[ 4671.454224][T24379] gre: GRE over IPv4 demultiplexor driver
[ 4673.978122][T24409] ip_gre: GRE over IPv4 tunneling driver
[ 4703.276396][T24663] ping (24663) used greatest stack depth: 23632 bytes left
[ 4740.554185][T24982] ip6_gre: GRE over IPv6 tunneling driver
[ 4770.121068][T25239] ping (25239) used greatest stack depth: 23600 bytes left
[ 4787.062486][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4793.397449][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4799.093419][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4805.429518][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!