Использование бриджа между внутренними ethernet портами

ставим debian 12
nano /etc/apt/sources.list

    8  apt install mc 
    9  apt install network-manager
    
    

Подготовка

в файл /etc/sysctl.d/99-sysctl.conf
дописываем

net.bridge.bridge-nf-call-iptables = 0
net.bridge.bridge-nf-call-arptables = 1

Вариант настройки через etc/network
 apt install net-tools


iface enp2s0 inet manual
iface enp1s0 inet manual
iface enp3s0 inet manual
iface enp4s0 inet manual

auto enp1s0.2
iface enp2s0.2 inet manual

auto enp1s0.4
iface enp1s0.4 inet static
        address 192.168.12.5
        netmask 255.255.255.0
        gateway 192.168.12.1
        dns-nameservers 192.168.12.1
#       vlan_raw_device enp1s0
<code>
auto enp1s0.3
iface enp1s0.3 inet static
        address 192.168.18.5
        netmask 255.255.255.0
        gateway 192.168.18.1
        dns-nameservers 192.168.18.1
#       vlan_raw_device enp1s0

auto br0
iface br0 inet static
        address 192.168.11.5
        netmask 255.255.255.0
        gateway 192.168.11.1
        dns-nameservers 192.168.11.1
#        pre-up ip route delele default
#        post-up ip route add default via 192.168.11.1 dev br0 metric 10
        pre-up route delete default
        post-up route add default gw  192.168.11.1 dev br0  metric 10
        post-up route add default gw  192.168.18.1 dev enp1s0.3 metric 100
bridge_ports enp1s0.2 enp2s0 enp3s0 enp4s0
</code>