System Command Reference
406 Basic System Configuration Guide
Description This command enables the context to configure parameters for the second timing reference. There are
restrictions on the source-port and source-bits locations for ref2 based on the platform. The restrictions
on the location for the source-port or source-bits for ref1 and ref2 are listed in Table 42.
revert
Syntax [no] revert
Context config>system>sync-if-timing
Description This command allows the clock to revert to a higher priority reference if the current reference goes
offline or becomes unstable. When the failed reference becomes operational, it is eligible for selection.
When the mode is non-revertive, a failed clock source is not selected again.
Default no revert
source-bits
Syntax source-bits slot/mda
no source-bits
Context config>system>sync-if-timing>ref1
config>system>sync-if-timing>ref2
Description This command configures the source bits for the first (ref1) or second (ref2) timing reference. This
command is only applicable to the 7750 SR-c12 chassis. There are restrictions on the source-bits
location for ref1 and ref2 based on platform. Refer to the description of the ref1 command for details.
Parameters slot/mda — Specifies the chassis slot and MDA containing the BITS port to be used as one of the
two timing reference sources in the system timing subsystem.
Values slot:1
mda:1 to 12
source-port
Syntax source-port port-id
no source-port
Context config>system>sync-if-timing>ref1
config>system>sync-if-timing>ref2
Description This command configures the source port for timing reference ref1 or ref2. If the port is unavailable
or the link is down, then the reference sources are re-evaluated according to the reference order
configured in the ref-order command.
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