[ 4651.745247][T25574] gre: GRE over IPv4 demultiplexor driver
[ 4653.928466][T25597] ip_gre: GRE over IPv4 tunneling driver
[ 4719.136375][T26168] ip6_gre: GRE over IPv6 tunneling driver
[ 4747.538658][T26418] ping (26418) used greatest stack depth: 23296 bytes left
[ 4764.320374][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4770.656280][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4775.904286][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4782.688314][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!