From: A.G. Ananth Sarma (GMail) (ananth.sarma@gmail.com)
Date: Wed Oct 24 2007 - 14:23:09 ART
Earlier, I tried reducing the power with the command:
power inline static maximum 6300
The phone lost the power totally.
Today, when I tried, the output of the show power inline is :
Temp#sh power inline
Available:370.0(w) Used:159.8(w) Remaining:210.2(w)
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Fa0/1 auto off 0.0 n/a n/a 15.4
Fa0/2 auto off 0.0 n/a n/a 15.4
Fa0/3 auto on 12.9 IP Phone 7941 3 15.4
Fa0/4 auto on 12.9 IP Phone 7941 3 15.4
Fa0/5 auto on 12.9 IP Phone 7941 3 15.4
Fa0/6 auto off 0.0 n/a n/a 15.4
Fa0/7 auto off 0.0 n/a n/a 15.4
Fa0/8 auto on 12.9 IP Phone 7941 3 15.4
Fa0/9 auto on 12.9 IP Phone 7941 3 15.4
Fa0/10 auto on 12.9 IP Phone 7941 3 15.4
Fa0/11 auto on 12.9 IP Phone 7941 3 15.4
Fa0/12 auto on 12.9 IP Phone 7941 3 15.4
Fa0/13 auto off 0.0 n/a n/a 15.4
Fa0/14 auto on 12.9 IP Phone 7941 3 15.4
Fa0/15 auto off 0.0 n/a n/a 15.4
Fa0/16 auto off 0.0 n/a n/a 15.4
Fa0/17 auto off 0.0 n/a n/a 15.4
Fa0/18 auto off 0.0 n/a n/a 15.4
Fa0/19 auto off 0.0 n/a n/a 15.4
Fa0/20 auto off 0.0 n/a n/a 15.4
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Fa0/21 auto off 0.0 n/a n/a 15.4
Fa0/22 auto off 0.0 n/a n/a 15.4
Fa0/23 auto off 0.0 n/a n/a 15.4
Fa0/24 auto off 0.0 n/a n/a 15.4
Fa0/25 auto off 0.0 n/a n/a 15.4
Fa0/26 auto off 0.0 n/a n/a 15.4
Fa0/27 auto off 0.0 n/a n/a 15.4
Fa0/28 auto off 0.0 n/a n/a 15.4
Fa0/29 auto off 0.0 n/a n/a 15.4
Fa0/30 auto off 0.0 n/a n/a 15.4
Fa0/31 auto off 0.0 n/a n/a 15.4
Fa0/32 auto off 0.0 n/a n/a 15.4
Fa0/33 auto off 0.0 n/a n/a 15.4
Fa0/34 auto off 0.0 n/a n/a 15.4
Fa0/35 auto off 0.0 n/a n/a 15.4
Fa0/36 auto on 12.9 IP Phone 7941 3 15.4
Fa0/37 auto off 0.0 n/a n/a 15.4
Fa0/38 auto on 5.0 IP Phone 7911 2 15.4
Fa0/39 auto off 0.0 n/a n/a 15.4
Fa0/40 auto off 0.0 n/a n/a 15.4
Fa0/41 auto off 0.0 n/a n/a 15.4
Fa0/42 auto off 0.0 n/a n/a 15.4
Fa0/43 auto off 0.0 n/a n/a 15.4
Fa0/44 auto on 12.9 IP Phone 7941 3 15.4
Fa0/45 auto off 0.0 n/a n/a 15.4
Fa0/46 auto on 12.9 IP Phone 7941 3 15.4
Fa0/47 auto off 0.0 n/a n/a 15.4
Fa0/48 auto off 0.0 n/a n/a 15.4
Temp#
when I tried the exact command you suggested: *power inline consumption
6300* on one port (My IP phone, of course) got the following out put: ( See
the line in yellow color) and *IT WORKED !!!!!* though it took a minute to
power up:
Temp#show power in
Available:370.0(w) Used:153.2(w) Remaining:216.8(w)
Interface Admin Oper Power Device Class Max
(Watts)
--------- ------ ---------- ------- ------------------- ----- ----
Fa0/1 auto off 0.0 n/a n/a 15.4
Fa0/2 auto off 0.0 n/a n/a 15.4
Fa0/3 auto on 12.9 IP Phone 7941 3 15.4
Fa0/4 auto on 6.3 Ieee PD 3 15.4
Fa0/5 auto on 12.9 IP Phone 7941 3 15.4
Fa0/6 auto off 0.0 n/a n/a 15.4
Fa0/7 auto off 0.0 n/a n/a 15.4
Fa0/8 auto on 12.9 IP Phone 7941 3 15.4
............................... Output suppressed .....
As shown above, it showed up as *IeeePD*. When refreshed, it changed to* IP
Phone 7941*
When i tried the 2nd phone, it worked but I got the follwoing message:
Temp(config-if)#power inline consumption 6300
%CAUTION: Interface Fa0/5: Misconfiguring the 'power inline
consumption/allocation' command may cause damage to the switch and void
your warranty. Take precaution not to oversubscribe the power supply.
Refer to documentation.
Hope this is not going to damage the switch. What do you think?
I going to try the rest of the phones.
Thank you very much for the valuable input.
Regards,
Ananth Sarma
On 10/23/07, Mark Snow <msnow@ipexpert.com> wrote:
>
> Run this command and compare outputs:
>
> sh power inline
>
> You should see something similar to the below output - and check what the
> 1) Available Watts are 2) Used Watts and 3) How much Watts per device is in
> use in the Power column.
>
>
> Available:370.0(w) Used:63.0(w) Remaining:307.0(w)
>
>
> Interface Admin Oper Power Device Class Max
> (Watts)
> --------- ------ ---------- ------- ------------------- ----- ----
> Fa0/1 auto off 0.0 n/a n/a 15.4
> Fa0/2 auto on 6.3 IP Phone 7960 n/a 15.4
> Fa0/3 auto on 6.3 IP Phone 7960 n/a 15.4
> Fa0/4 auto off 0.0 n/a n/a 15.4
> Fa0/5 auto on 6.3 IP Phone 7960 n/a 15.4
> Fa0/6 auto off 0.0 n/a n/a 15.4
> Fa0/7 auto on 6.3 IP Phone 7960 n/a 15.4
> Fa0/8 auto off 0.0 n/a n/a 15.4
> Fa0/9 auto on 6.3 IP Phone 7960 n/a 15.4
> Fa0/10 auto off 0.0 n/a n/a 15.4
> Fa0/11 auto on 6.3 IP Phone 7960 n/a 15.4
> Fa0/12 auto off 0.0 n/a n/a 15.4
> Fa0/13 auto on 6.3 IP Phone 7960 n/a 15.4
> Fa0/14 auto off 0.0 n/a n/a 15.4
>
>
>
>
> The 7941, 7961 support both Cisco Inline Power which is 6.3 watts AND also
> the 802.3af standard which is 15.4 Watts.
> I believe that your phones will display using 15.4 or lesser watts - but
> more than 6.3 watts.
> Keep in mind as someone mentioned your total power budget on that switch
> is 370 watts.
>
>
> So you may need to limit it to each port as someone mentioned using this
> command:
> power inline consumption 6300
>
>
> Having never needed to limit the power on a 7941 and so thus not tested it
> - I don't know exactly what will happen - you may have interesting results
> - such as that your BLP button led's may not light - or screen brightness
> may be at 50% as is the case on the 7970's.
>
>
>
>
>
>
> Let us know!
>
>
>
> Mark Snow
> CCIE #14073 (Voice, Security)
> CCSI #31583
> Senior Technical Instructor - IPexpert, Inc.
> A Cisco Learning Partner - We Accept Learning Credits!
> Telephone: +1.810.326.1444
> Fax: +1.309.413.4097
> Mailto: msnow@ipexpert.com
>
> IPexpert - The Global Leader in Self-Study, Classroom-Based, Video On
> Demand and Audio Certification Training Tools for the Cisco CCIE R&S Lab,
> CCIE Security Lab, CCIE Service Provider Lab , CCIE Voice Lab and CCIE
> Storage Lab Certifications.
>
>
> On Oct 22, 2007, at 4:16 PM, A.G. Ananth Sarma (GMail) wrote:
>
>
> Hi Andrew / Mark,
>
> Thanks for the useful input. I will try andrew's suggestions.
>
> Mark: The phones ate Cisco IP Pphone 7941.
>
> Thanks again for any further input,
>
> Regards
>
> Ananth
>
>
> On 10/22/07, Mark Snow <msnow@ipexpert.com> wrote:
> >
> > Specifically what model of phones do you have plugged into this
> > 3560-48 PWR switch?
> >
> >
> > Mark Snow
> > CCIE #14073 (Voice, Security)
> > CCSI #31583
> > Senior Technical Instructor - IPexpert, Inc.
> > A Cisco Learning Partner - We Accept Learning Credits!
> > Telephone: +1.810.326.1444
> > Fax: +1.309.413.4097
> > Mailto: msnow@ipexpert.com
> >
> > IPexpert - The Global Leader in Self-Study, Classroom-Based, Video On
> > Demand and Audio Certification Training Tools for the Cisco CCIE R&S
> > Lab, CCIE Security Lab, CCIE Service Provider Lab , CCIE Voice Lab
> > and CCIE Storage Lab Certifications.
> >
> >
> > On Oct 22, 2007, at 1:52 PM, A.G. Ananth Sarma (GMail) wrote:
> >
> > > Guys,
> > >
> > > Thanks for the vlauble input. The actual issue here is the phones
> > > beyond
> > > 25th comes up but takes a lot of time say around 8 ~ 10 minutes.
> > >
> > > Is this really a power issue? Are there any workaround to speed up the
> > > process?
> > >
> > > Regards,
> > >
> > > Ananth
> > >
> > >
> > > On 10/22/07, Daniel Fischer <Daniel.Fischer@gmx.net> wrote:
> > >>
> > >> Hi
> > >> the total power budget of a 48 port 3560 poe switch only allows 24
> > >> poe
> > >> devices in the highest power class (15.4Watts) per switch. If your
> > >> phones
> > >> are in the highest class you need to spread them among your
> > >> switches to
> > > stay
> > >> within the 24 poe port threshold. You could also replace the 48 port
> > >> switches with 24 port models to solve your power problem.
> > >>
> > >> Daniel
> > >>
> > >>
> > >> -------- Original-Nachricht --------
> > >>> Datum: Mon, 22 Oct 2007 07:53:48 +0300
> > >>> Von: "A.G. Ananth Sarma (GMail)" <ananth.sarma@gmail.com>
> > >>> An: "Cisco certification" < ccielab@groupstudy.com>
> > >>> Betreff: Voice Query - Unable to use all the ports on 3560 to
> > >>> connect
> > >> IP Phones
> > >>
> > >>> Guys sorry or posting this here. Still I wonder if someone can
> > >>> help me
> > >> in
> > >>> this?
> > >>>
> > >>> We have implemented IP Telephony in our company. We use 3560 PoE
> > >>> - 48
> > >>> port switches.
> > >>>
> > >>> When connecting more than 25 IP phones, it takes lot of time to
> > >>> boot the
> > >>> IP
> > >>> Phones and sometimes they do not come up.
> > >>>
> > >>> The configuration of ports are all same. Is there a known power
> > >>> issue
> > >>> here?
> > >>> Our Cisco dealer says so. Is there any way to tweak the config to
> > >>> accommodate at least 40 ~ 45 IP phones. At present we spread the
> > >>> load in
> > >>> to
> > >>> many 3560 switches with maximum of 25 phones on each.
> > >>>
> > >>> Thanks in in advance.
> > >>>
> > >>>
> > >>>
> > >>>
> > >>> Regards,
> > >>>
> > >>> A.G. Ananthasubramania Sarma
> > >>>
> > >>> ____________________________________________________________________
> > >>> ___
> > >>> Subscription information may be found at:
> > >>> http://www.groupstudy.com/list/CCIELab.html
> > >>
> > >> --
> > >> Psssst! Schon vom neuen GMX MultiMessenger gehvrt?
> > >> Der kanns mit allen: http://www.gmx.net/de/go/multimessenger
> > >
> > > ______________________________________________________________________
> > > _
> > > Subscription information may be found at:
> > > http://www.groupstudy.com/list/CCIELab.html
> >
> >
>
>
>
>
-- Regards,A.G. Ananthasubramania Sarma
Tel: (00971) 2 6315826 (R) Mob: (00971)50-6115913/8120527
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