In message <5274def9.3040...@necom830.hpcl.titech.ac.jp>, Masataka Ohta writes: > Mark Andrews wrote: > > >> Over the cable modem? > > > > Yes. > > OK. > > >> The cable modem is the CPE, which accept the DHCP packet to it. > > > > A cable modem both accepts DHCP packets (for management of the > > modem) and passes DHCP packets through to the customer device. > > Even if the CPE does so, which means there is no NAT, the key > to update rDNS must, naturally, be contained only in DHCP reply > to the CPE.
A cable modem is a media converter. That can be managed and that management interface also uses DHCP is irrelevent. > And, I'm afraid your draft assumes that the CPE behaves as a > DHCP server for local hosts, which means the CPE is responsible > for rDNS registration. My draft assumes the CPE device is a PD client. It may or may not be a DHCP server for the internal network. Again that is irrelevent. > Masataka Ohta -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org
