NE40E Version: V300R002C02B21B.
When the GE link changes to down or Up, the information was not updated in Logbuffer and not also in Log of HD.
When the status of physical interface changes the information is not recorded in Logbuffer. After configuration of Following commands the problem was resolved
info-center source default channel 0 log level notification.
info-center source default channel 1 log level notification .
In this version information center is no set correctly. In this version that level of records are not updated . But we can change it.
Befault huawei should included these commands in the versionV300R002C02B21B.