[ 1493.899350][T18243] gre: GRE over IPv4 demultiplexer driver
[ 1494.345545][T18266] ip_gre: GRE over IPv4 tunneling driver
[ 1509.525945][T18838] ip6_gre: GRE over IPv6 tunneling driver
[ 1513.780462][T19041] ping (19041) used greatest stack depth: 23952 bytes left
[ 1514.817447][T19091] ping (19091) used greatest stack depth: 23888 bytes left
[ 1514.949653][T23518] ip6_tunnel: tep1 xmit: Local address not yet configured!
[ 1519.542393][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1521.462401][    C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1523.253394][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1525.176181][    C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 1547.128538][T20315] ping (20315) used greatest stack depth: 23816 bytes left