Quick Answer
The answer is that the router has two OSPF routes to different subnets, as confirmed by the `show ip route ospf` output interpretation. This is correct because the output lists two distinct OSPF-learned prefixes—10.1.1.0/24 and 10.2.2.0/24—both reachable via the same next hop of 192.168.1.2, with administrative distance 110 (the default for OSPF) and metrics of 20 and 30 respectively. On the Cisco CCNP ENARSI 300-410 exam, this command tests your ability to quickly parse OSPF route codes, administrative distance, and metric values to verify routing table entries; a common trap is misreading the “O” code as a single route or assuming the same next hop implies a load-balancing scenario. Remember that each “O” line represents a separate network, not a path to the same network. For a quick memory tip: think of the “O” as “One network per line”—if the network IDs differ, they are distinct routes, regardless of the next hop.
This 300-410 practice question tests your understanding of mpls operations. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A network engineer runs the following command on Router R1:
R1# show ip route ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP a - application route + - replicated route, % - next hop override
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks O 10.1.1.0/24 [110/20] via 192.168.1.2, 00:15:30, GigabitEthernet0/0 O 10.2.2.0/24 [110/30] via 192.168.1.2, 00:15:30, GigabitEthernet0/0
Based on this output, which statement is correct?
The router has a default route via OSPF.
Why wrong: The output says 'Gateway of last resort is not set'.
The router has two OSPF routes to different subnets.
Two OSPF routes are listed: 10.1.1.0/24 and 10.2.2.0/24.
The OSPF neighbor is down.
Why wrong: Routes are present, so the neighbor is up.
The metric for 10.2.2.0/24 is 20.
Why wrong: The metric is 30, not 20.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The router has two OSPF routes to different subnets.
The output shows two OSPF routes via the same next hop. The administrative distance is 110 (default for OSPF), and the metrics are 20 and 30. No problems are indicated; the routes are present and valid.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
The router has a default route via OSPF.
Why it's wrong here
The output says 'Gateway of last resort is not set'.
The router has two OSPF routes to different subnets.
The OSPF neighbor is down.
Why it's wrong here
Routes are present, so the neighbor is up.
The metric for 10.2.2.0/24 is 20.
Why it's wrong here
The metric is 30, not 20.
Common exam traps
OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.
Trap categories for this question
Command / output trap
The output says 'Gateway of last resort is not set'.
Detailed technical explanation
OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.
Key takeaway
OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Real-world example
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
What to study next
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
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FAQ
MPLS Operations — This question tests MPLS Operations — OSPF neighbours must agree on key parameters..
The correct answer is: The router has two OSPF routes to different subnets. — The output shows two OSPF routes via the same next hop. The administrative distance is 110 (default for OSPF), and the metrics are 20 and 30. No problems are indicated; the routes are present and valid.
Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related 300-410 OSPF questions on adjacency and route selection.
OSPF neighbours must agree on key parameters.
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Last reviewed: Jun 18, 2026
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