— Exhibit –
— Exhibit —
Refer to the Exhibit.
Your network has multiple LSPs between Router A and Router B, as shown in the exhibit. You add
a new LSP between these routers with the following parameters:
LSP5: 20 Mbps; Priority 4 3
Assuming no link has 20 Mbps available, which LSP will be preempted by LSP5?
A.
LSP1
B.
LSP2
C.
LSP3
D.
LSP4
Explanation:
Why not answer B?
Setup <= Hold
7 7 << can be preempted
5 4 << can be preempted
4 3
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For preemption to occur, the setup priority of the new LSP must be higher than that of the existing LSP
https://www.juniper.net/documentation/en_US/junos12.3/topics/usage-guidelines/mpls-configuring-priority-and-preemption-for-lsps.html
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For preemption to occur,the setup priority of the new LSP mulst be higher then the hold priority of the existing LSP.
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I think two possible answers B & D but since they ask for one LSP “which LSP (not LSPs) will be preempted by LSP5?”
[edit protocols mpls label-switched-path jncip]
root# set priority 4 ?
Possible completions:
Reservation priority (0..7)
[edit protocols mpls label-switched-path jncip]
root# set priority 4
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