[AusNOG] Single Switch Full 48-Port PoE Support

[Craig Askings]

Hi Tim,

The Juniper EX2200-48P-4G has a power budget of 405w, I'm not sure on the ability to manually set power budgets per port however. It's 1ru in size and fairly quiet.

http://www.juniper.net/us/en/local/pdf/datasheets/1000307-en.pdf

Craig.

On 11/09/2013, at 12:09 PM, Tim March <march.tim at gmail.com> wrote:

> 
> Hey Guys...
> 
> A customer of mine needs to replace a bunch of non-PoE 48-port switches
> with PoE switches. Each of the switches will be required to power 48 IP
> phones. Due to a range of circumstances all relating to planning
> failures we need to use like-for-like form-factor ($n x 48 Port PoE
> Switches) to drive the phones.
> 
> The phones are Polycom VVX 500 that draw a maximum of 5W per port for a
> total of 240W per switch. We've bene looking at 2960's and this fits
> nicely within it's 370W PoE budget. However, the .3af advertisement from
> the phone gets interpreted as Class-0 (15.4W) and the switch will only
> power >= 28 devices concurrently.
> 
> On the Catalyst we're able to get around this (I think?) with the `power
> inline max` config directive to force it to spread the power budget
> across all ports.
> 
> For what we're trying to do a set of 2960's will come in around $25k.
> 
> My question is: Can any of you guys suggest cheaper switches that will
> allow us to run 48 x 5W PoE from a single device with the ability to
> ignore the 15.4W .3af advertisement that will tell the switch to shut
> down the additional ports?
> 
> 
> 
> Cheers,
> T
> 
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