Inline power for Cisco 4506

Question

Hello all,
I recently added POE series RJ45 blade to one of my 4506's in order to power some new Cisco WAP's.  The modules are functioning nominally with exception to not getting inline power to any devices.  Here's the skinny:
Here’s a snapshot of the inline power issue:
CORE-WH-4506#sh power detail
Power                                             Fan      Inline
Supply  Model No          Type       Status       Sensor   Status
PS1     PWR-C45-1400AC    AC 1400W   good         good     n.a.
PS2     PWR-C45-1400AC    AC 1400W   good         good     n.a.
Power supplies needed by system    : 1
Power supplies currently available : 2
Power Summary                      Maximum
 (in Watts)              Used     Available
System Power (12V)        710        1360
Inline Power (-50V)         0           0
Backplane Power (3.3V)      0          40
Total                     710        1400
                             Watts Used of System Power(12V)
Mod   Model                 budgeted instantaneous  peak   out of reset  in rese                          t
 1    WS-X45-SUP6-E            260         --        --        260         260
 2    WS-X4448-GB-RJ45         120         --        --        120          72
 3    WS-X4648-RJ45V+E          92         --        --         92          10
 4    WS-X4448-GB-SFP           65         --        --         65          50
 5    WS-X4248-FE-SFP           53         --        --         53          20
 --   Fan Tray                 120         --        --        --          --
       Total                   710         --        --        590         412
                        Watts used of Chassis Inline Power (-50V)
                        Inline Power Admin  Inline Power Oper
Mod   Model                PS     Device       PS     Device     Efficiency
 1    WS-X45-SUP6-E            -        -          -        -           -
 2    WS-X4448-GB-RJ45         -        -          -        -           -
 3    WS-X4648-RJ45V+E         -        -          -        -           -
 4    WS-X4448-GB-SFP          -        -          -        -           -
 5    WS-X4248-FE-SFP          -        -          -        -           -
       Total                   0        0          0        0
Here’s a kick-out from trying to force the interface inline power:
*Dec  9 07:23:36.519: %ILPOWER-5-ILPOWER_POWER_DENY: Interface Gi3/47: inline power denied. Reason: Insufficient inline power, requested(32258) available(0).
What am I missing?

Answer 1

Yes.  Makes sense.  You need to upgrade your 1400w Power Supply to something bigger.  Here's the math: 
Total 710 -- -- 590 412
You've got a 4506 chassis and populated six out of seven slots.  With six slot loaded, the line cards pull up to 710w from your Power Supply.   Now if you look at the Data Sheet for the WS-X4648-RJ45V+E line card it states that this particular line card can support up to 48 ports running 15.4w (or 24 ports at 30w PoE).  The product of 30w & 24 ports is 720.  So if you add up 720 and 710 you get a sum of 1430 which is OVER your 1400w Power Supply.  This is the reason why the line card is complaining.
It doesn't matter if you've got a WS-X4648-RJ45V+E line card and you're going to, for example, plug 10 APs.  When the line card is loaded into the chassis, the line card will immediately "chop" or "slice" 720w off the power supply.  This is how it works.