[ 3155.434670][T22576] gre: GRE over IPv4 demultiplexor driver
[ 3157.493992][T22600] ip_gre: GRE over IPv4 tunneling driver
[ 3216.430564][T23179] ip6_gre: GRE over IPv6 tunneling driver
[ 3236.600952][T23378] ping (23378) used greatest stack depth: 22400 bytes left
[ 3256.878554][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3262.574433][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3267.374458][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3273.262431][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!