An SMPTE-2059-2 network typically uses the BMC algorithm to dynamically establish the master-slave hierarchy. For different types of devices on an SMPTE-2059-2, the corresponding functions need to be configured.
Usage Scenario
The first step of establishing an SMPTE-2059-2 network is to import time signals from an external BITS clock source. The BMC algorithm can be used to select the grandmaster clock and master clock from SMPTE-2059-2 devices. Alternatively, the grandmaster clock and master clock can be manually configured. On a dynamic SMPTE-2059-2 network, clock source selection is implemented by comparing priorities to ensure the precision of clock signals to the maximum extent.
Pre-configuration Tasks
Set physical parameters of interfaces so that the interfaces are physically Up.
Run the license active file-name command to activate the clock synchronization license file on the master MPU. If the clock synchronization license file is not loaded, the ptp enable command is not allowed to be configured.
Importing Time Signals from an External BITS Source
This section describes how to import time signals from an internal BITS source. On an SMPTE-2059-2 network, time signals are typically imported from an external building integrated timing supply system (BITS) source. Multiple routers can be configured to import time signals from an external BITS source before determining the master clock.
Configuring Clock Source Attributes Used for Dynamic BMC Selection
This section describes how to configure clock source attributes used for dynamic BMC selection. SMPTE-2059-2 devices configured with clock source attributes can participate in BMC selection. The local clock on a SMPTE-2059-2 device can also participate in BMC selection. The BMC algorithm helps SMPTE-2059-2 devices dynamically determine the grandmaster clock which provides time signals for the entire SMPTE-2059-2 network. SMPTE-2059-2 devices can obtain clock synchronization information from the grandmaster clock through the SMPTE-2059-2 protocol.
Globally Enabling SMPTE-2059-2
This section describes how to globally enable SMPTE-2059-2. SMPTE-2059-2 needs to be enabled in both the system view and interface view. After SMPTE-2059-2 is enabled in the system view, configure basic device information, such as the domain name and virtual clock ID, required for setup of an SMPTE-2059-2 network.
(Optional) Configuring Access Control for SMPTE-2059-2 Clock Sources
This section describes how to configure access control for SNMPTE-2059-2 clock sources. On a large SMPTE-2059-2 clock synchronization network, lots of devices may participate in dynamic clock source selection. In this case, a malicious clock attack or configuration error may cause clock flapping on the entire network. You can enable the control access for SMPTE-2059-2 clock sources so that the system selects a clock source within a specified range.
(Optional) Monitoring the Performance of a Passive Interface
This section describes how to monitor the performance of a passive interface. After an SMPTE-2059-2 network achieves stable time synchronization, monitor the offset between the master and slave clocks on the passive interface.
Enabling SMPTE-2059-2 on an Interface
This section describes how to enable SMPTE-2059-2 on an interface. SMPTE-2059-2 needs to be enabled in both the system view and interface view. After being globally enabled in the system view, SMPTE-2059-2 also needs to be enabled on an interface. The parameters to be set in the interface view include the link delay measurement mechanism, asymmetric delay correction time, and timestamping mode.
(Optional) Configuring Time Attributes for SMPTE-2059-2 Packets
This section describes how to configure time attributes for SMPTE-2059-2 packets. SMPTE-2059-2 nodes exchange Announce, Sync, and Delay or Pdelay packets to send time information and maintain SMPTE-2059-2 connections. You can set the interval at which an SMPTE-2059-2 interface sends Announce, Sync, and Delay or Pdelay packets and the maximum number of Announce packet timeouts. Using the default time attribute values is recommended.
(Optional) Configuring an SMPTE-2059-2 Packet Encapsulation Mode
This section describes how to configure an SMPTEe -2059-2 packet encapsulation mode. SMPTE-2059-2 packets can be encapsulated into Layer 3 packets for transmission. Select the encapsulation type based on networking environments and configure the source and destination IP addresses and transmission priority.
Verifying the SMPTE-2059-2 Configuration
After configuring SMPTE-2059-2 functions, verify the configuration.
For more information:
https://support.huawei.com/enterprise/en/doc/EDOC1100125843/a68a1d9f/configuring-smpte-2059-2
