mediumMultiple Choice
300-410 RSPAN Practice Question
Examine the RSPAN configuration:
vlan 100
name RSPAN_VLAN remote-span ! monitor session 1 source interface GigabitEthernet1/0/1 both monitor session 1 destination remote vlan 100
What is the purpose of the 'remote-span' command under VLAN 100?
⚠ Common exam trap
300-410 often tests the specific purpose of the 'remote-span' command. Candidates might confuse it with spanning tree or native VLAN configuration, or think it prevents user traffic, but its primary role is to designate the VLAN for RSPAN use.
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
✓
It allows VLAN 100 to be used for RSPAN traffic across multiple switches.
The 'remote-span' command under a VLAN configuration designates that VLAN as an RSPAN VLAN, which is used to carry mirrored traffic across multiple switches in an RSPAN session. This allows the destination port to be on a different switch than the source.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
It allows VLAN 100 to be used for RSPAN traffic across multiple switches.
Why this is correct
The remote-span command designates VLAN 100 as an RSPAN VLAN, allowing source-port traffic to be carried in that VLAN across trunk links between switches to a destination session on a remote device. Without it, the VLAN cannot transport RSPAN traffic.
- ✗
It enables spanning tree on VLAN 100.
Why it's wrong here
The remote-span command designates VLAN 100 as an RSPAN VLAN, allowing monitored traffic to be carried across trunk links to a destination switch. It does not enable spanning tree; STP runs independently on the VLAN. You would use remote-span specifically when the destination port sits on a different switch from the source.
- ✗
It prevents VLAN 100 from being used for user data traffic.
Why it's wrong here
While it is true that RSPAN VLANs are not used for user data, the primary purpose of the command is to enable the VLAN for RSPAN traffic; preventing user data is a consequence, not the intended purpose.
- ✗
It configures VLAN 100 as a native VLAN.
Why it's wrong here
The remote-span command designates VLAN 100 as the RSPAN transport VLAN carrying mirrored traffic across trunk links, not as a native VLAN. Native VLAN configuration is the correct task when untagged frames must belong to a specific VLAN on an 802.1Q trunk.
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Same concept, more angles
1 more way this is tested on 300-410
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Variation 1. What is missing from this RSPAN configuration on a switch? monitor session 1 source interface GigabitEthernet1/0/1 both monitor session 1 destination remote vlan 100 Assume VLAN 100 exists but is not configured as an RSPAN VLAN.
medium- ✓ A.The 'remote-span' command under VLAN 100.
- B.An IP address on the destination interface.
- C.A destination interface on the source switch.
- D.The 'no shutdown' command on VLAN 100.
Why A: For RSPAN to work, the VLAN used as the destination remote VLAN must be configured with the 'remote-span' command. Without it, the session will not function correctly.
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
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