[cisco-voip] 802.3at and the 9971 / VXC 2112

[Mike King]

I'm running 8.5.1 and we loaded the latest device pack on cisco's website
the week of December 28th.
I've updated to firmware 9-2-3

I've narrowed it down to a LLDP-MED problem.  I just need to figure out
who's problem it is.   I have a juniper switch, and apparently Juniper and
Cisco are not agreeing on the LLDP packets.

>From the phone, I'm getting TLV timeout
on the switch, i'm getting TLV discarded

I've opened a support case with Juniper, since it's actively making
a decision, versus the phone that is just patiently waiting for a response.
That's not to say that the Phone might be sending a malformed request.  I'm
sure the first thing the Juniper TAC is going to have me do is a packet
capture.

Fun times, wohoo.

 Mike

On Wed, Jan 18, 2012 at 10:25 AM, Ryan Ratliff <rratliff at cisco.com> wrote:

> What CUCM are you running?  The parameter Adam mentioned is called "Power
> Negotiation" and should be present on the phone page in CCMAdmin.
>
> You should enable the Power Negotiation feature when connected to a switch
> that supports power negotiation. However, if a switch does not support
> power negotiation, then you should disable the Power Negotiation feature
> before you power up accessories over PoE. When the Power Negotiation
> feature is disabled, the phone can power up accessories up to 12.9W
>
>
> -Ryan
>
> On Jan 17, 2012, at 5:20 PM, Mike King wrote:
>
> I'm currently running sip9971.9-2-2
>
> But I'm not sure how that helps me.  :-)
>
> On Tue, Jan 17, 2012 at 4:18 PM, Adam Frankel (afrankel) <
> afrankel at cisco.com> wrote:
>
>>  With the fix for CSCtl08010, you should be able to disable power
>> negotiation at the device/common/enterprise level in CUCM.
>>
>> You also need 9.1(1) or newer firmware.
>>
>> Adam
>>
>>
>>  ------------------------------
>> *From:* Mike King <me at mpking.com> <me at mpking.com>
>> *Sent:* Tue, Jan 17, 2012 2:49:36 PM
>>
>> *To:* Cisco VoIPoE List <cisco-voip at puck.nether.net><cisco-voip at puck.nether.net>
>> *CC:*
>> *Subject:* [cisco-voip] 802.3at and the 9971 / VXC 2112
>>
>>  We have a 9971 phone with the VXC 2112 backpack, and we've connected it
>> to one of our Juniper switches that provide 802.3at power.
>>
>>  However the backpack (or the camera) does not appear to work with it.
>> (Works fine with the power cube)
>>
>>  Is there anything we have to do to enable PoE Plus (802.3at)?  I know
>> the switch is providing it. (Its registering it as a class 4 device, but
>> the phone is only drawing 7.4W, out of a Max of 30W)
>>
>>  Mike
>>
>>
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>>
>>
>>
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