Configuring the Unicast Negotiation Function for a Server

The unicast negotiation function and parameters for a connection between a client and a clock server are configured on the router functioning as a 1588 ACR clock server.

Context

ACR, which is an adaptive clock recovery technology, allows a 1588 ACR client to exchange 1588v2 packets with a clock server on a link where a 1588v2-incapable device resides. After receiving 1588v2 packets, the client uses clock information carried in the packets to restore clock information.

1588 ACR client and 1588v2 (which implements hop-by-hop clock synchronization) are mutually exclusive. If 1588 ACR is enabled on a 1588v2-capable device, the 1588v2 configurations on the device no longer take effect. The 1588 ACR server and 1588v2 can be both configured on the device.

Procedure

Run system-view
The system view is displayed.
Run ptp-adaptive enable
1588 ACR is enabled.
Run ptp-adaptive device-type server
The 1588 ACR clock working mode is set to server.
(Optional) Run ptp-adaptive frequency profile
The 1588 ACR-enabled device to totally comply with ITU-T G.8265.1 is configured.

After the ptp-adaptive frequency profile command is run, the default domain value changes to 4. The domain value range changes to 4-23.
(Optional) Run ptp-adaptive domain domain-value
A 1588 ACR domain is configured.

The client and clock server, which exchange 1588 ACR packets for clock synchronization, must be in one 1588 ACR clock domain.
Run ptp-adaptive local-ip ip-address
An IP address is assigned to the clock server.

The clock server's and client's IP addresses uniquely identify a 1588 ACR connection, which is set up by exchanging Layer 3 unicast packets between a client and a clock server during negotiation. Configuring a loopback address as the server's IP address is recommended, helping the clock server direct packets to the client.
(Optional) Run ptp-adaptive vpn-instance vpn-name
The VPN instance name carried in 1588v2 packets is specified, which identifies the VPN instance bound to the server's loopback interface.
Run ptp-adaptive { acr [ one-way | two-way ] | atr } unicast-negotiate enable
The 1588 ACR unicast negotiation on the device is configured.
Run commit
The configuration is committed.