Which configuration change is needed for an IS-IS Level 1 adjacency between R1 and R2?

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Referring to the exhibit, which configuration change is needed for an IS-IS Level 1 adjacency between R1 and R2?
A. Configure the lo0 family ISO address 49.0002.0010.0042.0002.00 on R2
B. Configure the lo0 family ISO address 49.0002.0010.0042.0002.00 on R1
C. Enable Level 2 on R1’s ge-0/0/1 interface
D. Disable Level 2 on R2’s ge-0/0/1 interface

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One thought on “Which configuration change is needed for an IS-IS Level 1 adjacency between R1 and R2?”

  1. The correct answer is A.
    This is an L1 adjacency and therefore the two routers have to be in the same area.
    If you chose B, that would change the SysID. You’d still have an area mismatch.

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