[ 4368.443128][T20229] gre: GRE over IPv4 demultiplexor driver
[ 4370.476510][T20253] ip_gre: GRE over IPv4 tunneling driver
[ 4431.108087][T20824] ip6_gre: GRE over IPv6 tunneling driver
[ 4457.547480][T21087] ping (21087) used greatest stack depth: 21808 bytes left
[ 4474.124528][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4480.717366][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4486.732335][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4492.684327][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!