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300-410 Practice Question: An engineer configures RSPAN on a Cisco switch to…
An engineer configures RSPAN on a Cisco switch to monitor traffic from VLAN 10 across multiple switches. The engineer creates an RSPAN VLAN (VLAN 100) on the source switch and configures the source as VLAN 10. On the remote switch, the engineer configures the destination port as GigabitEthernet0/1 in VLAN 100. However, the destination port does not forward any monitored traffic. What is the most likely cause?
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 RSPAN VLAN is not allowed on the trunk links between the switches.
RSPAN requires that the RSPAN VLAN be allowed on all trunk links between the source and destination switches. If the RSPAN VLAN is not allowed on the trunk, the traffic will not reach the destination.
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 is not allowed on the trunk links between the switches.
Why this is correct
Correct because the RSPAN VLAN must be permitted on all intermediate trunks for the monitored traffic to traverse the network.
- ✗
The destination port is configured as an access port in VLAN 100.
Why it's wrong here
Incorrect because the destination port should be in the RSPAN VLAN, but that alone does not cause the issue; the traffic must first reach the remote switch.
- ✗
The source switch does not have the RSPAN VLAN configured as a remote-span VLAN.
Why it's wrong here
Incorrect because the RSPAN VLAN is created with the 'remote-span' command; missing this would cause a different error, but the primary issue here is trunking.
- ✗
The destination port is not configured with 'monitor session' on the remote switch.
Why it's wrong here
Incorrect because the destination port is configured, but the traffic must first be delivered via the RSPAN VLAN.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.