- A
The RSPAN VLAN must be configured as a standard VLAN and allowed on all trunk links between the source and destination switches.
Why wrong: This option is incorrect. The RSPAN VLAN must be allowed only on trunk links that are actually in the path of the mirrored traffic, not necessarily all trunk links between the source and destination switches.
- B
The source session on the source switch must specify 'remote vlan <vlan-id>' to identify the RSPAN VLAN.
This option is correct. On the source switch, the monitor session configuration includes 'destination remote vlan <vlan-id>' to specify the RSPAN VLAN.
- C
The RSPAN VLAN can be used for normal data traffic as long as it is not the native VLAN.
Why wrong: This option is incorrect. The RSPAN VLAN is dedicated for mirrored traffic and must not be used for normal data traffic, even if it is not the native VLAN.
- D
The destination session on the remote switch uses 'monitor session <session> source remote vlan <vlan-id>' and 'destination interface <interface>'.
This option is correct. On the destination switch, the monitor session uses 'source remote vlan <vlan-id>' and 'destination interface <interface>' to receive and forward the mirrored traffic.
- E
Intermediate switches that only pass the RSPAN VLAN must have a monitor session configured to forward the traffic.
Why wrong: This option is incorrect. Intermediate switches only need to have the RSPAN VLAN in the allowed list on trunk interfaces; they do not require a monitor session.
300-410 SPAN, RSPAN, and ERSPAN Practice Question
This 300-410 practice question tests your understanding of span, rspan, and erspan. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Which TWO statements about RSPAN configuration and operation are correct? (Choose TWO.)
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 source session on the source switch must specify 'remote vlan <vlan-id>' to identify the RSPAN VLAN.
RSPAN uses a dedicated VLAN to carry mirrored traffic between switches. The source switch must specify the RSPAN VLAN in the destination portion of the monitor session using the 'remote vlan' keyword. The destination switch creates a session that sources from the remote VLAN and forwards to a local interface. The RSPAN VLAN must exist on all switches in the path but does not need to be allowed on every trunk link—only on trunks that carry the RSPAN traffic. Option A is incorrect because it states 'allowed on all trunk links,' which is overly broad; the VLAN only needs to be permitted on the specific trunks that are part of the RSPAN path. Option B is correct as the source session indeed uses 'remote vlan' to identify the RSPAN VLAN. Option D correctly describes the destination session syntax. Options C and E are false.
Key principle: A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.
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 RSPAN VLAN must be configured as a standard VLAN and allowed on all trunk links between the source and destination switches.
- ✓
The source session on the source switch must specify 'remote vlan <vlan-id>' to identify the RSPAN VLAN.
- ✗
The RSPAN VLAN can be used for normal data traffic as long as it is not the native VLAN.
Why it's wrong here
This option is incorrect. The RSPAN VLAN is dedicated for mirrored traffic and must not be used for normal data traffic, even if it is not the native VLAN.
- ✓
The destination session on the remote switch uses 'monitor session <session> source remote vlan <vlan-id>' and 'destination interface <interface>'.
- ✗
Intermediate switches that only pass the RSPAN VLAN must have a monitor session configured to forward the traffic.
Common exam traps
Common exam trap: an active trunk can still block the VLAN you need
A trunk being up does not prove every VLAN is crossing it. Check allowed VLAN lists, native VLAN mismatch, VLAN existence and access-port assignment.
Detailed technical explanation
How to think about this question
VLAN questions usually combine access-port and trunking clues. The key is to identify whether the issue is local to one switchport, caused by the trunk, or caused by the VLAN not existing where it needs to exist.
KKey Concepts to Remember
- Access ports place end devices into a single VLAN.
- Trunk ports carry multiple VLANs between switches.
- Allowed VLAN lists decide which VLANs can cross a trunk.
- Native VLAN mismatch can create confusing symptoms.
TExam Day Tips
- Use show vlan brief to verify access VLANs.
- Use show interfaces trunk to verify trunk state and allowed VLANs.
- Do not treat every same-VLAN issue as a routing problem.
Key takeaway
A trunk being up does not mean the VLAN is allowed across it. Always verify the allowed VLAN list and whether the VLAN exists on both switches.
Real-world example
How this comes up in practice
A help-desk technician troubleshoots why a newly connected PC cannot reach shared printers on the same floor. The cable is good, the switch port is active, but the PC is in VLAN 20 and the printers are in VLAN 10. The uplink trunk only allows VLAN 10. A trunk being up does not mean every VLAN crosses it.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related 300-410 questions on switching, trunking, and access-port configuration.
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FAQ
Questions learners often ask
What does this 300-410 question test?
SPAN, RSPAN, and ERSPAN — This question tests SPAN, RSPAN, and ERSPAN — Access ports place end devices into a single VLAN..
What is the correct answer to this question?
The correct answer is: The source session on the source switch must specify 'remote vlan <vlan-id>' to identify the RSPAN VLAN. — RSPAN uses a dedicated VLAN to carry mirrored traffic between switches. The source switch must specify the RSPAN VLAN in the destination portion of the monitor session using the 'remote vlan' keyword. The destination switch creates a session that sources from the remote VLAN and forwards to a local interface. The RSPAN VLAN must exist on all switches in the path but does not need to be allowed on every trunk link—only on trunks that carry the RSPAN traffic. Option A is incorrect because it states 'allowed on all trunk links,' which is overly broad; the VLAN only needs to be permitted on the specific trunks that are part of the RSPAN path. Option B is correct as the source session indeed uses 'remote vlan' to identify the RSPAN VLAN. Option D correctly describes the destination session syntax. Options C and E are false.
What should I do if I get this 300-410 question wrong?
Review VLAN allowed lists, native VLAN mismatch detection, and how to verify VLAN membership with show vlan brief and show interfaces trunk. Then practise related 300-410 questions on switching, trunking, and access-port configuration.
What is the key concept behind this question?
Access ports place end devices into a single VLAN.
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Last reviewed: Jun 19, 2026
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