[ 4648.282608][T25494] gre: GRE over IPv4 demultiplexor driver
[ 4650.544948][T25517] ip_gre: GRE over IPv4 tunneling driver
[ 4716.253277][T26089] ip6_gre: GRE over IPv6 tunneling driver
[ 4728.886926][T26195] ping (26195) used greatest stack depth: 23424 bytes left
[ 4762.168575][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4768.568488][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4773.817476][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4780.088498][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!