One SSID across multiple access points

You need to do some more research - powerline is a technology that allows you to piggyback data across your power wiring - it is not a single product, and it does not necessarily provide wireless access.

You will need a minimum of two powerline devices, one to "put the data in" to the powerline network, and one (or more) to "get the data out", yes, you can have multiple powerline WiFi units, yes, you can use them all with the same SSID & encryption keys, however, I will not guarantee "seamless roaming", and to be honest, with powerline I wouldn't even guarantee a connection.

Powerline technology use the power wiring to transmit the data, and electrical interference can sometimes be a major problem - if you're in a building with older wiring or appliances, you may be disappointed - and - unless you have your own power transformer, your neighbors wiring & appliances can also be a source of interference.

If I were in your position I would go for several wired access points and pull Ethernet cable back to a single router.

guzzifrank wrote:
I have a larger home with multiple areas with dead wireless zones. I want to use the powerline products to basically flood the total area but with one SSIS and passphrase. Ideally I want to be able to walk through the three floors and stay on my smart phone or tablet. Multiple SSID would just confuse people.

That is what I do.

But, I am with fordem when it comes to the strategy. Where possible, use "hardwired" connections to the Powerline Ethernet.

In my case I have four Netgear Powerline plugs. (XWN5001 and XAVB5101). One eats the Ethernet from the modem/router. Two are connected to hard wired devices (a smart Samsung Blu Ray player and a Denon Internet radio).

I also have a XWNB5201 wifi extender Homeplug that broadcasts using the same SSID as the modem/router. At times I have also added a Netgear WN2000RPT wireless extender to the network. It works just fine.

Oh, my house wiring is old. It even spans out to a separate building with its own fuse box, and yet the Ethernet still travels to the other building. I even use mains extension blocks, so I am breaking all of the Powerline rules with little obvious effect.

many thanks. I fully understand the powerline model. I was looking more for comment on using multiple wireless components using the same ssid and allowing the wireless users to basically roam from one physical area of the large home to another.

Properly setup - single SSID, single encryption key, single DHCP server and your WiFi channels selected for minimal interference, you be as close to seamless roaming as you can get without a wiFi controlled installation.

You may experience momentary disconnections - for example - if you were in a Skype video call on a tablet whilst walking, you might lose the call, but the tablet will reconnect and you would simply need to call back .