[  143.378981][  T611] secure_seq: tcpv6 isn: 690655410
[  152.216995][  T688] secure_seq: tcp isn: 1687670795
[  153.700889][  T688] secure_seq: tcp isn: 3131619731
[  154.319865][  T688] packetdrill (688) used greatest stack depth: 23912 bytes left
[  158.859341][  T721] secure_seq: tcpv6 isn: 2985455674