# running in scapy-2.3.2 shell on chronos
chronos="2a01:4f8:c17:2a61::2"
boreas="2001:1410:200:ee7::"
ping=IPv6(dst=boreas,src=chronos)/ICMPv6EchoRequest(data='A'*1452)
pong=sr1(ping)
ptbresponse=sr1(IPv6(dst=boreas,src=chronos)/ICMPv6PacketTooBig(mtu=1452)/bytes(pong)[0:1444],timeout=5)
sr1(ping,timeout=10)
Begin emission:
Finished to send 1 packets.
............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
Received 476 packets, got 0 answers, remaining 1 packets

# tcpdump on host "chronos"
19:53:09.653158 IP6 chronos > 2001:1410:200:ee7::: ICMP6, echo request, seq 0, length 1460
19:53:09.668681 IP6 2001:1410:200:ee7:: > chronos: ICMP6, echo reply, seq 0, length 1460
19:53:26.282904 IP6 chronos > 2001:1410:200:ee7::: ICMP6, packet too big, mtu 1452, length 1452
19:53:51.117112 IP6 chronos > 2001:1410:200:ee7::: ICMP6, packet too big, mtu 1452, length 1452
19:54:12.206479 IP6 chronos > 2001:1410:200:ee7::: ICMP6, packet too big, mtu 1452, length 1452
19:54:24.069219 IP6 chronos > 2001:1410:200:ee7::: ICMP6, echo request, seq 0, length 1460
19:54:24.084790 IP6 2001:1410:200:ee7:: > chronos: frag (0|1400) ICMP6, echo reply, seq 0, length 1400
19:54:24.084900 IP6 2001:1410:200:ee7:: > chronos: frag (1400|60)