Achieving Energy Efficiency For PoE (Power over Ethernet) Networks 1
PoE Introduction POE or Power Over Ethernet is a technology incubated by which the transfer of electrical power as well as data over data cables in Ethernet network is done. POE The PoE standard is IEEE 802.3af-2003 Provides up to 15.4W of DC Power to Powered Devices The Updated version of PoE is PoE+ or PoE Plus POE Plus The Standard is IEEE 802.3at- 2009 Provides up to 25.5W of DC Power to Powered Devices 2
PSE & PD Power (Sourcing Equipment PSE) Powered Devices (PD) PSE is a PoE enabled device that gives Source Power to devices on the network via Ethernet Cable PSE includes Router, Switches etc Powered Devices get the power from PSE and work on it. PD includes devices like Surveillance Camera, Wireless Access Points, IP Cameras etc Types of PSE EndSpan: Directly connects with PDs MidSpan: Fits in between PoE/Non- PoE switch & PD 3
POE Switch = PSE End-Span 4
POEM Power over Ethernet Management Architecture NMS API/CLI POET Power consumption Data Energy Aware Policy Management Reports Sample Powered Devices (PD): Notebook PDA IP Telephone Ethernet/RS-232 converter WiFi AP POET: Power Over Ethernet Tracker NMS: Network Management System CLI: Command Line Interface 5
Integrated Energy Mgmt Solution POEM Power over Ethernet management isead Energy management dashboard and control UI Over WiFi / Ethernet AEGIS Energy Management Gateway Sample Powered Devices Over Zigbee / PLC Smart Meter 6 Thermostat Load Controller
POEM in Enterprise Energy management IT Energy Management Energy Mgmt for PoE Devices Power Saving Policies Power Mgmt for Virtual Infrastructure Power Savings for Desktop / Laptop Integrated Energy Management Integrated Energy Mgmt Platform Converged Energy Aware Policy Management Integrated Energy Usage Monitoring Energy Efficiency Benchmarking Energy Demand Mgmt Building / Facility Energy Management Energy Management Gateways for buildings / Facilities Sensor driven Management Emission Management 7
Methods And Techniques For Advanced PoE Management Dynamic or Need Based Control Of Ports Peak Demand Control Auto Configuration Of Ports ADVANCED POE MANAGEMENT Smart Scheduling Based On The Usage Trends Analysis Of Devices And Ports Energy Efficiency Power Management Through Presence Data 8
Peak Demand Control Priority setting of ports (as Low/High) Low priority ports are powered off when the peak power usage exceeds some predefined limit Scheduled power-on/off of the ports help reduce energy usage PoE Management software has the capability to enable and disable the PoE ports on a network switch. PoE configuration is provided with the help of CLI, SNMP, XML / Web interfaces etc. Power Management And Savings 9
Dynamic Or Need Based Control Of Ports Longevity of Devices is extended SNMP & MIB is used in NMS to monitor the devices in the network which also facilitates the controlling of ports. Automatic shutdown of ports when loop/cable fault is detected Event-Based and Time- Based control of ports is possible with PoE. Example, when PoE powered devices are not in use those ports can be disabled until needed. Need based control is vital. For eg. if the floor does not have any users, there is no need to have the IP-Phone Powered ON To save energy and enhance security, the PoE Management facilitates the administrators to configure when to power on/off the network ports. 10
Auto Configuration Of Ports Ease of Use Device Classification helps Power budget feature and facilitate Intelligent Power Management PD Detection is the primary activity followed by PD Classification Helps to monitor and diagnose any configuration changes in the PD Auto-configure the port based on the device connected to PoE devices(if a class 0/3 device is connected, set the priority as low). Port prioritization is one of the key features and it helps in the autoconfiguration process. 11
Smart Scheduling Based On The Usage Trends Usage Trends helps to manage smart scheduling based on abnormal conditions, such as power cut, over feeding or under supplying etc. It also helps to prevent error or any fatal situations in advance based on the possible observation. Polling the amount of realtime power delivery on each and every port of PSE helps to know and monitor the current status and also get an idea of the PoE Port trend. An hourly/weekly scheduling mechanism is used to function the advanced power control. Each PoE port can be switched ON/OFF on hourly basis too. PoE Power Scheduling & PoEM Smart Scheduling helps to implement power saving policy in a better way Prediction is Possible 12
Analysis Of Devices And Ports Energy Efficiency Data Information Knowledge Action Visibility of energy consumption in multiple dimensions (PD type, class, PSE, port, time) Ability to identify shift in the typical energy consumption of a PD at the PSE Improved energy efficiency and hence direct savings to Enterprises and Data centers Some KPIs & Metrics for Energy Efficiency: Watts per Active Port : Total power consumed by PSE divided by total number of active ports PSE Power Consumption across timelines & PDs Connected and its power consumption for a PSE 13
Power Sourcing Equipment Power Consumption Level 1: Shows power consumption of all equipments 14
Power Sourcing Equipment Power Consumption Level 1: Shows power consumption of all equipments Level 2: Shows power consumption of the selected equipment over the years 15
Power Sourcing Equipment Power Consumption Level 1: Shows power consumption of all equipments Level 2: Shows power consumption of the selected equipment over the years Level 3: Shows power consumption for the selected year 16
Power Sourcing Equipment Power Consumption Level 1: Shows power consumption of all equipments Level 2: Shows power consumption of the selected equipment over the years Level 3: Shows power consumption for the selected year Level 4: Shows power consumption for the selected month Helps to identify condition of the equipment by closely monitoring its historical data 17
Devices Connected and Power Consumption Level 1: Shows number of PD devices connected to the equipments 18
Devices Connected and Power Consumption Level 1: Shows number of PD devices connected to the equipments Level 2: Shows power consumption of each PD device connected to the equipment Helps to monitor the power consumption of each PD device 19
Power Management Through Available Presence Server Usage Data Recognize & Respond Presence Server plays a vital role in network environments Information on IT devices(status) as well as people (presence) can be captured and the tracking is possible People presence is identified using IP Cameras, Door Controls etc. The data is processed in Presence Server and helps the administrator to do Power Management manually or automatically Threshold values received from presence server with respect to power facilitates better Power Management 20
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