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Cabletron Systems 2H253-25R 2.3 100BASE-TX NETWORK, 100BASE-TX Network, Network Requirements

Models: 2H253-25R

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100BASE-TX Network

100BASE-TX Network

2.3100BASE-TX NETWORK

The two RJ21 connectors on the front panel of the 2H253-25R each provide 12 ﬁxed ports (ports 1 through 24) that support 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 Cabletron Systems Cabling Guide for details.

NOTE

The ﬁxed ports of the 2H253-25R support Category 5 UTP cabling that has an impedance between 85 and 111 ohms.

The 2H253-25R is capable of operating at either 10 or 100 Mbps. When the port is conﬁgured for Auto-Negotiation, the 2H253-25R automatically senses the speed of the other device and adjusts its speed accordingly.

2-2Network Requirements

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Cabletron Systems 2H253-25R manual 2.3 100BASE-TX NETWORK, 100BASE-TX Network, Network Requirements

Contents

RESET 2H253-25R SmartSwitch Installation User’s GuideFAST ETHERNET WORKGROUP SWITCH 2H253-25RPage Only qualiﬁed personnel should perform installation procedures FCC NOTICE INDUSTRY CANADA NOTICEVCCI NOTICE CABLETRON SYSTEMS, INC PROGRAM LICENSE AGREEMENT Page CABLETRON SYSTEMS SALES AND SERVICE, INC PROGRAM LICENSE AGREEMENT 7. NO LIABILITY FOR CONSEQUENTIAL DAMAGES. IN NO EVENT SHALL CABLETRON OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS, PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR RELIANCE DAMAGES, OR OTHER LOSS ARISING OUT OF THE USE OR INABILITY TO USE THIS CABLETRON PRODUCT, EVEN IF CABLETRON HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, OR IN THE DURATION OR LIMITATION OF IMPLIED WARRANTIES IN SOME INSTANCES, THE ABOVE LIMITATION AND EXCLUSIONS MAY NOT APPLY TO YOU CABLETRON SYSTEMS LIMITED PROGRAM LICENSE AGREEMENT If the Program is exported from the United States pursuant to the License Exception TSR under the U.S. Export Administration Regulations, in addition to the restriction on transfer set forth in Sections 1 or 2 of this Agreement, You agree not to i reexport or release the Program, the source code for the Program or technology to a national of a country in Country Groups D1 or E2 Albania, Armenia, Azerbaijan, Belarus, Bulgaria, Cambodia, Cuba, Estonia, Georgia, Iraq, Kazakhstan, Kyrgyzstan, Laos, Latvia, Libya, Lithuania, Moldova, North Korea, the People’s Republic of China, Romania, Russia, Rwanda, Tajikistan, Turkmenistan, Ukraine, Uzbekistan, Vietnam, or such other countries as may be designated by the United States Government, ii export to Country Groups D1 or E2 as deﬁned herein the direct product of the Program or the technology, if such foreign produced direct product is subject to national security controls as identiﬁed on the U.S. Commerce Control List, or iii if the direct product of the technology is a complete plant o r any major component of a plant, export to Country Groups D1 or E2 the direct product of the plant or a major component thereof, if such foreign produced direct product is subject to national security controls as identiﬁed on the U.S. Commerce Control List or is subject to State Department controls under the U.S. Munitions List viiiDECLARATION OF CONFORMITY Page NETWORK REQUIREMENTS ContentsINTRODUCTION ABOUT THIS GUIDESPECIFICATIONS INSTALLATIONTROUBLESHOOTING OPTIONAL INSTALLATIONS AND MODE SWITCH BANK SETTINGSFigures xiiiLANVIEW LEDs TablesTroubleshooting Checklist COM Port Pin AssignmentsSTRUCTURE OF THIS GUIDE USING THIS GUIDEAbout This Guide Important NoticeEthernet Technology Guide Cabling Guide SmartTrunk User’s Guide HSIM-W6 Installation Guide HSIM-W84 Installation GuideRELATED DOCUMENTS WAN Series Local Management User’s GuideDOCUMENT CONVENTIONS The guide uses the following conventionsPage Introduction 1.1 OVERVIEWImportant Notice 1.1.1 Connectivity 1.1.2 Auto-Negotiation1.1.5 SmartTrunk 1.1.4 Full Duplex Switched Ethernet1.1.3 Runtime IP Address Discovery The 2H253-25R will reboot after RAD is successful1.1.6 Remote Monitoring RMON 1.1.7 Broadcast Suppression1.1.8 Port/VLAN Redirect Functions 1.1.9 Rate Limiting 1.1.10 Flow Control1.1.12 802.1 Port Priority 1.1.11 GARP Switch Operation1.1.14 Switching Options 1.1.13 Management1.1.16 Standards Compatibility 1.1.18 LANVIEW Diagnostic LEDs1.1.15 Optional HSIMs and VHSIMs 1.1.17 Year 2000 Compliant1.2 GETTING HELP anonymousyour email address Network Requirements 2.1 SmartTrunk2.2 10BASE-T NETWORK 2.3 100BASE-TX NETWORK 100BASE-TX Network2-2 Network Requirements Installation 3.1 UNPACKING THE DEVICE3.2 INSTALLING OPTIONS 3.3 INSTALLING THE DEVICETable 3-1 Contents of 2H253-25R Carton 3.3.1 Tabletop or Shelf Installation Guidelines for Tabletop and Shelf InstallationsInstallation 3.3.2 Rackmount Installation Guidelines for the Rackmount InstallationA = 15 cm 6 in B = 57 cm 22.5 in C = 53 cm 21 in D = 213 cm 7 ft Attaching the Strain-Relief Bracket InstallationRack mounting the 2H253-25R involves the following Rack Mounting the 2H253-25R 3.3.3 Connecting Power To connect the 2H253-25R to the power sources, proceed as follows3.4 CONNECTING TO THE NETWORK Figure 3-6 Straight Cable Connection Transmit TX3.5 COMPLETING THE INSTALLATION Troubleshooting 4.1 USING LANVIEWDevice electronics not Table 4-1 LANVIEW LEDs Cont’d Should ﬂash green every two 1. Refer to the SmartSwitch Series 4.2 TROUBLESHOOTING CHECKLISTRefer to the SmartSwitch Series 2E253, 2H252, 2H253, and 2H258Refer to the SmartSwitch Series Series 2E253, 2H252, 2H253, and2H258 Local Management User’s 2E253, 2H252, 2H253, and 2H258NVRAM Reset, was changed sometime before either cycling4.3 USING THE RESET BUTTON Figure 4-2 RESET ButtonA.1 DEVICE SPECIFICATIONS SpeciﬁcationsA.2 PHYSICAL PROPERTIES A.5 INPUT/OUTPUT PORTS A.3 ELECTRICAL SPECIFICATIONSA.4 ENVIRONMENTAL REQUIREMENTS 200-240 VacA.6 COM PORT PINOUT ASSIGNMENTS A.7 REGULATORY COMPLIANCEFCC Part 15, CSA C108.8, 89/336/EEC, EN Page Optional Installations and Mode Switch Bank Settings B.1 REQUIRED TOOLSB-2 Optional Installations and Mode Switch Bank Settings B.2 REMOVING THE CHASSIS COVERThis section describes how to remove the 2H253-25R chassis cover Removing the Chassis CoverTo remove the chassis cover, proceed as follows Screws Chassis Cover Front Panel Chassis B-4 Optional Installations and Mode Switch Bank SettingsRemoving the Chassis Cover Figure B-1 Removing the Chassis CoverB.3 SETTING THE MODE SWITCHES B.4 SIMM UPGRADE SIMM UpgradeB-6 Optional Installations and Mode Switch Bank Settings B.4.2 Installing the DRAM SIMM B.4.1 Locating SIMMsFigure B-4 Installing the DRAM SIMM UpgradeConnector Connector Teeth Clip Side Notch B-8 Optional Installations and Mode Switch Bank SettingsFigure B-5 HSIM and VHSIM Connector Locations B.5 INSTALLING OPTIONAL HSIM OR VHSIM INTERFACE MODULESInstalling Optional HSIM or VHSIM Interface Modules Optional Installations and Mode Switch Bank SettingsPage Index NumericsIndex Index-2