Wireless Access

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Occasional Contributor II
Posts: 37
Registered: ‎05-17-2012

AP225 PoE & PoE +

I have a quick question.

 

Running OS6.3.1 with adding AP225s whats the main difference between PoE and PoE +

 

Reading the data sheets it seems you still get AC with standard PoE but only 3:1 on 2.4GHz but full 3:3 on 5GHz. Could anyone who has deployed these on just standard PoE please give me some feedback,as at the moment thats what our current network switches are.

 

Many thanks.

Guru Elite
Posts: 8,446
Registered: ‎09-08-2010

Re: AP225 PoE

PoE is indicated with the af designation whereas PoE+ would be the at standard.

Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Occasional Contributor II
Posts: 37
Registered: ‎05-17-2012

Re: AP225 PoE

OK,

 

 

We currently have Cisco 2960S PoE + switches and looking at adding AP225s we shouldnt have a problem with these switches should we? The only reason i ask is we've been told that we might have problems not being able to use the AC feature.

Guru Elite
Posts: 8,446
Registered: ‎09-08-2010

Re: AP225 PoE

Those switches support at (PoE+) power so you can use all features of the AP-225. The 11ac features of the 225 are never degredaded due to power. The only things impacted when using af power are the number of spatial streams on the 2.4 radio, the USB port, and eth1.

Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Occasional Contributor II
Posts: 37
Registered: ‎05-17-2012

Re: AP225 PoE

Thank you, I didnt think there would be an issues on those switches. Also using a dual connection the AP only draws power from one of those ports thats correect isnt it?

 

Guru Elite
Posts: 8,446
Registered: ‎09-08-2010

Re: AP225 PoE

Correct. Currently eth0.

The best method for utilizing both switchports would be to do a cross stack port-channel so that if you lose one switch, the AP simply reboots and is able to come up on the other switch (second port).

Since most PoE devices only have one powered-device circuit, they cannot sustain power across both ports and must drop power (reboot) and renegotiate on the second port.

Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Occasional Contributor II
Posts: 37
Registered: ‎05-17-2012

Re: AP225 PoE

Thanks again.

 

How much power do the AP225 draw on an PoE+ switch out of interest? It states max of 15W but whats the reason for using PoE + if thats the case?

 

Guru Elite
Posts: 8,446
Registered: ‎09-08-2010

Re: AP225 PoE

Here's a 225 with both radios in use. 5G using 80MHz channels. 

 

(EDGE-S2500) #show poe interface gigabitethernet 0/0/5

GE0/0/5: Administratively Enable, Port status: On
Maximum power: 30000 mW, Power consumption: 9400 mW
Port voltage: 54800 mV, Port current: 173 mA
PD class: Class-4, Priority: Low, PSE port status: On

 


Tim Cappalli | Aruba Security TME
@timcappalli | timcappalli.me | ACMX #367 / ACCX #480
Occasional Contributor II
Posts: 37
Registered: ‎05-17-2012

Re: AP225 PoE

Thank you once again for your time and help 

 

Aruba
Posts: 429
Registered: ‎05-30-2012

Re: AP225 PoE

Sportmonkey,

We recently did some new testing based upon the new versions of AOS and determined the following maximum loads:

 

Unrestricted mode / Max DC power: 15.5W
Unrestricted mode / Max Powered Device (PD) power: 17W
Restricted mode / Max Powered Device (PD) power: 13.5W

* Above exclude USB consumption

 

We will be updating the datasheet shortly.

 

Best regards,

 

Madani

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