Enterasys Networks 2H252-25R manual 100BASE-TX Network

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100BASE-TX Network

2.3100BASE-TX NETWORK

The fixed ports (ports 1 through 24) of the 2H252-25R provide an RJ45 connection that supports Category 5 UTP cabling. The device at the other end of the twisted pair segment must meet IEEE 802.3u 100BASE-TX Fast Ethernet network requirements for the devices to operate at 100 Mbps. Refer to the Enterasys Networks Cabling Guide for details.

NOTE: The fixed ports of the 2H252-25R support Category 5 UTP cabling that has an impedance between 85 and 111 ohms.

The 2H252-25R is capable of operating at either 10 or 100 Mbps. When the port is configured for Auto-Negotiation, the 2H252-25R automatically senses the speed of the other device and adjusts its speed accordingly.

2-2Network Requirements

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Contents 2H252-25R SmartSwitch Installation User’s Guide Page Page Vcci Notice FCC NoticeIndustry Canada Notice Class a ITE NoticeEnterasys NETWORKS, INC Program License Agreement Page Declaration of Conformity Page Contents Troubleshooting Figures Tables Structure of this Guide Using this GuideAbout This Guide Related Documents Document Conventions Guide uses the following conventionsPage Introduction OverviewConnectivity Runtime IP Address DiscoveryFull Duplex Switched Ethernet SmartTrunkPort/VLAN Redirect Functions Remote Monitoring RmonBroadcast Suppression Rate LimitingGarp Switch Operation Flow ControlManagement Switching Options11 802.1 Port Priority Optional HSIMs and VHSIMsYear 2000 Compliant Lanview Diagnostic LEDsStandards Compatibility Getting Help Your email addressNetwork Requirements 10BASE-T Network100BASE-TX Network Installation Unpacking the DeviceInstalling Options Guidelines for Tabletop and Shelf Installations Installing the DeviceTabletop or Shelf Installation InstallationRackmount Installation Guidelines for the Rackmount InstallationAttaching the Strain-Relief Bracket Rack Mounting the 2H252-25R Strain-Relief Bracket ScrewsRackmount Bracket Screws Connecting Power Redundant Primary AC outlets are On separate circuitsConnecting to the Network Connecting Twisted Pair Cables to Fixed PortsConnecting the Twisted Pair Segment Straight-Through Cable Completing the Installation Troubleshooting Using LanviewLanview LEDs PWR CPU FDX Troubleshooting Checklist Local Management User’s Guide2E253, 2H252, 2H253 SmartSwitch Series 2E253 Using the Reset Button Reset ButtonPage Physical Properties SpecificationsDevice Specifications INPUT/OUTPUT Ports Electrical SpecificationsEnvironmental Requirements COM Port Pinout Assignments Regulatory CompliancePage Optional Installations Mode Switch Bank Settings Required ToolsRemoving the Chassis Cover Optional Installations and Mode Switch Bank Settings B-3 Screws Chassis Cover Front Panel Setting the Mode Switches Figure B-2 Mode Switch Location6Optional Installations and Mode Switch Bank Settings Simm Upgrade Locating SIMMsInstalling the Dram Simm Installing Optional Hsim or Vhsim Interface Modules Figure B-5 Hsim and Vhsim Connector LocationsPage Index NumericsIndex-2