hardMultiple Choice
300-410 Practice Question: Configures an RSPAN session on Switch A to…
A network engineer configures an RSPAN session on Switch A to monitor traffic from interface GigabitEthernet0/1 and sends it to Switch B. The engineer creates RSPAN VLAN 50 on both switches and configures the trunk between them to allow VLAN 50. On Switch B, the engineer configures the destination port as GigabitEthernet0/2 in VLAN 50. The engineer notices that the destination port is not forwarding any traffic. What should the engineer check first?
⚠ Common exam trap
300-410 often tests RSPAN configuration details, and candidates frequently overlook the need for the 'remote-span' command on the RSPAN VLAN, assuming that creating the VLAN and allowing it on trunks is sufficient.
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
✓
Verify that the RSPAN VLAN is configured with the 'remote-span' command on both switches.
The most likely issue is that the RSPAN VLAN is not properly configured with the 'remote-span' command on both switches. Without this command, the VLAN is treated as a normal VLAN, and the destination port will not forward the mirrored traffic. The 'remote-span' command designates the VLAN as an RSPAN VLAN, enabling it to carry mirrored traffic across trunk links.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Verify that the RSPAN VLAN is configured with the 'remote-span' command on both switches.
Why this is correct
The RSPAN VLAN must be defined as a remote-span VLAN on every participating switch; otherwise the destination port stays inactive and forwards nothing. Verifying the 'remote-span' command under VLAN 50 configuration on both switches is the first check.
- ✗
Check that the destination port is not in a shutdown state.
Why it's wrong here
A shutdown destination port would show down/down, but the stem gives no indication of link-state failure, and RSPAN destination ports stay in the RSPAN VLAN rather than forwarding normally. It is tempting because interface shutdown is a common first check, yet the real issue is the RSPAN VLAN not being designated as remote-span.
- ✗
Ensure that the source interface is not configured with 'no monitor session'.
Why it's wrong here
The 'no monitor session' command removes an entire session, so if it were applied the source would not be monitored at all — but the stem confirms monitoring is configured. It is tempting because session removal does stop traffic, yet the actual fault lies with the RSPAN VLAN's remote-span designation, not session deletion.
- ✗
Confirm that the trunk between switches is configured as a dot1q trunk.
Why it's wrong here
The trunk already carries VLAN 50, so dot1q encapsulation is not the fault; RSPAN requires the destination port to be removed from VLAN 50 and configured as a monitor destination, since a port in that VLAN cannot forward monitored traffic. Dot1q trunking is correct when VLANs must traverse a link.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
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.