Some days ago, I have took some trace messages on the softswitch side and discovered that four links cannot transfer messages when all links are in activated state. Analyze the M3UA association data and discover four links correspond to the same local IP address of the SG. Query the script data of the SG and discover the local IP combination is configured as follows:

ADD LIPC: FEX1=0, FEX2=1,CONFIRM=Y;

The fault can be located in the following manner: The local office configures two IP addresses which are used in all M3UA associations. Only one IP address is configured on the softswitch side. Therefore, all the messages sent from the other IP address to the softswitch are discarded.

 

Solution: I have visited Huawei supportwebsite and found the below solution:

Change the local IP combination to the following:

ADD LIPC: FEX1=0,CONFIRM=Y;

This configuration enables each M3UA link of the softswitch to correspond to only one local IP address. Now, the fault is removed.

Very good & keep it up..