[ 4407.128787][T26248] gre: GRE over IPv4 demultiplexor driver
[ 4409.121020][T26271] ip_gre: GRE over IPv4 tunneling driver
[ 4470.065739][T26845] ip6_gre: GRE over IPv6 tunneling driver
[ 4496.555450][T27099] ping (27099) used greatest stack depth: 23360 bytes left
[ 4512.181139][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4518.134024][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4523.125026][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4529.078013][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!