[ 3229.396287][T27752] gre: GRE over IPv4 demultiplexor driver
[ 3230.581917][T27775] ip_gre: GRE over IPv4 tunneling driver
[ 3266.613951][T28349] ip6_gre: GRE over IPv6 tunneling driver
[ 3284.779814][T11963] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 3287.388758][T28699] ping (28699) used greatest stack depth: 23296 bytes left
[ 3292.139430][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3295.851440][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3299.115423][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3302.890446][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!