Nokia 7210 Configuration Manual page 285

7210 SAS-M, T, R6, R12, Mxp, Sx, S Basic System
Configuration Guide
Note: The following caveats apply to G.8275.1 support. See section
guidelines and restrictions.
When a 7210 SAS receives Announce messages from one or more configured peers
or multicast neighbors, it executes a Best Master Clock Algorithm (BMCA) to
determine the state of communication between itself and the peers. The system uses
the BMCA to create a hierarchical topology, allowing the flow of synchronization
information from the best source (the grandmaster clock) out through the network to
all boundary and slave clocks. Each profile has a dedicated BMCA.
If the profile setting for the clock is ieee1588-2008, the precedence order for the best
master selection algorithm is as follows:
The 7210 SAS sets its local parameters as described in
Table 35
If the profile setting for the clock is itu-telecom-freq (ITU G.8265.1 profile), the
precedence order for the best master selection algorithm is:
3HE 17358 AAAB TQZZA
• PTP with Ethernet encapsulation is only supported with G.8275.1 profiles.
• PTP over IP encapsulation is only with the IEEE 1588v2 and G.8265.1 profiles; it is not
supported for G.8275.1 profiles.
• priority1
• clock class
• clock accuracy
• PTP variance (offsetScaledLogVariance)
• priority2
• clock identity
• steps removed from the grandmaster
Local Clock Parameters When Profile is Set to ieee1588-2008
Parameter
clockClass
clockAccuracy
offsetScaledLogVariance
clockIdentity
Use subject to Terms available at: www.nokia.com
Value
248 – the 7210 SAS is configured as a boundary clock
255 – the 7210 SAS is configured as an ordinary clock slave
FE - unknown
FFFF – not computed
Chassis MAC address following the guidelines of section
7.5.2.2.2 of IEEE 1588-2008
© 2021 Nokia.
System Management
6.5.11 for configuration
Table 35.
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