Hello, So I am going to stick to the working solution by using /30 links between routers and then setting a lower metric for R3 -> R4, and R4 -> R2 which has the same effect as what I wanted to achieve. (Only disadvantage that it's more work to setup and maintain)
Thank you! 2015-09-20 13:39 GMT+02:00 Ondrej Zajicek <santi...@crfreenet.org>: > On Sat, Sep 19, 2015 at 09:09:54PM +0200, LU wrote: > > Hi, > > > > I have 4 routers connected like this. > > > > (10.4.4.1/24) (10.4.4.4.2/24) > > R1 R2 > > \ / > > \ / > > SWITCH > > / \ > > / \ > > R3 R4 > > (10.4.4.3/24) (10.4.4.4/24) > > > > > > I export a default route (0.0.0.0/0) from R1 and R2 with an > ospf_metric1 = > > 100.. > > > > At R3, in an import filter I set the ospf_metric1 of R1's default route > to > > 10. > > > > At R4, in an import filter I set the ospf_metric1 of R2's default route > to > > 10. > > > > What I expect is that R3's routing table is going to contain 0.0.0.0/0 > via > > R1. > > and likewise R4's routing table is going to contain 0.0.0.0/0 via R2. > > > > Unfortunately it doesn't happen and both R3's and R4's routing table has > > 0.0.0.0/0 via R2. > > Hi > > Unfortunately that is not how import from OSPF works in BIRD. The route > is first selected inside OSPF (from possible OSPF paths) and then > imported to the main table (where it is compared to routes from other > protocols). Therefore setting ospf_metric1 in import filters have > no relevance (unless you have multiple OSPF instances and compare > routes from them in the main table). > > Note that being able to import all possible OSPF routes to the main table > would be a nice feature, but it is not currently implemented. > > -- > Elen sila lumenn' omentielvo > > Ondrej 'Santiago' Zajicek (email: santi...@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." >
