[ 4400.145964][T26066] gre: GRE over IPv4 demultiplexor driver
[ 4402.091119][T26089] ip_gre: GRE over IPv4 tunneling driver
[ 4461.131582][T26660] ip6_gre: GRE over IPv6 tunneling driver
[ 4487.634499][T26909] ping (26909) used greatest stack depth: 23360 bytes left
[ 4502.710467][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4507.435040][T27098] ping (27098) used greatest stack depth: 22752 bytes left
[ 4508.405397][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4513.205388][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4518.837397][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!