[ 3967.201972][T20153] gre: GRE over IPv4 demultiplexor driver
[ 3969.453058][T20176] ip_gre: GRE over IPv4 tunneling driver
[ 4032.020783][T20752] ip6_gre: GRE over IPv6 tunneling driver
[ 4059.085506][T21001] ping (21001) used greatest stack depth: 23360 bytes left
[ 4075.195891][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4081.019830][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4086.074809][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4092.154842][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4245.722513][T22707] ping (22707) used greatest stack depth: 23072 bytes left