[ 3375.591461][T22466] gre: GRE over IPv4 demultiplexor driver
[ 3376.767849][T22489] ip_gre: GRE over IPv4 tunneling driver
[ 3412.369987][T23060] ip6_gre: GRE over IPv6 tunneling driver
[ 3424.267903][T23259] ping (23259) used greatest stack depth: 22976 bytes left
[ 3436.893168][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3440.606116][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3443.934101][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3447.837100][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3499.043810][T24444] ping (24444) used greatest stack depth: 22176 bytes left