[ 4742.855180][T24783] gre: GRE over IPv4 demultiplexor driver
[ 4744.970254][T24806] ip_gre: GRE over IPv4 tunneling driver
[ 4809.077191][T25378] ip6_gre: GRE over IPv6 tunneling driver
[ 4838.206446][T25627] ping (25627) used greatest stack depth: 23328 bytes left
[ 4855.594639][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4861.867537][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4867.114537][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4873.386558][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!