Getting confused with P, LP and FP switches

[SCC]

Hi All,

I am getting so much confused with P, LP and FP Model of Switches

24P - All 24 ports will be PoE

48LP - LP means Half of the ports will be PoE

48FP - All 48 Ports will be PoE

Is this correct.

[AjitKumar]

Hi @SCC 

This is what I Understand.

Meraki Switches P,LP,FP are "All Ports" POE Switches. However POE budget differs

Ex.

24P  - All 24 ports will be PoE with a Power Budget of 370W

48LP (Low Power) - All 24 ports will be PoE with a Power Budget of 370W

48FP (Full Power) - All 24 ports will be PoE with a Power Budget of 740W

[SCC]

@AjitKumar 

Why you are specifying All 24 ports in front of 48 port PoE switch.

48LP (Low Power) - All 24 ports will be PoE with a Power Budget of 370W

48FP (Full Power) - All 24 ports will be PoE with a Power Budget of 740W

If i need 24 Port PoE switch all 24 ports should be PoE

and if i need 48 Port PoE switch all 48 ports should be PoE.

[BrechtSchamp]

You can use PoE on all ports, but depending on the available budget you couldn't use it on all at the same time.

[AjitKumar · Accepted solution]

@SCC 

Apologies that's TYPO Copy / Paste Mistake.

48LP (Low Power) - All 48 ports will be PoE with a Power Budget of 370W

48FP (Full Power) - All 48 ports will be PoE with a Power Budget of 740W

[BrechtSchamp]

You shouldn't think of it in terms of the number of PoE ports. Think of it in terms of the total available PoE budget. This is a value you'll find in the datasheet. This budget combined with the individual power required by your devices will determine how many of those devices you can connect to the switch.

For example:

Let's say we want to power MR42 access points. Their datasheet states:

Power consumption: 20 W max (802.3at)

If we then consider the following:

MS210-48LP includes 370W =~ 20 * 18
MS210-48FP includes 740W =~ 37 * 20

Then it's easy to see that we can power 18 of them with the 48LP and 37 with the FP.

[SCC]

I will be only connecting the Yealink IP Phone , and one IP Phone consume 3 watt of power or MR33 access point.

[IanH]

Worth note that some of the switches don't have the same naming convention as others, so you can't follow the same naming pattern for each switch type throughout the Meraki Switch portfolio.

EG:  MS120-8 Vs MS120-24:

MS120-8

https://meraki.cisco.com/products/switches/ms120-8

MS120-24

https://meraki.cisco.com/products/switches/ms120-24

Under Product Highlights in each section where the Power/PoE is mentioned, it will tell you what the naming convention is for each switch.

Once you've reviewed this, take a look at the Data Sheet at the bottom of each page and then you can study what is available for each seperate switch.

Once you have this information, you can start to use the calculations that @AjitKumar and @BrechtSchamp have provided with you so far on PoE per switch.

Don't just use P, LP and FP for every switch as it doesn't always work in that manner...