[ 1656.701521][T15859] gre: GRE over IPv4 demultiplexer driver
[ 1657.158435][T15882] ip_gre: GRE over IPv4 tunneling driver
[ 1672.517356][T16453] ip6_gre: GRE over IPv6 tunneling driver
[ 1679.806329][T16796] ping (16796) used greatest stack depth: 22912 bytes left
[ 1682.621928][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1684.605901][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1686.462896][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1688.446898][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!