When we use Huawei NE series routers, we sometimes encounter problems. How can these problems be solved? We provide the Troubleshooting Guide to help you.
If you encounter the 1588v2 Clock Source Selection Is Correct, But Time and Frequency Tracing Precision Does Not Meet 1588v2 Clock, perform the following steps:
1. Check that the clock works in the tracing state, that is, check that System trace source State in the display clock source command output is lock mode.
Run the display clock source command to check whether System trace source State is lock mode.
§ If System trace source State is not lock mode, run the display clock config command to check whether sys pll is clock select mode auto.
o If sys pll is not clock select mode auto, run the clock run-mode normal command in the system view to set the clock running mode to normal.
o If sys pll is clock select mode auto, configure frequency source synchronization. If you specify PTP synchronization, a device synchronizes frequency based on 1588v2 clock source selection results. If you specify physical-layer synchronization, a device synchronizes frequency based on physical-layer clock source selection results. For details, see the chapter "1588v2 Configuration" in the Configuration - System Management or "Clock Synchronization Configuration" in the Configuration - Basic Configurations.
§ If System trace source State is lock mode, go to Step 2.
2. Check that the P/E modes of the PTP interfaces at both ends of the link are the same, that is, check that Delay-mech in the display ptp all command output is the same at both ends.
Run the display ptp all command at both ends respectively to check whether Delay-mech is the same.
§ If Delay-mech is different, the interface status is normal but time is not synchronized. Run the ptp delay-mechanism { delay | pdelay } command on the interface view to set the same delay mechanism at both ends.
§ If Delay-mech is the same, go to Step 3.
3. Check that 1588v2 transmission asymmetry correction is configured for all devices.
1588v2 transmission asymmetry correction is configured only when the receive and transmit optical fibers have different lengths. If the receive and transmit optical fibers have the same length, configuring 1588v2 transmission asymmetry correction causes time not to be synchronized.
§ If the receive and transmit optical fibers have different lengths and no 1588v2 transmission asymmetry correction is configured, run the ptp asymmetry-correction command in the interface view to configure an asymmetry correction time in ns.
§ If the receive and transmit optical fibers have the same length or 1588v2 transmission asymmetry correction has been configured, go to Step 4.
4. Collect the following information and contact Huawei technical support personnel.
§ Results of the troubleshooting procedure
§ Configuration files, log files, and alarm files of the devices
For more troubleshooting cases, see: NE40E Troubleshooting Guide V4.0 (VRPv8)
https://support.huawei.com/enterprise/en/doc/EDOC1000177634
