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If you had previously assigned a static IP to the container using /etc/lxc/dnsmasq.conf make sure to remove the entry (I believe you also need to restart the host).
One interesting limitation I encountered is that containers cannot resolve to the Additional Public IP. Not sure why and looking into fixing this.
macvlan mac address
The first thing to do is to create a mac address for the macvlan interface to be created on the host.
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