Junos, accidentally deleted a FIB entry, how to re-add?

Question

while i was testing Junos in a virtual environment, i accidentally deleted an entry in the forwarding base (do not clearly remember which command i used to let that happen), but because of this the device did not want to install the route (ospf) anymore in the fib, also not when i tried with a static route, it was still showing in the RIB btw.

What can i do in the future to readd a route to the fib, incase I or someone else accidentally deletes route(s) from the forwarding base?

tia!

---

update:

so i was able to find the command which made me delete an entry in the fib, it was the clear-route forwarding table "network/mask" "next-hop" command. Does anyone know how to re-add routes incase something like this happens? (my motive for running this command was so i could refresh that route)

shut/noshut and/or adding a static route for the same dest. network and next-hop did not do the trick.

root# run show route

inet.0: 4 destinations, 4 routes (4 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

1.1.1.0/24         *[OSPF/10] 00:00:11, metric 2
                    > to 2.2.2.1 via ge-0/0/0.0


root# run show route forwarding-table
Routing table: default.inet
Internet:
Destination        Type RtRef Next hop           Type Index    NhRef Netif
default            perm     0                    rjct       36     1
0.0.0.0/32         perm     0                    dscd       34     1
1.1.1.0/24         user     0 2.2.2.1            ucst      557     3 ge-0/0/0.0



========= command - root# run clear route forwarding-table 1.1.1.0/24 2.2.2.1

==== after

root# run show route

inet.0: 4 destinations, 4 routes (4 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

1.1.1.0/24         *[OSPF/10] 00:07:30, metric 2
                    > to 2.2.2.1 via ge-0/0/0.0

root# run show route forwarding-table
Routing table: default.inet
Internet:
Destination        Type RtRef Next hop           Type Index    NhRef Netif
default            perm     0                    rjct       36     1
0.0.0.0/32         perm     0                    dscd       34     1
2.2.2.0/24         intf     0                    rslv      554     1 ge-0/0/0.0

Answer 1

If you use clear ospf database, OSPF will flush the LSDB (and RIB) and re-learn the link-state database from it's neighbours. This will in turn re-install the route in the forwarding table.

Just be aware that there is no way to flush only the affected route from the table, so you there will be a brief interruption depending on how big your OSPF domain is.