HP (Hewlett-Packard) J8161A manuale d’uso

hp pr oc urve P oE plannin g and im pl e me n ta tio n guide w w w .hp .com/go/hp pr oc urve Po E P ow e r o ver Et he r net De vi ce s[...]

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HP ProCurve PoE Planning and Implementation Guide[...]

© Copyright 2003 He wlett-Pa ckard Development Compa ny , L.P . The information contained herein is subject to change without notice. Th is document con t ain s proprie tary informatio n, which is prote c ted by cop y r ight. No pa rt of this do cu me nt may be ph ot ocopied , r e prod u ced, o r tran sl atio n into an ot her la nguage without the[...]

Contents 1 Introduction Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Power T h rough the Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 PoE Capabili ti es o f th e Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2 O [...]

HP P r oCu r ve S wit ch xl Po E Module Confi g urations . . . . . . . . . . . . . . 3-8 With an HP 6 00 RPS/EPS Pow e ring One Module . . . . . . . . . . . . . . 3-8 With an HP 6 00 RPS/EPS Pow e ring Two Modules . . . . . . . . . . . . 3-9 Infrastructure Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 G[...]

1 Introduction Introduction Thi s chap ter provides an overvie w of Po wer over Ethernet (PoE) and a li st of reasons w hy a user might want to impl ement PoE in their environment. It discusses how PoE transmits power over twi s ted pair cable a n d the capabili - ties of the devices used to provi d e PoE . Overview Pow e r ove r Ethernet technolog[...]

Introduction Overview Power Over Ethernet conn ect ion s t o embedded computers wi ll al low much cheaper installation (no AC ca bling, lowe r labor costs), facilitate updating the in stal la tion and reposi t ioning o f sen s ors without el ect ricia ns, whil e mai n- taining fu ll co ntrol over every node t h rough the Internet , with V oIP and w[...]

Introduction Overview Power Through the Cable A standard CA T5 Ethernet cabl e has four tw is ted pai r s, b ut only two of these pairs a re used for 10Base- T and 100Ba s e-TX data. The specific a tion allow s two options for u sin g these cables f or power: ■ The spare pairs are used. The pair on pins 4 and 5 are co nnect ed together and form t[...]

In troductio n Introduction Overview Th e HP ProCurve S wit ch xl PoE Mod ule (J8161A) i s a module for the HP ProCurve 5300 xl Swi t ch and has 24 au to-sensing 10/100- TX RJ-45 ports. All 24 ports are c a pable of supplying PoE powe r . However , for the module i t sel f to be abl e to sup ply PoE power i t first mu st be con n ect e d t o an EPS[...]

2 Operating Rules Operating Rules This chapter discusses th e operating rul es an d characteristics of PoE and describes the capabilities of a device us ed to pr ovi d e redundan t and ext e rnal PoE power , the HP ProCurve 600 Red undant and External Po wer Su ppl y (J8168A), herea f ter referred to as the HP 600 RPS/EPS. The HP 60 0 RPS/EPS is an[...]

Operating Rule s Operating Rules Externa l Switch Power Op erati ng Characteristics. Th e HP 600 RPS/EPS has six RPS ports, each o f whi c h can p r ovi d e redun dant +12V pow er to a conne c ted swi t ch, but o n ly one port can provide thi s power at a g i ven time . I f a switch wit h no AC p owe r i s co nnected to an operating HP 600 RPS/EPS,[...]

Operating Rules External Switch Power Maximum PoE Power The Swi t ch 2626-PWR provisi o ns (allo cates pow er to) ports 1-24 w i th 406 watts of power for PoE ap plications compat ible with the I EEE 802.3af stan- dard. The Switch 2650-PWR provisi o ns port s 1 - 48 with 40 6 watt s. This reduce s the per port wattage by half as comp ared to the Sw[...]

Operating Rule s Operating Rules Externa l Switch Power The Switch 2626-PWR has 24 ports and it s internal PoE powe r supply provides 406 watts a c ross all 24 ports. If an HP 600 RPS/EPS devic e is connected to the Switch 26 26-P WR f or th e purpo se of sup ply in g exte rnal power to the Po E porti o n of the switch, there will be ei ther 368 wa[...]

Operating Rules External Switch Power Switch Priority Class Port priority classification can be used by the swi t ch to all o cate power to ports. It is a pr ioritizati on sche me by w h ich the user can a ssign a lo w (defau lt ), high , or critical priority to any giv e n port. Th i s as signment i s done th roug h the comma nd li ne interface (s[...]

Operating Rules Externa l Switch Power T able 2-2. Power Usage Class U sage Minimum Power Levels Range of Maximum at Output of PSE Power required by the PD Operating Rule s 0 D efault 1 5.4 W a tts 0.44 to 12.95 W a tts 1 O ptional 4.0 W a tts 0 .44 to 3.84 W a tts 2 O ptional 7.0 W a tts 3 .84 to 6.49 W a tts 3 O ptional 15.4 W a tts 6.49 to 12.95[...]

3 Planning Planning This chapt er di scusses the planning pr ocess a user should fo llo w to success- fully implement a PoE sw itch. After und erstanding what PoE is and its operating rul e s, the next ste p to implem entation is planning . The fol l owi n g is an exampl e list of con sid erati ons during t h e plann ing phase: ■ What devic e s w[...]

Plannin g Planning Supported Products Supported Products The HP ProCurve Switch 2 600-PWR Series dev i ce s and the HP ProCurve Switch xl PoE Modu le support any products that meet the IEEE 802.3af PoE standard. Number of PDs per Switch Th e number o f PDs sup por ted per sw it ch depends on th e power allocat ion an d ho w muc h power eac h PD us [...]

3-3 Planning Planning Your PoE Configuration Planning HP ProCurve 2626-PWR Configurations The tables in the two example configur ations contain entri es that show the PoE power available when the 2626-PWR is used alone. When use d with the HP 600 RPS/EPS unit, PoE power is av ailable to the PoE ports should the internal PoE power supp ly fail. T ab[...]

3-4 Planning Planning Your PoE Configuration Planning W ith an HP 600 RPS/EPS Powering T wo Switches ■ When two switches are connected to the RPS 600 RPS/EP S ports, the PoE power available to each switch is a maxi mum of 184 W . If all of your PDs consume on average less than 7.6 W each (all owing for any line loss) then all 24 ports wi ll recei[...]

Planning Planning Your PoE Configuration HP ProCurve 2650-PWR Configurations The tables in the two exampl e configur ations contain entri es th at sho w the PoE pow e r available when the 2650- PWR is used alone. Whe n use d wi th the HP 6 00 RPS/EP S unit , ad ditio nal PoE po we r i s avail a bl e to the PoE po rts an d PoE pow e r is available s[...]

3-6 Planning Planning Your PoE Configuration Planning W ith an HP 600 RPS/EPS Powering One Switch ■ The lowest loaded bank of ports (1- 24 or 25-48) has 38 watts reserved. That power is avail able for use by th e two hi ghest priority ports in the bank, (in a default conf iguration ports 1 an d 2, or 25 and 26). Source of Power Watts Available # [...]

3-7 Planning Planning Your PoE Configuration Planning W ith an HP 600 RPS/EPS Powering T wo Switches ■ The lowest loaded bank of ports (1-24 or 25 -48) has 38 W reserved and is ‘bank 2’ in the table above. Source of Power Watts Available # of Ports Powered and Average W atts/Port Redundant # of Ports Powered and A verage W atts/ Port Internal[...]

Planning Planning Your PoE Configuration HP ProCurve Switch xl PoE Module Configurations For the H P Pro Cur ve Switch xl PoE M o dule t o functio n it m u st be insta lle d in an HP ProCurve Switch 5 300xl. The modu le will receive it’ s operational power fr om the swi t ch and it ’ s PoE powe r from the HP 600 RPS / EPS. W i th an HP 600 RPS/[...]

Planning Planning Your PoE Configuration W i th an HP 600 RPS/EPS Powering T w o Modules In this example there are two modules connected to the HP 60 0 RP S/EPS, therefore each modu le w ill be supplie d with 184 wa tts of PoE powe r to be distributed to e ach module s 24 ports at 7.6 w a tts per port. Planning      ?[...]

Plannin g Planning Infrastructure Requirements Infrastructure Requirements Air conditioning . Power sup plies crea te a g rea t amount of heat. Ensure you have enough cool ai r to maintain an ambient temperature betwe en 0 ° C to 55 ° C (32 ° F to 13 1 ° F) aro und the swi t ch de vi ces i n si de th e rack . Power requirements .E nsur e you h [...]

Gloss a ry Glossary activ e Po E port - PoE-enabled port connected to a PD request pow er . priority class - Refers to the type of power priorit i zat i on where the swi t ch us es Low (the d efa ult), High, and Cri t ical pri ority assignm ents to det e rm in e which groups of ports will receive pow er . Note that pow e r priority rule s ap ply on[...]

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Index- C cable power t h roug h … 1-3- class method priority … 2 -4- E EPS allocation … 2-2- EPS power … 1-4- example configurations … 3 -2- H HP 600 RPS/EPS external p o wer s upply … 2-2- oper a tion … 2 -1- redundant power cha r acteristics … 2 -2- redundant power s upply … 2 -1- HP ProCurve Switch xl PoE Mod u le … 1 -4 – [...]

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T ec hnical inf or mati on in t his d oc ume nt is su b j ect t o ch ange w ithou t n o ti ce . ©Cop yri ght 200 3 Hew lett-P ack ar d Dev elopment C ompan y , L.P . Re pr odu ction , ada pt atio n, o r transl ation wit hout p ri or wr it te n pe r missi on is p r o hibit ed ex ce pt as all o w ed under t h e co p yr i ght l aw s. Pr inted in T ai[...]