On Thu, 01 Aug 2013 16:28:05 +0100, Roger Mills wrote:

On 01/08/2013 12:41, Tim Watts wrote:
On Thursday 01 August 2013 12:28 Roger Mills wrote in uk.d-i-y:

If you want your wired and wireless devices to share the same internet
connection, they all really need to be in the same subnet.

Why?


Because they need to be able to see the same gateway (usually the
router's LAN address).

I suppose there might be some scope for mucking about with subnet masks
so that not all devices see the same subnet 'width'.

As others have suggested, I'm not sure that you have fully grasped how
subnets and IP address ranges work.

Or conversely, you are expressing yourself in a way that is not clear.

I assume you know that a physical LAN (set of wires) can support several
logical LANs (IP subnets).

So for example one physical Ethernet network could support 192.168.0.0,
192.168.1.0, 192.168.2.0.

As long as the router can support multiple logical LANs then there is no
requirement for all your local devices to share the same subnet.

Alternatively you can put some of them behind a NAT router on a different
subnet.

In the OP's case it is highly desirable that they do not share the same
subnet, and if possible they use different NAT routers.

However many modern wireless routers can support multiple subnets - this
just doesn't give physical separation which is always a good idea.

Old style routers (business routers) would support a number of logical LANs
on a single physical LAN and route between them or block as required.

Cheers

Dave R