[ 3275.252070][T23669] gre: GRE over IPv4 demultiplexer driver
[ 3276.940085][T23692] ip_gre: GRE over IPv4 tunneling driver
[ 3326.035736][T24264] ip6_gre: GRE over IPv6 tunneling driver
[ 3354.452414][T24615] ping (24615) used greatest stack depth: 23648 bytes left
[ 3359.567685][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3364.622567][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3368.783598][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3373.647562][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!