[ 3367.710300][T23679] gre: GRE over IPv4 demultiplexer driver
[ 3369.310011][T23702] ip_gre: GRE over IPv4 tunneling driver
[ 3417.455140][T24275] ip6_gre: GRE over IPv6 tunneling driver
[ 3438.104563][T24524] ping (24524) used greatest stack depth: 23648 bytes left
[ 3450.780010][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3455.707940][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3459.931959][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3465.114970][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!