[ 4172.160323][T29283] gre: GRE over IPv4 demultiplexer driver
[ 4173.770097][T29306] ip_gre: GRE over IPv4 tunneling driver
[ 4194.129292][T29558] ping (29558) used greatest stack depth: 23504 bytes left
[ 4221.623880][T29878] ip6_gre: GRE over IPv6 tunneling driver
[ 4242.086813][T30127] ping (30127) used greatest stack depth: 23440 bytes left
[ 4254.593683][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4259.457607][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4263.617626][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4268.546614][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4338.716093][T31265] ping (31265) used greatest stack depth: 22008 bytes left