[ 4555.260839][T28706] gre: GRE over IPv4 demultiplexer driver
[ 4556.981161][T28729] ip_gre: GRE over IPv4 tunneling driver
[ 4606.985962][T29309] ip6_gre: GRE over IPv6 tunneling driver
[ 4641.448775][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4646.504704][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4650.792671][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4655.784676][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 4727.998571][T30688] ping (30688) used greatest stack depth: 22880 bytes left