[ 1354.316173][T10303] gre: GRE over IPv4 demultiplexor driver
[ 1356.530249][T10327] ip_gre: GRE over IPv4 tunneling driver
[ 1421.192031][T10902] ip6_gre: GRE over IPv6 tunneling driver
[ 1449.557942][T11151] ping (11151) used greatest stack depth: 23616 bytes left
[ 1466.032469][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1472.304414][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1477.552389][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1484.208455][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!