OSPF Configuration on Nokia SR OS
Domain 5 - OSPF Configuration on Nokia SR OS
This domain tests the SR OS CLI: where OSPF is enabled, how interfaces join areas, and how routes enter OSPF.
Configuration skeleton
configure router
router-id 10.0.0.1
ospf
reference-bandwidth 100000
export "ospf-export"
area 0
interface "system"
passive
exit
interface "to-r2"
interface-type point-to-point
hello-interval 10
dead-interval 40
exit
exit
exit
Key points: OSPF is under config>router>ospf; interfaces are added per area with area>interface; the system interface is normally passive so the loopback prefix is advertised without hellos; an export policy is required before any non-OSPF route is redistributed; no shutdown is needed on the OSPF instance and interface where applicable.
Verification
show router ospf neighbor, show router ospf interface, show router ospf database, show router ospf routes, and show router ospf status confirm state, timers, LSAs, and SPF results. Logging and event inspection help with faults.
Worked example
A candidate configures area 0, adds interface "to-r2", and expects loopback 10.0.0.1/32 in the LSDB. It is missing because "system" was never added to the area. Adding interface "system" with passive fixes it: the prefix is advertised in a Type 1 LSA, but no hellos are sent.
Traps
Forgetting the export policy and wondering why connected or static routes are absent. Putting an interface in the wrong area. Setting a hello interval that does not match the peer. Using interface-type point-to-point on one side only.