From: Chris Riling (criling@gmail.com)
Date: Tue Oct 23 2007 - 21:31:52 ART
It is my understanding that the "E" series switches will allow the full
power (15 mw I think) across every port; I was told the E series is not
oversubscribed, when speaking of power...
Chris
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
>
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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
> > >>>
> > >>>
> > ____________________________________________________________________
> > >>> ___
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> > >> --
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> > >
> > >
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