WS-X4748-UPOE+E poe issue

[scott-goodwin]

Hi Guys,

We have recently deployed the above model line cards to replace our old WS-X4248-RJ45V cards.

Now we are facing a strange issue, whereby some ports/phones work on the new cards and others don't. However all phones work on the old cards.

All the phones are cisco 7960's, sh power below shows ample;

Power                                             Fan      Inline
Supply  Model No          Type       Status       Sensor   Status
------  ----------------  ---------  -----------  -------  -------
PS1     PWR-C45-2800AC    AC 2800W   good         good     good
PS2     PWR-C45-2800AC    AC 2800W   good         good     good

Power supplies needed by system    : 2
Power supplies currently available : 2

Power Summary                      Maximum
(in Watts)              Used     Available
----------------------   ----     ---------
System Power (12V)        743        2473
Inline Power (-50V)      1015        2333
Backplane Power (3.3V)     40          40
----------------------   ----     ---------
Total                    1798        4846

I also noticed that an effected port flaps and seems to show connected 10MB????

Thanks in advance

[Reza Sharifi]

Hi,

What version of IOS XE are you using?

This card works with 3.2.0SG or later.

HTH

[Leo Laohoo · Accepted solution]

Aside from what Reza has posted, your line card will not work because your PS is inadequate.  I believe you need the 4200w or 6000w PS (Table 6 of the link below).

Cisco Universal Power Over Ethernet: Unleash the Power of your Network

[scott-goodwin]

Hi Guys,

I am running Cisco IOS Software, IOS-XE Software, Catalyst 4500 L3 Switch Software (cat4500e-UNIVERSALK9-M), Version 03.03.00.SG RELEASE SOFTWARE.

It would appear I indeed do require the 4200 PS, however why will it not power phones when it shows capacity available??

(in Watts)              Used     Available

----------------------   ----     ---------

System Power (12V)        743        2473

Inline Power (-50V)      1015        2333

Cheers

Scott

[Leo Laohoo]

It would appear I indeed do require the 4200 PS, however why will it not power phones when it shows capacity available??

I can't answer you that.  I don't have this line card.

Hmmm ... So if you connect your phones to other line cards (not the same model) which support PoE, then it works?

[scott-goodwin]

Yes, it is very strange....

[Leo Laohoo]

Maybe the uPoE card won't "power up" the ports until the correct PS is inserted.

[michaelgitonga]

Also, the UPOE line card may consume more power than the old line card leaving less power for the IP Phones, that's why you need the 4200W or 6000W Power Supply

[nicholas.biller]

I am also having this problem, except I have the SUP8-E 15.1(1r)SG2  03.03.00.XO  code.  I am trying to get some phones (8961's) online... when the switch is fresh booted (or module freshly power cycled) ALL phones work for 30-45 mins, and then random ones drop offline.  Ports show down/down and power inline is showing auto/off.   If i reboot the module, they work again for 30-45 mins, again. 

WAP 3702's are not effected by this, even on the same chassis, even on the same line card.  

TAC just told me to try a new IOS... :/  

SUP8-E only has 2 IOS available :/