QUESTION: 53

Which of the following regarding MPLS label value assignment is FALSE?

Label values may be dynamically assigned by LDP.
Label values may be dynamically assigned by RSVP-TE.
Label values may be reserved for special uses.
Label values may be dynamically assigned by IGP.

Answer(s): D

Click on the exhibit.

An LDP tunnel is established on router R1 towards router R6. The link between routers R2 and R4 goes down. What will happen to the MPLS data traffic to router R6 IMMEDIATELY after the link goes down?

MPLS data traffic will be discarded until the IGP finds a new next-hop to router R3.
MPLS data traffic will be discarded unless the LDP tunnel has a standby secondary path.
MPLS data traffic will not be discarded because router R1 received labels from both next-hops, routers R2 and R3.
MPLS data traffic will not be discarded because of fast reroute capability on router R2.

Answer(s): B

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QUESTION: 55

Which of the following about the Isp-ping command on the Nokia 7750 SR is FALSE?

An echo request is sent based on the LSP's label stack.
Echo reply packets may not take the same path as the LSP.
The IP destination address is used to initiate echo requests,
The test fails if the LSP is not operationally up.

Answer(s): C

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QUESTION: 56

Click on the exhibit.

LSP 1's link between routers R3 and R6 has failed, and the RESV state at router R3 has timed out. Which of the following actions will router R3 initiate?

Send a PathTear message towards router R6.
Send a PathTear message towards router R1.
Send a ResvTear message toward router R6.
Send a ResvTear message toward router R1.

Answer(s): D

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