OSPFv3 help

Hello I'm trying to setup a simple lab test for OSPFv3 with bird. The configuration is as follows: eth1 eth0 eth0 eth1 <net 1>-------|router 1|------------|router 2|------<net 2> Both routers have on eth0 an fe80 (link-local) address but also an fd77/16 address. The configuration works but the routers export their link-local address as the gateway for their respective networks. For example: bird> show route fd77:a:b:c::/80 via fe80::21e:67ff:fe7b:31c9 on eth1 How do I override this behavior and export the fd77 address as the gateway address? Thanks, Andre