problem configuring ptmp

[Maria P]

Hi Everyone,

I try to get a mixed network of linux and Mikrotik running, useing ptmp 
interfaces.
It worked with quagga, but I wanna switch due to software instabilities.
At least with Mikrotik & quagga I understand that a ptmp area means 
Hellos are propagated by multicasts to 224.0.0.5, the neighbors form ptp 
relations with each other after they have found themselfs.

with my configuration, Bird doesn't send out multicasts, evenso its 
logging "ospf1: HELLO packet sent via eth0"

what am I doing wrong ?

Thanks Maria

my config
----

log syslog all;

router id 172.20.2.33;

debug protocols all;

protocol direct {
        interface "*";  # Restrict network interfaces it works with
}

protocol kernel {
        persist;                # Don't remove routes on bird shutdown
        scan time 20;           # Scan kernel routin
        export all;             # Default is export none
}

protocol device {
        scan time 10;           # Scan interfaces every 10 seconds
}

protocol static {

        import all;
        export all;
}

protocol ospf {
        import all;
        export all;

        area 0.0.0.0 {
                stub no;

               networks {192.168.23.0/24;};

                interface "eth0" {
                priority  1;
                type ptmp;
                authentication simple;
                password "***deleted***";
                cost 2;


                };
  };

}