From: Mark Snow (msnow@ipexpert.com)
Date: Tue Oct 23 2007 - 14:16:29 ART
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
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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
> >
> >
> ______________________________________________________________________
> > _
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