1/31/2015
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`Cisco Universal Power Over Ethernet - Unleash the Power of your Network White Paper - Cisco
`
`Cisco Catalyst 4500 Series Switches
`
`Cisco Universal Power Over Ethernet - Unleash the Power of your Network White
`Paper
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`Cisco Universal Power Over
`Ethernet - Unleash the Power
`of your Network White Paper
`
`Viewing Options
`
`Introduction
`Enterprise workspace is quickly evolving
`with new networked devices to improve
`communication, collaboration, security,
`and productivity. Power over Ethernet
`(PoE), a way to deliver electrical power
`over LAN cabling to networked devices,
`has been widely deployed over the years to provide power to various endpoints in
`the enterprise workspace environment. Cisco® Catalyst®, are a market leader of
`PoE technology, continues to innovate to deliver Universal PoE (UPOE)
`technology with up to 60 watt power to enable even broader endpoint support, with
`additional benefits of higher availability, lower OpEx, and faster deployment.
`
`PDF (1.0 MB)
` Feedback
`
`This paper provides an overview of the Cisco UPOE technology. It describes how
`Cisco has evolved PoE technology to UPOE, the use case examples of UPOE to
`simplify enterprise deployment, and UPOE architecture and operations.
`
`Evolution of PoE Technology
`In recent years, enterprise workspace is increasingly converged to IP network
`infrastructure. PoE is one of the mostly widely deployed technologies to provide
`power to networked devices, with the following primary benefits:
`
`High availability for power and guarantees uninterrupted services, a
`●
`requirement for critical applications (e911).
`Lower OpEx by providing network resiliency at lower cost by consolidating
`●
`backup power into the wiring closet.
`Faster deployment of new campus access networking infrastructures by
`●
`eliminating the need for a power outlet for every endpoint.
`Combined with Cisco EnergyWise and Energy-Efficient Ethernet (EEE),
`●
`helps meet corporate sustainability mandates while lowering energy
`costs.
`
`As the enterprise workspace evolves with more and more end devices for
`communication, collaboration, security, and productivity, the need of PoE is also
`evolving to support newer end devices with increased power requirements.
`Flowing Figure 1 shows the PoE evolution.
`
`Figure 1. Evolution of PoE Standard and Cisco Delivery with Cisco Catalyst Switches
`
`Cisco has been leading Power over Ethernet technology since 2000; the first
`generation of Cisco prestandard PoE delivered up to 6.3W to the end devices over
`the Ethernet cables that transport data traffic. This prestandard PoE supported
`endpoints such as Cisco IP phone 7906G/7911G/7941G and so on.
`
`In June 2003, the IEEE approved a standard, IEEE 802.3af, for Power over
`Ethernet technology. The standard specified a 15.4W maximum power delivery
`from the network device, also known as power sourcing equipment (PSE), to an
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`end device, also known as a powered device (PD). The average maximum power
`available to the PD is 12.95W after accounting for cable loss. This expands
`broader end device coverage such as Cisco IP phone 7941G-GE/7961G-
`GE/7985G and wireless access points.
`
`To support more emerging end devices with higher power requirements, IEEE
`introduced new standard, 802.3at, to scale up to 30W power delivery. This further
`expands the end devices coverage to a broader range including newer devices
`such as IEEE 802.11n wireless access points, security surveillance cameras, and
`so on. Cisco Catalyst 4500E was the first Ethernet switch in the industry to
`introduce 30W PoE technology in 2007, two years before the IEEE 802.3at
`standard introduction, and later become compliant with the IEEE 802.3at standard
`when it was ratified in 2009.
`
`As more networked devices emerge in enterprise workspace and become more
`efficient in terms of power consumption, there are more opportunities to take
`advantage of the benefits of PoE technology to simplify the provisioning and
`deployment of these devices and save costs. PoE technology has the potential to
`deliver up to 60W per device, which allows a much wider range of device support.
`Cisco UPOE leapfrogs the industry to provide 60W PoE per switch port to enable
`new deployment options in next-generation workspace environments.
`
`Use Case Examples of UPOE
`Cisco UPOE simplifies network infrastructures and delivers lower total cost of
`ownership for connected environments such as virtual desktop infrastructure (VDI),
`financial trading floor, enterprise workspace, conference rooms, hospitality guest
`suites, and retail. Partnerships with industry leaders and in-house development
`together have resulted in a variety of end devices that are compatible with Cisco
`UPOE. A few notable end devices are:
`
`Samsung integrated display VDI zero clients
`●
`BT IP turrets
`●
`Cisco Catalyst compact switches
`●
`Cisco Personal TelePresence® systems
`●
`Building management and physical security devices
`●
`
`The following sessions describes several UPOE use case examples.
`
`Virtual Desktop Infrastructure
`
`Virtual desktop infrastructure (VDI) is becoming more popular in enterprise to
`address increasing challenges of security, changing global business dynamics,
`TCO requirements, and increasingly mobile and diverse workforce. VDI
`fundamentally changes the way that employees, partners and consultants work by
`providing anytime, anywhere secure access to desktops hosted and managed in
`the data center. It provides these benefits:
`
`Compliance, data security, and control
`●
`Rapid desktop deployment and scaling
`●
`Total cost ownership with benefits such as centralized and streamlined
`●
`desktop lifecycle management
`
`In a VDI deployment, an end-user device can be a thin client that provides an
`optimized, lower cost device designed specifically to interact with a hosted virtual
`desktop. UPOE can greatly simplify this deployment by providing PoE power to the
`thin client and its display. The following deployment options require by UPOE:
`
`Integrated Display: To simplify the workspace, vendors start to integrate thin
`●
`client, softphone functionalities into the display monitor to provide one
`integrated endpoint to the end users. With the advancement of
`technologies, the power consumption of this VDI thin client display can fall
`into the range of 50W. For example, the Samsung 220 display monitor
`offers integrated thin client function with less than 51W power consumption.
`With UPOE, the VDI system can be powered by UPOE power to provide a
`very flexible plug-and-play deployment, see Figure 2 below.
`Figure 2. VDI with Integrated Display
`
`Backpack VDI module with IP Phone: Cisco VXC 2100 is a compact device
`●
`that is physically integrated with the Cisco Unified IP Phone 8900 or 9900
`Series, to provide end-point for users.
`Standalone VDI device: Cisco VXC 2200 is a sleek, standalone, small-
`●
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`footprint zero client device. With UPOE, users can power both the VXC
`2200 as well as native LED displays.
`
`UPOE provides the following benefits in the VDI deployment:
`
`Deployment flexibility: By providing data as well as power to the
`workspace, network administrators now have flexibility to respond to
`changing business needs to provide access to employee, guests, or
`contractors.
`
`Lower cost of ownership: UPOE helps business to lower the cost of
`ownership through:
`
`Converging the power to central location and removing the need of wall plug
`●
`Highly efficient switch power supply in comparison of power adapters in
`●
`every user office
`Optimizing stay-on time through network rather than relying on individual
`●
`users
`Reduced cable clutter
`●
`
`Financial Trading Floors
`
`In today’s IP trading floor design, network planners need to respond to traders’
`requests for multiple screens, live video feed, conference calls, and lightning
`speed to get feed updates. All these request high availability, multicast and
`buffering architecture as the key features for the network. Cisco Catalyst 4500E is
`switch of choice with right features set to address primary trends that are shaping
`today’s IP trading floor design. This platform not only provides line-rate unicast and
`multicast switching with consistent low latency to all user access ports but also
`delivers rich borderless network services critical for financial deployments. Some
`of these services include high availability with full hardware redundancy and
`software features like In-Service Software Upgrade; application visibility with
`Flexible Netflow (FnF) and hosted applications like WireShark.
`
`One of the primary devices in the IP trading environment is the IP turret system that
`provides integrated communication tools for financial traders. Today, IP turrets are
`powered by wall power with backup UPS power sources under each trader’s desk
`for high availability. With UPOE technology, the IP data and power can be
`converted to a single highly resilient networking infrastructure with Cisco Catalyst
`4500E, see Figure 3. This greatly reduces the total cost of ownership by simplifying
`the cabling and consolidating backup power into the closet.
`
`Figure 3. Financial Trading Floors Enabled by Cisco Catalyst 4500E
`
`Cisco is partnering with the following market-leading IP turret vendors to deliver
`this solution:
`
`British Telecom
`●
`IP Trade
`●
`Speakerbus
`●
`
`Hospitality and Retail Environment
`
`Customer experience plays a primary role in hospitality and retail sector that relies
`heavily on repeat customers. Retail industry is leveraging the advancements in
`technologies to create a positive experience on their customers, thus improving
`their profitability. In addition, rising energy costs are giving more attention than
`ever to sustainable business practices, and innovation on Cisco Catalyst platforms
`like 4500E, 3850, 3750-X and 3560-X addressing these initiatives.
`
`UPOE enables powering multiple endpoints by using POE pass-through on
`Cisco’s latest compact switches, 3560C or 2960C, see Figure 4. This enables
`advanced security services to reach the network edge and deliver Power over
`Ethernet and Gigabit Ethernet connectivity for deployments outside the wiring
`closet. This solution reduces wiring constraints and enables network
`consolidation.
`
`Figure 4. UPOE in Retail Deployments
`
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`
`Primary benefits include:
`
`Energy management: With centralized management, hotels can now
`manage turning on and off room devices in much more streamlined
`fashion. This not only lets customers get a ready room by the time they
`check in, but also the hotel saves energy cost by turning off selected
`devices when the customer walks out of the room.
`
`Operational easiness: UPOE powered compact switches enable hotels to
`plan for upcoming conferences or seminars on a need basis.
`
`UPOE Architecture
`As defined in IEEE 802.3af and IEEE 802.3at, PoE delivers electrical power over
`two pairs out of the four twisted pairs of cable in Class D (also known as Cat5e) or
`better, cabling as specified in ISO/IEC 11801:1995. A PSE uses only signal pairs,
`the pairs 1, 2 and 3, 6, to transport power from the PSE to the PD and leaves the
`spare pairs, the pairs 4, 5 and 7, 8, idle. This architecture can deliver up to 30W
`per port. (Refer to Figure 5.)
`
`Figure 5. PoE and PoE+ Architecture
`
`UPOE uses the same cabling standard as PoE. Instead of delivering power over
`two twisted pairs, it provides the capability to source up to 60W of power by using
`all the four pairs of standard Ethernet cabling (Cat5e or better).
`
`The architecture for a 4-pair system is pretty straightforward; it is an extension of
`the 2-pair design. The 2-pair system uses one PSE controller to power the PD
`through the signal pairs of the cable. In the new 4-pair system two PSE controllers
`will be used to power both the signal pairs and the spare pairs. Figure 6 shows the
`UPOE architecture.
`
`Figure 6. UPoE Architecture
`
`Table 1 summarizes the primary comparison between PoE, PoE Plus, and UPOE.
`
`Table 1. PoE/PoE Plus/UPOE comparison
`
`PoE
`
`PoE
`Plus
`
`UPOE
`
`Minimum cable type
`
`Cat5e
`
`Cat5e
`
`Cat5e
`
`IEEE standard definition
`
`802.3af
`
`802.3at
`
`Cisco
`proprietary
`
`Maximum power per
`PSE port
`
`15.4W
`
`30W
`
`60W
`
`Maximum power to PD
`
`12.95W
`
`25.5W
`
`51W
`
`Twisted pair used
`
`2-pair
`
`2-pair
`
`4-pair
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`UPOE cable heat dissipation
`Cisco UPOE is an efficient mechanism for power delivery since it uses all four
`twisted pairs within the Ethernet cable to deliver power (as opposed to two twisted
`pairs used by PoE Plus). This effectively reduces the channel losses by half for the
`same power delivered over UPOE vs. PoE Plus. Moreover, the recommendation
`published by cabling standards - ISO/IEC and TIA/TR-42 as part of formal liaison
`committee with IEEE 802.3 - indicate that UPOE can be supported over the same
`standard cabling infrastructures that conform to PoE Plus requirements. Results as
`following in Table 2.
`
`Table 2. Test Results from TIA TR-42 and ISO/IEC
`
`TIA TR-42 Recommendation
`
`ISO/IEC Recommendation
`
`Max
`Power
`
`@5
`
`0V
`
`Temperature
`Rise
`
`Max
`Current
`per
`twisted
`Pair
`
`Max
`Power
`
`@5
`
`0V
`
`Temperature
`Rise
`
`Max
`Current
`per
`twisted
`Pair
`
`5
`
`7.5
`
`10
`
`12.5
`
`15
`
`420mA
`
`37.5W
`
`520mA
`
`45.2W
`
`600mA
`
`51.0W
`
`670mA
`
`55.8W
`
`720mA
`
`59.0W
`
`5
`
`7.5
`
`10
`
`12.5
`
`15
`
`420mA
`
`37.5W
`
`550mA
`
`47.4W
`
`600mA
`
`51.0W
`
`680mA
`
`56.4W
`
`720mA
`
`59.0W
`
`With maximum 51W UPOE capacity, temperature for 100-cable bundle increased
`10 degrees. This is as required by PoE Plus cable standard request defined in
`802.3at.
`
`UPOE Operation
`This section describes the UPOE operation steps to detect, classify, and negotiate
`power and subsequently power up the PD.
`
`PD Detection, Classification
`
`The hardware detection and classification mechanism for UPOE follows the IEEE
`802.3 standard. The PSE and the PD use a set of physical layer mechanisms to
`detect the connection of the endpoint and subsequently classify the endpoints into
`different categories that map to different levels of power requirements. Table 3 lists
`the PoE classes.
`
`Table 3. PoE Classes
`
`Class
`
`Usage
`of class
`
`Class
`description
`
`Minimum
`Power
`Levels
`Output at
`the PSE
`
`Maximum
`Power
`Levels at
`the
`Powered
`Device
`
`0.44 to
`12.95W
`
`0.44 to
`3.84W
`
`3.84 to
`6.49W
`
`6.49 to
`12.95W
`
`Classification
`unimplemented
`
`Very Low
`Power
`
`Low Power
`
`Mid Power
`
`12.95W to
`25.5W
`
`High Power
`
`Default
`
`15.4W
`
`Optional
`
`4.0W
`
`Optional
`
`7.0W
`
`Optional
`
`15.4W
`
`Reserved
`in
`802.3af
`802.3at
`
`Treat as
`Class 0
`30W
`
`0
`
`1
`
`2
`
`3
`
`44
`
`At power-on, a UPOE device is treated as a PoE device and allocated 15.4W as
`the default power. After power-on the PSE and PD go through a power negotiation
`phase to determine exactly how much power will be provisioned from the PSE to
`the PD.
`
`UPOE Power Negotiation
`
`UPOE uses the same CDP and LLDP power negotiation mechanism and
`algorithms for inline power negotiation with an extended range of allowing
`requests up to 60W contingent on PSE hardware capability and power budget.
`With UPOE, we introduce a new CDP and LLDP TLV to accommodate the 4-pair
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`PoE functionality. It is mandatory for any PD requiring 4-pair PoE functionality to
`implement at least these CDP/LLDP TLVs and have them enabled administratively
`or by default.
`
`UPOE LLDP TLV
`●
`
`A new LLDP TLV, “4-wire Power-via-MDI” TLV, is introduced for UPOE.
`This TLV is present in the LLDP packet in all modes of operation, that is,
`802.3af, 802.3at, and beyond. The PD can use this TLV to advertise its 4-
`pair related capabilities and requirements to the PSE; the PSE can power
`the PD accordingly.
`
`Table 4 shows the LLDP frame format.
`
`Table 4. LLDP Frame Format
`
`TLV
`Information
`String
`Length
`
`Cisco
`OUI
`Identifier
`
`Cisco
`OUI
`Subtype
`
`PSE/PD
`Capabilities
`
`9 bits
`
`3 octets
`
`1 octet
`
`1 octet
`
`TLV
`Type
`
`7b
`
`its
`
`The values of the fields in the TLV are as follows:
`
`TLV Type = 127 (Org Specific TLV)
`
`TLV String Length = 5 (5 bytes)
`
`Cisco OUI Identifier = 00-01-42 (0x000142)
`
`Cisco OUI Subtype = 1
`
`This TLV is required to be implemented by PDs and PSEs that need 4-pair PoE
`negotiation.
`
`UPOE CDP TLV
`●
`
`A new CDP TLV, “Spare Pair PoE” TLV, is also introduced for the same
`purposes. It is one octet long and has the same structure as the PSE/PD
`capabilities field of the LLDP TLV, see Table 5.
`
`Table 5. PSE/PD Capabilities field
`
`Bit
`
`Function
`
`Value/Meaning
`
`0
`
`1
`
`2
`
`3
`
`4-pair PoE Supported
`
`Spare pair Detection/Classification
`required
`
`PD Spare Pair Desired State
`
`PSE Spare Pair Operational State
`
`0=No
`1=Yes
`
`0=No
`1=Yes
`
`0=Disabled
`1=Enabled
`
`0=Disabled
`1=Enabled
`
`Reserved
`
`B4
`
`:7
`
`Figure 7. UPoE Operation
`
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`
`With this new CDP and LLDP TLV, the PSE and PD follow these steps, as
`illustrated in Figure 7, to negotiate UPOE power requirement:
`
`1. The PD is first powered up as per IEEE 802.3af/at specifications on the
`signal pair only.
`
`2. The PD and PSE keep advertising their respective 4-pair PoE capabilities
`through the UPOE CDP or LLDP TLV defined previously. When a PD receives
`this TLV from the PSE, it knows that this is a 4-pair PoE capable PSE and
`hence it can request a power level beyond 30 Watt. When the PSE receives
`this TLV from PD, it knows that this is a 4-pair PoE capable PD and it can
`enable power on spare pair.
`
`3. The PD may request the spare pair to be enabled at any point of time after
`the PD is powered on the signal pair and the 4-pair TLVs are exchanged. The
`PD signals this to the PSE through the UPOE LLDP or CDP TLV by setting
`the “PD Spare Pair Desired State” bit. On receiving this request, PSE sends a
`request to the PoE port firmware to enable power on the spare pair. It takes a
`finite time duration for the power to be enabled on the spare pair, as the port
`goes through a sequence of events.
`
`4. When the PSE has successfully enabled power on the spare pair, it sends
`the UPOE TLV to the PD with the “PSE Spare Pair Operational State” bit set
`to indicate that it has successfully powered on the spare pair.
`
`5. If the PD likes to request more than 30W power, it may do so only after
`receiving a TLV from the PSE indicating that the PSE Spare Pair Operational
`state is Enabled. Once the request is received by the PSE, if the PSE has
`enough power budget, it allocates the requested power to the port and
`advertises this back to the PD. The PD is fully powered on only when it
`receives this response.
`
`If the PSE does not have sufficient power budget or its configuration restricts the
`maximum power to the port that is less than the PD’s requested power, the
`switch simply responds back with the currently allocated power to the PD. Thus,
`the PD should only power hardware based on the “Allocated Power” field that
`has been previously advertised by the PSE.
`
`UPOE Splitter
`To provide flexible deployment, the UPOE splitter is designed to support end
`devices that don’t support PoE natively but can benefit from being powered over
`PoE.
`
`The UPOE splitter receives both data and UPOE power from the PSE over the
`standard Ethernet cable. On the other end of the splitter, it splits into a standard
`Ethernet cable that is capable to transport both data and PoE/PoEP power and a
`DC connector that is used to transport only power. Depending on the end device
`situation, the splitter can operate in the following two modes:
`
`PoE pass-through mode. In this mode, the Ethernet cable of the splitter
`●
`passes through both data and PoE power, and the DC connector passes
`through power only. Between the Ethernet cable and the DC connector,
`they share the UPOE power up to 51W. For example, in a VDI deployment
`as shown in Figure 8, the UPOE splitter is used to connect to a dedicated
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`PoE/PoEP-capable thin client to provide both data and power over its
`Ethernet cable and to the display monitor to provide power only over its DC
`connector.
`Non PoE pass-through mode. In this mode, the Ethernet cable of the UPOE
`●
`splitter only transports data, while its DC connector provides power up to
`12V. This mode supports end devices that have separate Ethernet port and
`power input, or it can simply provide Ethernet connectivity to one end
`device, while providing power to another end device in the work space. For
`example, in the IP turret example as shown in Figure 9, the Ethernet cable
`of the splitter is connected to the Ethernet port of the IP turret to provide
`network connectivity, while the DC connector powers up the IP turret.
`Figure 8. PoE Pass-Through
`
`Figure 9. No PoE Pass-Through
`
`Since the splitter doesn’t support the negotiation mechanism to negotiate power
`with PSE, we need to configure the “forced mode” on the PSE port that connects to
`the splitter.
`
`The UPOE Splitter is designed to protect any damage being made to the powered
`device that is not compatible with UPOE in the "forced mode".
`
`Cisco Catalyst 4500E UPOE Line Card
`Cisco UPOE was first introduced on Cisco Catalyst 4500E Series switching
`platform, the most widely deployed modular access switching platform in the
`industry. The platform has time and again demonstrated leadership in this PoE
`technology innovation.
`
`A new line card, WS-X4748-UPOE+E, has been introduced to support UPOE. The
`primary features for this line card include:
`
`UPOE: capable of up to 60W per port simultaneously on 24 ports
`●
`Capable of up to 30W of inline power per port on all ports simultaneously
`●
`Energy Efficient Ethernet 802.3az
`●
`Backward IEEE 802.3af/at and Cisco pre-standard PoE
`●
`LLDP-based dynamic power negotiation capability
`●
`Nonblocking 48 10/100/1000 Mbps ports
`●
`IEEE 802.1ae and Cisco TrustSec® capability in hardware
`●
`L2-4 Jumbo Frame support (up to 9216 bytes)
`●
`
`Cisco Catalyst 3850, 3750-X and 3560-X UPOE Switches
`Cisco Catalyst 3850, 3750-X and 3560-X UPOE switches are fixed 1rack unit (RU)
`form factor switches, which extend the IEEE 802.3at PoE+ standard to deliver up to
`60W per port over standard cabling infrastructure. Cisco Catalyst 3850 and 3750-X
`UPOE switches are stackable series of switches, whereas Cisco Catalyst 3560-X
`UPOE switches are standalone series of switches. The fixed UPOE switch models
`are available with either the LAN Base, IP Base or IP Services feature set.
`
`Table 6. Stackable 1RU UPOE Switch Models
`
`Models
`
`Feature
`Set
`
`Total 10/100/1000 Ethernet
`Ports
`
`WS-C3750X-
`24U-L
`
`WS-C3750X-
`48U-L
`
`LAN Base
`
`24 UPOE
`
`LAN Base
`
`48 UPOE
`
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`
`WS-C3750X-
`24U-S
`
`WS-C3750X-
`48U-S
`
`WS-C3750X-
`24U-E
`
`WS-C3750X-
`48U-E
`
`WS-C3850-
`24U-L
`
`WS-C3850-
`48U-L
`
`WS-C3850-
`24U-S
`
`WS-C3850-
`48U-S
`
`WS-C3850-
`24U-E
`
`WS-C3850-
`48U-E
`
`IP Base
`
`24 UPOE
`
`IP Base
`
`48 UPOE
`
`IP
`Services
`
`IP
`Services
`
`24 UPOE
`
`48 UPOE
`
`LAN Base
`
`24 UPOE
`
`LAN Base
`
`48 UPOE
`
`IP Base
`
`24 UPOE
`
`IP Base
`
`48 UPOE
`
`IP
`Services
`
`IP
`Services
`
`24 UPOE
`
`48 UPOE
`
`Table 7. Standalone 1RU UPOE Switch Models
`
`Models
`
`Feature
`Set
`
`Total 10/100/1000 Ethernet
`Ports
`
`WS-C3560X-
`24U-L
`
`WS-C3560X-
`48U-L
`
`WS-C3560X-
`24U-S
`
`WS-C3560X-
`48U-S
`
`WS-C3560X-
`24U-E
`
`WS-C3560X-
`48U-E
`
`LAN Base
`
`24 UPOE
`
`LAN Base
`
`48 UPOE
`
`IP Base
`
`24 UPOE
`
`IP Base
`
`48 UPOE
`
`IP
`Services
`
`IP
`Services
`
`24 UPOE
`
`48 UPOE
`
`The primary features for these fixed 1rack unit (RU) form factor UPOE switches
`include:
`
`UPOE: capable of up to 60W per port simultaneously on 30 ports with
`●
`secondary power supply
`Dual redundant, modular power supplies and fans
`●
`Energy Efficient Ethernet 802.3az
`●
`Backward compatible IEEE 802.3af/at and Cisco pre-standard PoE
`●
`LLDP-based dynamic power negotiation capability
`●
`Non-blocking 24 or 48 10/100/1000 Mbps ports
`●
`IEEE 802.1ae and Cisco TrustSec® capability in hardware
`●
`L2-4 Jumbo Frame support (up to 9216 bytes)
`●
`
`Power Supplies Consideration for UPOE Deployment
`For UPOE deployment with Cisco Catalyst 4500E, it is recommended to use one of
`the following two AC power supplies:
`
`PWR-C45-4200ACV
`●
`PWR-C45-6000ACV
`●
`
`Table 6 lists the maximum number of PDs that these two power supplies can
`support in a combined mode.
`
`Table 8. Maximum Number of PDs Supported for Cisco Catalyst 4500E
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`Standard
`802.3af Classes
`0 and 3 (15.4W
`per Port)
`
`4200WAC
`
`6000WAC
`
`374
`
`384
`
`Standard
`802.3at
`Class 4
`(30W per
`Port)
`
`192
`
`269
`
`Cisco
`UPOE
`(60W
`per
`Port)
`
`96
`
`134
`
`For more detailed information regarding these power supplies, check the power
`supply specifications at
`http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/hardware/catalyst4500e/installation/guide/0aspecs.html.
`
`The Cisco Catalyst 3850, 3750-X and 3560-X UPOE Series Switches support dual
`redundant power supplies. Theswitch ships with C3KX-PWR-1100WAC power
`supply by default. The available PoE power with default power supply is 800W for
`all models. The second power supply can be purchased at the time of ordering the
`switch or at a later time. The UPOE power increases with secondary power supply.
`The maximum UPOE budget available on the Cisco Catalyst 3850, 3750-X and
`3560-X UPOE switches is 1800W per switch. This requires C3KX-PWR-1100WAC
`power supply in both the power supply slots. 1800W in POE budget makes sure
`that the 24-port models support full UPOE on all ports (24 x 60W/port = 1440W)
`and the 48-port models support up to 30 UPOE connections (30 x 60W/port =
`1800W) per switch.
`
`Table 9. Maximum Number of PD Supported with Default Power Supply on Cisco
`Catalyst Fixed UPOE Switches
`
`Models
`
`WS-
`C3850-
`24U
`
`WS-
`C3850X-
`48U
`
`WS-
`C3750X-
`24U
`
`WS-
`C3750X-
`48U
`
`WS-
`C3560X-
`24U
`
`WS-
`C3560X-
`48U
`
`Default
`Power
`Supply
`
`Available
`PoE
`Power
`
`PoE+
`Devices
`(30W)
`
`UPOE
`Devices
`(60W)
`
`PWR-C1-
`1100WAC
`
`800W
`
`PWR-C1-
`1100WAC
`
`800W
`
`PWR-C1-
`1100WAC
`
`800W
`
`PWR-C1-
`1100WAC
`
`800W
`
`PWR-C1-
`1100WAC
`
`800W
`
`PWR-C1-
`1100WAC
`
`800W
`
`24
`
`26
`
`24
`
`26
`
`24
`
`26
`
`13
`
`13
`
`13
`
`13
`
`13
`
`13
`
`Table 10. Maximum Number of PD supported with Dual Power Supplies on Cisco
`Catalyst Fixed UPOE Switches
`
`Models
`
`WS-
`C3850-
`24U
`
`WS-
`C3850X-
`48U
`
`WS-
`C3750X-
`24U
`
`WS-
`C3750X-
`48U
`
`Default
`Power
`Supply
`
`Secondary
`Power
`Supply
`
`Available
`PoE
`Power
`
`PoE+
`Devices
`(30W)
`
`UPOE
`Devices
`(60W)
`
`PWR-C1-
`1100WAC
`
`PWR-C1-
`715WAC
`
`1483W
`
`24
`
`PWR-C1-
`1100WAC
`
`PWR-C1-
`1100WAC
`
`1800W
`
`48
`
`PWR-C1-
`1100WAC
`
`PWR-C1-
`715WAC
`
`1483W
`
`24
`
`PWR-C1-
`1100WAC
`
`PWR-C1-
`1100WAC
`
`1800W
`
`48
`
`24
`
`30
`
`24
`
`30
`
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`Cisco Universal Power Over Ethernet - Unleash the Power of your Network White Paper - Cisco
`WS-
`PWR-C1-
`PWR-C1-
`1483W
`24
`24
`1100WAC
`715WAC
`C3560X-
`24U
`
`WS-
`C3560X-
`48U
`
`PWR-C1-
`1100WAC
`
`PWR-C1-
`1100WAC
`
`1800W
`
`48
`
`30
`
`The Cisco Power Calculator helps to calculate the power supply requirements for
`a specific PoE configuration. The results will show output current, output power,
`and system heat dissipation. It also provides the list of power supplies and their
`power management modes that meet the requirements.
`
`For a more detailed power calculation for any specific configuration, use the Cisco
`Power Calculator at http://tools.cisco.com/cpc.
`
`Summary
`Cisco Universal PoE, with its 60W capability, enables wide range of use cases
`with boarder end devices support. It simplifies the enterprise deployment with
`lower OpEx, higher availability, and faster deployment. It provides transparent
`transition with maximum interoperability and backward compatibility with existing
`PoE and PoE Plus deployments. Cisco Catalyst 4500E, industry’s most deployed
`modular access switching platform, is the first in the industry to deliver Universal
`PoE technology. Cisco Catalyst 3850, 3750X and 3560X, industry’s most deployed
`fixed access switching platforms also support Universal PoE technology. Together
`with their high performance, maximum resiliency, deep application visibility, and
`Cisco TrustSec security, Cisco Catalyst 4500E, 3850, 3750-X and 3560-X with
`UPOE continues to enable and transform the next-generation enterprise
`workspaces.
`
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