[ 1454.935466][T29314] gre: GRE over IPv4 demultiplexer driver
[ 1455.390781][T29337] ip_gre: GRE over IPv4 tunneling driver
[ 1463.328795][T29683] ping (29683) used greatest stack depth: 23424 bytes left
[ 1471.934477][T29908] ip6_gre: GRE over IPv6 tunneling driver
[ 1479.883932][T30255] ping (30255) used greatest stack depth: 23224 bytes left
[ 1482.802793][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1484.850761][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1486.769822][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1488.817752][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!