[ 4452.688158][T25969] gre: GRE over IPv4 demultiplexor driver [ 4454.807808][T25993] ip_gre: GRE over IPv4 tunneling driver [ 4515.137248][T26571] ip6_gre: GRE over IPv6 tunneling driver [ 4541.696011][T26820] ping (26820) used greatest stack depth: 23648 bytes left [ 4557.192634][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 4563.016567][ C2] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 4567.944621][ C3] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 4573.832554][ C0] ip6_tunnel: tep0 xmit: Local address not yet configured!