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.
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:”