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Nokia 4A0-108 Exam - Topic 1 Question 128 Discussion

The Draft-Rosen S-PMSI address range is configured for 32 group addresses. What happens if there are more than 32 customer multicast flows that exceed the threshold configured for the MVPN?
D) The source PE re-uses an S-PMSI that is currently in use for the 33rd flow. Traffic for both flows is sent on the same S-PMSI.
A) Traffic for the 33rd multicast flow is dropped.
B) Traffic for the 33rd multicast flow is transmitted on the I-PMSI.
C) The source PE reassigns the S-PMSI with the smallest flow to the new multicast flow. Traffic for the smaller flow is transmitted on the I-PMSI.

Nokia 4A0-108 Exam - Topic 1 Question 128 Discussion

Actual exam question for Nokia's 4A0-108 exam
Question #: 128
Topic #: 1
[All 4A0-108 Questions]

The Draft-Rosen S-PMSI address range is configured for 32 group addresses. What happens if there are more than 32 customer multicast flows that exceed the threshold configured for the MVPN?

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Suggested Answer: D

by Devorah at Jun 22, 2026, 02:52 AM

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Kanisha
13 days ago
D seems plausible too. Re-using an S-PMSI could save resources.
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Major
18 days ago
I lean towards C. It makes sense to reassign the smallest flow.
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Carey
23 days ago
I think A is correct. More than 32 flows, one gets dropped.
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Paulene
28 days ago
C seems plausible, but I doubt it would reassign like that.
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Lorita
1 month ago
B is incorrect, it doesn't go on the I-PMSI.
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Jani
1 month ago
Wait, really? I thought it would just reroute or something.
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Hershel
1 month ago
Totally agree with A! That's how it works.
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Stephanie
2 months ago
A) Traffic for the 33rd multicast flow is dropped.
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Delisa
2 months ago
I feel like there's a possibility that the 33rd flow could just use an existing S-PMSI, but I need to double-check how that works with multiple flows.
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Margurite
2 months ago
If I remember correctly, the source PE might reassign the S-PMSI for the smallest flow to accommodate the new one, but I'm not 100% certain.
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Cecilia
2 months ago
I think I practiced a similar question where exceeding the multicast limit resulted in traffic being dropped, but I can't recall if that's always the case.
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Lashunda
2 months ago
I remember something about multicast flows, but I'm not entirely sure how the S-PMSI handles more than 32 flows.
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