Osopf 2 zones on one interface?

Question

Computer networks

ospf without broadcast
A lot of routers are connected to two servers, their server is registered as a neighbor and each sends its own network.
Now ~ 402 networks, after 350, it slowly starts adding new ones and sometimes some networks (about 15) flies.
I want to split it into zones, but I can’t understand whether it’s possible to have two zones for one interface. Tried but something went wrong.

node2 ~]$ cat /etc/bird.conf
router id 255.255.255.255;

log syslog all;

protocol device {
        scan time 10;
}

protocol kernel {
        export all;
        scan time 15;
}

protocol ospf my {
        import all;
        export all;
        area 0 {
                interface "br1", "tap*" {
                        priority 255;
                        type nonbroadcast;
                        strict nonbroadcast no;
                        hello 20; retransmit 20; wait 50; dead 50;
                        authentication none;
                        neighbors {
                            172.17.11.1 eligible;
                        };
                };
        };
}

Answer 1

And how do you imagine the logic of such a network? The same network in different areas? Of course it won't work that way. Make a second interface (although the scheme looks extremely muddy)