Juniper CTP Series User Manual

Table 53: CTP Bundle Adaptive Clocking Settings in the CTP Menu (continued)
Your ActionFunctionField
Enter a number from 3 through 300
seconds.
Specifies the time period during normal
adaptive clocking during which packet
samples that are experiencing the least
delay through the network are collected.
These samples are used for maintenance
state calculations.
MNTN Seconds/Calc
Enter a number from 1 through 100
packets per minute.
Specifies the number of packets per
minute, which when reached, causes the
adaptive clocking algorithm to change
from aggressive state to maintenance
state. Lower values result in longer
switchover times with a clock value
closer to the remote clock.
Slope for MNTN in ppm
Enter a number from 2 through 120
seconds.
Specifies how quickly the clocking
corrects to the buffer set point while in
maintenance state.
Maintenance Decay in calcs
Enter a number from 1 through 1000
parts per billion.
Specifies a cap for frequency
acceleration, which constrains the
frequency adjustments to the adaptive
clock.
Max Clock Adjust in ppb
Enter a number from 1 through 400
packets per minute.
Specifies a cap for frequency velocity,
which constrains the frequency velocity
of the adaptive clock.
Max Clock Offset in ppm
Enter a number from 100 through
1,000,000  seconds.
Specifies the buffer error rate required to
change the adaptive clocking algorithm
state from maintenance to aggressive.
Max Buffer Error in usec
Related
Documentation
Adaptive Clocking Overview for CTP Bundles on page 7•
Network Node Reference Overview
Network node reference (NetRef) is an extension of the CTP adaptive port clocking.
NetRef can be used to provide node level synchronization across a network. NetRef is
supported in CTPOS release 5.4R1 and later.
NetRef operates in two modes.
•
Primary or backup operation— When NetRef is configured for primary or backup
operation, the primary node sends clocking information to the backup node. The backup
node uses an algorithm similar to that used for adaptive port clocking to control the
local node clock so that it follows the clocking of the remote node. To operate in primary
or backup mode, the remote primary node must be configured as a NetRef primary
node with the IP address of the NetRef slave configured. The backup node must be
Copyright © 2018, Juniper Networks, Inc.118
Using Bundles to Create Logical Configurations for Physical Interfaces, CTP Release 7.3, CTPView Release 7.3

Juniper CTP Series Specifications

General

Brand	Juniper
Model	CTP Series
Category	Server
Language	English