dns discovery discussion report draft-ietf-ipngwg-dns-discovery-01.txt
TRANSCRIPT
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DNS Discovery Discussion Report
Draft-ietf-ipngwg-dns-discovery-01.txt
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The Problem
• Enable name resolution in the absence of a DHCP server (e.g., ad hoc network)
• May use DNS (if server) or mDNS (if not)
• Must be able to determine, if node desires:– 1 or more addresses of DNS servers (if any)– Own domain name– Domain search path
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Team Goal
• Provide analyses of the many possible ways to discover the info needed
• Provide a recommendation as input to the IPNG WG
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Previous Status
• In San Diego, team recommended using site-scoped anycast as the transport mechanism for messages– Also got IPNG WG consensus
• Presented analysis, but not a recommendation, of payload formats– Team continued to discuss payload formats
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Current Status
• Updated I-D to include anycast recommendation
• Team’s last meeting included Olafur Gudmundsson (dnsext WG chair)
• Team achieved rough consensus on a payload format
• Ready to provide rest of recommendation…
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Recommendation
• Use DNS SRV record lookups as payload– Can be done in 1 message exchange– Can be done without changing DNS Servers– Can be done without any DNSEXT WG work
• Use “Other stateful configuration” bit in RA’s to disable this
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Proposed Next Steps
• Update Analysis draft with payload recommendation, and revise DNS section– Eventually publish as Informational
• Start work on a new standards track I-D describing details of actual mechanism– E.g. how to express the desired information in
SRV records