[ 1543.764274][T11658] gre: GRE over IPv4 demultiplexer driver
[ 1544.194052][T11681] ip_gre: GRE over IPv4 tunneling driver
[ 1559.704901][T12254] ip6_gre: GRE over IPv6 tunneling driver
[ 1567.088091][T12598] ping (12598) used greatest stack depth: 23320 bytes left
[ 1569.957217][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1571.941181][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1573.797184][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1575.780187][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!