After reading FAQs I thought It could be related to this site (ServerFault) but got downvoted and put on hold.

Because it's R&D, it falls out of the "production system" requirement. But it's a problem I ran across for my job, using solely existing building blocks (iproute2 & linux 3.10).

My question is (was): Macvlan based interface pings from host but not from namespace