[ 1500.982508][T29385] gre: GRE over IPv4 demultiplexer driver
[ 1501.428660][T29408] ip_gre: GRE over IPv4 tunneling driver
[ 1517.885671][T29990] ip6_gre: GRE over IPv6 tunneling driver
[ 1523.758694][T30239] ping (30239) used greatest stack depth: 23232 bytes left
[ 1524.857986][T27709] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 1528.737258][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1530.785246][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1532.704259][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1534.753253][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!