[ 3194.881867][T28980] gre: GRE over IPv4 demultiplexor driver
[ 3196.010521][T29003] ip_gre: GRE over IPv4 tunneling driver
[ 3231.381123][T29576] ip6_gre: GRE over IPv6 tunneling driver
[ 3238.494671][T26237] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 3251.208803][T29920] ping (29920) used greatest stack depth: 23360 bytes left
[ 3255.388343][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3259.036348][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3262.236369][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 3265.884346][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!