[ 1665.335299][T26948] gre: GRE over IPv4 demultiplexer driver
[ 1665.777517][T26971] ip_gre: GRE over IPv4 tunneling driver
[ 1681.971019][T27555] ip6_gre: GRE over IPv6 tunneling driver
[ 1689.623109][T27898] ping (27898) used greatest stack depth: 22432 bytes left
[ 1692.515217][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1694.563174][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1696.419169][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1698.467173][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!