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NE40E-M2 V800R010C10SPC500 Configuration Guide - System Management 01

This is NE40E-M2 V800R010C10SPC500 Configuration Guide - System Management
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Example for Configuring Hybrid Network Clock Synchronization

Example for Configuring Hybrid Network Clock Synchronization

On a hybrid clock synchronization network, enabling extensive Synchronization Status Message (SSM) function can prevent clock loops.

Networking Requirements

As show in Figure 7-4, this is a hybrid clock synchronization network of ring network and chain network. Device A, Device B and Device C are in the same ring clock synchronization network. Device A directly connects the external building integrated timing supply system (BITS). Device C directly connects Device D that belongs to another chain clock synchronization network.

In this hybrid network, each device synchronizes the best quality clock signals from BITS when the BITS clock is normal. When a fault occurs on BITS, all devices switch to trace the clock signals from the chain clock synchronization network to which Device D belongs. The extensive SSM function is enabled on the network to solve the problem of clock loops.

Figure 7-4 Networking diagram of configuring hybrid network clock synchronization
NOTE:

The configurations in this example are performed on Device A, Device B, Device C, and Device D. HUAWEI NE40E-M2 Series can function as Device A, Device B, Device C, and Device D.

Interfaces 1, 2 and 3 in this example are GE 0/1/0, GE 0/2/0, GE 0/3/0, respectively.



Precautions

None

Configuration Roadmap

The configuration roadmap is as follows:

  1. Configure the mode of clock synchronization, and enable extensive SSM function.
  2. Configure clock sources.

Data Preparation

To complete the configuration, plan each Router's clock source priority and clock ID, as listed in Table 7-2.

Table 7-2 Clock source priority and Clock ID of each Router

Router

Clock Source in Use

Priority

Clock ID

DeviceA

BITS0

1

1

GE0/1/0

-

2

GE0/2/0

3

3

DeviceB

GE0/1/0

1

4

GE0/2/0

2

5

DeviceC

GE0/1/0

2

8

GE0/2/0

3

7

GE0/3/0

-

6

DeviceD

GE0/1/0

1

9

Procedure

  1. Enable extensive SSM function.

    # Configure Device A.

    <HUAWEI> system-view
    [~HUAWEI] sysname DeviceA
    [*HUAWEI] commit
    [~DeviceA] clock extend-ssm-control on
    [*DeviceA] commit

    # Configure other devices by using the same method for configuring Device A.

  2. Configure clock sources.

    # Configure Device A.

    [*DeviceA] clock bits-type bits0 2mbps
    [*DeviceA] clock source bits0 priority 1
    [*DeviceA] clock source bits0 clock-id 1
    [*DeviceA] commit
    [~DeviceA] quit
    [~DeviceA] interface gigabitethernet 0/1/0
    [*DeviceA-GigabitEthernet0/1/0] clock synchronization enable
    [*DeviceA-GigabitEthernet0/1/0] clock clock-id 2
    [*DeviceA-GigabitEthernet0/1/0] commit
    [~DeviceA-GigabitEthernet0/1/0] quit
    [~DeviceA] interface gigabitethernet 0/2/0
    [*DeviceA-GigabitEthernet0/2/0] clock synchronization enable
    [*DeviceA-GigabitEthernet0/2/0] clock priority 3
    [*DeviceA-GigabitEthernet0/2/0] clock clock-id 3
    [*DeviceA-GigabitEthernet0/2/0] commit

    # Configure Device B.

    [~DeviceB] interface gigabitethernet 0/1/0
    [*DeviceB-GigabitEthernet0/1/0] clock synchronization enable
    [*DeviceB-GigabitEthernet0/1/0] clock priority 1
    [*DeviceB-GigabitEthernet0/1/0] clock clock-id 4
    [*DeviceB-GigabitEthernet0/1/0] commit
    [~DeviceB-GigabitEthernet0/1/0] quit
    [~DeviceB] interface gigabitethernet 0/2/0
    [*DeviceB-GigabitEthernet0/2/0] clock synchronization enable
    [*DeviceB-GigabitEthernet0/2/0] clock priority 2
    [*DeviceB-GigabitEthernet0/2/0] clock clock-id 5
    [*DeviceB-GigabitEthernet0/2/0] commit

    # Configure Device C.

    [~DeviceC] interface gigabitethernet 0/2/0
    [*DeviceC-GigabitEthernet0/2/0] clock synchronization enable
    [*DeviceC-GigabitEthernet0/2/0] clock priority 1
    [*DeviceC-GigabitEthernet0/2/0] clock clock-id 6
    [*DeviceC-GigabitEthernet0/2/0] commit
    [~DeviceC-GigabitEthernet0/2/0] quit
    [~DeviceC] interface gigabitethernet 0/2/0
    [*DeviceC-GigabitEthernet0/2/0] clock synchronization enable
    [*DeviceC-GigabitEthernet0/2/0] clock priority 3
    [*DeviceC-GigabitEthernet0/2/0] clock clock-id 7
    [*DeviceC-GigabitEthernet0/2/0] commit
    [~DeviceC-GigabitEthernet0/2/0] quit
    [~DeviceC] interface gigabitethernet 0/1/0
    [*DeviceC-GigabitEthernet0/1/0] clock synchronization enable
    [*DeviceC-GigabitEthernet0/1/0] clock priority 2
    [*DeviceC-GigabitEthernet0/1/0] clock clock-id 8
    [*DeviceC-GigabitEthernet0/1/0] commit

    # Configure Device D.

    [~DeviceD] interface gigabitethernet 0/1/0
    [*DeviceD-GigabitEthernet0/1/0] clock synchronization enable
    [*DeviceD-GigabitEthernet0/1/0] clock priority 1
    [*DeviceD-GigabitEthernet0/1/0] clock clock-id 9
    [*DeviceD-GigabitEthernet0/1/0] commit
    [~DeviceD-GigabitEthernet0/1/0] quit

Configuration Files

  • Configuration file of Device A

    #
     sysname DeviceA
    #
     clock extend-ssm-control on
     clock bits-type bits0 2mbps
     clock source bits0 clock-id 1
    #
    interface GigabitEthernet0/1/0
     clock synchronization enable
     clock clock-id 2
    #
    interface GigabitEthernet0/2/0
     clock synchronization enable
     clock priority 3
     clock clock-id 3
    #
    return 
  • Configuration file of Device B

    #
     sysname DeviceB
    #
     clock extend-ssm-control on
    #
    interface GigabitEthernet0/1/0
     clock synchronization enable
     clock priority 1
     clock clock-id 4
    #
    interface GigabitEthernet0/2/0
     clock synchronization enable
     clock priority 2
     clock clock-id 5
    #
    return 
  • Configuration file of Device C

    #
     sysname DeviceC
    #
     clock extend-ssm-control on
    #
    interface GigabitEthernet0/1/0
     clock synchronization enable
     clock priority 2
     clock clock-id 8
    #
    interface GigabitEthernet0/2/0
     clock synchronization enable
     clock priority 3
     clock clock-id 7
    #
    interface GigabitEthernet0/3/0
     clock synchronization enable
     clock clock-id 6
    #
    return 
  • Configuration file of Device D

    #
     sysname DeviceD
    #
     clock extend-ssm-control on
    #
    interface GigabitEthernet0/1/0
     clock synchronization enable
     clock priority 1
     clock clock-id 9
    #
    return 
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Updated: 2019-01-02

Document ID: EDOC1100058392

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