clock map unk

Function

The clock map unk command maps an SSM level to the clock source with an SSM level of unk. unk indicates that the clock source has an unknown SSM level.

By default, dnu is mapped to the clock source with an SSM level of unk. If SSM levels are configured to participate in clock source selection, the clock source with an SSM level of unk cannot participate in clock source selection.

Format

clock map unk { prc | ssua | ssub | sec | dnu | prtc | eprtc | esec | eprc }

Parameters

Parameter	Description	Value
prc	Indicates that the SSM level is PRC (G.811 clock signal).	-
ssua	Indicates that the SSM level is SEC.	-
ssub	Indicates that the SSM level is SSUA (G.812 transit node clock signal).	-
sec	Indicates that the SSM level is SSUB (G.812 local node clock signal).	-
dnu	Indicates that the signal should not be used for synchronization.	-
prtc	Indicates that the SSM level is PRTC (G.8272 clock signal).	-
eprtc	Indicates that the SSM level is EPRTC (G.8272.1 clock signal).	-
esec	Indicates that the SSM level is ESEC (G.8262.1 clock signal).	-
eprc	Indicates that the SSM level is EPRC (G.811.1 clock signal).	-
map	Indicates that the SSM level is not used for clock synchronization.	-

Views

System view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
clksync	write

Usage Guidelines

Usage Scenario

If the SSM level of an upstream clock source is unk, but you want the device to trace this upstream clock source, run the clock map unk command to map an SSM level higher than dnu to this upstream clock source.

The SSM levels in descending order are as follows:eprtc, prtc, eprc, prc, ssua, ssub, esec, sec, dnu.

In VS mode, this command is supported only by the admin VS.

Example

# Map ssua to the clock source with an SSM level of unk.

<HUAWEI> system-view
[~HUAWEI] clock map unk ssua