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4A0-C01 · Question #436

Click on the exhibit. Initially, all links along the path R1-R2-R4-R6 have 400Mbps unreserved bandwidth and all links along the path R1-R3-R5-R6 have 800Mbps unreserved bandwidth. Shared Explicit…

The correct answer is C. LSP-1 will stay on R1-R2-R4-R6 because there is enough bandwidth on the existing path. See the full explanation below for the reasoning.

Question

Click on the exhibit. Initially, all links along the path R1-R2-R4-R6 have 400Mbps unreserved bandwidth and all links along the path R1-R3-R5-R6 have 800Mbps unreserved bandwidth. Shared Explicit reservation style is used and Make-Before-Break is enabled. Both fully loose LSPs have been signaled as shown. Later, the configured bandwidth for LSP-1 is changed to 400Mbps. Which of the following is TRUE?

Exhibit

4A0-C01 question #436 exhibit

Options

  • AAfter a new path for LSP-1 is established on R1-R3-R5-R6, the old path is torn down.
  • BAfter the old path for LSP-1 is torn down, the new path is established on R1-R3-R5-R6.
  • CLSP-1 will stay on R1-R2-R4-R6 because there is enough bandwidth on the existing path.
  • DLSP-1 will be torn down because CSPF fails to find a new path.

How the community answered

(30 responses)
  • A
    3% (1)
  • B
    10% (3)
  • C
    70% (21)
  • D
    17% (5)

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