Enterasys Networks 2H252-25R manual Full Duplex Switched Ethernet, SmartTrunk

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Overview

The RAD requests start at an interval of 1 per second. The interval then doubles after every transmission until an interval of 300 seconds is reached. At this point, the interval remains at 300 seconds. The RAD requests continue until an IP address is received from a RARP or BootP server, or an IP address is entered using Local Management.

NOTE: The 2H252-25R will reboot after RAD is successful.

1.1.3Full Duplex Switched Ethernet

Each switched Fast Ethernet port on the 2H252-25R supports 100 Mbps operation, and can operate in Full Duplex Switched Ethernet (FDSE) mode. FDSE enables each port to provide up to

200 Mbps of bandwidth to connected devices that support FDSE.

1.1.4SmartTrunk

Traditional 802.1D Spanning Tree Bridges only allow one active data path between any two switches; all other parallel data paths are in Standby or Blocking mode. If one interface or path should fail, then the other interface automatically comes out of Blocking mode and forwards all of the traffic. This is fine for redundancy purposes. However, it is not the most efficient use of resources.

SmartTrunk, also referred to as SmartTrunking, is Enterasys Networks’ terminology for load balancing or load sharing. SmartTrunk provides the ability to take full advantage of the network’s redundant bandwidth. SmartTrunk divides network traffic across multiple ports in parallel to provide additional throughput. The SmartTrunk application can be used with any of Enterasys Networks’ switch modules (except ATM modules).

For more information about SmartTrunk and how to configure it the SmartSwitch device, refer to the Enterasys Networks SmartTrunk User’s Guide.

Introduction 1-3

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Contents 2H252-25R SmartSwitch Installation User’s Guide Page Page Class a ITE Notice FCC NoticeIndustry Canada Notice Vcci NoticeEnterasys NETWORKS, INC Program License Agreement Page Declaration of Conformity Page Contents Troubleshooting Figures Tables About This Guide Using this GuideStructure of this Guide Related Documents Guide uses the following conventions Document ConventionsPage Overview IntroductionRuntime IP Address Discovery ConnectivitySmartTrunk Full Duplex Switched EthernetRate Limiting Remote Monitoring RmonBroadcast Suppression Port/VLAN Redirect FunctionsFlow Control Garp Switch OperationOptional HSIMs and VHSIMs Switching Options11 802.1 Port Priority ManagementStandards Compatibility Lanview Diagnostic LEDsYear 2000 Compliant Your email address Getting Help10BASE-T Network Network Requirements100BASE-TX Network Unpacking the Device InstallationInstalling Options Installation Installing the DeviceTabletop or Shelf Installation Guidelines for Tabletop and Shelf InstallationsGuidelines for the Rackmount Installation Rackmount InstallationAttaching the Strain-Relief Bracket Strain-Relief Bracket Screws Rack Mounting the 2H252-25RRackmount Bracket Screws Redundant Primary AC outlets are On separate circuits Connecting PowerConnecting Twisted Pair Cables to Fixed Ports Connecting to the NetworkConnecting the Twisted Pair Segment Straight-Through Cable Completing the Installation Using Lanview TroubleshootingLanview LEDs PWR CPU FDX Local Management User’s Guide Troubleshooting Checklist2E253, 2H252, 2H253 SmartSwitch Series 2E253 Reset Button Using the Reset ButtonPage Device Specifications 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 Optional Installations and Mode Switch Bank Settings B-3 Screws Chassis Cover Front Panel Figure B-2 Mode Switch Location Setting the Mode Switches6Optional Installations and Mode Switch Bank Settings Locating SIMMs Simm UpgradeInstalling the Dram Simm Figure B-5 Hsim and Vhsim Connector Locations Installing Optional Hsim or Vhsim Interface ModulesPage Numerics IndexIndex-2