User’s Manual of IGS-5225 series
274
Clock Default Data Set
The clock default data set is defined in the IEEE 1588 Standard. It holds three groups of data: the static members defined at
clock creation time, the Dynamic members defined by the system, and the configurable members which can be set here.
Object
Description
•
Device Type
Indicates the Type of the Clock Instance. There are five Device Types.
P2p Transp
- clock's Device Type is Peer to Peer Transparent Clock.
E2e Transp
- clock's Device Type is End to End Transparent Clock.
•
One-Way
If true, one way measurements are used.
This parameter applies only to a slave. In one-way mode no delay
measurements are performed, i.e. this is applicable only if frequency
synchronization is needed.
The master always responds to delay requests.
•
2 Step Flag
Static member: defined by the system, true if two-step Sync events and
Pdelay_Resp events are used
•
Ports
The total number of physical ports in the node
•
Clock Identity
It shows unique clock identifier
•
Dom
Clock domain [0..127].
•
Clock Quality
The clock quality is determined by the system, and holds 3 parts:
Clock Class
,
Clock Accuracy
and
OffsetScaledLog Variance
as defined in IEEE1588.
The Clock Accuracy values are defined in IEEE1588 table 6 (Currently the clock
Accuracy is set to 'Unknown' as default).
•
Pri1
Clock priority 1 [0..255] used by the BMC master select algorithm.
•
Pri2
Clock priority 2 [0..255] used by the BMC master select algorithm.
•
Local Prio
Priority [1..255] used in the 8275.1 BMCA.
•
Protocol
Transport protocol used by the PTP protocol engine
■
Ethernet
PTP over Ethernet multicast
■
EthernetMixed
PTP using a combination of Ethernet multicast and
unicast
■
IPv4Multi
PTP over IPv4 multicast
■
IPv4Mixed
PTP using a combination of IPv4 multicast and unicast
