I wonder how is "unnumbered connection" mechanism may be useful for xDSL links? As far as I understood, "unnumbered" is supposed to save IP addresses range (good for ISP) and can have benefits on routers basically. At the same time I came across few IP-sharing devices (raoughly speaking NAT), where WAN link's DSL based (unfirtunately I didn't have time to research those devices in details).
Hopefully someone, who worked with these types of devices, may explain me the point.
Thanks in advance.
With best regards, Roman Mashak. E-mail: email@example.com