Bird and PvP connections

[y-alexey]

In 18.06 Wireguard connections make by default interface with equal IP addresses on both sides and /32 mask. Some other VPN connections make the same.

Bird4 can't to create bgp routes over this interface. Not matter if any static routes point to other side of tunnel, or to interface directly.

I can solve this by set interface mask option 255.255.255.0 manually in /etc/config/network.

Is this problem of bird, or problem of interface configuration mechanism? Is the standard require non /32 mask of interface for dynamic routing work, or this is bird4 specific?

In 19.07 wireguard interface properties fixed and interface mask corresponding to CIDR from configuration.