[ 3172.354608][T28989] gre: GRE over IPv4 demultiplexor driver
[ 3173.550811][T29012] ip_gre: GRE over IPv4 tunneling driver
[ 3209.123102][T29585] ip6_gre: GRE over IPv6 tunneling driver
[ 3223.550142][T29834] ping (29834) used greatest stack depth: 23296 bytes left
[ 3232.937254][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3236.776119][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3240.233097][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3243.880118][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!