> Well, if you want to get technical, the minimum possible subnet in > IPv4 over Ethernet is actually a /31. $employer uses these > religiously in PtP Ethernet links, and they work flawlessly. > Unfortunately, *BSD doesn't seem to implement RFC3021, which is > really a pity, because it means all my firewalls use twice as many > IPs as necessary on their uplinks. > > http://tools.ietf.org/html/rfc3021 > > But IPv6 solves all that with its utterly inexhaustible address > space. Hurrah. Oh, wait, we still have to do IPv4 for some time? > Guess we're stuck with RFC1918 addresses for PtP links once the > runout is done. Oh well, who needed functional inter-AS > tracerouting anyways? > > </podium> > > Nathan Eisenberg
I think the entire ISP operation I partly run has... three routers that support it, AFAIK. So for all practical intents and purposes, that doesn't exist for me. It would be nice, most definitely, if it were supported by more equipment, but it's just not (in my corner of the world, anyway). So yes, for equipment that supports it, you're right - a /31 is the smallest IPv4-over-ethernet subnet. (There's also a philosophical point of whether Ethernet can ever truly be a PtP media even when physically connected PtP...) -Adam _______________________________________________ List mailing list [email protected] http://lists.pfsense.org/mailman/listinfo/list
