[ 1398.764947][T31137] gre: GRE over IPv4 demultiplexer driver
[ 1399.181522][T31160] ip_gre: GRE over IPv4 tunneling driver
[ 1414.418153][T31738] ip6_gre: GRE over IPv6 tunneling driver
[ 1419.677042][T31987] ping (31987) used greatest stack depth: 22912 bytes left
[ 1424.407351][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1426.391317][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1428.182316][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1430.167325][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!