The correct statement is that the SPAN session is configured correctly and will forward traffic received on Gi0/10 into the network. This is because the output shows ingress is enabled on the destination port, which means the switch will process and forward any packets arriving on Gi0/10 just like a normal access port, rather than dropping them as is standard for a SPAN destination. On the Cisco CCNP ENARSI 300-410 exam, this scenario tests your understanding of how local SPAN sessions handle destination port behavior—specifically, that enabling ingress on the destination port breaks the typical one-way mirroring rule and can introduce loops or unwanted traffic. A common trap is assuming the destination port only receives mirrored traffic; in reality, with ingress enabled, it becomes a fully functional switch port. Memory tip: "Ingress on destination = traffic injection risk," so remember that a SPAN destination should normally have ingress disabled to keep mirrored traffic isolated.
300-410 SPAN, RSPAN, and ERSPAN Practice Question
This 300-410 practice question tests your understanding of span, rspan, and erspan. 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 switch SW4:
SW4# show monitor session 6
Session 6
---------
Type : Local Session
Source Ports :
Both : Gi0/8, Gi0/9
Destination Ports : Gi0/10
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The SPAN session is configured correctly and will forward traffic received on Gi0/10 into the network.
This is a local SPAN session with source ports Gi0/8 and Gi0/9, and destination port Gi0/10. The destination port has ingress enabled, which means traffic received on Gi0/10 will be processed and forwarded by the switch. This is unusual because SPAN destination ports typically have ingress disabled to prevent loops and forwarding of mirrored traffic. This configuration can cause network issues.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 SPAN session is configured correctly and will forward traffic received on Gi0/10 into the network.
Why this is correct
Ingress enabled on the destination port allows traffic received on that port to be forwarded, which is atypical and can cause issues.
Related concept
Static NAT maps one inside address to one outside address.
✗
The SPAN session is misconfigured because source ports cannot be monitored in both directions.
Why it's wrong here
Both directions are valid for SPAN source ports.
✗
The SPAN session is using RSPAN because the destination port has ingress enabled.
Why it's wrong here
RSPAN uses a VLAN as destination, not a port. Ingress enabled is unrelated to RSPAN.
✗
The SPAN session is disabled because the destination port has ingress enabled.
Why it's wrong here
The session is still active; ingress enabled does not disable the session.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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 the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 300-410 NAT questions on configuration and troubleshooting.
SPAN, RSPAN, and ERSPAN — This question tests SPAN, RSPAN, and ERSPAN — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The SPAN session is configured correctly and will forward traffic received on Gi0/10 into the network. — This is a local SPAN session with source ports Gi0/8 and Gi0/9, and destination port Gi0/10. The destination port has ingress enabled, which means traffic received on Gi0/10 will be processed and forwarded by the switch. This is unusual because SPAN destination ports typically have ingress disabled to prevent loops and forwarding of mirrored traffic. This configuration can cause network issues.
What should I do if I get this 300-410 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related 300-410 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
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 to troubleshoot a SPAN issue:
R1# show monitor session 1 detail
Session 1
---------
Type : Local Session
Source Ports :
Both : Gi0/0
Destination Ports : Gi0/1
Encapsulation : Native
Ingress : Disabled
What does this output indicate?
medium
✓ A.The session is correctly configured to send traffic from Gi0/0 to Gi0/1.
B.The session is misconfigured because the destination port should have ingress enabled.
C.The session is misconfigured because the source port must be a VLAN.
D.The session is misconfigured because encapsulation must be set to 'replicate'.
Why A: The output shows a local SPAN session with source port Gi0/0 (both directions) and destination port Gi0/1. The destination port is configured with native encapsulation and no ingress traffic is allowed.
Variation 2. A network engineer runs the following command to troubleshoot a SPAN issue:
R1# debug monitor session 1
*Mar 1 00:00:01.123: MONITOR: Session 1: Packet captured on Gi0/0, forwarded to Gi0/1
*Mar 1 00:00:02.456: MONITOR: Session 1: Packet captured on Gi0/0, forwarded to Gi0/1
What does this output indicate?
medium
✓ A.The SPAN session is correctly forwarding packets from Gi0/0 to Gi0/1.
B.The SPAN session is misconfigured because packets should not be forwarded.
C.The SPAN session is misconfigured because the debug output shows errors.
D.The SPAN session is misconfigured because the destination port is not specified.
Why A: The debug output shows that packets captured on source port Gi0/0 are being forwarded to destination port Gi0/1 for session 1. This indicates that the SPAN session is operational.
Variation 3. A network engineer runs the following command on switch SW5:
SW5# show monitor session 7
Session 7
---------
Type : Local Session
Source Ports :
Both : Gi0/11
Destination Ports : Gi0/12
Encapsulation : Replicate
Ingress : Disabled
Based on this output, which statement is correct?
medium
✓ A.The SPAN session will replicate the original VLAN tag on the mirrored traffic sent to Gi0/12.
B.The SPAN session will strip the VLAN tag from the mirrored traffic.
C.The SPAN session is using RSPAN because the encapsulation is set to Replicate.
D.The SPAN session is misconfigured because encapsulation Replicate is not supported.
Why A: This is a local SPAN session with source port Gi0/11 and destination port Gi0/12. The encapsulation is set to 'Replicate', which means the mirrored traffic retains its original VLAN tag. This is typical when the destination port is a trunk port and the analyzer expects tagged traffic.
Variation 4. A network engineer runs the following command on switch SW1:
SW1# show monitor session 1
Session 1
---------
Type : Local Session
Source Ports :
Both : Gi0/1, Gi0/2
Destination Ports : Gi0/3
Encapsulation : Native
Ingress : Disabled
Based on this output, which statement is correct?
medium
✓ A.The SPAN session is monitoring traffic on Gi0/1 and Gi0/2 and sending it to Gi0/3.
B.The SPAN session is monitoring traffic on Gi0/3 and sending it to Gi0/1 and Gi0/2.
C.The SPAN session is using RSPAN because the destination port has ingress disabled.
D.The SPAN session is not active because the destination port is not in forwarding state.
Why A: The output shows a local SPAN session with source ports Gi0/1 and Gi0/2, and destination port Gi0/3. The destination port is configured with native encapsulation and ingress is disabled, meaning traffic received on the destination port is not forwarded. The session is active and correctly configured.
Last reviewed: Jun 19, 2026
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