The correct answer is that both sessions are properly configured and can operate simultaneously. This is because a Cisco switch running IOS or IOS-XE supports the coexistence of local and RSPAN sessions as independent monitoring constructs, each using separate hardware resources and VLANs. Session 1 uses a local destination port (Gi0/1) for direct traffic mirroring, while Session 2 uses RSPAN VLAN 100 as its destination, allowing mirrored traffic to be tunneled across the network to a remote analyzer. On the Cisco CCNP ENARSI 300-410 exam, this scenario tests your understanding that SPAN and RSPAN sessions do not conflict unless they share the same source or destination resources, a common trap where candidates assume only one session type can run at a time. A key memory tip is "Local goes to port, RSPAN goes to VLAN"—as long as these destinations differ, both sessions can coexist without issue.
300-410 SPAN, RSPAN, and ERSPAN Practice Question
This 300-410 practice question tests your understanding of span, rspan, and erspan. 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 a SPAN issue:
R1# show monitor session all
Session 1
---------
Type : Local Session
Source Ports :
Both : Gi0/0
Destination Ports : Gi0/1
Encapsulation : Native
Ingress : Disabled
Session 2
---------
Type : Remote Source Session
Source Ports :
Both : Gi0/2
Destination RSPAN VLAN : 100
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Both sessions are correctly configured and can operate simultaneously.
The output shows two sessions: Session 1 is a local SPAN session, and Session 2 is an RSPAN source session. This is a valid configuration for multiple monitoring sessions.
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.
✓
Both sessions are correctly configured and can operate simultaneously.
Why this is correct
Multiple SPAN sessions can coexist on the same device.
Related concept
Access ports place end devices into a single VLAN.
✗
Session 1 is misconfigured because it cannot coexist with an RSPAN session.
Why it's wrong here
Local SPAN and RSPAN sessions can coexist.
✗
Session 2 is misconfigured because the RSPAN VLAN must be used only for RSPAN.
Both sessions are misconfigured because they use the same source port.
Why it's wrong here
The sessions use different source ports (Gi0/0 and Gi0/2).
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.
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 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.
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: Both sessions are correctly configured and can operate simultaneously. — The output shows two sessions: Session 1 is a local SPAN session, and Session 2 is an RSPAN source session. This is a valid configuration for multiple monitoring sessions.
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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