> Every inter-router link must have at least two IP addresses, one for > each > router. The smallest possible subnet in IPv4-over-ethernet that can > contain two addresses is a /30.
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 _______________________________________________ List mailing list [email protected] http://lists.pfsense.org/mailman/listinfo/list
