host IP to LXC container

[Readbook1]

Hi!

I have several white IP getting from IPS.
Host setup:

root@pve:~# cat /etc/network/interfaces
auto lo
iface lo inet loopback
allow-hotplug enp0s31f6

auto vmbr0
iface vmbr0 inet dhcp
        bridge_ports enp0s31f6
        bridge_stp off
        bridge_fd 0

My host get's IP and several LXC contaner gets their IP via vmbr0 bridge.

How can I provide host IP to one LXC for network?
I'll try add this section to /etc/network/interfaces

auto vmbr1
iface vmbr1 inet static
        address  10.10.10.1
        netmask  255.255.255.0
        bridge_ports none
        bridge_stp off
        bridge_fd 0

        post-up echo 1 > /proc/sys/net/ipv4/ip_forward
        post-up   iptables -t nat -A POSTROUTING -s '10.10.10.0/24' -o vmbr0 -j MASQUERADE
        post-down iptables -t nat -D POSTROUTING -s '10.10.10.0/24' -o vmbr0 -j MASQUERADE

but after

systemctl restart networking

I lost ping to all existing LCX.
What I am doing wrong?

 

[Readbook1]

any adwice?