Configuring PTP for Frequency Synchronization

This section describes the configuration steps required to set up packet-based frequency synchronization with the IEEE 1588-2008 Precision Time Protocol (PTP).

Note: Using packet-based frequency synchronization (G8265.1 Profile) excludes the usage of time synchronization.

The two examples configure a Packet Master and a Packet Slave node for PTP-based frequency synchronization using the G.8265.1 Telecom profile. In Packet Master mode, the node distributes the clock signal of the Network Frequency Synchronization function. In Packet Slave mode, the node recovers frequency information from the PTP packets and presents the recovered clock as a candidate towards the Frequency Synchronization function.

In G.8265.1 profile, MINI-LINK TN operates as an Ordinary Clock and has one Clock Port configured over a transport VLAN (that is, SVLAN in provider mode, and CVLAN in customer bridge mode). The PTP messages are sent unicast with UDP/IPv4 over Ethernet encapsulation.

The interface/bridge port over which PTP packets enter or exit the node is not explicitly configured, but is determined by the VLAN topology and STP if applicable.

Note: Ensure that all member interfaces of the transport VLAN, over which the remote Packet Master or Slave is reachable, are PTP time stamping capable.

For a detailed overview of packet-based synchronization and PTP, see Network

Synchronization Guidelines, Reference [10].

4.1.1.5.1 Configuring PTP Protocol Settings for Packet Master Configure PTP Protocol Settings as follows:

1. In the Management Tree, right-click the NE and select Configure > Sync Standard > IEEE 1588 PTP Sync > Protocol Settings.

Figure 8 The PTP - Configure Protocol Settings Page with Example Settings for a Packet Master

2. Set the General parameters: • PTP Profile

• Device Type

• Message Transport Mode • Clock Role

• Domain

3. Set the Priority parameters: • Priority1

• Priority2

4. Set the Alarms and Notifications parameters: • Free Running Mode

• Traceability Lost • Hold Over Entered • Clock Protection Lost • Incompatible Hardware • Switch Parent Clock

5. Click Save on the Toolbar to apply the changes. 4.1.1.5.2 Configuring PTP Protocol Settings for Packet Slave

Configure PTP Protocol Settings as follows:

1. In the Management Tree, right-click the NE and select Configure > Sync Standard > IEEE 1588 PTP Sync > Protocol Settings.

Figure 9 The PTP - Configure Protocol Settings Page with Example Settings for a Packet Slave

2. Set the General parameters: • PTP Profile

• Device Type

• Message Transport Mode • Clock Role

3. Set the Priority parameters: • Priority1

• Priority2

4. Set the Alarms and Notifications parameters: • Free Running Mode

• Traceability Lost • Hold Over Entered • Clock Protection Lost • Incompatible Hardware • Switch Parent Clock

5. Click Save on the Toolbar to apply the changes. 4.1.1.5.3 Configuring PTP Clock Ports

Configure PTP Clock Ports as follows:

1. In the Management Tree, right-click the NE and select Configure > Sync Standard > IEEE 1588 PTP Sync > Clock Ports.

MINI-LINK Craft displays the PTP - Configure Clock Ports page.

2. Under Clock Ports, create a clock port or select an existing one to configure and set the following parameters:

• Name • Enable

• Protocol(Encapsulation Type) • Connected Bridge Port • VLAN ID • VLAN Priority • VLAN Tagging • Oper Status • Identity • State • IP Type

3. Set the IP Address parameters of the selected clock port: • IP Address

• Subnet Mask • Default Gateway • DSCP

4. Set the Customer VLAN parameters of the selected clock port: • Tagging

• C-VLAN ID • C-VLAN Priority

5. Click Save on the Toolbar to apply the changes. 4.1.1.5.4 Configuring PTP Interfaces

The configuration steps in this section are only required for RL-IME 102, 103, and 104 on NPU3 C and NPU3 D, if connected to an MMU2 D/H/K.

Configure PTP Interfaces as follows:

1. In the Management Tree, right-click the NE and select Configure > Sync Standard > IEEE 1588 PTP Sync > PTP Interfaces.

MINI-LINK Craft displays the PTP - Configure PTP Interfaces page.

Figure 11 The PTP - Configure PTP Interfaces Page

2. Set the desired Asymmetry Compensation value for each interface. 3. The timestamping capability for the single-link RL-IMEs 102, 103, and

104 can be assigned by selecting the PTP Supported check-box of the interface.

Note:

• The RL-IME must be assigned to a Packet Link and the corresponding WAN interface connected to a bridge port before PTP support can be enabled on it. For more information, see

Configuring Native Ethernet, Reference [5].

• Once PTP support is enabled, it is retained until the RL-IME is disconnected from the Packet Link.

• For RL-IMEs 100 and 101, on NPU3 C and NPU3 D, the system allocates timestamping capability automatically. 4. Click Set PTP Interfaces Supported.

If PTP support was changed, the NE performs a cold restart. 4.1.1.5.5 Configuring Unicast and Unicast Master for PTP Clock Port

Configure Unicast and Unicast Master for PTP Clock Port as follows:

1. In the Management Tree, right-click the NE and select Configure > Sync Standard > IEEE 1588 PTP Sync > Clock Ports.

MINI-LINK Craft displays the PTP - Configure Clock Ports page. 2. Under Operations, click Configure Unicast/Unicast Master.

MINI-LINK Craft displays the Clock Port - Configure Unicast/Unicast Master page.

Figure 12 The Clock Port - Configure Unicast/Unicast Master Page

3. Under Unicast Configuration, set the General parameters: • Query Interval

• Duration(sec)

• Wait to Restore(min)

4. Under Unicast Configuration, set the Announce Messages parameters: • Request Interval

• Numbers of Timeout

5. Under Unicast Configuration, set the Synchronized Messages parameters:

• Request Interval • Numbers of Timeout

6. Under Unicast Configuration, set the Delay Response Messages parameters:

• Request Interval • Numbers of Timeout

7. Under Unicast Masters, create a Unicast Master or select an existing one to configure and set the following parameters:

• Name • Protocol • IP Address • Gateway • Local Priority • Enable • Accessible • Clock ID • TSU Capable • Bridge Port • Address Type

8. Click Save on the Toolbar to apply the changes.

4.1.2 Managing Sync Sources

4.1.2.1 Adding a Sync Source

This section describes how to add a sync source. Different scenarios apply for Synchronous Ethernet, 2 MHz, and E1/STM-1/Sync over Radio Link.

Figure 16 Adding a PTP Clock as Sync Source

Add a sync source as follows:

1. In the Management Tree, right click the NE.

2. Select Configure > Sync Standard > Network Sync.

MINI-LINK Craft displays the Configure Network Sync page. 3. Under Sync Sources, click to add a new sync source.

Note: If there are less than four Sync Sources added on the list it is possible to add a new Sync Source.

4. In the new entry, set the new sync source as follows: • Set the Priority.

• Select the unit by choosing it in the Module.

• Select the interface of the unit by selecting it in the Interface. • Select the quality level by selecting it in the Assigned Quality.

Note: Set Assigned Quality when SSM Support is not available. • Specify Hold Off Time(ms) and Wait To Restore Time(s).

• Set Include Signal Degrade and Locked Out. 5. Select Save on the Toolbar to apply changes. 4.1.2.2 Deleting a Sync Source

Figure 17 shows how to delete a sync source.

Figure 17 Deleting a Sync Source

Delete a sync source as follows:

1. In the Management Tree, right click the NE.

2. Select Configure > Sync Standard > Network Sync.

MINI-LINK Craft displays the Configure Network Sync page.

3. Under Sync Sources, select the Sync Source that you want to removes. 4. Click to delete the sync source.

Note: To undo the deletion, click .

4.1.2.3 Modifying the Sync Source

Figure 18 shows how to modify a sync source.

Figure 18 Modifying a Sync Source

Modify a sync source as follows:

1. In the Management Tree, right click the NE.

2. Select Configure > Sync Standard > Network Sync.

MINI-LINK Craft displays the Configure Network Sync page, with a list of all previously defined Sync Source interfaces. The interface that currently acts as the active Sync Source is indicated in the list.

3. Under Sync Sources, Select the Sync Source that you want to modify. Note: There must be at least one Sync Source that is not Locked out 4. Click the columns in the selected Sync Source row and enter the new

values.

5. Select Save on the Toolbar to apply changes. 4.1.2.4 Switching the Sync Source

Change the sync source as follows:

2. Select Configure > Sync Standard > Network Sync.

MINI-LINK Craft displays the Configure Network Sync page with a list of all previously defined Sync Source interfaces. The interface that currently acts as the active Sync Source is indicated in the list.

3. Under Sync Sources, select the source that you want to be the sync source.

Note: Select a source other than the active Sync Source.

4. If the Sync Source is not locked out the system offers Forced and Holdover as switch options. If the active Sync Source is selected only the Holdover option is available.

5. Select switch option. For information about parameters see Configure

Network Sync page.

6. Select Save on the Toolbar to apply changes. 4.1.2.5 Clearing Switch Command

Clear a switch command as follows:

1. In the Management Tree, right click the NE.

2. Select Configure > Sync Standard > Network Sync.

MINI-LINK Craft displays the Configure Network Sync page with a list of all previously defined Sync Source interfaces. The interface that currently acts as the active Sync Source is indicated in the list. There are also information that the Forced switch and Holdover switch is enabled. Note: To clear a switch command a Forced switch or Holdover switch

must be active

3. Click Clear to disable the switch command. The page is updated with the new information and displays it accordingly.