Ok, i'm solving with move iptables rules to persistent/outside from /etc/network/interfaces by using iptables-persistent/iptables-save
So if want to change/create new port forwarding, i define rules within iptables, not by editing /etc/network/interfaces. No need to restart/take down bridge...
Thank you.
What/where is the best practices to apply iptables/port forwarding like this if not in /etc/network/interfaces (to prevent taking down host bridge)?
auto vmbr1
iface vmbr1 inet static
address 10.0.0.1
netmask 255.255.255.0
bridge_ports none...
Before take down bridge interface from Host:
root@localcloud:~# brctl show
bridge name bridge id STP enabled interfaces
vmbr0 8000.0cc47ae144d0 no eth0
veth100i1
vmbr1...
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