[ 568.578647][ T1911] gre: GRE over IPv4 demultiplexor driver [ 571.052243][ T1934] ip_gre: GRE over IPv4 tunneling driver [ 640.626065][ T2506] ip6_gre: GRE over IPv6 tunneling driver [ 672.268369][ T2756] ping (2756) used greatest stack depth: 23568 bytes left [ 689.650594][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 696.177505][ C2] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 701.746505][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 708.273507][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 970.791659][ T5219] ping (5219) used greatest stack depth: 23448 bytes left