Captured on k8s-1 (cilium-dbg monitor, endpoint 1708): an IPv6 SYN from
edge-1 (fd02:30::/64) to fd99::8a reached the pod on 8082, but no reply
left via eth0; the pod has on-link and default IPv6 routes on net1 from
RAs. sbr only confines IPv4. Turn RA processing off on net1 with the
tuning plugin (as matter-server already uses it) and roll the pod.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>