[ 3967.201972][T20153] gre: GRE over IPv4 demultiplexor driver [ 3969.453058][T20176] ip_gre: GRE over IPv4 tunneling driver [ 4032.020783][T20752] ip6_gre: GRE over IPv6 tunneling driver [ 4059.085506][T21001] ping (21001) used greatest stack depth: 23360 bytes left [ 4075.195891][ C3] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 4081.019830][ C0] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 4086.074809][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 4092.154842][ C2] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 4245.722513][T22707] ping (22707) used greatest stack depth: 23072 bytes left