Enterasys Networks 4G4285-49, 4G4205-72 manual About PoE Power over Ethernet, Overview

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C

About PoE (Power over Ethernet)

This appendix provides an overview of Power over Ethernet Technology and how it is implemented in relation to the 4G4285‐49 and 4G4205‐72 DFE modules.

Overview

Power over Ethernet (PoE) refers to the ability to provide operational power through the same Ethernet cabling to a PD (powered device) connected to a data network. Modern Ethernet implementations employ differential signals over twisted pair cables. This requires a minimum of two twisted pairs for a single physical link. Both ends of the cable are isolated with transformers blocking any DC or common mode voltage on the signal pair. PoE exploits this fact by using two twisted pairs as the two conductors to supply a direct current. One pair carries the power supply current and the other pair provides a path for the return current. While several proprietary legacy implementations of PoE have been deployed by LAN equipment vendors, in 2003 the IEEE published the IEEE 802.3af‐2003 specification, which is part of the 802.3 suite of standards.

The 4G4285‐49 and 4G4205‐72 are fully compliant with the IEEE 802.3af standard. They support the standard resistor based detection method, as well as AC disconnect capability. The 4G4285‐49 and 4G4205‐72 are also capable of supplying the maximum specified current to all ports simultaneously.

Each PD has a PDC (Powered Device Classification) that is transmitted to the DFE module for power management purposes. Table C‐1 lists the classifications and the associated power ranges.

Table C-1 Powered Device Classifications

Class

Usage

PD Maximum Power Range Usage

 

 

 

0

Default

0.44 to 12.95 Watts

 

 

 

1

Optional

0.44 to 3.84 Watts

 

 

 

2

Optional

3.84 to 6.49 Watts

 

 

 

3

Optional

6.49 to 12.95 Watts

 

 

 

4

Not Allowed

Reserved for Future Use

 

 

 

Enterasys Matrix DFE-Gold Series PoE Module Hardware Installation Guide C-1

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Contents Enterasys Matrix Page Page Regulatory Compliance Information Electromagnetic Compatibility EMC Supplement to Product Instructions Vcci Notice Safety Information Class 1 Laser Transceivers Enterasys NETWORKS, INC. Firmware License Agreement Viii Page Page Contents Appendix B Mode Switch Settings and Option Installations TroubleshootingAppendix a Specifications Index Appendix C About PoE Power over EthernetTables Contents of DFE Module CartonImportant Notice About This GuideWho Should Use This Guide For Refer to How to Use This GuideRelated Documents Following conventions are used in this guide Conventions Used in This GuideGetting Help For information about Refer to IntroductionOverview of DFE-Gold Series PoE Module Capabilities 4G4285-49 DFE Modules4G4285-49 DFE-Gold Module 4G4205-72 4G4205-72 DFE-Gold Module Management Switch Configuration Using WebViewNetwork Expansion Module NEM Option ConnectivityStandards Compatibility Switch Configuration Using CLI CommandsSecure Networks Policy Support Lanview Diagnostic LEDs Lanview Diagnostic LEDs Introduction Network Requirements FTM Bridge Function and Optional NEM Module Placement in a Matrix E7 ChassisLink Aggregation 1000BASE-T Network 10BASE-T Network100BASE-TX Network 1000BASE-T Network Network Requirements Installation Unpacking the DFE Module Installation Site RequirementContents of DFE Module Carton Quantity DFE Module Placement and Installation Rules Installing Optional Network Expansion ModulesExample 2 -1, B Example 1 -1, aExample 4 -1, D Installing the DFE Module into a ChassisExample 3 -1, C Preparation Installing Module into Matrix E7 or N7 ChassisPreparing to Install Module into Matrix E7 or N7 Chassis Installing the DFE Modules into a Matrix E7 or N7 Chassis Preparing to Install Module into Matrix E7 or N7 Chassis DFE Preparing to Install Module into Matrix E7 or N7 Chassis Card guides Connecting 48 Vdc Power for PoE Operation Connecting UTP Cables to DFE Modules Connecting to the NetworkMaking the UTP Connections Connecting a Twisted Pair Segment with RJ45 ConnectorConnecting to the Network RX+ TX+ TX1+ RX1 TX2+ TX3+ RX3 RX2 TX4+ RX4 Verifying PoE Port Status What Is Needed Connecting to COM Port for Local ManagementParameter Setting Connecting to an IBM PC or Compatible Device10 Connecting a VT Series Terminal Connecting to a VT Series TerminalConnecting to a Modem COM Port Adapter Wiring and Signal Diagram RJ45 Adapter Wiring and Signal AssignmentsRJ45 DB25 Modem Port Adapter Wiring and Signal DiagramCompleting the Installation of a New System Completing the Installation12 Matrix DFE Startup Screen Example N7 Chassis Logging in with an Administratively-Configured User Account About the Management Mgmt LED TroubleshootingUsing Lanview Lanview LEDs on 4G4285-49 Viewing Receive/Transmit Activity on 4G4285-49Lanview LEDs on 4G4205-72 Viewing Receive/Transmit Activity on 4G4205-72Color State Recommended Action Viewing the PoE Port StatusLanview LEDs CPU RX/TX Indications in Standard ModeRX/TX RX/TX LED Indications in PoE Port Status ModeLED Series Configuration Guide for proper Troubleshooting ChecklistProblem Possible Cause Recommended Action Troubleshooting ChecklistOverview of DFE Module Shutdown Procedure OFFLINE/RESET Switch Recommended Shutdown Procedure Using OFFLINE/RESET SwitchLast Resort Shutdown Procedure Using OFFLINE/RESET Switch Specifications Physical DFE Module SpecificationsTable A-1 4G4285-49 Specifications Processors/MemoryTable A-2 4G4205-72 Specifications Table A-4 Compliance Standards Regulatory Compliance Table A-3 COM Port Pin Assignments Signal Name Input/OutputCOM Port Pinout Assignments Regulatory ComplianceRequired Tools Mode Switch Settings and Option InstallationsSetting the Mode Switches Memory Locations and Replacement Procedures Dram Simm Dimm Removing the Safety Cover Gaining Access to Memory ModulesFigure B-3 Removing the Safety Cover Removing the Network Expansion Module NEM Dram Simm Replacement ProcedureFigure B-4 Removing the Network Expansion Module NEM Removing the Dram Simm Installing the Dram SimmRemoving the Dimm Dimm Replacement ProcedureFigure B-7 Removing the Existing Dimm Installing the DimmFigure B-8 Installing the Dimm Installing the Network Expansion Module NEMFigure B-9 Installing the Network Expansion Module Reinstalling the Safety Cover Figure B-10 Installing the Safety Cover Page Overview About PoE Power over EthernetProprietary PD Detection Table C-2 PoE Status LED Indications PoE Port Status PoE Port Status LEDsOverview About PoE Power over Ethernet Numerics IndexConnecting to 3-14Network expansion module

4G4205-72, 4G4285-49 specifications

Enterasys Networks is a distinguished name in the realm of networking solutions, offering a variety of high-performance switches and routers designed for enterprise environments. Among their impressive lineup, the 4G4285-49 and 4G4205-72 models stand out for their advanced capabilities and robust features that cater to the demanding needs of modern IT infrastructure.

The Enterasys 4G4285-49 is a high-density Layer 3 switch that provides exceptional performance and reliability. It is equipped to handle the increasing data traffic common in enterprise networks, facilitating enhanced throughput and reduced latency. This model features 48 Gigabit Ethernet ports, ideal for connecting a vast array of devices within a network, along with one or two 10 Gigabit SFP+ uplink ports, ensuring fast data transmission to other network segments.

On the other hand, the 4G4205-72 is specifically designed as a versatile access switch with 24 Gigabit Ethernet ports and an additional 4 SFP+ uplink ports. This configuration makes it perfect for connecting endpoints like computers, printers, and other network devices while also providing scalability for future expansion.

Both models leverage advanced technologies such as Virtual LAN (VLAN) support, which helps in segmenting network traffic for better performance and security. Quality of Service (QoS) features are integrated, allowing administrators to prioritize critical applications and ensure optimal performance during high traffic periods. Additionally, security protocols like Access Control Lists (ACLs) and port security measures safeguard the network against unauthorized access.

The Enterasys 4G4285-49 and 4G4205-72 also support advanced management capabilities. With intuitive web-based interfaces and support for SNMP (Simple Network Management Protocol), IT teams can efficiently monitor network performance and troubleshoot issues as they arise.

In terms of build quality, both models are designed for reliability, featuring robust chassis and components that withstand the rigors of a data center environment. Their energy-efficient designs also contribute to reduced operational costs, aligning with the growing demand for sustainable networking solutions.

In summary, Enterasys Networks' 4G4285-49 and 4G4205-72 models combine high performance, advanced networking technologies, and robust security features, making them ideal choices for enterprises looking to enhance their network infrastructure and manage increasing data demands effectively.
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