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Cisco 400-007 Exam - Topic 9 Question 63 Discussion

Customer XYZ network consists of an MPLS core. IS-IS running as IGP a pair of BGP route reflectors for route propagation, and a few dozens of MPLS-TE tunnels for specific tactical traffic engineering requirements. The customer's engineering department has some questions about the use of the Overload Bit in the IS-IS networks and how it could be used to improve their current network design. Which two concepts about the Overload Bit are true? (Choose two.)
A) It can be set on a router during the startup process for a fixed period of time and D) It can be set on a router until other interacting protocols have signaled convergence.
B) Networks advertised within the LSPs of the respective node will become unreachable
C) It forces the midpoint MPLS-TE node to reoptimize the primary tunnels going through the OL node.
E) It is not recommended on BGP Route Reflectors

Cisco 400-007 Exam - Topic 9 Question 63 Discussion

Actual exam question for Cisco's 400-007 exam
Question #: 63
Topic #: 9
[All 400-007 Questions]

Customer XYZ network consists of an MPLS core. IS-IS running as IGP a pair of BGP route reflectors for route propagation, and a few dozens of MPLS-TE tunnels for specific tactical traffic engineering requirements. The customer's engineering department has some questions about the use of the Overload Bit in the IS-IS networks and how it could be used to improve their current network design. Which two concepts about the Overload Bit are true? (Choose two.)

Show Suggested Answer Hide Answer
Suggested Answer: A, D

by Aretha at Jun 15, 2025, 01:26 AM

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Gregoria
8 months ago
I thought E was a common practice, surprised to see it’s not recommended.
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Giuseppe
9 months ago
Wait, isn't D a bit misleading?
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Hyman
9 months ago
Totally agree, B is also correct!
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Fatima
9 months ago
C doesn’t sound right to me, what’s the source?
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Shalon
9 months ago
A is true, you can set it during startup.
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Carlene
9 months ago
I vaguely recall that the Overload Bit isn't recommended for BGP Route Reflectors, which might point to option E being true.
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Johnna
10 months ago
I practiced a similar question, and I feel like the Overload Bit is related to signaling convergence, so maybe option D is correct too.
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Delpha
10 months ago
I think option B sounds right because if the Overload Bit is set, it could make networks unreachable, but I need to double-check that.
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Anglea
10 months ago
I remember something about the Overload Bit being used during startup, but I'm not sure if it's for a fixed period or just until the router stabilizes.
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Marica
10 months ago
I remember learning about the Overload Bit in my routing protocols class. I think it's a good strategy to use it to temporarily avoid routing traffic through an overloaded node. But I'll need to double-check the specifics on how it works.
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Santos
11 months ago
The Overload Bit is used to signal that a router is in an overloaded state, right? I think it could be useful for the MPLS-TE tunnels, but I'm not sure how it would impact the BGP route reflectors.
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Corazon
11 months ago
Okay, let's see here. The Overload Bit can be set on a router during startup, and it can make networks advertised in the LSPs unreachable. I'm not sure about the other options though.
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Lennie
11 months ago
Hmm, the Overload Bit is a bit tricky. I'll need to think through the different use cases and how they might apply to this network setup.
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Sylvie
11 months ago
This question seems pretty straightforward, I think I've got a good handle on the Overload Bit in IS-IS networks.
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Maybelle
1 year ago
I believe setting the Overload Bit will make networks unreachable within the LSPs.
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Jani
1 year ago
Haha, I'd love to see option E in action. Imagine a BGP route reflector with the overload bit set - that's like a superhero trying to take a nap!
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Rodrigo
1 year ago
User2: I can't even imagine the consequences of setting the overload bit on a BGP route reflector!
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Reyes
1 year ago
User1: Option E would definitely cause some chaos in the network.
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Lucy
1 year ago
Yes, that's correct. It can also be set until other protocols have converged.
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Dannette
1 year ago
I'm not sure about option C. How would setting the overload bit force the midpoint MPLS-TE node to reoptimize the primary tunnels? That doesn't sound quite right to me.
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Dustin
1 year ago
I think options A and D are the correct answers. The overload bit can be set during the startup process for a fixed period of time, and it can also be set until other protocols have signaled convergence.
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Matthew
1 year ago
Yes, it can help manage traffic during network changes or failures.
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Moon
1 year ago
It's important to consider the impact on the network when using the overload bit.
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Dominque
1 year ago
Setting the overload bit during startup and until other protocols converge makes sense.
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Staci
1 year ago
I agree, option A and D seem to be the correct answers.
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Oliva
1 year ago
I think the Overload Bit can be set on a router during startup.
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