[   67.508839][  T390] secure_seq: tcpv6 isn: 2017043771
[  115.705468][  T470] secure_seq: tcp isn: 4245148357
[  123.568892][  T502] secure_seq: tcpv6 isn: 1490877299
[  126.644967][  T502] packetdrill (502) used greatest stack depth: 24168 bytes left