Thanks Ondrej, that makes sense. Is there a way to add routes on the fly then, instead of putting them all in the config file? Or any other suggestion on how I could generate 50000 type-1 LSA. Regards Andre On 26/07/2019, 12:32, "Ondrej Zajicek" <santiago@crfreenet.org> wrote: On Fri, Jul 26, 2019 at 10:49:31AM +0200, Andre Cunha wrote: > Hello, > > Is there a limit on the number of stubnet prefixes that we can configure? I have configured 50000 stubnets but my router receives only 1084 routes. Hello Yes, stubnet prefixes are announced as a part of the Router-LSA, with 12 B per prefix. With 16bit Router-LSA length, the limit is about 5400 Router-LSA entries (including other entries than just stubnets). But note that having such large Router-LSA may cause many problems, including OSPF packet fragmentation, so i would generally suggest to not have larger Router-LSA than MTU, i.e. not more than ~100 entries. This length limit is not enforced in BIRD, if you configure more stubnets, the Router-LSA with length modulo 64k is generated, which may be invalid. I should add some check and warning there. External routers are announced as separate External-LSAs, so there is no such limit for them. -- Elen sila lumenn' omentielvo Ondrej 'Santiago' Zajicek (email: santiago@crfreenet.org) OpenPGP encrypted e-mails preferred (KeyID 0x11DEADC3, wwwkeys.pgp.net) "To err is human -- to blame it on a computer is even more so."