**Session Date/Time:** 16 Apr 2026 13:00

# [SNAC](../wg/snac.html)

## Summary
The SNAC working group held an interim meeting to resolve outstanding issues on [draft-ietf-snac-simple](https://datatracker.ietf.org/doc/draft-ietf-snac-simple/) and prepare for Working Group Last Call (WGLC). The primary focus was on the status of state machines, various pull requests regarding prefixes and DNS, and establishing a timeline for publication.

## Key Discussion Points

### State Machine Status
*   **Ted Lemon** raised concerns about the complexity of making state machines normative, citing past IETF experience (e.g., DHCP) where contradictions between text and diagrams caused interoperability issues.
*   **Consensus:** The state machines will be moved to an informative appendix. The normative text in the main body of the document remains the authoritative specification.
*   **Éric Vyncke** and **Jonathan Hui** supported this approach to simplify the path to WGLC.
*   **Ted Lemon** and **Esko Dijk** will coordinate to move the existing state machine descriptions from the main text to the appendix and ensure the normative text is sufficiently descriptive.

### Technical Pull Requests (PRs) and Issues
*   **ULA Link Prefixes (PR regarding stability):** **Esko Dijk** discussed maintaining stable ULA link prefixes across reboots. **Éric Vyncke** advised providing guidance on "SHOULD" exceptions or using "MUST" to satisfy IESG requirements. **Ted Lemon** suggested reviewing RFC 9724 and RFC 9727 for potential references regarding address anonymization.
*   **NAT64 and DNS64:** The group discussed whether the SNAC router should provide DNS64 synthesis. **Ted Lemon** noted that most modern devices (and even IoT devices) are capable of local synthesis. **Consensus:** Remove references to DNS64; rely on NAT64 and PREF64 for local synthesis by end devices.
*   **Multiple AIL Interfaces:** The group reaffirmed that support for multiple AIL (Adjacent Infrastructure Link) interfaces is out of scope for the "Simple" document and belongs in "SNAC Complex" or future work.
*   **DNS Service Discovery and Domain Names:** **Ted Lemon** addressed the domain to be used by the discovery proxy. He cautioned against using unallocated domains like `.lan`. 
    *   **Decision:** The group agreed to use `default.service.arpa` (or subdomains thereof) for discovery queries to avoid collisions and unmanaged domain usage.
*   **Secure DNS (DoT/DoH):** **Esko Dijk** raised the issue of secure querying from the stub network. **Ted Lemon** and **Éric Vyncke** agreed not to "boil the ocean" regarding upstream DNS security beyond what is already standard, noting that true anonymity requires host-based solutions (e.g., DEPRIVE) which are out of scope.
*   **DHCP Significant Change (RFC 8415bis):** **Esko Dijk** noted that some DHCP requirements are "SHOULD" level. **Ted Lemon** argued against "fixing" other specifications (like RFC 8415bis) within this document. The document will continue to reference existing standards.
*   **Startup Randomization:** **Esko Dijk** pointed out that power outage scenarios could cause synchronized RA (Router Advertisement) broadcasts. **Ted Lemon** suggested that because SNAC routers might be deployed in high density (e.g., multiple smart speakers), it may be worth being more specific than RFC 4861 regarding timing to improve scalability.

### Authorship
*   **David Lou** proposed adding **Esko Dijk** to the author list of `draft-ietf-snac-simple` in recognition of his significant contributions. The proposal was unanimously supported by those present (**Ted Lemon**, **Darren Dukes**, **Éric Vyncke**, and **Jonathan Hui**).

## Decisions and Action Items
*   **Decision:** State machines are informative and will be placed in an appendix.
*   **Decision:** Remove DNS64 synthesis requirements; keep NAT64.
*   **Decision:** Use `default.service.arpa` for the discovery proxy domain.
*   **Decision:** **Esko Dijk** is added as a co-author of the "Simple" draft.
*   **Action Item:** **Ted Lemon** to spend time over the coming days updating the draft based on the PR discussions and state machine relocation.
*   **Action Item:** **Esko Dijk** to review RFC 9724 and RFC 9727 to see if they can be constructively referenced regarding prefix stability.

## Next Steps
*   **Draft Publication:** An updated version of `draft-ietf-snac-simple` is expected to be published by Monday.
*   **WGLC:** **Jonathan Hui** intends to initiate a Working Group Last Call on Monday, following the publication of the updated draft.
*   **Next Meeting:** Another interim meeting is scheduled for two weeks from today to address any feedback arising during the WGLC.