Markdown Version | Session Recording

Session Date/Time: 10 Nov 2023 14:30

sidrops

Summary

The SIDROPS meeting covered updates on the 8210-bis document, a design analysis of the RPKI prefix list, and a discussion on ROA management. Key concerns were raised about ROA management in dynamic network environments.

Key Discussion Points

• 8210-bis Update: The document was returned to the working group due to references to ASPA. The plan is to finalize ASPA, update 8210-bis accordingly, and then initiate another last call.
• RPKI Prefix List Design Analysis: A presentation covered the design and operational considerations of the RPKI prefix list object.
  • The intention is to identify invalid routes based on prefixes not included in the list published by the originating AS.
  • The draft does not clearly state whether more specific prefixes of an included prefix are allowed or disallowed.
  • The prefix list aims to mitigate AS abuse, route leaks, and reduce the hijacked attack surface.
  • Operational considerations include prefix splitting and BYOIP customer scenarios.
  • Discussion on whether the draft should specify that more specific prefixes of an included prefix are considered invalid. A one-to-one mapping between BGP prefixes and enumerated prefixes in the list was favored, mirroring 779 inspired prefix notation.
  • The meeting also debated the utility of a "not found" state in prefix list verification.
• ROA Management: A presentation detailed concerns about ROA management, particularly in dynamic networks.
  • The presenters argued that the current ROA management model struggles with route planning, business changes, and resource allocation.
  • Proposed solutions included finer-grained ROA management at the prefix level, on-demand updates, and bitmap-based encoding.
  • Concerns were raised about the scalability of single-prefix ROAs.
  • Existing mechanisms of ROA management was discussed, as it was argued by some that the operational issues presented were resolvable by following correct procedures.
  • Discussion ensued over the benefits and drawbacks of using bitmap-based encoding compared to existing encoding mechanisms.

Decisions and Action Items

• 8210-bis: Update the document after ASPA is finalized and initiate another last call.
• RPKI Prefix List: The working group will consider a separate draft focusing on the solution space, usage recommendations, and operational aspects of the prefix list.
• ROA Management: Discuss examples where the bitmap-based encoding could be useful and also discuss the current mechanisms. The discussion to be had with the presenters.

Next Steps

• Continue discussions on ASR and related topics on the mailing list.
• Explore example implementations of prefix list objects and ROA management using existing mechanisms.
• Consider potential use cases for bitmap based encoding.