Example for Configuring 1588 ACR Clock Synchronization in a Single-Server Scenario

This section describes how to configure 1588 ACR on the router functioning as a client and the router functioning as a server to restore clock information in a single-server scenario by using an example.

Networking Requirements

On the IP RAN shown in Figure 1, DeviceA functions as a clock server. DeviceC functions as a client, and sends a 1588 ACR Layer 3 unicast negotiation request to the server to achieve clock synchronization.

Figure 1 Networking diagram of configuring 1588 ACR clock synchronization in a single-server scenario

Configuration Roadmap

The configuration roadmap is as follows:

Configure DeviceA as a server.
Configure DeviceC as a client.
Adjust Layer 3 unicast negotiation parameters on the server and the client.
Configure unicast negotiation on the server and client.
On the client, configure a PTP clock reference source.

Data Preparation

To complete the configuration, you need the following data:

IP address of the server and the IP address of the client
Interval for sending Sync, Delay_Resp and Announce packets on the server

Procedure

Configure DeviceA as a server.

<DeviceA> system-view
[~DeviceA] interface loopback 0
[*DeviceA-Loopback0] ip address 1.1.1.1 32
[*DeviceC-Loopback0] commit
[~DeviceA-Loopback0] quit
[*DeviceA] ptp-adaptive enable
[*DeviceA] ptp-adaptive device-type server
[*DeviceA] ptp-adaptive local-ip 1.1.1.1
[~DeviceA] commit

Configure Device C as a client.

<DeviceC> system-view
[~DeviceC] interface loopback 0
[*DeviceC-Loopback0] ip address 2.2.2.2 32
[*DeviceC-Loopback0] commit
[~DeviceC-Loopback0] quit
[*DeviceC] ptp-adaptive enable
[*DeviceC] ptp-adaptive device-type client
[*DeviceC] ptp-adaptive local-ip 2.2.2.2
[*DeviceC] ptp-adaptive remote-server1-ip 1.1.1.1
[~DeviceC] commit

Adjust Layer 3 unicast negotiation parameters on the client and the server.

# Configure the client.

[*DeviceC] ptp-adaptive request sync-interval 4
[*DeviceC] ptp-adaptive request announce-interval 12
[*DeviceC] ptp-adaptive request delay-resp-interval 6
[*DeviceC] commit

Configure unicast negotiation on the server and client.

# Configure the server.

[*DeviceA] ptp-adaptive acr unicast-negotiate enable
[*DeviceA] commit

# Configure the client.

[*DeviceC] ptp-adaptive acr unicast-negotiate enable
[*DeviceC] commit

On the client, configure a PTP clock reference source.

[*DeviceC] clock source ptp synchronization enable
[*DeviceC] clock source ptp priority 1
[*DeviceC] clock source ptp ssm prc
[*DeviceC] commit

Verify the configuration.

# Check the 1588 ACR configuration on DeviceC.

<DeviceC> display ptp-adaptive all
 Device config info
 ---------------------------------------------------------------------------
 Ptp adaptive state      :enable         Device type        :client
 Sync mode               :frequency      Current state      :slave
 Packet dscp             :56             Domain value       :0
 Announce interval       :12             Announce duration  :300s
 Sync interval           :4              Sync duration      :300s
 Delay_resp interval     :6              Delay_resp duration:300s
 Announce receipt timeout:3              Acr mode           :one-way
 Local ip                :2.2.2.2        Client board       :3
 Frequency profile       :no
 VPN                     :none

 BMCA run info
 ---------------------------------------------------------------------------
 Current trace source    :server1
 Frequency lock success  :yes

 Time performance statistics(ns):
 ------------------------------------------------------------------------
 Realtime(T2-T1)         :987740873
 Max(T2-T1)              :987742555
 Min(T2-T1)              :987423502

 Remote server info
 ---------------------------------------------------------------------------
          Ip address        Negotiate state  Pri1 Class   Accuracy  Pri2
 Server1: 1.1.1.1           Nego success     128  6       0x34      128
 Server2:

# Check the 1588 ACR configuration on DeviceA.

<DeviceA> display ptp-adaptive all
 Device config info
 ---------------------------------------------------------------------------
 Ptp adaptive state      :enable         Device type        :server
 Sync mode               :frequency      Current state      :master
 Packet dscp             :56             Domain value       :0
 Local ip                :1.1.1.1        Server board       :3
 Frequency profile       :no
 VPN                     :none

 Client info
     ID  Ip Address        Clock ID          Mode    Announce  Sync  Delay_resp
 ---------------------------------------------------------------------------
 1   0   2.2.2.2           001882fffed48301  one-way 2         -6    none

Configuration Files

Configuration file of DeviceA

#
 sysname DeviceA
#
 ptp-adaptive enable
 ptp-adaptive device-type server
 ptp-adaptive local-ip 1.1.1.1
 ptp-adaptive acr unicast-negotiate enable
#
interface Loopback0
 ip address 1.1.1.1 255.255.255.255
# 
return

Configuration file of DeviceC

#
 sysname DeviceC
#
 ptp-adaptive enable
 ptp-adaptive device-type client
 ptp-adaptive local-ip 2.2.2.2
 ptp-adaptive remote-server1-ip 1.1.1.1
 ptp-adaptive request sync-interval 4
 ptp-adaptive request announce-interval 12
 ptp-adaptive request delay-resp-interval 6
 ptp-adaptive acr unicast-negotiate enable
 clock source ptp synchronization enable
 clock source ptp priority 1
 clock source ptp ssm prc
#
interface Loopback0
 ip address 2.2.2.2 255.255.255.255
# 
return