>>> i6=IPv6(src='fd00:141:27:1::10', dst='fd00:141:64:1::10')
>>> i4=IP(src='141.27.1.10', dst='141.64.1.16')
>>> q=ICMP()
>>> q.type=8 ## v4 Echo Request
>>> q
<ICMP  type=echo-request |>
>>> p=i6/i4/q
>>> p[IPv6].nh=4 ## IP in IP (encapsulation) !setzt Scapy nicht automatisch!

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Generic Packet Tunneling in IPv6 - rfc2473