Thus spake "Iljitsch van Beijnum" <[EMAIL PROTECTED]> > On 16-jul-2006, at 20:19, Stephen Sprunk wrote: > >> I think this raises an interesting point; there are many DHCP >> options that would make sense to include in an RA -- basically all >> of the non-client-specific ones. > > Well, then: > >> 1. Create an new RA option that can contain arbitrary DHCPv6 options > >> There's two general solutions to this which would remove the need >> for DHCPv6 in most cases where it's needed today > > DHCPv6 isn't needed today, and the RDNS option makes sure it's not > needed in the future where there is no IPv4 RDNS server configured, > either.
DHCPv6 _is_ needed in many cases today due to devices which require options other than RDNS. For instance, many embedded devices need TFTP servers to boot. Forcing them to implement a DHCPv6 client just to get one option seems wasteful, given part of the justification for the RDNS option is to remove DHCPv6 from beefy devices like PCs. >> If we present a solution just for DNS, are we going to have to work >> on a dozen or more of these drafts, one each for DNS, NBNS, NTP, >> TFTP, etc? > > The difference between DNS and these others is that EVERY general > purpose host connected to the internet needs to have DNS servers > configured, while this isn't true for the other protocols, and/or the > server for these other protocols is much less dependent on the > connectivity of the host at any given moment in time. Not all the world is a PC running a web browser. Lots of embedded devices have no use for DNS. They may need other BootP or DHCP options, though. I don't see why there's resistance to importing either specific DHCP options or the entire lot into the RA, rather than limiting ourselves to RDNS. In fact, RFC 4339 points this out specifically as a problem with the RDNS RA solution. If you allow for other _static_ uses of DHCP, nearly all of 4339's objections go away. S Stephen Sprunk "God does not play dice." --Albert Einstein CCIE #3723 "God is an inveterate gambler, and He throws the K5SSS dice at every possible opportunity." --Stephen Hawking -------------------------------------------------------------------- IETF IPv6 working group mailing list [email protected] Administrative Requests: https://www1.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
