[ 2669.300331][T17473] gre: GRE over IPv4 demultiplexor driver
[ 2671.066190][T17496] ip_gre: GRE over IPv4 tunneling driver
[ 2723.297027][T18070] ip6_gre: GRE over IPv6 tunneling driver
[ 2750.190142][T18364] ping (18364) used greatest stack depth: 22368 bytes left
[ 2760.015101][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 2765.262993][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 2769.678975][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 2774.799027][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!