- A
The SNMP agent is correctly responding to a GetRequest from the NMS at 10.1.1.1.
The debug output shows a GetRequest followed by a GetResponse with errstat 0, indicating successful communication.
- B
The SNMP agent is failing to process the request due to a community string mismatch.
Why wrong: The community string 'public' is shown in the request, and the response has no error, so there is no mismatch.
- C
The SNMP agent is sending a trap to the NMS at 10.1.1.1.
Why wrong: The debug shows a GetRequest/GetResponse exchange, not a trap.
- D
The SNMP agent is ignoring the request due to an ACL blocking the NMS.
Why wrong: The output shows the packet was received and processed, so no ACL is blocking it.
Question 367 of 2,152
How to Interpret debug snmp packets Output
This 300-410 practice question tests your understanding of snmp troubleshooting. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 to troubleshoot an SNMP issue:
R1# debug snmp packets SNMP: Packet received via UDP from 10.1.1.1 on port 161 SNMP: GetRequest, reqid 12345, errstat 0, errindex 0 SNMP: Community string: public SNMP: MIB object: 1.3.6.1.2.1.1.1.0 (sysDescr) SNMP: Value: Cisco IOS Software, C1900 Software (C1900-UNIVERSALK9-M), Version 15.7(3)M SNMP: Packet sent via UDP to 10.1.1.1 on port 161 SNMP: GetResponse, reqid 12345, errstat 0, errindex 0
What does this debug output indicate?
Quick Answer
The answer is that the SNMP agent is correctly responding to a GetRequest from the NMS at 10.1.1.1. This is correct because the debug snmp packets output shows a complete and error-free exchange: the agent receives a GetRequest for the sysDescr OID (1.3.6.1.2.1.1.1.0) using the community string “public,” and immediately sends back a GetResponse with errstat 0 and errindex 0, confirming the requested value. On the Cisco CCNP ENARSI 300-410 exam, interpreting debug snmp packets output tests your ability to verify SNMP agent functionality and troubleshoot common misconfigurations like incorrect community strings or ACL blocks. A common trap is focusing only on the request and missing the response’s error status—here, errstat 0 is the key indicator of success. For a quick memory tip, remember “GetRequest with errstat 0 means the agent is a hero”—zero errors means the SNMP agent is responding as expected.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The SNMP agent is correctly responding to a GetRequest from the NMS at 10.1.1.1.
The debug output shows a complete SNMP GetRequest/GetResponse exchange between the NMS at 10.1.1.1 and the router acting as an SNMP agent. The agent receives a GetRequest for sysDescr (OID 1.3.6.1.2.1.1.1.0), processes it successfully (errstat 0, errindex 0), and sends back a GetResponse containing the system description. This confirms the SNMP agent is functioning correctly and responding to queries from the NMS.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 SNMP agent is correctly responding to a GetRequest from the NMS at 10.1.1.1.
Why this is correct
The debug output shows a GetRequest followed by a GetResponse with errstat 0, indicating successful communication.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The SNMP agent is failing to process the request due to a community string mismatch.
Why it's wrong here
The community string 'public' is shown in the request, and the response has no error, so there is no mismatch.
- ✗
The SNMP agent is sending a trap to the NMS at 10.1.1.1.
Why it's wrong here
The debug shows a GetRequest/GetResponse exchange, not a trap.
- ✗
The SNMP agent is ignoring the request due to an ACL blocking the NMS.
Why it's wrong here
The output shows the packet was received and processed, so no ACL is blocking it.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between SNMP Get/Set operations (which use UDP 161) and SNMP traps/informs (which use UDP 162), so candidates may mistakenly interpret a GetResponse as a trap if they overlook the direction and port details in the debug output.
Trap categories for this question
Command / output trap
The community string 'public' is shown in the request, and the response has no error, so there is no mismatch.
Detailed technical explanation
How to think about this question
SNMP GetRequest uses UDP port 161 for both the request and response, as seen here. The errstat field of 0 indicates no error occurred, and errindex 0 means no variable in the request caused an issue. In real-world troubleshooting, seeing errstat 0 confirms the community string, OID accessibility, and SNMP version compatibility are all correct, which is critical when isolating SNMP failures.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this 300-410 question test?
SNMP Troubleshooting — This question tests SNMP Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The SNMP agent is correctly responding to a GetRequest from the NMS at 10.1.1.1. — The debug output shows a complete SNMP GetRequest/GetResponse exchange between the NMS at 10.1.1.1 and the router acting as an SNMP agent. The agent receives a GetRequest for sysDescr (OID 1.3.6.1.2.1.1.1.0), processes it successfully (errstat 0, errindex 0), and sends back a GetResponse containing the system description. This confirms the SNMP agent is functioning correctly and responding to queries from the NMS.
What should I do if I get this 300-410 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jul 4, 2026
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