[ 1680.687826][T13578] gre: GRE over IPv4 demultiplexer driver
[ 1681.113419][T13601] ip_gre: GRE over IPv4 tunneling driver
[ 1696.675054][T14173] ip6_gre: GRE over IPv6 tunneling driver
[ 1702.111309][T14422] ping (14422) used greatest stack depth: 23320 bytes left
[ 1703.007230][T14466] ping (14466) used greatest stack depth: 22816 bytes left
[ 1706.897272][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1708.881237][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1710.737236][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1712.784280][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!