[ 4319.974328][T29266] gre: GRE over IPv4 demultiplexer driver
[ 4321.560542][T29289] ip_gre: GRE over IPv4 tunneling driver
[ 4369.379615][T29881] ip6_gre: GRE over IPv6 tunneling driver
[ 4390.236325][T16059] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 4402.140194][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4407.005200][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4411.164204][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4415.965188][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4485.335633][T31261] ping (31261) used greatest stack depth: 23568 bytes left