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H31-161 – HCIE - R&S written (Carrier IP)

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Showing 1–3 of 10 questions

Question 1

RTA is a leaf router that directly connects to host A through interface GigabitEthernet 1/0/0. The interface is configured as follows:

interface Ethernet1/0/0 undo shutdown

ip address 192.168.4.2 255.255.255.0

pim sm igmp enable

igmp version 3

igmp ssm-mapping enable

Configurations in the IGMP view are as follows:

igmp

ssm-mapping 233.1.1.0 255.255.255.0 10.10.1.1

A user sends an IGMPv2 Report message on host A to join groups 232.1.1.1 and 233.1.1.1 but the user cannot receive (10.10.1.1, 232.1.1.1) and (10.10.1.1, 233.1.1.1) messages. To solve this

problem, which of the following configurations are required?

Select all that apply, then click Submit answer.

  • ○

    Configure ssm-mapping 232.1.1.0 255.255.255.0 10.10.1.1 in the IGMP view.
  • ○

    Configure ssm-policy in the PIM view and use the ACL to set the SSM group address range to 233.1.1.1.
  • ○

    Configure ssm-policy in the PIM view and use the ACL to set the SSM group address range to 232.1.1.1.
  • ○

    Configure ssm-policy in the PIM view and use the ACL to set the SSM group address range to 232.1.1.1 and 233.1.1.1.
Question 2

Which of the following statements about TE FRR in forwarding adjacency (FA) mode and TE FRR in IGP Shortcut mode are true?

Select all that apply, then click Submit answer.

  • ○

    When TE FRR in FA mode is enabled, nodes except the node on which FA is configured can sense the TE tunnel interface. When the primary tunnel link becomes faulty, the PLR switches traffic to the bypass tunnel through protection switching. The upstream node assumes the TE tunnel link is normal and therefore it continues traffic forwarding. In this case, the route does not change and an FRR is not triggered.
  • ○

    When TE FRR in FA mode is enabled, nodes except the node on which FA is configured can sense the TE tunnel interface. When the primary tunnel link becomes faulty, the PLR switches traffic to the bypass tunnel through protection switching. The upstream node assumes the TE tunnel link changes and therefore it triggers an FRR.
  • ○

    When TE FRR in IGP Shortcut mode is enabled, nodes except the node on which FA is configured cannot sense the TE tunnel interface. When the primary tunnel link becomes faulty, the PLR switches traffic to the bypass tunnel through protection switching. On the PLR, traffic is still forwarded through the bypass tunnel. The upstream node of the PLR cannot sense the TE tunnel interface and does not trigger an FRR.
  • ○

    When TE FRR in IGP Shortcut mode is enabled, nodes except the node on which FA is configured cannot sense the TE tunnel interface. When the primary tunnel link becomes faulty, the PLR switches traffic to the bypass tunnel through protection switching. Though the upstream node of the PLR cannot sense the TE tunnel interface, IGP can sense the faulty link. Therefore, the upstream node triggers an FRR.
Question 3

When the RSVP LSP FRR protection is enables, which of the following statements about the original RSVP LSP are true?

Select all that apply, then click Submit answer.

  • ○

    The point of local repair (PLR) and the merge point (MP) can perceive the application of FRR but other nodes on the original RSVP LSP
  • ○

    The RESV message is sent by the MP to an upstream node through a bypass LSP after modified.
  • ○

    The PATH message is sent by the PLR to the MP through a bypass LSP after modified.
  • ○

    The MP sends the ResvTear message to the upstream node of the original RSVP LSP.