You want to configure a redundant trunk group on a switch. You want ge-0/0/0.0 to be the default
link; however, if ge-0/0/0.0 fails and the switch begins using ge-0/0/1.0, you want the switch to
continue using ge-0/0/1.0 until ge-0/0/1.0 fails. Which configuration will accomplish this scenario?
A.
redundant-trunk-group {
interface ge-0/0/0.0 {
primary;
}
interface ge-0/0/1.0 {
primary;
}
}
B.
redundant-trunk-group {
interface ge-0/0/0.0;
interface ge-0/0/1.0;
no-preempt;
}
C.
redundant-trunk-group {
interface ge-0/0/0.0 {
primary;
}
interface ge-0/0/1.0;
}
D.
redundant-trunk-group {
interface ge-0/0/0.0;
interface ge-0/0/1.0;
}
Explanation:
According to Juniper JNCIS-ENT fast track guide: “If primary knob is omitted, highest-numbered interface initially becomes active link but does not preemt lower-numbered interfaces functioning as the active link in failure and recovery scenarios”. So if you choose D then ge-0/0/1.0 will become active first and that’s not right according to the statement… the statement’s wrong or the answer’s wrong. Cheers.
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The question is not phrased correctly or the answers are not right.
From Junos Enterprise switching O’Reilly book;
“It is possible to create a non-revertive RTG group by removing the primary flag. This takes some planning, as the software will always set the interface with the higher in- terface value to be the active link:
[edit ethernet-switching-options] lab@Brandy# show redundant-trunk-group {
group dual { interface ge-0/0/1.0;
}
interface ge-0/0/3.0;
Without the primary knob, ge-0/0/3 becomes the active link as before, but with the absence of the primary flag in the State field:”
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