How to configure FRR OSPF so that the route is advertised by the OSPF daemon but not added in the linux routing table?

[davik]

`
ip route 1.1.1.1/32 ens33
ip route 1.1.1.2/32 ens33

!
interface ens33
ip ospf 1 area 0 192.168.84.191
!
router ospf 1
ospf router-id 192.168.84.191
redistribute static metric 10000 route-map RM-ens33
!
access-list AC-ens33 seq 1 permit 1.1.1.1/32
access-list AC-ens33 seq 2 permit 1.1.1.2/32
!
route-map RM-ens33 permit 10
match ip address AC-ens33
`

This is an example configuration which we use normally to advertise the routes 1.1.1.1/32. The problem with this configuration is that it adds an entry in linux routing table where the frr/ospf daemon is running along with advertising the route to OSPF peers. We don't want frr service to add the static route to the linux routing table and just advertise it. Can anyone help?

[donaldsharp]

Please look at http://docs.frrouting.org/en/latest/zebra.html#zebra-route-filtering

[davik]

We are still unable to achieve it.
What we understand so far from the config is that -
ip route 1.1.1.1/32 ens33 this line tells frr to add a static route, adding a static route adds the route to the linux routing table.

redistribute static metric 10000 route-map RM-ens33 this line tells the OSPF router to publish all the static routes that match the conditions stated in the RM-ens33 route map.

We tried to add the static route by the following configuration (add it to the Table 30)
ip route 1.1.1.1/32 ens33 table 30
and in the OSPF router config we asked to publish the routes added to the Table 30,
redistribute table 30 metric 10000 route-map RM-ens33
By doing this our motivation was to publish the route via OSPF without adding the route to the linux routing table.
But this also is not working. Is my understanding correct up to some extent?

How to tell Zebra not to add the route in the linux routing table, but tell OSPF to publish it?

[ton31337]

As @donaldsharp mentioned, did you take a look at ip protocol PROTOCOL route-map ROUTEMAP. http://docs.frrouting.org/en/latest/zebra.html#clicmd-ip-protocol-PROTOCOL-route-map-ROUTEMAP

[HSXX]

i have the same question

[dbeken85]

Same here, actually is there a way to publish routes in OSPF which are stored in specific routing tables? Do I need VRF?