[ 1637.617039][T31297] gre: GRE over IPv4 demultiplexer driver
[ 1638.042556][T31320] ip_gre: GRE over IPv4 tunneling driver
[ 1643.430255][T31572] ping (31572) used greatest stack depth: 23464 bytes left
[ 1653.596935][T31892] ip6_gre: GRE over IPv6 tunneling driver
[ 1657.922220][T32091] ping (32091) used greatest stack depth: 23040 bytes left
[ 1663.779179][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1665.763154][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1667.555149][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1669.538158][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!