I have Summit x480 with connected subnet 172.30.0.0/16. But I'd like to advertise to OSPF process another subnets like 172.30.20.0/24, 172.30.21.0/24 and so forth.
I try to create routes via Null0 and export these to OSPF, but I find only "blackhole" routes.
Can I export blackhole routes to OSPF? Can anybody suggest me another way to advertise /24 subnets.