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PoE and PoE+ Capabilities on the EX2200 Ethernet Switch

by Juniper Employee on ‎06-01-2010 10:28 AM

Today’s enterprise network is likely a converged environment, in which not just data but voice, video and other types of traffic flow over the same IP network.  In these networks, the ability to support Power over Ethernet (PoE), which provides power for IP-enabled devices via the network, is a critical requirement.


The EX2200 line of Ethernet switches not only supports PoE, it is also capable of supporting the recently ratified PoE+ standard, which delivers higher levels of power for more demanding devices.


The original PoE standard (without the “+”), defined as IEEE 802.3af and ratified in 2003, specifies the delivery of a regulated 15.4 watts at the output from a Power Sourcing Equipment (PSE) device over a standard copper Ethernet network cable.  The power is utilized by connected powered devices (PDs) such as VoIP phones, wireless access points (AP) and IP-based video cameras.  The ability to deliver power over the same Ethernet LAN cables used to transmit data has eliminated the need to attach PDs to electrical outlets.  This not only simplifies device deployment, it also lowers the cost of deployment, provides greater flexibility, and enables remote management.


The PoE+ standard, recently ratified as IEEE 802.3at, was driven by the wide popularity of PoE and the emergence of next-generation devices such as IEEE 802.11n access points, pan-and-zoom IP video cameras, video conferencing equipment and thin clients that require more power than the 15.4 watts provided by PoE.  To accommodate these PDs with higher power requirements, the PoE+ specification provides up to 30 watts of power as defined in the 802.3at standard.


Naturally, the new standard will raise questions about backward compatibility and whether IEEE 802.3af will interoperate with IEEE 802.3at.  In the case of an IEEE 802.3af (PoE) PD connected to an IEEE 802.3at (PoE+) PSE, the device will operate normally but won’t be able to take advantage of the PoE+ standard’s advanced power management.  Conversely, when an 802.3at (PoE+) PD is connected to an 802.3af (PoE) PSE, the device will work provided it can operate within the lower power mode, possibly with reduced performance.


The EX2200 Ethernet switch supports both IEEE 802.3af devices as well as 802.3at PDs that are becoming more prominent in today’s enterprise network, delivering a complete solution that accommodates the vast majority of branch and low-density wiring closet deployments.


by Telnet-1 on ‎02-17-2013 07:16 AM

on EX2200-P , is POE+ supported on all ports ?   its power supply is 405 Watt only ?


by Vaško Lubo on ‎04-16-2013 01:10 PM

PoE EX2200 me to work. Powered up the connected device that has a consumption of 11.5W voltage 8-30V. Several times I have it set to factory settings. Set the web interface. I measured the voltage on the brown wires Ethernet interface and nothing. Help me.

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  • Title: Senior Vice President and General Manager of the Branch Solutions Business Unit Area of Responsibility: Driving Juniper business including strategy, revenue/profitability, products and execution for this segment of SLT's overall portfolio, specifically comprehensive solutions for the small to medium size locations of large, distributed enterprises. Alex joined Juniper in February 2008 after more than five years at Extreme Networks, where he served as Chief Operating Officer from mid 2002 through 2006, and the last year as VP and GM of Extreme's high-end switching business and core engineering operations. During his tenure at Extreme Alex led programs which established essential product lifecycle and quality systems, completely refreshed the product portfolio, significantly improved product and service quality and margins, and streamlined the supply chain. Prior to Extreme Alex served as Chief Operating Officer for LCG Wireless (acquired by ADC Telecommunications), SVP Business Operations for ReplayTV, and earlier spent eight years in various executive roles with Octel Communications (acquired by Lucent Technologies) as CIO, SVP Business Operations, and SVP and GM of Enterprise Messaging. Alex holds a bachelors and masters degree in electrical engineering from Washington University in St. Louis.
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