About This Chapter
With the time synchronization schemes provided in the T2000, you can correct the time for all NEs manually or automatically. The NE time accuracy is important for troubleshooting and networking monitoring, so the NE time synchronization must be set before service conguration.
Context
To ensure the NE time accuracy, you can set the NE time by the following schemes.
8.1 Time Synchronization Schemes for the T2000 and NEs
With the time synchronization function, the NE time is kept consistent with the T2000 server time. In this way, the T2000 is able to record the correct occurring time of alarms and abnormal events reported by NEs.
8.2 Synchronizing NE Time with the T2000 Server Automatically
After proper settings, the NE time can be synchronized with the T2000 server time
automatically. In this way, the time of alarms and logs can be correctly recorded in the T2000.
If the NTP service is not congured for the T2000 and NEs, make proper settings before service conguration so that the NE time can be synchronized with the T2000 server automatically.
8.3 Synchronizing NE Time with the T2000 Server Manually
For NEs without the NTP service congured, you are suggested to check whether the NE time is consistent with the T2000 server time. If not, synchronize the NE time with the T2000 server manually.
8.4 Synchronizing NE Time with the NTP Server
The Network Time Protocol (NTP) service can be used to keep NE time synchronized with the NTP server automatically. In theory, the accuracy of NE time can reach a nanosecond.
If NTP servers are congured in the network, set NTP time synchronization for NEs before service conguration.
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8.1 Time Synchronization Schemes for the T2000 and NEs
With the time synchronization function, the NE time is kept consistent with the T2000 server time. In this way, the T2000 is able to record the correct occurring time of alarms and abnormal events reported by NEs.
When NEs report alarms and abnormal events to the T2000, the occurring time of such alarms and events is based on the NE time. If the NE time is incorrect, then wrong occurring time of alarms is recorded in the T2000, which may cause troubles in fault location. The same case happens to the occurring time of abnormal events that are recorded in the NE security log.
To ensure the NE time accuracy, the T2000 provides two time synchronization schemes:
synchronizing with the T2000 server and synchronizing with the NTP server.
In the former scheme, all NEs use the T2000 server time as the standard time, and can be synchronized with the T2000 server manually or automatically. The T2000 server time refers to the time of the computer system where the T2000 server resides. This scheme features easy operation and applies to a network with relatively low requirement for time accuracy.
In the latter scheme, all NEs and the T2000 are synchronized with the NTP server
automatically. The NTP server can be either the T2000 server or a special time server. This scheme enables the T2000 and NEs to have a time accuracy of one nanosecond in theory, and applies to a network with very high requirement for time accuracy.
8.2 Synchronizing NE Time with the T2000 Server Automatically
After proper settings, the NE time can be synchronized with the T2000 server time
automatically. In this way, the time of alarms and logs can be correctly recorded in the T2000.
If the NTP service is not congured for the T2000 and NEs, make proper settings before service conguration so that the NE time can be synchronized with the T2000 server automatically.
Prerequisite
You must be an NM user with "NE and network operator" authority or higher.
Procedure
Step 1 Select Conguration > NE Time Synchronization from the Main Menu.
Step 2 Select the NEs in the left pane and click .
Step 3 Set the Synchronous Mode parameter to NM and click Apply.
Step 4 Click Close when the success prompt appears.
Step 5 Set the Synchronize Starting Time and Synchronization Period (days) parameters in the lower pane. Click Apply.
Step 6 Click OK when a conrmation dialog box is displayed.
Step 7 Click Close in the Operation Result dialog box.
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OptiX iManager T2000
Operator Guide 8 Setting NE Time
8.3 Synchronizing NE Time with the T2000 Server Manually
For NEs without the NTP service congured, you are suggested to check whether the NE time is consistent with the T2000 server time. If not, synchronize the NE time with the T2000 server manually.
Prerequisites
n You must be an NM user with "NE and network operator" authority or higher.
n The synchronous mode of NE time is set to NM or None.
Context
NOTE
Synchronizing NE time does not affect the service. Before synchronizing the NE time, verify that the system time on the T2000 server is correct. If you want to change the system time, exit the T2000 to reset the time and then start the T2000 again.
Procedure
Step 1 Select Conguration > NE Time Synchronization from the Main Menu.
Step 2 Select the NEs in the left pane and click .
Step 3 Select one or more NEs in the list. Right-click and select Synchronize with NM from the shortcut menu.
NOTE
You can perform this operation only when the Synchronous Mode is set to NM or None.
Step 4 Click Yes in the prompt dialog box.
Step 5 Click Close in the Operation Result dialog box.
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8.4 Synchronizing NE Time with the NTP Server
The Network Time Protocol (NTP) service can be used to keep NE time synchronized with the NTP server automatically. In theory, the accuracy of NE time can reach a nanosecond.
If NTP servers are congured in the network, set NTP time synchronization for NEs before service conguration.
Prerequisites
n You must be an NM user with "NE and network operator" authority or higher.
n The NE must support the NTP synchronization mode.
Procedure
Step 1 Select Conguration > NE Time Synchronization from the Main Menu.
Step 2 Select the NEs in the left pane and click . Step 3 Set the Synchronous Mode parameter to NTP.
Step 4 Set the Server Enabled parameter to decide whether the NE works as the NTP server.
n If the ECC protocol is adopted for the communication between NEs, set Server Enabled to ECC Server for gateway NEs, and to Disabled for non-gateway NEs.
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n If the IP protocol is adopted for the communication between NEs, set Server Enabled to Disabled for all NEs.
Step 5 Set the Client Enabled parameter to decide whether the NE works as a client of the NTP server.
n If the ECC protocol is adopted for the communication between NEs, set Client Enabled to IP Client for gateway NEs, and set it to ECC Client for non-gateway NEs.
n If the IP protocol is adopted for the communication between NEs, set Client Enabled to IP Client for all NEs.
Step 6 Set the Synchronous Server parameter.
n If the ECC protocol is adopted for the communication between NEs, for gateway NEs set Synchronous Server to the IP address of the upper level NTP server, and for non-gateway NEs set it to the gateway NE ID.
n If the IP protocol is adopted for the communication between NEs, for all NEs set Synchronous Server to the IP address of the upper level NTP server.
Step 7 Set the Polling Period (min) and The Number of Sampling parameters.
Step 8 Click Apply.
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OptiX iManager T2000
Operator Guide 9 Conguring Protection Subnets