In message <0780B9D75D1CE23F15B5ABE4@xxxxxxxxxxx>, John C Klensin writes: > --On Monday, December 05, 2011 11:54 -0800 David Conrad > <drc@xxxxxxxxxxxxxxx> wrote: > > > Bob, > > > > On Dec 5, 2011, at 11:36 AM, Bob Hinden wrote: > >> So a CGN deployment is a new deployment and the ISPs choosing > >> to do this could make sure that their customers CPE can > >> support class E addresses, upgrade the CPE firmware, > > > > I think the ISPs are saying that there is a non-trivial base > > of deployed non-upgradable CPE out there now. > > > >> or send them new CPE. > > > > This assumes either (a) the ISP is responsible for the CPE > > and/or (b) the ISP is willing to pay for this. I'm guessing > > these assumptions aren't valid. > > Right. But, unless there is CPE gear out there that is so > locked into a particular 1918 (or other) address range that it > can't use anything else internally (I haven't heard of such > equipment, but maybe it is out there), this is a much stronger > argument for a "dear customer, either renumber or upgrade your > hardware" position than for an allocation that will force that > "renumber or upgrade" position as soon as, e.g., ISPs merge or > discover a need for an extra layer or CGN. > > john It's not that the CPE's can't renumber. The ISP are already using RFC 1918, in good faith, internally to talk to the management interfaces of modems so using RFC 1918 is forcing the ISP's to renumber out of whichever RFC 1918 block that is choosen for this purpose. Customers that are using RFC 1918 addresses, in good faith, are being force to renumber because the IETF is changing the rules retrospectively. Using a RFC 1918 block for this purpose will also force companies to stop using this block internally as it will break routing over VPNs to addresses in this block. Ask everyone everywhere that is using this block, in good faith, for some purpose other than supporting addresses behind a CGN to renumber out of this block of RFC 1918 addresss which is now being re-purposed 16 years after it was allocated. Mark -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: marka@xxxxxxx _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf