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Configuring Hybrid Mode and ESMC Quality Level Mapping

Configuring the Router in Hybrid Mode

1. Configure Synchronous Ethernet options at the [edit chassis synchronization] hierarchy level:
   • Configure the auto-select mode of operation. You can select the clock source either from a free-run local oscillator or from an external qualified clock.

     When the router is configured with the auto-select option, the router chooses up to two best upstream clock sources. It then uses the clock recovered from one of the sources to lock the chassis clock. If an upstream clock with acceptable quality is not available or if the router is configured in free-run mode, the router uses the internal oscillator.

   • Configure the esmc-transmit and network-option options at the [edit chassis synchronization hierarchy level.
   • Configure one or more interfaces at the [edit chassis synchronization] hierarchy level as Synchronous Ethernet sources as needed.

2. Configure PTP options at the [edit protocols ptp] hierarchy level.
3. Configure hybrid mode options at the [edit protocols ptp slave] hierarchy level.

Configuring Hybrid Mode with Mapping of the PTP Clock Class to the ESMC Quality Level

1. In configuration mode, go to the [edit protocols ptp slave] hierarchy level:
   [edit]user@host# edit protocols ptp slave
2. Configure the convert-clock-class-to-quality-level option to set the default mapping between the ESMC SSM quality level and the PTP clock class.
   [edit protocols ptp slave]user@host# set convert-clock-class-to-quality-level
3. Configure the hybrid mode option on the slave.
   [edit protocols ptp slave]user@host# edit hybrid
4. Configure the Synchronous Ethernet mapping option in hybrid mode.
   [edit protocols ptp slave hybrid]user@host# edit synchronous-ethernet-mapping
5. Configure the IP address of the clock source.
   [edit protocols ptp slave hybrid synchronous-ethernet-mapping]user@host# edit clock-source ip-address
6. Configure one or more Synchronous Ethernet source interfaces for the slave as needed.
   [edit protocols ptp slave hybrid synchronous-ethernet-mapping clock-source ip-address]user@host# set interface interface1-nameuser@host# set interface interface2-name

   Note: You must first configure these interfaces at the [edit chassis synchronization] hierarchy level as Synchronous Ethernet sources. For information about configuring these interfaces, see synchronization (MX Series).

Configuring Hybrid Mode with a User-Defined Mapping of the PTP Clock Class to the ESMC Quality Level

1. In configuration mode, go to the [edit protocols ptp slave] hierarchy level:
   [edit]user@host# edit protocols ptp slave
2. To override the default mapping option, perform the following steps:
   1. Configure the clock-class-to-quality-level-mapping option with one of the quality level values. The quality level values are prc, prs, sec, smc, ssu-a, ssu-b, st2, st3, st3e, st4, stu, and tnc.
      [edit protocols ptp slave]user@host# edit clock-class-to-quality-level-mapping quality-level prc | prs | sec | smc | ssu-a | ssu-b | st2 | st3 | st3e | st4 | stu | tnc
   2. Configure the clock-class option for the set quality level. The clock class value ranges from 80 through 109.
      [edit protocols ptp slave clock-class-to-quality-level-mapping quality-level quality-level-value]user@host# set clock-class clock-class

3. Configure the hybrid mode option on the slave.
   [edit protocols ptp slave]user@host# edit hybrid
4. Configure the Synchronous Ethernet mapping option in hybrid mode.
   [edit protocols ptp slave hybrid]user@host# edit synchronous-ethernet-mapping
5. Configure the IP address of the clock source.
   [edit protocols ptp slave hybrid synchronous-ethernet-mapping]user@host# edit clock-source ip-address
6. Configure one or more Synchronous Ethernet source interfaces for the slave as needed.
   [edit protocols ptp slave hybrid synchronous-ethernet-mapping clock-source ip-address]user@host# set interface interface1-nameuser@host# set interface interface2-name

   Note: You must first configure these interfaces at the [edit chassis synchronization] hierarchy level as Synchronous Ethernet sources. For information about configuring these interfaces, see synchronization (MX Series).

For information about verifying the aforementioned procedure, see Example: Configuring Hybrid Mode and ESMC Quality Level Mapping.