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4A0-C01 · Question #419

Click on the exhibit. 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…

The correct answer is B. Both LSP-3 and LSP-4 take R1-R3-R5-R6. See the full explanation below for the reasoning.

Question

Click on the exhibit. 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?

Exhibit

4A0-C01 question #419 exhibit

Options

  • ABoth LSP-3 and LSP-4 take R1-R2-R4-R6.
  • BBoth LSP-3 and LSP-4 take R1-R3-R5-R6.
  • CLSP-3 takes R1-R3-R5-R6 and LSP-4 takes R1-R2-R4-R6.
  • DLSP-3 takes R1-R2-R4-R6 and LSP-4 takes R1-R3-R5-R6.
  • ECSPF randomly chooses one of the equal cost paths for the two LSPs.

How the community answered

(33 responses)
  • B
    82% (27)
  • C
    6% (2)
  • D
    3% (1)
  • E
    9% (3)

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