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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.)
Suggested Answer: A, D
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26 comments · newest first
GR
Gregoria
10 months ago
I thought E was a common practice, surprised to see it’s not recommended.
GI
Giuseppe
10 months ago
Wait, isn't D a bit misleading?
HY
Hyman
10 months ago
Totally agree, B is also correct!
FA
Fatima
11 months ago
C doesn’t sound right to me, what’s the source?
SH
Shalon
11 months ago
A is true, you can set it during startup.
CA
Carlene
11 months ago
I vaguely recall that the Overload Bit isn't recommended for BGP Route Reflectors, which might point to option E being true.
JO
Johnna
11 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.
DE
Delpha
11 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.
AN
Anglea
12 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.
MA
Marica
12 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.
SA
Santos
1 year 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.
CO
Corazon
1 year 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.
LE
Lennie
1 year 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.
SY
Sylvie
1 year ago
This question seems pretty straightforward, I think I've got a good handle on the Overload Bit in IS-IS networks.
MA
Maybelle
1 year ago
I believe setting the Overload Bit will make networks unreachable within the LSPs.
JA
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!
RO
Rodrigo
1 year ago
User2: I can't even imagine the consequences of setting the overload bit on a BGP route reflector!
RE
Reyes
1 year ago
User1: Option E would definitely cause some chaos in the network.
LU
Lucy
1 year ago
Yes, that's correct. It can also be set until other protocols have converged.
DA
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.
DU
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.
MA
Matthew
1 year ago
Yes, it can help manage traffic during network changes or failures.
MO
Moon
1 year ago
It's important to consider the impact on the network when using the overload bit.
DO
Dominque
1 year ago
Setting the overload bit during startup and until other protocols converge makes sense.
ST
Staci
1 year ago
I agree, option A and D seem to be the correct answers.
OL
Oliva
1 year ago
I think the Overload Bit can be set on a router during startup.