i agree with you that dns proxy over v6 in B4 should be preferred, while we should mention this special case in the draft, because this will be not so special if many hosts running that kind of OS still exist at the time when we start to implement DS-Lite. and the recommendations for dealing with this case may be also included.
regards, Jacni On Fri, May 28, 2010 at 12:30 AM, Lee, Yiu <[email protected]>wrote: > Agreed that there is no v4 dns server option (probably never will be) > defined on dhcpv6. If the host doesnt want to statically configure the v4 > dns server, in theory, the B4 could send a dhcpv4 dns request over the > tunnel and the AFTR would relay it to a dhcpv4 server. But you can see, this > is overkilled. The more sensible way is to implement dns proxy in B4. > > > On May 27, 2010, at 11:55 AM, "Jacni Qin" < <[email protected]> > [email protected]> wrote: > > > On Thu, May 27, 2010 at 1:00 AM, Lee, Yiu < > <[email protected]><[email protected]> > [email protected]> wrote: > >> >> If the B4 is in the host, the B4 implementation should be able to proxy >> the v4 DNS request over v6. Or B4 tunnels the DNS message and sends to a v4 >> DNS server (less desirable). >> > > -- while as mentioned in the draft, currently there is no option defined > for passing the v4 DNS server address to hosts. > and for the DNS proxy case, do you mean if the OS doesn't support DNS > request over v6, we should then provider a patch for this function along > with the B4 implementation? > > thanks, > > >> >> >> On 5/26/10 12:47 PM, "Jacni Qin" < >> <http://[email protected]><[email protected]> >> [email protected]> wrote: >> >> another question, >> >> for the host scenario(with DS-Lite software installed), what if the >> operating system can not send DNS query over IPv6? >> i'm sorry if i missed some discussion on this before. >> >> many thanks, >> >> Jacni >> >> On Wed, May 26, 2010 at 10:33 PM, Lee, Yiu >> <<http://[email protected]><[email protected]> >> [email protected]> wrote: >> >> The B4 element contains a DNS proxy that will support DNS over v4 and >> proxy >> the DNS messages to the DNS server over v6 in the ISP network. The DNS >> server in the ISP must be able to resolve all the A and AAAA records. >> >> >> On 5/26/10 5:26 AM, " >> <http://[email protected]><[email protected]> >> [email protected]" >> < <http://[email protected]> <[email protected]> >> [email protected]> wrote: >> >> > Hi Alain, >> > I have one question about DS-lite. Would you please clearify it? >> Thanks. >> > >> > In your draft, you mention the B4 element can only get the IPv6 >> address >> > of a DNS recursive server, and as such will have to perform all DNS >> > resolution over IPv6. I want to know whether the DNS server can resolve >> all >> > IPv4 nodes over IPv6 successfully. And how? Is it necessary that the >> type A >> > DNS query packet travels through AFTR? Is there any requirement for the >> DNS >> > server in the ISP core network? >> > >> > Best Regards, >> > ------------------------------------ >> > Zhenqiang Li >> > 13911635816 >> > Department of Network Technology >> > China Mobile Research Institute >> > 2010-05-26 >> > _______________________________________________ >> > Softwires mailing list >> > <http://[email protected]> <[email protected]>[email protected] >> > <https://www.ietf.org/mailman/listinfo/softwires><https://www.ietf.org/mailman/listinfo/softwires> >> https://www.ietf.org/mailman/listinfo/softwires >> >> _______________________________________________ >> Softwires mailing list >> <http://[email protected]> <[email protected]>[email protected] >> >> <https://www.ietf.org/mailman/listinfo/softwires><https://www.ietf.org/mailman/listinfo/softwires> >> https://www.ietf.org/mailman/listinfo/softwires >> >> >> >> >
_______________________________________________ Softwires mailing list [email protected] https://www.ietf.org/mailman/listinfo/softwires
