/32 subnets on Ethernet via DHCP

itemprop="text">

Is it possible
to assign to an ethernet host via DHCP a subnet mask of only the host itself, e.g.
192.168.1.123/32? Do common operating systems support this kind of
configuration?

I'd like for the hosts to send
all of their traffic to the router (and not directly to some other host on the same
segment), but still for them to be able to communicate (so no "client isolation");
effectively creating a point-to-point link, but without any client-side
configuration.

Update: My intention is to
configure a home router running dd-wrt so that all the traffic has to pass through the
IP stack on the router, so it can be filtered by some ipfilter rules. I'd hoped for a
general solution, some standard way to implement point-to-point Ethernet connections
that still can be automatically configured by DHCP for all commons operating
systems.

Based on the responses so
far, this doesn't seem to be that easy; I'll read some more about VLANs and then
reconsider my plans.

itemprop="text">

class="normal">Answer

First of
all, in order to create point-to-point link, you need at least 4 addresses, so you'll
have to use a /30 mask. For example:
192.168.1.0/30

• Network
  address: 192.168.1.0/30


• 1st point address:
  192.168.1.1/30


• 2nd point address:
  192.168.1.2/30


• Broadcast address:
  192.168.1.3/30

You'll
have to place each host on a different /30 subnet and implement inter-subnet routing on
your gateway.

Edit:
You don't write
much about your infrastructure or the scalability you want to achieve with this
configuration. I suppose your router supports the use of
subinterfaces.

Also, no additional client-side
configuration will be required if you use a DHCP server in order to distribute the
addressing scheme.