System Management
7210 SAS D, E, K OS Basic System Configuration Guide Page 329
Syntax [no] freq-source freq-source
Context config>system>ptp>clock
Description Platforms Supported: 7210 SAS-K only.
This command allows user to provide a stable frequency reference obtained through one of the line
references (for example: syncE, BITS) for PTP time recovery in PTP Hybrid mode. This is achieved
by the specifying the frequency source for PTP to be 'ssu'. This mode of operation where the PTP is
used only for time recovery and syncE or BITS used for frequency recovery is also known as PTP
Hybrid mode.
If set to ‘ssu’, then PTP is running in hybrid mode (if PTP is also no shutdown), using the recovered
frequency provided by the central clock through any of the configured references (could be either
syncE or BITS). When this parameter is set to ‘ssu’, PTP cannot be configured as a reference in the
ref-order. CLI will block such a configuration. The converse is also true, that is, if PTP is configured
under ref-order, then this parameter cannot be set to ‘ssu’.
If set to ‘ptp’, then PTP is running in pure mode, potentially being configured as a frequency
reference in ref-order.
NOTE: A change of value with this command requires a reboot to take effect after configuration
changes are saved.
The no form of this command sets it to the default value.
Default ptp
Parameters freq-source — Specifies if PTP is used for frequency and time recovery or only for time recovery. If
‘ptp’ is specified, then PTP is used for both frequency and time recovery. If ‘ssu’ is specified, PTP is
used only for time recovery.
ptp — If set to this value, PTP is running in pure mode, potentially providing frequency reference to
the system's central clock and also time to the system.
ssu — if set to 'ssu', PTP hybrid mode is in use, with the system's central clock providing the fre-
quency reference and PTP recovering only time.
clock-type
Syntax clock-type {{ordinary [slave]}
Context config>system>ptp
Description This command configures the type of clock. The clock-type can only be changed when ptp is
shutdown.
The clock-type cannot be changed to master-only if PTP reference is no shutdown. In addition,
clock-type cannot be changed to master-only if there are peers configured.
Default ordinary slave
Parameters ordinary — The clock is capable of being either a PTP grandmaster or slave.
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