6
Specifying an SSM quality level for a clock source
Restrictions and guidelines
The SSM quality level you specify for a clock source takes effect only when manual SSM quality
level assignment is enabled.
Procedure
1.
Enter system view.
system-view
2.
Assign an SSM quality level to a clock source.
In standalone mode:
network-clock source
{
bits0
|
bits1
|
lpuport
interface-type
interface-number
|
ptp
}
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
interface-type interface-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.) Display the operating state of the network clock monitoring module.
display network-clock source
It takes time for the SSM quality level change to take effect. To verify the effectiveness of the
change, you can also check the logs.
Controlling the use of SSM in automatic reference selection
Procedure
1.
Enter system view.
system-view
2.
Configure the use of SSM quality level in automatic reference selection.
In standalone mode:
network-clock ssmcontrol
{
off
|
on
}
In IRF mode:
network-clock chassis chassis-number ssmcontrol
{
off
|
on
}
To ignore the SSM quality level in clock reference selection, specify the
off
keyword. To use
the SSM quality level in clock reference selection, specify the
on
keyword.
By default, SSM quality level is ignored in the automatic reference selection process.
Setting a priority for a clock source
About the priority of a clock source
In an automatic reference selection process, the network clock monitoring module selects the
optimal clock as a reference from all available clock sources.
Restrictions and guidelines
The lower the priority value, the better the clock source.
