[ 4456.690780][T26083] gre: GRE over IPv4 demultiplexor driver
[ 4458.763022][T26106] ip_gre: GRE over IPv4 tunneling driver
[ 4495.302261][T26453] ping (26453) used greatest stack depth: 22624 bytes left
[ 4520.100392][T26679] ip6_gre: GRE over IPv6 tunneling driver
[ 4562.577368][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4568.464309][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4573.392293][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4579.280317][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4799.348988][T29297] ping (29297) used greatest stack depth: 22352 bytes left