Quick Answer
The answer is that the BGP neighbor is down, and the EEM policy may have been triggered. This conclusion is drawn directly from the show commands: the EEM applet named BGP_Neighbor_Down is registered in the event manager policy list, while the show bgp neighbors output confirms the neighbor is in the Idle state, which indicates the TCP session has failed or never established. In the Cisco CCNP ENARSI 300-410 exam, this scenario tests your ability to correlate EEM policy registration with BGP session states—a common troubleshooting task where you must check if an EEM policy triggered by BGP neighbor down events actually fired. A frequent trap is assuming the policy ran just because it is registered; registration only means it is loaded, not that it executed. To verify execution, you would need additional logs like show event manager history events. Memory tip: “Registered is ready, Idle is idle—correlation does not guarantee causation.”
This 300-410 practice question tests your understanding of embedded event manager (eem). 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 event manager policy registered
No. Type Time Created Name 1 applet 00:01:23 UTC Mar 1 2025 BGP_Neighbor_Down
R1# show bgp neighbors 192.168.1.2
BGP neighbor is 192.168.1.2, remote AS 65002, external link BGP version 4, remote router ID 10.0.0.2 BGP state = Idle Last read 00:00:05, hold time is 180, keepalive interval is 60 seconds
Neighbor sessions:
1 active, is not multisession capable
Based on this output, what is the most likely conclusion?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
The BGP neighbor is up and running.
Why wrong: The state is Idle, which means the session is down.
The BGP neighbor is down, and the EEM policy may have been triggered.
The Idle state indicates the session is down, which would likely trigger the BGP_Neighbor_Down event.
The EEM policy is not registered.
Why wrong: The policy is listed as registered.
The BGP session is established.
Why wrong: Idle state means not established.
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 BGP neighbor is down, and the EEM policy may have been triggered.
The EEM policy BGP_Neighbor_Down is registered, and the BGP neighbor is in Idle state, indicating the session is down. The correct answer is that the BGP neighbor is down, and the EEM policy may have been triggered.
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 BGP neighbor is up and running.
Why it's wrong here
The state is Idle, which means the session is down.
The BGP neighbor is down, and the EEM policy may have been triggered.
Why this is correct
The Idle state indicates the session is down, which would likely trigger the BGP_Neighbor_Down event.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
OSPF neighbours must agree on key parameters.
The EEM policy is not registered.
Why it's wrong here
The policy is listed as registered.
The BGP session is established.
Why it's wrong here
Idle state means not established.
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.
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
Embedded Event Manager (EEM) — This question tests Embedded Event Manager (EEM) — OSPF neighbours must agree on key parameters..
The correct answer is: The BGP neighbor is down, and the EEM policy may have been triggered. — The EEM policy BGP_Neighbor_Down is registered, and the BGP neighbor is in Idle state, indicating the session is down. The correct answer is that the BGP neighbor is down, and the EEM policy may have been triggered.
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.
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
OSPF neighbours must agree on key parameters.
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Same concept, more angles
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A network engineer runs the following command on Router R1: R1# show event manager policy registered No. Type Time Created Name 1 applet 00:01:23 UTC Mar 1 2025 OSPF_Neighbor_Down R1# show ip ospf neighbor Neighbor ID Pri State Dead Time Address Interface 10.1.1.2 1 FULL/DR 00:00:36 192.168.1.2 GigabitEthernet0/0 Based on this output, what is the most likely conclusion?
mediumWhy C: The EEM policy OSPF_Neighbor_Down is registered, but the OSPF neighbor is in FULL state. The correct answer is that the EEM policy has not been triggered because the OSPF neighbor is up.
Variation 2. A network engineer runs the following command on Router R1: R1# show event manager policy registered No. Type Time Created Name 1 applet 00:01:23 UTC Mar 1 2025 BGP_Neighbor_Down R1# show bgp summary BGP router identifier 10.0.0.1, local AS number 65001 BGP table version is 1, main routing table version 1 Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 192.168.1.2 4 65002 5 5 1 0 0 00:02:00 Established Based on this output, which statement is correct?
mediumWhy C: The EEM policy BGP_Neighbor_Down is registered, but the BGP neighbor is in Established state. The correct answer is that the BGP neighbor is up and the EEM policy has not been triggered.
Variation 3. A network engineer runs the following command on Router R1: R1# show event manager policy registered No. Type Time Created Name 1 applet 00:01:23 UTC Mar 1 2025 EIGRP_Neighbor_Down R1# show ip eigrp neighbors IP-EIGRP neighbors for process 100 H Address Interface Hold Uptime SRTT RTO Q Seq (sec) (ms) Cnt Num 0 192.168.1.2 Gi0/0 13 00:02:00 40 200 0 5 Based on this output, what is the most likely problem?
hardWhy C: The EEM policy EIGRP_Neighbor_Down is registered, but the EIGRP neighbor is present with an uptime of 2 minutes. The correct answer is that the EEM policy has not been triggered because the neighbor is up; however, the policy is ready to act if the neighbor goes down.
Last reviewed: Jun 18, 2026
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