[ 1404.523360][T31213] gre: GRE over IPv4 demultiplexer driver
[ 1404.959162][T31236] ip_gre: GRE over IPv4 tunneling driver
[ 1412.204388][T31582] ping (31582) used greatest stack depth: 23680 bytes left
[ 1420.327614][T31807] ip6_gre: GRE over IPv6 tunneling driver
[ 1430.339841][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1432.323814][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1434.115816][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1436.098832][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!