[ 4515.370845][T25790] gre: GRE over IPv4 demultiplexor driver
[ 4517.404458][T25814] ip_gre: GRE over IPv4 tunneling driver
[ 4538.923154][T26016] ping (26016) used greatest stack depth: 23512 bytes left
[ 4578.460100][T26386] ip6_gre: GRE over IPv6 tunneling driver
[ 4620.657430][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4626.545341][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4631.665384][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4637.617344][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!