Alcatel Omni Switch/Router, User Manual

Page: 304 / 1100

NTP Statistics Menu
Page 12-26
Display Loop Filter Information
The loop filter is used to control and correct the phase of timestamps as processed by the
local clock. The loop filter examines timestamps sent to and from the local clock and can
adjust them to account for natural wander and jitter.
To view the statistics of the loop filter, enter the
ntploop
command at the system prompt. A
screen similar to the following is shown:
offset: 0.000000 s
frequency: 0.000 ppm
poll adjust: 0
watchdog timer: 0 s
All of these field variables are determined by the
NTP
algorithm
Field Descriptions
The following section describes the fields displayed using the
ntploop
command.
offset
. The currently estimated offset of this remote association, in seconds. This counter indi-
cates the offset of the peer clock relative to the local clock.
frequency
. A number indicating the local clock’s frequency in relation to a reference clock’s
Pulse per Second (
PPS
). If the clock is running in perfect synchronization, this number should
be 1. Otherwise, it will be slightly lower or higher in order to compensate for the time
discrepancy between the reference clock and the local clock.
poll adjust
. The number of times the poll time has been adjusted to conform to the network.
watchdog timer
. The number of seconds since the local clock for this client/server was last
adjusted.
Display Peer Memory Usage Statistics
The memory usage for the
NTP
information on the switch can be displayed using the ntpmem
command. To view memory information, enter the
ntpmem
command at the system prompt. A
screen similar to the following is shown:
time since reset: 0
total peer memory: 15
free peer memory: 11
calls to findpeer: 0
new peer allocations: 0
peer demobilizations: 0
hash table counts: 1 0 1 0 0 1 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0 0 0 1 0
Field Descriptions
The following section describes the fields displayed using the
ntpmem
command.
time since reset
. The number of seconds since the last reset of
NTP
(usually a reboot of the
switch).
total peer memory
. The total number of
NTP
associations possible for this switch.
free peer memory
. The number of available spots on this switch for
NTP
associations.