[ 3199.662125][T23677] gre: GRE over IPv4 demultiplexer driver
[ 3201.281898][T23700] ip_gre: GRE over IPv4 tunneling driver
[ 3250.171211][T24272] ip6_gre: GRE over IPv6 tunneling driver
[ 3270.892375][T24522] ping (24522) used greatest stack depth: 23648 bytes left
[ 3274.339998][T24566] ping (24566) used greatest stack depth: 23344 bytes left
[ 3283.658910][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3288.842829][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3293.065876][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3297.994809][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!