Session Date/Time: 26 Jul 2023 16:30

dtn

Summary

The DTN working group session at IETF 117 covered several topics, including updates on the IPN URI scheme, network management architecture, COSE security context, EID patterns, a YANG model for BP, BP over Ethernet, applications over BP, and IPN URI allocator allocation. Key discussions revolved around interoperability, governance, and the best approach for various technical challenges.

Key Discussion Points

IPN URI Scheme Update: Discussion on service definition, the registry for well-known services, interoperability concerns, and allocation policies. There was disagreement on whether the bpv7 registry would be based on the existing bpv6 registry.
DTN Management Architecture Update: Clarifications around the DTNMA agent autonomy engine (now a policy execution engine), rule-based management, event condition action format for autonomy rules, and conflict detection.
Data Model (ADM) Update: Overview of changes to the ADM, including typing, handling failures, processing models for macros, expressions, and port templates. Discussion on separation of autonomy capabilities and encoding ADMs as a profile of the YANG modeling language.
COSE Security Context Update: Expansion of AAD scope to include other blocks in the bundle for signing/encryption.
Bundle Protocol YANG Model: Presentation of a YANG model for managing BP nodes, with early review considerations around node versions and neighbor CLAs.
BP over Ethernet: Proposal to put bundles directly into Ethernet frames, discussion of single sender/receiver agents, MTU, fragmentation, reassembly, and multiplexing BPV6 and BPV7.
Applications over BP (HTTP, SMTP): Discussion on informational documents describing application layer concerns when writing applications for delayed/disrupted environments. Questions raised on scope.
IPN URI Allocator Allocation: Concerns raised about potential bias or inconsistency in expert review for allocator ID allocation and consideration of hierarchical allocation.

Decisions and Action Items

IPN URI Scheme: Take discussion of the differences between bpv6 and bpv7 to the mailing list.
DTN Management Architecture: Request for working group last call to be handled on the mailing list.
COSE Security Context: The document is in working group last call; provide any feedback via the mailing list.
Bundle Protocol YANG Model: The chairs will post to the mailing list the request for adoption. Also provide links to BP EDM and MIB for previous versions of BP.
BP over Ethernet: Consider capturing current best practice into an informational document. Begin document on separating the bpv6 and bpv7 processing with focus on BPOE as a request for Ethernet ether type.
Applications over BP: Develop a generic informational document on application considerations for BP and keep individual drafts for HTTP and SMTP as personal drafts for now.
IPN URI Allocator Allocation: The ISG will be contacted about existing registry delegation processes. Working group members to suggest text for the designated expert description.

Next Steps

Continue discussion on IPN URI Scheme and other topics on the mailing list.
Prepare for working group last calls for DTN Management Architecture and COSE Security Context.
Pursue work on informational document for applications over BP.
Request working group adoption of Mark Lache's bundle protocol YANG Model
Continue work on BP over Ethernet
Address concerns and refine the allocator allocation process for IPN URIs.