Description of the problem

Meaning and handling of the ALM_GFP_dLFDF alert.

Solution

ALM_GFP_dLFD is a GFP (Generic Framing Procedure) frame loss of step alarm. This alarm is generated when the GFP delimited state machine jumps out of the SYNC state of the delimited processing, and the alarm is canceled when it returns to the SYNC state.

Processing method:

1. check whether the number of uplink time slots (number of downlink time slots) of the VCTRUNK binding configured at this end is consistent with the number of downlink time slots (number of uplink time slots) configured at the opposite end.

2、Check whether the fiber optic connector is loose, not clean, whether there is a fiber optic cable failure, poor contact of components in the optical path transmission.

3. For the Ethernet single board with interface board, replace the interface board first. For the single board without interface board, directly replace the single board that reports alarms.

The related technical information in this chapter and the troubleshooting process of SDH equipment are provided by Shenzhen Optical Transmission Network Technology Co. Huawei SDH Optical Transmission Equipment,SDH Transmission Equipment Sales