[   98.345564][  T506] secure_seq: tcpv6 isn: 1879633922
[  108.669028][  T582] secure_seq: tcp isn: 4031566666
[  117.026735][  T614] secure_seq: tcpv6 isn: 356666230
[  120.112469][  T614] packetdrill (614) used greatest stack depth: 24032 bytes left