Nokia 7210 Configuration Manual page 472

System Management
Platforms Supported on all 7210 SAS platforms as described in this document, including platforms
configured in the access-uplink operating mode; not supported on 7210 SAS platforms
configured in the standalone-VC operating mode
Description This command specifies that the selection of system timing reference and BITS output timing
reference (if available on the platform) takes into account quality level. This command turns-
on or turns-off SSM encoding as a means of timing reference selection.
Default no ql-selection
ref-order
Syntax ref-order first second third [fourth] [fifth]
ref-order ptp
no ref-order
Context config>system>sync-if-timing
Platforms Supported on all 7210 SAS platforms as described in this document, including platforms
configured in the access-uplink operating mode; not supported on 7210 SAS platforms
configured in the standalone-VC operating mode
Description This command organizes the priority order of the timing references. The synchronous
equipment timing subsystem can lock to different timing reference inputs, those specified in
the ref1, ref2 and ptp command configuration.
If a reference source is disabled, the clock from the next reference source as defined by ref-
order is used. If all reference sources are disabled, then clocking is derived from a local
oscillator.
If a sync-if-timing reference is linked to a source port that is operationally down, the port is
no longer qualified as a valid reference. Depending on the platform used, either SFP or Fixed
copper ports can be used as a reference.
Note:
472
• On the 7210 SAS-M, if PTP is specified as reference, the other reference cannot be
specified as syncE. That is, use of PTP and syncE as a reference is mutually exclusive.
• On the 7210 SAS-T, 7210 SAS-Mxp, 7210 SAS-R6, and 7210 SAS-R12, all three
timing references can be enabled at the same time. In other words, it is allowed to
specify the syncE and PTP references simultaneously. Only syncE and BITS are
allowed as a reference.
• The third, fourth, and fifth parameters are not supported on the 7210 SAS-M.
• The 7210 SAS-Sx 1/10GE (standalone) only supports the first and second parameters
and it is allowed to specify the syncE and PTP references simultaneously.
• The7210 SAS-S 1/10GE (standalone and standalone-VC) and 7210 SAS-Sx 10/
100GE (standalone-VC) only support first and second parameters.
Use subject to Terms available at: www.nokia.com
7210 SAS-M, T, R6, R12, Mxp, Sx, S Basic System
© 2021 Nokia.
Configuration Guide
3HE 17358 AAAB TQZZA