Which command prevents Layer 2 loops if the switch stops receiving spanning-tree keepalives on port ge-1/0/1?
A.
[edit protocols rstp]
user@switch# show
interface ge-1/0/1 {
bpdu-block;
}
B.
[edit protocols layer2-control]
user@switch# show
interface ge-1/0/1 {
bpdu-time-out-action {
block;
alarm;
}
}
C.
[edit protocols layer2-control]
user@switch# show
bpdu-block {
interface ge-1/0/1;
}
D.
[edit protocols rstp]
interface ge-1/0/1
{
no-root-port;
}
i think the correct answer is B.
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any ideas?
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There is no command bpdu-time-out-action ; it would be bpdu-timeout-action.
But the first thing is to understand the different Loop protection mechanism; even though they can be problematic in remembering you really should just read up more on Junipers website. This is one of the easiest questions because any configuration with bpdu-block, is saying it should NOT receive any bpdu’s; if received, then take action. This question is, it should always be receiving bpdu’s and if it stops then take action. So the only correct answer would be D. I should encourage you guys to take the courses. layer2-control is not even covered in the courses for this exam.
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