[ 1530.575670][T26196] gre: GRE over IPv4 demultiplexer driver
[ 1531.066564][T26219] ip_gre: GRE over IPv4 tunneling driver
[ 1547.986915][T26799] ip6_gre: GRE over IPv6 tunneling driver
[ 1559.111416][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1561.223388][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1563.143387][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1565.255383][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1570.860085][T27617] ping (27617) used greatest stack depth: 22768 bytes left