System Management
Basic System Configuration Guide 265
The g8265dot1-2010 profile is for use in an environment with only ordinary clock masters
and slaves for frequency distribution.
If the profile setting for the clock is g8275dot1-2014, the precedence order for the best master
selection algorithm is very similar to that used with the default profile. It ignores the
priority1 parameter, includes a localPriority parameter and includes the ability to force a
port to never enter slave state (master-only). The precedence is as follows:
• clock class
• clock accuracy
• PTP variance (offsetScaledLogVariance)
• priority2
• localPriority
• clock identity
• steps removed from the grandmaster
The ordinary clock master, ordinary clock slave, and boundary clock set their local
parameters as follows:
Table 34: Local Clock Parameters When Profile is set to: itu-telecom-freq
Parameter Value
clockClass 80-110 — value corresponding to the QL out of the central clock
as per Table 1/G.8265.1
255 — the clock is configured as ordinary clock slave
Table 35: Local Clock Parameters When Profile is set to: g8275dot1-2014
Parameter Value
clockIdentity Chassis MAC address following the guidelines of 7.5.2.2.2 of
IEEE 1588
clockClass 165 — local clock configured to a boundary clock and the
boundary clock was previously locked to a grandmaster with a
clock class of 6
248 — local clock configured as boundary clock
255 — local clock configured as ordinary clock slave
clockAccuracy FE — unknown
offsetScaledLogVariance FFFF — not computed
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