Juniper Exam JN0-664 Topic 2 Question 48 Discussion

Actual exam question for Juniper's JN0-664 exam

Question #: 48
Topic #: 2

Exhibit

Referring to the exhibit, PIM-SM is configured on all routers, and Anycast-RP with Anycast-PIM is used for the discovery mechanism on RP1 and RP2. The interface metric values are shown for the OSPF area.

In this scenario, which two statements are correct about which RP is used? (Choose two.)

ASource2 will use RP2 and Receiver2 will use RP2 for group 224.2.2.2.

BSource2 will use RP1 and Receiver2 will use RP1 for group 224.2.2.2.

CSource1 will use RP1 and Receiver1 will use RP1 for group 224.1.1.1.

DSource1 will use RP1 and Receiver1 will use RP2 for group 224.1 1 1

Show Suggested Answer

Suggested Answer: A, C

A sham link is a logical link between two PE routers that belong to the same OSPF area but are connected through an L3VPN. A sham link makes the PE routers appear as if they are directly connected, and prevents OSPF from preferring an intra-area back door link over the VPN backbone. A sham link creates an OSPF multihop neighborship between the PE routers using TCP port 646.The PEs exchange Type 1 OSPF LSAs instead of Type 3 OSPF LSAs for the L3VPN routes, which allows OSPF to use the correct metric for route selection1.

by Lynsey at Apr 30, 2025, 11:12 PM

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