[ 3917.279648][T20161] gre: GRE over IPv4 demultiplexor driver
[ 3919.211364][T20185] ip_gre: GRE over IPv4 tunneling driver
[ 3945.434446][T20437] ping (20437) used greatest stack depth: 22944 bytes left
[ 3979.133375][T20760] ip6_gre: GRE over IPv6 tunneling driver
[ 4021.823581][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4027.583506][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4032.575518][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4038.399525][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!