Re: [dhcwg] /128 address allocation and "localized IPv6 address space exhaustion", was RE: Brokenness of specs w.r.t. client behavior with M&O bits

2008-11-03 Thread H. Peter Anvin
Christian Huitema wrote: > > Let's observe first that while there have been many proposal for variable > length addresses, the length are always somehow bounded. For example, there > will be an address length field in the packet header, and there will be some > limited number of bits to encode

RE: [dhcwg] /128 address allocation and "localized IPv6 address space exhaustion", was RE: Brokenness of specs w.r.t. client behavior with M&O bits

2008-11-03 Thread Christian Huitema
> > I can't see why IPv6 having variable length addresses would have > > prevented people creating NAPT66 if /128s were allocated. > > Human hoarding instinct combined with old practices from the IPv4 days. > You can see similar behaviour in areas where the PSTN uses fixed-length > numbers (e.g. N

Re: [dhcwg] /128 address allocation and "localized IPv6 address space exhaustion", was RE: Brokenness of specs w.r.t. client behavior with M&O bits

2008-11-03 Thread H. Peter Anvin
Mark Smith wrote: > > I'm curious as to why you think this might be the case? > > From what I understand, fixed length addresses were chosen for a few > reasons (a) only CLNS had variable length addresses, verses every other > protocol that didn't (e.g. applelalk, IPv4, IPX etc.), so there was >

Re: [dhcwg] /128 address allocation and "localized IPv6 address space exhaustion", was RE: Brokenness of specs w.r.t. client behavior with M&O bits

2008-11-02 Thread Mark Smith
Hi Peter, On Sat, 01 Nov 2008 17:03:44 -0700 "H. Peter Anvin" <[EMAIL PROTECTED]> wrote: > Brian E Carpenter wrote: > > > >> I would not like to see IPv6 NAPT, but I see that as a real risk if > >> network is using DHCPv6 for allocating hosts just /128 addresses but at > >> the same time is not

Re: [dhcwg] /128 address allocation and "localized IPv6 address space exhaustion", was RE: Brokenness of specs w.r.t. client behavior with M&O bits

2008-11-02 Thread H. Peter Anvin
Brian E Carpenter wrote: I would not like to see IPv6 NAPT, but I see that as a real risk if network is using DHCPv6 for allocating hosts just /128 addresses but at the same time is not willing to delegate prefixes on demand. Agreed. The sad part is that it's probably inevitable given the