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Cisco 300-710 Exam - Topic 8 Question 126 Discussion

An administrator is configuring their transparent Cisco FTD device to receive ERSPAN traffic from multiple switches on a passive port, but the Cisco FTD is not processing the traffic. What is the problem?
C) The Cisco FTD must be in routed mode to process ERSPAN traffic.
A) The switches do not have Layer 3 connectivity to the FTD device for GRE traffic transmission.
B) The switches were not set up with a monitor session ID that matches the flow ID defined on the CiscoFTD.
D) The Cisco FTD must be configured with an ERSPAN port not a passive port.

Cisco 300-710 Exam - Topic 8 Question 126 Discussion

Actual exam question for Cisco's 300-710 exam
Question #: 126
Topic #: 8
[All 300-710 Questions]

An administrator is configuring their transparent Cisco FTD device to receive ERSPAN traffic from multiple switches on a passive port, but the Cisco FTD is not processing the traffic. What is the problem?

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Suggested Answer: C

by Bernardo at Jun 20, 2026, 10:09 AM

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Marnie
13 days ago
I'm leaning towards A. Without Layer 3, GRE traffic won't go through.
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Lavonna
18 days ago
I feel like B is the issue. The monitor session ID needs to match.
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Justine
24 days ago
I think it's option D. Passive ports can't handle ERSPAN.
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Merrilee
29 days ago
Hmm, I’m not convinced about that. Could it really be just a port issue?
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Lashawn
1 month ago
Yeah, I agree with D, it needs an ERSPAN port for sure.
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Suzan
1 month ago
Wait, are you sure about option C? I thought FTD could handle it in transparent mode.
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Tambra
1 month ago
I think it's option B, the session ID mismatch is a common issue.
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Willard
2 months ago
Definitely option D, passive ports can't handle ERSPAN.
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Dwight
2 months ago
I’m leaning towards option A, but I’m not completely sure if Layer 3 connectivity is the main issue here.
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Vivan
2 months ago
I feel like the issue could be related to the passive port configuration. I vaguely recall that ERSPAN needs a dedicated port.
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William
2 months ago
I think I saw a question like this in practice, and it might have been about needing a routed mode for ERSPAN to work properly.
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Marya
2 months ago
I remember something about ERSPAN needing specific configurations on both ends, but I'm not sure if it's the monitor session ID or something else.
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