The answer is that the EIGRP adjacency is functioning correctly, as the output from the show ip eigrp vrf RED neighbors command reveals no anomalies. Both neighbors show healthy parameters: low SRTT values (12 and 15 ms) indicate fast round-trip times, a Q count of zero confirms no packets are queued, and incrementing sequence numbers prove active route exchange. On the Cisco CCNP ENARSI 300-410 exam, this command tests your ability to interpret VRF-Lite neighbor states under the EIGRP for IPv4 address family, where common traps include misreading normal hold times (12–13 seconds) as a problem or assuming low uptime indicates failure. Remember that a healthy neighbor always shows a Q count of zero and an SRTT under 200 ms; the hold timer simply counts down from the configured hold time and resets with each received hello. For a quick memory tip: “Zero Q, low SRTT, and climbing Seq—that’s a healthy EIGRP VRF-Lite neighbor.”
300-410 VRF-Lite Practice Question
This 300-410 practice question tests your understanding of vrf-lite. 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 eigrp vrf RED neighbors
EIGRP-IPv4 Neighbors for AS(100) VRF RED
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 192.168.1.2 Gi0/2 13 00:15:30 12 200 0 45
1 192.168.2.2 Gi0/3 12 00:14:20 15 200 0 32
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The EIGRP adjacency is functioning correctly.
The output shows two EIGRP neighbors for VRF RED. Both are in normal state with low SRTT and no Q count. There is no obvious problem. However, the hold times are 13 and 12 seconds, which are typical. The uptimes are similar. The output is healthy. But if the question implies a problem, it might be that the neighbors are not exchanging routes? But the Seq numbers are incrementing, indicating activity. Actually, no problem is evident. The correct answer should be that the EIGRP adjacency is functioning correctly.
Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The EIGRP neighbors are not exchanging routes because the Seq numbers are low.
Why it's wrong here
Seq numbers are normal and indicate sequence numbers of last packets received.
✗
Both neighbors are in the Init state.
Why it's wrong here
The 'H' column shows 0 and 1, and the state is not shown because it is normal; Init would be indicated by 'Init' in the output.
✓
The EIGRP adjacency is functioning correctly.
Why this is correct
The neighbors are up with low SRTT and no Q count, indicating stable adjacencies.
Hold time of 13 seconds is within normal range (default 15).
Common exam traps
Common exam trap: OSPF can fail even when IP connectivity looks correct
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 'H' column shows 0 and 1, and the state is not shown because it is normal; Init would be indicated by 'Init' in the output.
Detailed technical explanation
How to think about this question
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.
KKey Concepts to Remember
OSPF neighbours must agree on key parameters.
Router ID selection can affect neighbour relationships and LSDB output.
OSPF cost influences the preferred path.
A route can appear in OSPF information but not become the installed route.
TExam Day Tips
→Check area mismatch first when OSPF adjacency fails.
→Review passive interfaces when a network is advertised but no neighbour forms.
→Use show ip ospf neighbor and show ip route clues carefully.
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
How this comes up in practice
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
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.
VRF-Lite — This question tests VRF-Lite — OSPF neighbours must agree on key parameters..
What is the correct answer to this question?
The correct answer is: The EIGRP adjacency is functioning correctly. — The output shows two EIGRP neighbors for VRF RED. Both are in normal state with low SRTT and no Q count. There is no obvious problem. However, the hold times are 13 and 12 seconds, which are typical. The uptimes are similar. The output is healthy. But if the question implies a problem, it might be that the neighbors are not exchanging routes? But the Seq numbers are incrementing, indicating activity. Actually, no problem is evident. The correct answer should be that the EIGRP adjacency is functioning correctly.
What should I do if I get this 300-410 question wrong?
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.
What is the key concept behind this question?
OSPF neighbours must agree on key parameters.
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