[ 1300.814234][T17952] gre: GRE over IPv4 demultiplexer driver
[ 1301.321393][T17975] ip_gre: GRE over IPv4 tunneling driver
[ 1306.883262][T18227] ping (18227) used greatest stack depth: 23888 bytes left
[ 1317.412830][T18546] ip6_gre: GRE over IPv6 tunneling driver
[ 1321.934649][T18745] ping (18745) used greatest stack depth: 23072 bytes left
[ 1327.923005][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1329.905953][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1331.761962][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1333.810945][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!