configure network-clock gptp ports announce

configure network-clock gptp ports [port_list {only} | all] announce [initial-interval log_2_interval | receipt-timeout timeout_count]

Description

Configures gPTP Announce parameters on the specified ports. Announce messages are used to elect the grandmaster clock and determine the time-synchronous spanning tree.

Syntax Description

port_list Specifies one or more of the switch's physical ports.
only Apply change only to specified port, even if port is master of a load sharing group.
all Specifies all of the switch's physical ports.
log_2_interval The interval between Announce messages used by the switch on the port when the port is initialized or when the switch receives a message interval request TLV with announceInterval value 126. This value is in log 2 seconds. The valid range of values is -3 (2-3 = 0.125 seconds) to 17 (217 = 131072 seconds).
timeout_count On a gPTP slave port, the number of announce intervals to wait without receiving an Announce message before assuming the master is no longer sending Announce messages.

Default

  • log_2_interval = 0 (1 second; 802.1AS-2011 10.6.2.2)
  • timeout_count = 3 (802.1AS-2011 10.6.3.2)

Usage Guidelines

Use this command to configure gPTP Announce parameters on the specified ports. Announce messages are used to elect the grandmaster clock and determine the time-synchronous spanning tree. Announce selects the grandmaster in the network and establishes the tree from the grandmaster to all other time-aware systems in the network.

initial-interval corresponds to 802.1AS parameter initialLogAnnounceInterval.

receipt-timeout corresponds to 802.1AS parameter announceReceiptTimeout.

Example

configure network-clock gptp ports 1-2 announce initial-interval 127
configure network-clock gptp ports all announce receipt-timeout 5 

History

This command was first available in ExtremeXOS 15.3.

Platform Availability

This command is available on Summit X450-G2, X460-G2, and X670-G2 switches if the AVB feature pack license is installed on the switch.