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Configuring the Precision Time Protocol G.8275.2 Enhanced Profile (Telecom Profile)

 
Note

When you enable the G.8275.2 enhanced profile, you cannot enable any other profile.

Configuring Precision Time Protocol and Its Options

This topic includes the following tasks:

  1. Configuring PTP Options

  2. Configuring Slave Clock Options

  3. Configuring Master Clock Options

Configuring PTP Options

To configure PTP options:

  1. In configuration mode, go to the [edit protocols ptp] hierarchy level:
  2. Configure the clock mode as either boundary or ordinary. This attribute is mandatory and has no default value.

    The boundary option signifies that both master and client must be configured. The ordinary option signifies that only the master, or only the client, must be configured.

  3. Configure the profile type as g.8275.2.enh (the G.8275.2.enh profile type provides the telecom profile). This attribute is mandatory.
  4. (Optional) Configure the PTP domain option with a value from 44 through 63. The default value is 44.
  5. (Optional) Configure the priority2 option with values from 0 through 255. The default value is 128.

    The priority2 value differentiates and prioritizes the master clock to avoid confusion when priority1-value is the same for different master clocks in a network.

  6. Configure the unicast-negotiation option.

    Unicast negotiation is a method by which the announce, sync, and delay response packet rates are negotiated between the master clock and the client clock before a PTP session is established.

    Note

    Unicast negotiation, when enabled, does not allow you to commit any packet rate–related configuration.

Configuring Slave Clock Options

Configure the following options after the aforementioned PTP options have been set.

  1. Configure the client clock.
  2. (Optional) Configure the delay-request option in the client node. The range is -7 to -3 seconds, and the default values are -6 for the master and -7 for the client.

    The delay request value is the logarithmic mean interval in seconds between the delay request messages sent by the client to the master.

  3. Configure the interface for the client.
    Note

    You can configure an aggregated Ethernet interface and its configured IP address for PTP streams acting as slaves or masters.

    For example, to configure a client using an aggregated Ethernet interface:

    Note

    You can configure a loopback interface (there is only one loopback interface, and it is lo0.0) and its corresponding IP addresses for PTP streams acting as slaves or masters. Although the loopback interface is the same for both masters and slaves, the IP addresses must be unique.

    For example, to configure a client using the loopback interface:

  4. Configure the unicast-mode option for the client.
  5. Configure the transport option in unicast mode as IPv4 or IPv6.
  6. Configure the clock source and the IP address of the interface acting as the local PTP client port.
    Note

    You must configure this IP address at the [edit interfaces interface-name] hierarchy level.

  7. (Optional) Configure the priority assigned to the interface acting as the local PTP client port.

Configuring Master Clock Options

Configure the following options after the aforementioned PTP options and client clock options have been set.

  1. Configure the master clock.
  2. Configure the interface for the master.
    Note

    You can configure an aggregated Ethernet interface and its configured IP address for PTP streams acting as slaves or masters.

    For example, to configure a master using an aggregated Ethernet interface:

    Note

    You can configure a loopback interface (there is only one loopback interface, and it is lo0.0) and its corresponding IP addresses for PTP streams acting as slaves or masters. Although the loopback interface is the same for both masters and slaves, the IP addresses must be unique.

    For example, to configure a master using the loopback interface:

  3. Configure the unicast mode option for the master.
  4. Configure the transport option in unicast mode as IPv4 or IPv6.
  5. Configure the remote clock source and the IP address of the interface acting as the master.