[ 1660.564167][T30838] gre: GRE over IPv4 demultiplexer driver
[ 1661.034556][T30861] ip_gre: GRE over IPv4 tunneling driver
[ 1676.708058][T31441] ip6_gre: GRE over IPv6 tunneling driver
[ 1683.153436][T31735] ping (31735) used greatest stack depth: 23040 bytes left
[ 1687.113895][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1689.097862][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1691.016853][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1693.065860][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!