Markdown Version | Session Recording

Session Date/Time: 29 Mar 2023 00:30

6man

Summary

The 6man meeting covered several important topics, including updates on existing drafts, discussions on new proposals, and announcements regarding related work. Key discussions revolved around the V-ID option, stateless address autoconfiguration, limiting extension headers, hop-by-hop processing, and generalized IPv6 tunnels. There were also lively debates on the complexity and practicality of proposed solutions.

Key Discussion Points

• V-ID Option:
  • Clarification on the relationship between V-ID and network slicing was sought.
  • The intended use cases and drivers were discussed, distinguishing between operational markers and application needs.
  • The performance impact of adding additional headers was raised, with a request for statistics.
• Improving the Robustness of Stateless Address Autoconfiguration:
  • Concerns were raised regarding the complexity of the active avoidance algorithm and its impact on existing implementations.
  • The need to balance the complexity of multi-prefix/multi-router scenarios with simpler single-router cases was highlighted.
  • The impact of packet loss on mobile devices and the lifetimes for prefixes were also questioned.
• Limiting Extension Headers:
  • The need for a routing area review was noted.
  • The default number of non-padding options, padding options, and the IPv6 header chain length were discussed.
  • Empirical data on the real-world behavior of devices when large extension headers are used was suggested.
• Hop-by-Hop Processing Procedures:
  • The importance of defining "full forwarding rate" and addressing potential reordering issues were discussed.
  • Considerations for the size of options and the number of hop-by-hop options were raised.
  • The use of terminology concerning nodes versus routers was discussed to make sure the proper devices were addressed.
• New Proposed DHCPv6 Options:
  • A new flag within router advertisements was proposed to allow DHCPv6 for prefix delegation to handle situations with multiple interfaces.
  • The DHCPv6 options allow scaling of IPv6 address space for VMs.
  • Concerns about legacy support were raised.
• Generalized IPv6 Tunnels:
  • A side meeting on generalized IPv6 tunnels (G-IPv6) was summarized.
  • Key questions discussed included the relationship between G-IPv6 and existing tunnels, extending existing IPv6 tunnels, and whether G-IPv6 is necessary for campus and data center networks.

Decisions and Action Items

• Stateless Address Autoconfiguration: Continue discussion on the mailing list due to time constraints.
• Limiting Extension Headers: Request a routing area review.
• Hop-by-Hop Processing Procedures: Revise the draft based on comments and then ask for a working group last call.
• New Proposed DHCPv6 Options Submit the draft to the DHCP working group

Next Steps

• Continue discussions on open issues via the mailing list.
• Incorporate feedback into revised drafts.
• Initiate working group last calls for applicable documents.