[ 1495.098183][T26534] gre: GRE over IPv4 demultiplexer driver
[ 1495.525205][T26557] ip_gre: GRE over IPv4 tunneling driver
[ 1510.661241][T27128] ip6_gre: GRE over IPv6 tunneling driver
[ 1514.074248][T24795] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 1515.855273][T27377] ping (27377) used greatest stack depth: 23344 bytes left
[ 1520.570182][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1522.490183][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1524.282187][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1526.266187][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!