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NE20E-S2 V800R010C10SPC500 Configuration Guide - System Management 01

This is NE20E-S2 V800R010C10SPC500 Configuration Guide - System Management
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Configuring ACR

Configuring ACR

This part describes the configuration procedure of ACR.

Usage Scenario

Adaptive Clock Recovery (ACR) are two types of clock synchronization technologies. The clock accuracy of ACR is affected by the Packet Switched Network (PSN). If network clocks are asynchronous, ACR can be used to restore service clocks.

According to the clock transparent transmission mode, clock synchronization technologies can be classified into CES and TOP. In CES mode, clock signals are transparently transmitted through TDM from the master clock to the slave clock; in TOP mode, clock signals are transmitted through a PW from the master clock to the slave clock. Currently, Huawei devices support CES-ACR for clock synchronization.

As shown in Figure 8-1, in ACR mode, the downstream slave clock recovers the clock signals from the upstream master clock. In this case, you need to configure a clock recovery domain.

Figure 8-1 Networking diagram of ACR/DCR clock synchronization

Pre-configuration Tasks

Before configuring ACR, complete the following tasks:

NOTE:

When configuring ACR, ensure that the master and slave devices are equipped with the subcard supporting CES ACR.

  • Configuring link layer protocol parameters and IP addresses for interfaces to ensure that the link layer protocol on each interface is Up

  • Configuring static routes or an IGP to ensure reachable routes between nodes

  • Ensuring that the E1 card is installed in the device before configuring ACR

Procedure

  1. Run system-view

    The system view is displayed.

  2. Configure a clock recovery domain on the slave device that needs to restore clock signals.

    # If the device is installed with the E1 card, perform the following operations:

    1. Run controller e1 controller-number

      The CE1 interface view is displayed.

    2. Run clock recovery-domain domain-value

      The clock recovery domain for the CE1 interface is configured.

    3. Run commit

      The configuration is committed.

    # If the device is installed with the CPOS card, perform the following operations:

    1. Run controller cpos cpos-number

      The CPOS interface view is displayed.

    2. Run e1 e1-numberset clockrecovery-domain domain-value

      The clock recovery domain for the E1 tunnel is configured.

    3. Run commit

      The configuration is committed.

  3. (Optional) Configure the clock signal restored using ACR as the system clock on the slave device that needs to restore clock signals.
    1. Run clock source cesacr slot slot-id card card-id recovery-domain domain-value ssm ssm-value }clock source cesacr slot slot-id card card-id recovery-domain domain-value clock-id clock-idclock source cesacr slot slot-id card card-id recovery-domain domain-value priority priority-value

      Clock source attributes are configured for the clock recovery domain, and the recovered clock signal is used as the system clock.

      The SSM level for a CES ACR clock source is set.

      The clock ID for a CES ACR clock source is set.

      The priority for a CES ACR clock source is set.

    2. (Optional) Run clock { manual | force } source cesacr slot slot-id card card-id recovery-domain domain-value

      A clock selection mode is set and the master clock source is specified.

      The clock selection mode can be either manual or automatic.

    3. Run commit

      The configuration is committed.

Checking the Configuration

# If the ACR function on the router works normally, you can run the display acr-dcr command to view the current ACR information.

<HUAWEI> display acr-dcr slot 1 card 1
PW INFO
 domain:1,master pw SerialPort:0,master pw channel id:0
 domain:2,master pw SerialPort:0,master pw channel id:0
 domain:3,master pw SerialPort:0,master pw channel id:0
 domain:4,master pw SerialPort:0/1/1:0,master pw channel id:4
 domain:5,master pw SerialPort:0,master pw channel id:0
 domain:6,master pw SerialPort:0,master pw channel id:0
 domain:7,master pw SerialPort:0,master pw channel id:0
 domain:8,master pw SerialPort:0,master pw channel id:0

# View ACR information of clock recovery domain 4 on subcard 1 of slot 1.

<HUAWEI> display acr-dcr slot 1 card 1 recovery-domain 4
  Domain info
  ----------------------------------------------------------
  E1 count:  2
  Master PW SerialPort:Serial0/1/1:0,    Channel ID:4
  Master PW state: wait

  E1 info
  ----------------------------------------------------------
  E1 number:1,   Port:E1 0/1/1,   Direction:2,   PW count:1
      PW SerialPortName:Serial0/1/1:0,   Channel ID:4

  E1 number:0,   Port:E1 0/1/0,   Direction:2,   PW count:0

Configuring Clock Recovery Domain

This part describes the configuration procedure of ACR.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Configure a clock recovery domain on the slave device that needs to restore clock signals.

    # If the device is installed with the E1 card , perform the following operations:

    1. Run controller e1 controller-number

      The E1 interface view is displayed.

    2. Run clock recovery-domain domain-value

      The clock recovery domain for the E1 interface is configured.

    3. Run commit

      The configuration is committed.

    # If the device is installed with the CPOS card , perform the following operations:

    1. Run controller cpos cpos-number

      The CPOS interface view is displayed.

    2. Run e1 e1-number set clock recovery-domain domain-value

      The clock recovery domain for the E1 tunnel is configured.

    3. Run commit

      The configuration is committed.

Configuring CES ACR as the system clock

This part describes the configuration procedure of CES ACR.

Procedure

  1. (Optional) Configure the clock signal restored using ACR as the system clock on the slave device that needs to restore clock signals.
    1. Run clock source cesacr slot slot-id card card-id recovery-domain domain-value ssm ssm-value }clock source cesacr slot slot-id card card-id recovery-domain domain-value clock-id clock-idclock source cesacr slot slot-id card card-id recovery-domain domain-value priority priority-value

      Clock source attributes are configured for the clock recovery domain, and the recovered clock signal is used as the system clock.

      The SSM level for a CES ACR clock source is set.

      The clock ID for a CES ACR clock source is set.

      The priority for a CES ACR clock source is set.

    2. (Optional) Run clock { manual | force } source cesacr slot slot-id card card-id recovery-domain domain-value

      A clock selection mode is set and the master clock source is specified.

      The clock selection mode can be either manual or automatic.

    3. Run commit

      The configuration is committed.

Verifying the ACR Configuration

Prerequisites

After configuring ACR, verify the configuration.

Procedure

  1. Run the display acr-dcr command to view the current CES ACR information.

Example

Run the display acr-dcr slot slot-id card card-id [ recovery-domain recovery-domain-value ] command to view the current CES ACR information.

<HUAWEI> display acr-dcr slot 1 card 1 recovery-domain 4
  Domain info
  ----------------------------------------------------------
  E1 count:  2
  Master PW SerialPort:Serial0/1/1:0,    Channel ID:4
  Master PW state: wait

  E1 info
  ----------------------------------------------------------
  E1 number:1,   Port:E1 0/1/1,   Direction:2,   PW count:1
      PW SerialPortName:Serial0/1/1:0,   Channel ID:4

  E1 number:0,   Port:E1 0/1/0
,   Direction:2,   PW count:0
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Updated: 2019-01-02

Document ID: EDOC1100055400

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