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To configure the method to set the SSM quality level of a clock source:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Configure the method
to set the SSM quality
level of a clock
source.
•
In standalone mode:
network-clock source
{
bits0
|
bits1
|
lpuport
port-type port-number
|
ptp
}
forcessm
{
on
|
off
}
•
In IRF mode:
For BITS and PTP:
network-clock chassis
chassis-number
source
{
bits0
|
bits1
|
ptp
}
forcessm
{
on
|
off
}
For a link clock input port:
network-clock source lpuport
port-type port-number
forcessm
{
on
|
off
}
By default, the quality level of a
clock source is the user-defined
value. The network clock monitoring
module does not extract the quality
level from the SSM sent by the clock
source.
Keywords for the SSM control:
•
on
—Uses the SSM quality level
manually assigned.
•
off
—Extracts the SSM quality
level from the received timing
signal.
Specifying an SSM quality level for a clock source
The SSM quality level you specify for a clock source takes effect only when manual SSM quality level
assignment is enabled.
To specify an SSM quality level for a clock source:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Assign an SSM
quality level to a
clock source.
•
In standalone mode:
network-clock source
{
bits0
|
bits1
|
ptp
|
lpuport
port-type port-number
}
ssm
{
dnu
|
prc
|
sec
|
ssua
|
ssub
|
unknown
}
•
In IRF mode:
{
network-clock chassis
chassis-number
source
{
bits0
|
bits1
|
ptp
}
ssm
{
dnu
|
prc
|
sec
|
ssua
|
ssub
|
unknown
}
{
network-clock source lpuport
port-type
port-number
ssm
{
dnu
|
prc
|
sec
|
ssua
|
ssub
|
unknown
}
By default, all clock sources
use the
unknown
SSM
quality level.
DNU clock sources are
excluded from automatic
reference selection.
3.
(Optional.) Verify
that the
configuration is
effective.
display network-clock source
It takes time for the SSM
quality level change to take
effect. To verify the
effectiveness of the change,
use the
display
network-clock source
command or check the log.
Controlling the use of SSM in automatic reference selection
You can control the contribution of the SSM quality level to automatic reference selection.