UPDATE I was right after all in the first place. My network changed, but in another subnet, not mine. What happens is that lxc networking mode=macvlan stopped working or works intermittently. How do I know? because I started using mode=phys, thus moving the interface inside the container, and all problems went away. The Kernel or something started to drop the packets that were destined to the same subnet. There is no iptables here, and also I tested to rp_filter on and off, etc. No difference. Using tcpdump, I can see the icmp requests and responses traveling back and forth through the host, but never reaching their destination. So LXC networking mode macvilan is not working after the latest Ubuntu host updates.
On Wed, Nov 9, 2016 at 9:56 AM, Saint Michael <vene...@gmail.com> wrote: > I SOLVED > Many thanks to all. Using your input I concluded that the issue was not in > LXC or the Kernel. In fact. the colo changed the subnets without telling me. > Yours > Federico > > > >
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