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All links have 1 Gbps unreserved bandwidth initially and all LSPs have the least-fill feature enabled. After the two LSPs have been signaled as shown, two additional LSPs are configured.
LSP-3 is signaled first with 50Mbps reserved. LSP-4 is signaled after with 400Mbps reserved.
Which paths will CSPF choose for LSP-3 and LSP-4?
Suggested Answer: B
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11 comments · newest first
VA
Valda
12 months ago
Randomly choosing? That sounds a bit off.
SI
Simona
12 months ago
Wait, how does CSPF decide between those paths?
HE
Helga
12 months ago
Definitely going with C for the paths.
SH
Shoshana
1 year ago
I think both should take R1-R3-R5-R6.
PA
Pansy
1 year ago
LSP-3 reserves 50Mbps, LSP-4 reserves 400Mbps.
DE
Detra
1 year ago
I feel like both LSPs might end up on the same path, but I can't remember if CSPF would allow that with the reservations in place.
KA
Katina
1 year ago
I practiced a similar question where LSPs had to share bandwidth, and I think LSP-4 would take the path that has more bandwidth left after LSP-3 is signaled.
SH
Sheldon
1 year ago
I remember that CSPF considers the available bandwidth when signaling LSPs, but I'm not sure how it prioritizes them in this scenario.
DA
Daniela
1 year ago
I think LSP-3 should take the path with less bandwidth reserved, but I can't recall if it goes for R1-R3-R5-R6 or R1-R2-R4-R6.
JE
Jerry
1 year ago
Hmm, this is a tricky one. I'm leaning towards the Exception Report as the best option, since it would allow the team to highlight the unexpected issues with the competitors and the potential impact on the company's position. But I'll need to double-check the details to be sure.
LE
Leoma
1 year ago
This looks like a tricky one. I'll need to think through the power parameter changes carefully to figure out the right answer.