Click the Exhibit button. On the network shown in the exhibit, a network administrator is
attempting to bring up an LSP between Boston and Seattle using administrative groups.
Which two of the following LSP configurations allow the LSP to establish? (Choose two.)
A.
Option D
B.
Option A
C.
Option B
D.
Option C
C,D
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Option C and D (A,D)
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Could someone explain why A, B or D options could be right?
A— “exclude red” breaks the path because prune the upper link (RED-White)
B— “include-all [Red white blue] ” All links are pruned because no link includes the red, white and blue colors
D— “include-any red” and ” include-all blue” each link considered in the SPF calculation must comply with both conditions. It means each link has to include red color AND each link has to include blue color. Just two links include red and blue colors, but it’s not enough to allow the LSP to establish.
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