[ 4416.271949][T22437] gre: GRE over IPv4 demultiplexor driver
[ 4418.370099][T22460] ip_gre: GRE over IPv4 tunneling driver
[ 4478.598430][T23037] ip6_gre: GRE over IPv6 tunneling driver
[ 4504.875945][T23291] ping (23291) used greatest stack depth: 21384 bytes left
[ 4520.828477][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4526.716406][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4531.645400][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4537.596406][    C0] ip6_tunnel: tep0 xmit: Local address not yet configured!