JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing — Question 6
-- Exhibit --
user@R1> show
interfaces {
ge-1/1/0 {
unit 0 {
family inet {
address 10.100.1.1/30;
}
family iso;
}
}
lo0 {
unit 0 {
family inet {
address 10.100.10.1/32;
}
family iso {
address 49.1001.0010.0100.00;
}
}
}
}
protocols {
isis {
interface ge-1/1/0.0 {
level 2 disable;
}
interface lo0.0;
}
}
user@R2> show
interfaces {
ge-1/1/0 {
unit 0 {
family inet {
address 10.100.1.2/30;
}
}
}
lo0 {
unit 0 {
family inet {
address 10.100.10.2/32;
}
family iso {
address 49.1001.0010.0200.00;
}
}
}
}
protocols {
isis {
interface ge-1/1/0.0;
interface lo0.0;
}
}
-- Exhibit --
Click the Exhibit button.
Referring to the exhibit, R1 and R2 are directly connected using interface ge-1/1/0.
What happens as a result of the configurations?
Answer options
- A. No adjacency forms
- B. Level 2 adjacency forms
- C. Level 1 adjacency forms
- D. Level 1 and Level 2 adjacencies form
Correct answer: C
Explanation
The correct answer is C because R1 has its IS-IS level 2 disabled on interface ge-1/1/0, which prevents level 2 adjacencies from forming. Consequently, only level 1 adjacency can be established between the devices. Options A, B, and D are incorrect as they do not accurately describe the outcome of the given configurations.