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play_arrow Overview
play_arrow Precision Time Protocol
- play_arrow Precision Time Protocol Overview
- play_arrow Precision Time Protocol Clocks
- play_arrow Precision Time Protocol Profiles
- play_arrow PHY Timestamping
- play_arrow Precision Time Protocol over Ethernet
- play_arrow Precision Time Protocol Additional Features
play_arrow Global Navigation Satellite System (GNSS)
- play_arrow GPS Systems on Routing Platforms
  - Global Positioning System (GPS) on Routing Platforms
- play_arrow Integrated GNSS on Routing Platforms
  - Integrated Global Navigation Satellite System (GNSS) on Routing Platforms
- play_arrow GNSS Configuration for Routers Using External GNSS Receiver
- play_arrow Assisted Partial Timing Support (APTS) on Routing Platforms
play_arrow Network Time Protocol
- play_arrow NTP Concepts
- play_arrow NTP Configuration Examples
play_arrow Synchronous Ethernet
- play_arrow Synchronous Ethernet Overview
- play_arrow Synchronous Ethernet on 10-Gigabit Ethernet MIC
  - Synchronous Ethernet on 10-Gigabit Ethernet MIC
  - Example: Configure Framing Mode for Synchronous Ethernet with 10-Gigabit Ethernet MIC
play_arrow Clock Synchronization
- play_arrow Clock Synchronization Concepts
- play_arrow Clock Synchronization for ACX Series Routers
  - Configure External Clock Synchronization for ACX Series Routers
- play_arrow Clock Synchronization for MX Series Routers
  - Configure External Clock Synchronization for MX Series Routers
- play_arrow Clock Synchronization for PTX Series Routers
  - Clock Sources for PTX Series Routers
  - Synchronize Internal Stratum 3 Clock to External Clock Sources on PTX Series Routers
- play_arrow Centralized Clocking
play_arrow Hybrid Mode
- play_arrow Hybrid Mode Overview
  - Hybrid Mode
  - Guidelines to Configure Hybrid Mode on ACX Series Routers
- play_arrow Hybrid Mode and ESMC Quality-Level Mapping
play_arrow Configuration Statements and Operational Commands
- Junos CLI Reference Overview
play_arrow Appendix
- Appendix - Inclusive Terms

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English

Configure Hybrid Mode and ESMC Quality Level Mapping

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You can configure hybrid mode (that is, the combined operation of Synchronous Ethernet and Precision Time Protocol (PTP)) on MX240, MX480, and MX960 Universal Routing Platforms and on MX80 Universal Routing Platforms with precision timing support (MX80-P) and with timing support (MX80-T). On the MX240, MX480, and MX960 routers, the combined operation is possible only when the PTP client and the Synchronous Ethernet source are on the same enhanced Modular Port Concentrator (MPC) and are traceable to the same primary. When acting as a PTP client, an MX80-P or MX80-T router can accept any external Synchronous Ethernet clock as reference. Note that when the selected Synchronous Ethernet reference fails, the router continues to work in PTP mode.

In hybrid mode, the synchronous Ethernet equipment clock (EEC) on the MPC derives the frequency from Synchronous Ethernet and the phase and time of day from PTP.

The hybrid mode is configured on the client. On the client, one or more interfaces are configured as Synchronous Ethernet source interfaces.

The ESMC quality level value is mapped to the clock class value either by mapping the PTP clock class to the ESMC quality level or by configuring a user-defined mapping of PTP clock class to ESMC quality level. For more information , see Understanding ESMC Quality Level Mapping. The following procedures explain configuring hybrid mode with either of the modes in detail.

Configuring the Router in Hybrid Mode

To configure the router in hybrid mode, you must:

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.
Configure PTP options at the [edit protocols ptp] hierarchy level.
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

To configure hybrid mode options with mapping of the PTP clock class to the ESMC quality level, perform the following steps:

In configuration mode, go to the [edit protocols ptp slave] hierarchy level:
```
[edit]
user@host# edit protocols ptp slave
```
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
```
Configure the hybrid mode option on the client.
```
[edit protocols ptp slave]
user@host# edit hybrid
```
Configure the Synchronous Ethernet mapping option in hybrid mode.
```
[edit protocols ptp slave hybrid]
user@host# edit synchronous-ethernet-mapping
```

Configure the IP address of the clock source.

content_copy zoom_out_map
[edit protocols ptp slave hybrid synchronous-ethernet-mapping]
user@host# edit clock-source ip-address

Configure one or more Synchronous Ethernet source interfaces for the client as needed.
```
[edit protocols ptp slave hybrid synchronous-ethernet-mapping clock-source ip-address]
user@host# set interface interface1-name
user@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

To configure hybrid mode options with a user-defined mapping of the PTP clock class to the ESMC quality level, perform the following steps:

In configuration mode, go to the [edit protocols ptp slave] hierarchy level:
```
[edit]
user@host# edit protocols ptp slave
```
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
Note:
In hybrid mode, the boundary node advertises the reference clock class value only after phase lock is achieved.
Configure the hybrid mode option on the client.
```
[edit protocols ptp slave]
user@host# edit hybrid
```
Configure the Synchronous Ethernet mapping option in hybrid mode.
```
[edit protocols ptp slave hybrid]
user@host# edit synchronous-ethernet-mapping
```

Configure the IP address of the clock source.

content_copy zoom_out_map
[edit protocols ptp slave hybrid synchronous-ethernet-mapping]
user@host# edit clock-source ip-address

Configure one or more Synchronous Ethernet source interfaces for the client as needed.
```
[edit protocols ptp slave hybrid synchronous-ethernet-mapping clock-source ip-address]
user@host# set interface interface1-name
user@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.

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Timing and Synchronization Guide

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Configure Hybrid Mode and ESMC Quality Level Mapping

Configuring the Router in Hybrid Mode

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

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

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Timing and Synchronization Guide

ON THIS PAGE

Configure Hybrid Mode and ESMC Quality Level Mapping

Configuring the Router in Hybrid Mode

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

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

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