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300-410 Practice Question: Runs the following command to troubleshoot an…
A network engineer runs the following command to troubleshoot an ERSPAN issue:
R1# show monitor session 5 detail
Session 5 --------- Type : ERSPAN Destination Session Source IP : 10.1.1.2 ERSPAN ID : 100 Destination Ports : Gi0/3
Encapsulation : Native
Ingress : Disabled
What does this output indicate?
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 session is correctly configured as an ERSPAN destination session.
The output shows an ERSPAN destination session with source IP 10.1.1.2, ERSPAN ID 100, and destination port Gi0/3. This is the destination side of an ERSPAN configuration.
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 session is correctly configured as an ERSPAN destination session.
Why this is correct
The output confirms an ERSPAN destination session with a source IP and ERSPAN ID.
- ✗
The session is misconfigured because the source must be a VLAN, not an IP.
Why it's wrong here
ERSPAN destination sessions use an IP address as the source.
- ✗
The session is misconfigured because the destination port must have ingress enabled.
Why it's wrong here
Ingress is optional and not required for ERSPAN destination sessions.
- ✗
The session is misconfigured because the ERSPAN ID must be different from the source session.
Why it's wrong here
The ERSPAN ID must match between source and destination sessions.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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