Configuring The Clock Source Protection - Huawei OptiX OSN 550 Configuration Manual

2 Creating the Network
Procedure
Step 1 In the NE Explorer, select an NE and choose Configuration > Clock > Physical Layer
Clock > Clock Source Priority from the Function Tree.
Step 2 Click Query to query the existing clock source.
Step 3 Click Create. In the Add Clock Source dialog box, select a new clock source and click OK.
Step 4 Optional: If an external clock source is selected, select External Clock Source Mode according
to the type of external clock signals. In the case of the 2 Mbit/s clock, specify the Synchronous
Status Byte to deliver the SSM message.
Step 5 Select a clock source and click
sources are arranged in the descending order. The clock source at top is the preferred clock
source for the NE.
NOTE
Step 6 Click Apply. Then, click Close in the Operation Result dialog box indicating that the operation
succeeded.
NOTE
----End

2.7.2 Configuring the Clock Source Protection

On a complicated clock network, you need to configure the clock protection for all the NEs.
After you set the clock source and specify the clock priority level for the NEs, you can enable
the standard SSM or extended SSM protocol to prevent the NEs from tracing an incorrect clock
source.
Prerequisite
You must be an NM user with "NE operator" authority or higher.
Procedure
Step 1 In the NE Explorer, select an NE and choose Configuration > Clock > Physical Layer
Clock > Clock Subnet Configuration from the Function Tree.
Step 2 Click the Clock Subnet tab. Click Query to query the existing parameter settings.
Step 3 Select Start Standard SSM Protocol or Start Extended SSM Protocol.
NOTE
Step 4 Set the subnet number of the clock subnet to which the NE is associated.
2-22
Internal clock sources have the lowest priority because of their low precision.
If the clock trace relation changes according to the change of the clock source, the Prompt dialog box is
displayed, asking you whether to refresh the clock trace relation. Click OK. If Disable Prompting Next
Time is selected, the Prompt dialog box is not displayed even if the clock trace relation changes.
The same SSM protection protocol must be used for the NEs within the same clock protection subnet.
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OptiX OSN 550 Multi-Service CPE Optical Transmission
or to adjust its priority level. The clock
System
Configuration Guide
Issue 02 (2011-06-30)