Question 1

4-A0-103-page112-image76

An LSP traverses R1-R2-R4-R6 and one-to-one fast reroute with link protection is enabled. All links have the

same cost. Which of the following about DMP and MP is TRUE?

Options :

A :

R3 and R5 become DMPs; R6 becomes MP.

B :

R3 and R5 become DMPs; R4 becomes MP.

C :

R3, R5, and R6 become DMPs; R4 becomes MP.

D : R1, R3, and R5 becomes DMPs; R4 and R6 become MPs.

Answer: A

Question 2

Using facility mode fast reroute, how does the PLR learn the address of the MP?

Options :

A : The PLR issues an RSVP PATH message to the tail-end requesting the address of the MP.

B : The PLR learns the address of the MP from the ERO

C : The PLR learns the address of the MP from the RRO.

D : The PLR learns the address of the MP from the targeted RSVP Hello message.

E : The PLR knows the address of the MP is the same as the tail-end router.

Answer: C

Question 3

Which of the following regarding label population is TRUE?

Options :

A : Selected labels from the FIB are populated to the LFIB.

B : Selected labels from the RIB are populated to the FIB.

C : Selected labels from the LIB are populated to the FIB.

D : Selected labels from the LIB are populated to the LFIB.

Answer: D

Question 4

Fill in the blanks: The device at the beginning of an LSP is referred to as the_________, and the device at the end of an LSP is referred to as the ___________.

Options :

A : PE, P

B : LER, LSR

C : LSR, LER

D : iLER, eLER

E : eLER, iLER

F : P, PE

Answer: D

Question 5

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 MakeBefore-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?

Options :

A : After a new path for LSP-1 is established on R1-R3-R5-R6, the old path is torn down.

B : After the old path for LSP-1 is torn down, the new path is established on R1-R3-R5-R6.

C : LSP-1 will stay on R1-R2-R4-R6 because there is enough bandwidth on the existing path.

D : LSP-1 will be torn down because CSPF fails to find a new path.

Answer: C

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