Cabletron Systems 2H253-25R manual Speciﬁcations, Device Specifications, Physical Properties

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A

Speciﬁcations

This appendix provides operating speciﬁcations for the Cabletron Systems 2H253-25R. Cabletron Systems reserves the right to change these speciﬁcations at any time without notice.

A.1 DEVICE SPECIFICATIONS
Processors:	Intel i960 RISC processor Power PC
Dynamic Random Access
Memory (DRAM):	20 MB expandable to 32 MB
FLASH Memory:	8 MB
Shared Memory:	4 MB

A.2 PHYSICAL PROPERTIES

Dimensions:	7.11H x 43.18W x 46.99D (cm)
	2.8H x 17W x 18.5D (in)
Approximate Weight (Unit):	8.18 kg (18 lb)
MTBF (Predicted):	200,000 hours

Speciﬁcations A-1

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Contents 2H253-25R SmartSwitch Installation User’s Guide Page Page FCC Notice Cabletron SYSTEMS, INC Program License Agreement Page Page Page Cabletron Systems Limited Program License Agreement Viii Declaration of Conformity Page Contents Troubleshooting Figures Tables About This Guide Using this GuideStructure of this Guide Xvi Related DocumentsDocument Conventions Document ConventionsPage Overview IntroductionAuto-Negotiation ConnectivityRuntime IP Address Discovery Full Duplex Switched EthernetSmartTrunk Broadcast Suppression Remote Monitoring RmonPort/VLAN Redirect Functions Flow Control Rate LimitingSwitching Options Garp Switch Operation12 802.1 Port Priority ManagementOptional HSIMs and VHSIMs Lanview Diagnostic LEDsStandards Compatibility Year 2000 CompliantGetting Help 10BASE-T Network Network Requirements100BASE-TX Network Unpacking the Device InstallationInstalling the Device Installing OptionsGuidelines for Tabletop and Shelf Installations Tabletop or Shelf InstallationGuidelines for the Rackmount Installation Rackmount InstallationAttaching the Strain-Relief Bracket Rack Mounting the 2H253-25R Redundant Primary AC outlets are On separate circuits Connecting PowerConnecting to the Network Straight Cable Connection Completing the Installation Using Lanview TroubleshootingPWR CPU FDX OFF Troubleshooting ChecklistSeries 2E253, 2H252, 2H253, User parameters Position of Mode switch IP address Reset Button Using the Reset ButtonSpeciﬁcations Device SpecificationsPhysical Properties Environmental Requirements Electrical SpecificationsINPUT/OUTPUT Ports Regulatory Compliance COM Port Pinout AssignmentsPage Required Tools Optional Installations Mode Switch Bank SettingsRemoving the Chassis Cover Removing the Chassis Cover Figure B-1 Removing the Chassis Cover Switch 6 Forced BootP Setting the Mode SwitchesSimm Upgrade Locating SIMMs Installing the Dram SimmFigure B-4 Installing the Dram Figure B-5 Hsim and Vhsim Connector Locations Installing Optional Hsim or Vhsim Interface ModulesPage Numerics IndexIndex-2