Dear Jacni, Please see inline.
Cheers, Med ________________________________________ De : softwires-boun...@ietf.org [softwires-boun...@ietf.org] de la part de Jacni Qin [jac...@gmail.com] Date d'envoi : jeudi 27 mai 2010 17:54 À : Lee, Yiu Cc : Durand, Alain; softwires@ietf.org Objet : Re: [Softwires] DNS question about DS-lite On Thu, May 27, 2010 at 1:00 AM, Lee, Yiu <yiu_...@cable.comcast.com<mailto:yiu_...@cable.comcast.com>> 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. Med: If you really want to provision an IPv4 address of the DNS server, you can inspire from what we proposed for PCP: http://tools.ietf.org/html/draft-bpw-softwire-pcp-dhcp-01#section-3.1 and convey an IP4-mapped IPv6 address (representing the IPv4 address of your DNS server) in the DHCPv6 option. BTW, it is recommended to send DNS queries over IPv6 to avoid crossing the AFTR for various reasons (avoid nating DNS messages, better ports usage in the AFTR since DNS traffic represents an important amount of messages issued by various applications, incremental migration of network services to IPv6: DNS and NTP for instance). ********************************* This message and any attachments (the "message") are confidential and intended solely for the addressees. Any unauthorised use or dissemination is prohibited. Messages are susceptible to alteration. France Telecom Group shall not be liable for the message if altered, changed or falsified. If you are not the intended addressee of this message, please cancel it immediately and inform the sender. ******************************** _______________________________________________ Softwires mailing list Softwires@ietf.org https://www.ietf.org/mailman/listinfo/softwires
