[ 1705.973292][T10549] gre: GRE over IPv4 demultiplexer driver
[ 1706.487430][T10572] ip_gre: GRE over IPv4 tunneling driver
[ 1722.982905][T11144] ip6_gre: GRE over IPv6 tunneling driver
[ 1728.993050][T11401] ping (11401) used greatest stack depth: 23176 bytes left
[ 1734.025647][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1736.074605][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1737.993615][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1740.041609][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!