Nokia NRS II Composite (OSPF) study guide
Nokia NRS II Composite (OSPF) · Work through your exam, one topic at a time.
The Nokia NRS II Composite (OSPF) is an independent study resource for network engineers who already hold Nokia Routing Specialist I knowledge or equivalent hands-on experience and want to validate advanced OSPFv2/OSPFv3 skills in Nokia SR OS environments. It targets design, implementation, and troubleshooting roles in service provider and large enterprise networks where OSPF is used for underlay and area design. The Nokia NRS II Composite (OSPF) study guide has 13 sections and about 4,198 words.
01OSPF Fundamentals
This domain tests the base mechanics: how SR OS routers form adjacencies, how areas scope flooding, how the router identity is chosen and how a DR/BDR is elected. Questions here are short but usually turn on one exact prerequisite.
355 words, about 2 min02Packet Types and Neighbor State Machine
This domain checks whether you can read a neighbor state and name the packet exchange that produced it. It is the most common source of "why is my adjacency stuck" questions.
309 words, about 2 min03Link-State Database
The LSDB domain tests whether you understand that every router in an area holds the same LSA set, how LSAs are aged and refreshed, and how to read the database on SR OS. The LSDB is per area.
326 words, about 2 min04LSAs and Area Types
This domain tests which LSA types exist in which area type, and what an ABR or ASBR does with them. Nokia exams often frame it as "which LSAs will this router see".
344 words, about 2 min05SPF Computation
This domain tests how the LSDB becomes routes: per-area Dijkstra, then summary and external processing, and how to confirm the result on SR OS. SPF runs independently per area.
347 words, about 2 min06Metrics and ECMP
This domain tests cost manipulation and equal-cost multipath. Expect questions on where the metric is set, what the default is, and when ECMP does not happen.
331 words, about 2 min07Virtual Links
Virtual links repair a broken backbone or connect a remote area to area 0 through a transit area. They are configuration-light but concept-heavy, and they are a favourite exam trap.
330 words, about 2 min08Stub/NSSA Areas and Route Redistribution
This domain combines area-type design with injection: what an ABR advertises into a stub or NSSA, and how redistribution enters OSPF from other protocols. A stub area blocks type 5 and type 4.
338 words, about 2 min09OSPFv2/OSPFv3 Configuration on Nokia SR OS
This domain tests practical CLI: where the instance, area and interface live, and how OSPFv3 differs from OSPFv2 in SR OS. OSPFv2 lives under configure router ospf ; OSPFv3 lives under configure router ospf3 in the same router context.
271 words, about 1 min10Authentication, Security and Area Protection
This domain tests how OSPF adjacencies are protected and where the controls sit: per interface, per area, or per protocol version. OSPFv2 supports null, simple password and MD5.
311 words, about 2 min11Convergence
This domain tests how fast OSPF reacts to change and which timers and features control that reaction. Questions usually ask what to tune and what the trade-off is.
302 words, about 2 min12Convergence, Fast Reroute and LFA / TI-LFA
This domain tests pre-computed repair paths: how a loop-free alternate is qualified, when no LFA exists, and how remote LFA and TI-LFA fill the gap. An LFA is a neighbour that reaches the destination without looping back through the protected router.
339 words, about 2 min13Troubleshooting, Verification and Show Commands
This domain tests whether you can prove a diagnosis with SR OS commands rather than guess. Expect scenario questions that give a symptom and ask for the next command or the likely cause.
295 words, about 1 min