemberLocating the Switch Module Serial Number 250310OL-12246-01 Physical Dimensions Environmental RangesOL-12246-01 Connector and Cable Specifications Connector SpecificationsConnecting to 10BASE-T- and 100BASE-TX-Compatible Devices Connecting to 1000BASE-T DevicesGigabit Ethernet Module Interfaces Cisco TwinGig Converter Module PortsConsole Port Cable and Adapter SpecificationsGigabit Ethernet X2 Transceiver Module Cable Specifications Microns MHz/km DistanceTransmit X2 Product Transmit Power Receive Power NumberDBm Wavelength nm 1000BASE-SX SFP Module Cable SpecificationsTwo Twisted-Pair Cable Pinouts GLC-SX-MMFour Twisted-Pair Cable Pinouts for 1000BASE-T Ports TP3Console Port Adapter Pinouts Switch Console RJ-45-to-DB-9 Port DTEIdentifying a Crossover Cable DeviceSwitch Console RJ-45-to-DB-25 Port DTE OL-12246-01 Accessing the CLI Through the Console Port Connecting to 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 Numerics CLIIN-2 UID PostLED IN-4IN-5 IN-6

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