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Outline switching principles for LSP linear protection. In another word, what conditi
ons may trigger the switching to happen？
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更多“Outline switching principles f…”相关的问题
A.Protection lock
B.Protection signal invalidatio
C.Clear switching
D.Manual switching
A.LOC alarm
B.Mismerge alarm
C.Forced switching command (FS)
D.Manual switching command (MS)
A.Label Switching Router
B.Label Swapping Router
C.Layer 3 Switching Router
D.Layer 2 Swapping Router
A.MPLS(Multiprotocol Label Switching)
B.Store and Forward存储转发
C.PWE3(Pseudo Wire Emulation Edge-to-Edge)
D.Fast-forward 快速转发
The babies would "smile and bubble" at the lights because ______.
A．the lights were directly related to some basic "drives"
B．the sight of the lights was interesting
C．they need not turn back to watch the lights
D．they succeeded in "switching on" the lights
A.NNI side lines of the devices at two ends are wrongly connecte
B.Time sync related configurations of the devices at two ends are incorrect.
C.MAC addresses of the devices at two ends are the sam
D.Clock source configurations of the two devices are incorrect.
B、SDH承载数据（Data over SDH）
C、波分承载数据（Data over WDM）
B.Whether work connection or protection connection is selected depends on some certain type of mechanism. To avoid single point failure, work connection and protection connection should take separate routes.
C.During the switching, APS is needed for negotiating two sides of the connection. Bidirectional 1:1 T-MPLS path protection should be revertive type.
D.1：1 T-MPLS path protection is bidirectional switching type. That is to say, connections in both affected or non-affected directions are switched to protection paths.
A.To display current alarm of device correctly, the device needs to report current alarm to EMS actively. Therefore, necessary configuration for the device to actively report alarms must be correctly set.
B. Protection switching event alarm occurs at the instant when protection group switching happens, so it is not durative alarm. Therefore, after the alarm occurs, it is immediately saved in locking alarm. You can check it only in the locking alarms.
C. If EMS server timezone is different from PTN device timezone, alarm occurrence time on PTN device will be different from that on EMS. Therefore, during commissioning of PTN, you should set PTN timezone to be consistent with EMS timezone, usually local timezone.
D. None of the above
