[ 1646.276493][ T5591] gre: GRE over IPv4 demultiplexer driver
[ 1646.713082][ T5614] ip_gre: GRE over IPv4 tunneling driver
[ 1662.184772][ T6186] ip6_gre: GRE over IPv6 tunneling driver
[ 1669.580014][ T6529] ping (6529) used greatest stack depth: 23320 bytes left
[ 1672.389126][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1674.372087][    C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1676.165075][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1678.149093][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!