[ 3959.417592][T19966] gre: GRE over IPv4 demultiplexor driver [ 3961.461817][T19989] ip_gre: GRE over IPv4 tunneling driver [ 4023.361060][T20562] ip6_gre: GRE over IPv6 tunneling driver [ 4059.298912][T20906] ping (20906) used greatest stack depth: 21920 bytes left [ 4065.279888][ C2] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 4071.231842][ C3] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 4076.159859][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 4081.983821][ C2] ip6_tunnel: tep0 xmit: Local address not yet configured!