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| # Automatically generated CODEOWNERS | ||
| # Regenerate with `make update-codeowners` | ||
| draft-lenders-dns-llns.md [email protected] | ||
| draft-lenders-dns-cns.md [email protected] |
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| @@ -1,4 +1,4 @@ | ||
| # License | ||
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| See the | ||
| [guidelines for contributions](https://github.com/anr-bmbf-pivot/draft-lenders-dns-llns/blob//CONTRIBUTING.md). | ||
| [guidelines for contributions](https://github.com/anr-bmbf-pivot/draft-lenders-dns-cns/blob/main/CONTRIBUTING.md). |
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| @@ -1,9 +1,9 @@ | ||
| --- | ||
| title: "Guidance on DNS message composition over Low-Power and Lossy Networks (LLNs)" | ||
| title: "Guidance on DNS message composition in constraint networks" | ||
| abbrev: "TODO - Abbreviation" | ||
| category: bcp | ||
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| docname: draft-lenders-dns-llns-latest | ||
| docname: draft-lenders-dns-cns-latest | ||
| number: | ||
| date: | ||
| consensus: true | ||
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@@ -20,8 +20,8 @@ venue: | |
| type: Working Group | ||
| mail: [email protected] | ||
| arch: "nicfs.nic.ddn.mil:~/namedroppers/*.Z" | ||
| github: "anr-bmbf-pivot/draft-lenders-dns-llns" | ||
| latest: "https://anr-bmbf-pivot.github.io/draft-lenders-dns-llns/draft-lenders-dns-llns.html" | ||
| github: "anr-bmbf-pivot/draft-lenders-dns-cns" | ||
| latest: "https://anr-bmbf-pivot.github.io/draft-lenders-dns-cns/draft-lenders-dns-cns.html" | ||
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| author: | ||
| - fullname: Martine Sophie Lenders | ||
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| normative: | ||
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| informative: | ||
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| RFC7228: cns | ||
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| --- abstract | ||
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| # Introduction | ||
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| Low power and lossy networks (LLNs), such as IEEE 802.15.4 or LoRaWAN, often come with restrictions | ||
| Constrained networks {{-cns}}, such as IEEE 802.15.4 or LoRaWAN, often come with restrictions | ||
| to the protocol data unit (PDU) in the link layer. While adoption layers such as 6LoWPAN | ||
| {{?RFC4944}} and SCHC {{?RFC8724}} provide mitigation in the form of compression and fragmentation | ||
| to allow for IPv6 traffic, restricting the application data to a minimum size greatly increases | ||
| reliability. This document provides guidance on the composition of DNS messages to prevent | ||
| fragmentation in LLNs. | ||
| fragmentation in constrained networks. | ||
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| # Terminology | ||
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| {::boilerplate bcp14-tagged} | ||
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| # LLN Node Considerations | ||
| # Constrained Node Considerations | ||
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| Nodes within an LLNs are only to assumed stub resolvers. That means they only query information from | ||
| an upstream DNS server but MUST NOT distribute DNS information, possibly received from an upstream | ||
| DNS server, themselves. | ||
| Nodes within an constrained networks are only to assumed stub resolvers. | ||
| That means they only query information from an upstream DNS server but MUST NOT distribute DNS | ||
| information, possibly received from an upstream DNS server, themselves. | ||
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| # DNS Server Consideration | ||
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| A DNS server that is aware that the querying node is a node within an LLN SHOULD resolve a CNAME | ||
| A DNS server that is aware that the querying node is a node within a constrained network SHOULD | ||
| resolve a CNAME | ||
| until the originally requested resource record type is reached. This reduces the number of message | ||
| exchanges within an LLN. | ||
| exchanges within a constrained network. | ||
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| The DNS server SHOULD send compact answers, i.e., additional or authority sections in the DNS | ||
| response should only be sent if needed or if it is anticipated that they help the DoC client to | ||
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