RE: A Zeroconf situation?

> Now, a static/DHCP IPv4 addressed device on the same broadcast domain
> wants
> to discover that type of device (or set of devices) in the domain, and
> configure them, in a uPnP sort of way, or maybe through a web browser.
I
> envision maybe a multicast address for discovery?

UPNP discovery is implemented using SSDP, which does indeed use
multicast. However, since you mention UPNP, you should consider this
excerpt from the UPNP architecture specification
(http://www.upnp.org/download/UPnPDA10_20000613.htm):

	The foundation for UPnP networking is IP addressing. 
	Each device must have a Dynamic Host Configuration 
	Protocol (DHCP) client and search for a DHCP server 
	when the device is first connected to the network. 
	If a DHCP server is available, i.e., the network is 
	managed, the device must use the IP addressed assigned 
	to it. If no DHCP server is available, i.e., the network 
	is unmanaged; the device must use automatic IP addressing 
	(Auto-IP) to obtain an address.

Auto-IP refers to the automatic address allocation protocol used in
versions of Windows since 98, i.e. the protocol that zeroconf is trying
to standardize. 

-- Christian Huitema