ExamGecko
Question list
Search
Search

List of questions

Search

Related questions











Question 3 - JN0-664 discussion

Report
Export

Which two statements are correct about a sham link? (Choose two.)

A.
It creates an OSPF multihop neighborship between two PE routers.
Answers
A.
It creates an OSPF multihop neighborship between two PE routers.
B.
It creates a BGP multihop neighborship between two PE routers.
Answers
B.
It creates a BGP multihop neighborship between two PE routers.
C.
The PEs exchange Type 1 OSPF LSAs instead of Type 3 OSPF LSAs for the L3VPN routes
Answers
C.
The PEs exchange Type 1 OSPF LSAs instead of Type 3 OSPF LSAs for the L3VPN routes
D.
The PEs exchange Type 3 OSPF LSAs instead of Type 1 OSPF LSAs for the L3VPN routes.
Answers
D.
The PEs exchange Type 3 OSPF LSAs instead of Type 1 OSPF LSAs for the L3VPN routes.
Suggested answer: A, C

Explanation:

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.

asked 18/09/2024
Ruben Dallibor
36 questions
User
Your answer:
0 comments
Sorted by

Leave a comment first