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Last Modified: February 7, 2020

This property provides the Clock ID of the currently selected grandmaster for this clock.

The Grandmaster Clock ID is returned as a string of eight octets. Each octet consists of two hexadecimal (0-9, A-F) digits. The octets are separated by colon. For example, 00:80:2F:AB:CD:EF:00:01

Data type: datatype_icon

Long Name: Interface:Ethernet:Time Sync:Grandmaster Clock ID

Class: XNET Session

Permissions: Read

For the Protocol of IEEE Std 802.1AS-2011, this property corresponds to the grandmasterIdentity attribute, specified in 14.4.3 of IEEE Std 802.1AS-2011. This property also uses the gmPresent Boolean specified in of IEEE Std 802.1AS-2011. If gmPresent is True, this property returns the Clock ID of the grandmaster. If gmPresent is False, this property returns the Clock ID of the XNET Interface. If grandmaster information has not been received (e.g., Protocol Enabled is False, or BMCA is disabled and the slave does not receive announce messages), this property returns the invalid value of all zeroes.

Where This Property Is Available:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application

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