clock max-out-ssm

Function

The clock max-out-ssm command configures the maximum output SSM level for clock signals.

The undo clock max-out-ssm command deletes the maximum output SSM level configured for clock signals.

By default, no maximum output SSM level is configured for clock signals. That is, the actual output SSM level is used.

Format

clock 2msync-1 max-out-ssm { prc | ssua | ssub | sec }

undo clock 2msync-1 max-out-ssm

clock max-out-ssm { prc | ssua | ssub | sec | prtc | eprtc | esec | eprc }

undo clock max-out-ssm

Parameters

Parameter	Description	Value
prc	Indicates that the SSM level is PRC (G.811 clock signal).	-
ssua	Indicates that the SSM level is SSUA (G.812 transit node clock signal).	-
ssub	Indicates that the SSM level is SSUB (G.812 local node clock signal).	-
sec	Indicates that the SSM level is SEC.	-
2msync-1	Specifies the maximum output SSM level for 2M synchronous PLL clocks.	-
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).	-

Views

System view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
clksync	write

Usage Guidelines

Usage Scenario

If the device transmits poor-quality clock signals to a downstream device, run the clock max-out-ssm command to configure a low maximum output SSM level for clock signals. If SSM levels are also configured to participate in clock source selection on this downstream device, there is a low probability that this downstream device traces this clock source.

If the SSM level of clock signals is higher than the configured maximum output SSM level, the NetEngine 8000 F automatically adjusts the output SSM level to the configured maximum output SSM level. If the SSM level of clock signals is lower than or equal to the configured maximum output SSM level, the NetEngine 8000 F uses the actual output SSM level.

Precautions

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

Example

# Set the maximum output SSM level to ssua for clock signals.

<HUAWEI> system-view
[~HUAWEI] clock max-out-ssm ssua