Users Guide

broadcastdelay: 0.000000 s
authdelay: 0.000000 s
OS10# show ntp status vrf management
system peer: 1.1.1.2
system peer mode: client
leap indicator: 00
stratum: 4
precision: -23
root distance: 0.00027 s
root dispersion: 0.94948 s
reference ID: [1.1.1.2]
reference time: ddc78084.f17ea38b Tue, Nov 28 2017 6:28:20.943
system flags: ntp kernel stats
jitter: 0.000000 s
stability: 0.000 ppm
broadcastdelay: 0.000000 s
authdelay: 0.000000 s
OS10#
OS10# show ntp status vrf red
associd=0 status=0618 leap_none, sync_ntp, 1 event, no_sys_peer,
system peer: 11.0.0.2:123
system peer mode: client
leap indicator: 00
stratum: 10
log2 precision: -24
root delay: 0.338
root dispersion: 1136.790
reference ID: 11.0.0.2
reference time: dbc7a951.f7978096 Sat, Nov 5 2016 0:41:53.967
system jitter: 0.000000
clock jitter: 0.003
clock wander: 0.001
broadcast delay: -50.000
symm. auth. delay: 0.000
Supported
Releases
10.2.0E or later
Precision Time Protocol
Precision Time Protocol (PTP), defined in the IEEE1588-2008 standard, is a protocol that uses a master-slave hierarchy to
synchronize clocks on network devices. PTP uses hardware time stamping to achieve submicrosecond synchronization. PTP
defines how real-time clocks in a network synchronize with each other. A network where PTP operates is called a PTP domain.
This protocol operates by organizing clocks within a PTP domain into a master-slave hierarchy. The reference time for the entire
system comes from the root clock, also known as the grandmaster clock.
PTP is more accurate than NTP because it uses hardware timestamping. PTP also accounts for device latency while
synchronizing time. NTP synchronizes clocks with millisecond accuracy; PTP achieves submicrosecond accuracy.
OS10 supports PTP on all platforms that support hardware time stamping.
PTP-enabled devices consist of the following clock types:
Ordinary clock
A device with a single physical port is called an ordinary clock. This device could take on a master or slave
clock role.
NOTE: OS10 switch cannot function as the grandmaster clock and hence OS10 does not support the
ordinary clock configuration.
Boundary clock A device with multiple physical ports that synchronizes time from one network segment to another is
called a boundary clock. One port is a slave that synchronizes time from upstream PTP device. The other
ports are masters that distribute time to downstream devices. The best master clock algorithm (BMCA)
decides the individual state of a port, master or slave.
166 System management