Enabling PTP on a Network Port

After you configure PTP globally on a device, you must enable PTP on the required network ports. You can also use the fanout ports to configure PTP. Once you have enabled PTP on a port, you cannot use the port for any other services such as maps. To configure PTP on a network port:

1.

On the left navigation pane, click , and then select Physical > Nodes.

2.

In the Physical Nodes page, click the required cluster ID for which you want to configure timestamp.

3.

On the left-navigation pane, go to Ports > Ports > All Ports.

4.

Select a network port on which you want to enable PTP, and then click Edit.

5.

Scroll down to the PTP section, and then select the Enable check box.

6.

In the Local Priority field, enter a priority value that will be used to determine the PTP source leader in a bidirectional clock relationship (formerly master) when the BMC algorithm chooses more than one clock as the source. This value overrides the default criteria for the BMC selection. The clock with the lower priority value will be selected.

For example, on a particular device, the local priority of a port is compared with the local priority of the clock. Based on the following criteria, the source is determined:

o

If the local priority of the port is greater than the local priority of the clock, the clock becomes the source.

o

If the local priority of the port is lesser than the local priority of the clock, the port becomes the source.

o

If the local priority of the port is equal to the local priority of the clock, the clock identity of the port and the clock is compared and the one that has the lower value becomes the source.

The valid range is between 1 and 255. The default is 128.

7.

From the Role drop-down list, select one of the following options:

o

Source—The port will act as the source with which all the connected ports with receiver follower in a bidirectional clock relationship (formerly slave) role will be synchronized.

o

Follower—The port will act as the receiver and will be synchronized with the source port to which it is connected.

o

Standard—The BMC algorithm will determine the port’s role as source or receiver.

Note:  The default is Standard.

8.

In the Announce Interval field, enter the time interval, in seconds on a logarithmic scale, between PTP announce messages in the port. The valid range is between -3 and 4 log seconds. The default is -3.

9.

In the Delay Request Interval field, enter the minimum interval allowed between PTP delay request messages. The valid range is between -7 and 0 log seconds. The default is -4.

10.

In the Sync Interval field, enter the time interval between PTP synchronization messages on the port. The valid range is between -7 and 0 log seconds. The default is -4.

11.

In the VLAN field, enter the PTP VLAN value for the port. The valid range is between 2 and 4000. The VLAN ID would be allocated based on availability of the VLAN resource. Hover over the help icon to know about the available VLAN resources that can be allocated.

12.

Click OK to save the configuration.