[ 3181.962886][T27832] gre: GRE over IPv4 demultiplexor driver
[ 3183.131235][T27855] ip_gre: GRE over IPv4 tunneling driver
[ 3219.318714][T28427] ip6_gre: GRE over IPv6 tunneling driver
[ 3234.331349][T28677] ping (28677) used greatest stack depth: 23632 bytes left
[ 3244.153639][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3247.993523][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3251.321542][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3255.097527][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!