EtherHaul Operation, Administration and Maintenance Manual
Page 99
In wireless link the compensation of the PDV needs to be done for the entire link
including the air interface and not only per node.
Siklu’s 1588 Transparent Clock (TC) implements one step end to end HW time stamping
and distributed TC algorithm to synchronize the two ends of the link. The accuracy level
of the synchronization correction field between the two sides is <100ns and complies
with the most stringent accuracy level required (accuracy class level 6) on all of the
Ethernet ports.
IEEE 1588 is a licensed feature that requires license for operation. Before configuring it,
verify that license is available and enable the
synce
license.
This section allows configuring the following parameters:
Checkbox to enable /disable the feature (default disabled).
Operational Status – Read Only field. Will be Up if the 1588 is configured
correctly on both sides and both sides time stamp counter are in sync.
Note that it can take up to 5 minutes till sync is achieved and operational status
will be Up.
PTP Encapsulation – ptp-over-ip or ptp-over-Ethernet.
Air Delay Correction – Manual correction of air delay (in nSec). Correction may
positive or negative.
Air Delay – Read Only field. Measured air delay (including modem delay) in nSec
by the system. Takes in account air-delay-correction.
Air Distance – Read Only field. Measured air distance in meters by the system.
Takes in account air-delay-correction (manually changing the air-delay
correction affects the air-distance).
Displayed as Link Length on the web-based management's
Main Page
.
Modified Packets Counter – The number of 1588 packets which passed through
the system and stamped. The counter is cleared upon reset (no option to clear it
manually).
Configuration and monitoring using the CLI:
Configuration:
set ieee1588 admin up air-delay-correction 0
Viewing status:
show ieee1588
