Operator sequenced it: NetBox first, then dual-stack. Pinned with its known limit attached so the
next session cannot mistake internal v6 for working v6 -- IPv6 does not egress the lab (measured),
so the LAN leg proves addressing/RA/services-binding and nothing about internet GUA reachability.
The WAN v6 leg is DEFERRED: it would be a path to nowhere and untestable.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>