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Q9. Which of the following describes what happens when facility backup fast reroute is enabled for a LSP? Choose three answers.
A. Each PLR will signal a bypass tunnel that avoids the next-hop node or link.
B. When a failure occurs, the PLR will push an additional label onto the label stack and start forwarding traffic onto its bypass tunnel.
C. The ingress router will include a RRO object in the path message to indicate the routers that should be PLRs and MPs along the protected path.
D. The ingress router will set the local protection desired flag in the session attribute object of the path message to inform all routers along the protected LSP path to establish bypass tunnels.
E. When the bypass tunnel is in use, the MP will include the RRO object in its PathErr message, with the local protection in use flag set to notify the ingress router that it is using the bypass tunnel.
Answer: A,B,D
Q10. When configuring an LSP for fast reroute one-to-one protection, which of the following statements is true?
A. The LSP can also use facility backup.
B. The LSP is limited to node protection.
C. You cannot request bandwidth on the protected LSP.
D. Node protection can be disabled.
Answer: D
Q11. Which of the following are functions of the MPLS control plane in a router?
(Choose two)
A. Label allocation and management.
B. Label swapping.
C. Pushing a label on an unlabeled packet.
D. Label signaling.
E. Routing lookups.
Answer: A,D
Q12. Which of the following is a primary cause of IP hyper-aggregation?
A. IP routing protocols do not always select the best route to a destination.
B. IP routing protocols always select multiple routes to a destination.
C. IP routing protocols do not make use of all available network attributes to select a path
D. Improper network design results in limited network path redundancy.
Answer: C
Q13. Which one of the following statements regarding the detour object transported in the detour path message is true?
A. The PLR sends it downstream with the RRO.
B. The PLR sends it downstream with the ERO.
C. It associates all detours with the source PLR.
D. The MP sends it upstream with the RESV message.
Answer: B
Q14. Which of the following routing protocols are supported on the Alcatel-Lucent 7750 SR to enable constraint-based LSPs? (Choose two)
A. RIPv2-TE
B. CSPF
C. OSPF-TE
D. ISIS-TE
E. RSVP-TE
Answer: C,D
Q15. Which of the following statements best describes downstream unsolicited label distribution?
A. An LER may answer requests for label mappings immediately, without waiting for a label mapping from the next-hop.
B. An LER may advertise label mappings to all peers for which it might be a next-hop for a given FEC.
C. An LER propagates a label mapping downstream for a FEC. only if it has a label mapping for the FEC next-hop.
D. An LER will only distribute a label for a FEC when it has been requested to do so.
Answer: B
Q16. Which of the following statements regarding admin groups is FALSE?
A. Admin groups can be configured using the command "configure>router>mpls>admin-group".
B. CSPF uses the information defined by admin groups when paths are computed for constraint- based LSPs.
C. By default, interfaces for which MPLS has been enabled are in the default admin group.
D. A LSP can make use of admin groups for constraint-based path calculations by including or excluding the admin group
Answer: C