Fault Identification

Troubleshooting Procedure

1. Check the office direction traffic measurement results to see whether the load of messages from a certain PCEF increases substantially before and after flow control.
   • Yes: Go to 2.
   • No: Contact Huawei technical support engineers.
2. Run LST MFLOWCTRL in the MML Command - UPCC window to check whether the office direction flow control switch is enabled. The following is an example command:

   LST MFLOWCTRL: PCRFID=1, PEERTYPE=PCEF, PEERID=PCEF????ID; 

   • Yes: Go to 4.
   • No: Go to 3.
3. Run MOD MFLOWCTRL to enable the office direction flow control switch. The following is an example command:

   MOD MFLOWCTRL: PCRFID=1, PEERTYPE=PCEF, PEERID=PCEF????ID, FLOWCTRL=ON;

4. Run LST FLOWCTRL to check whether flow control parameters are set to the default values. The following command output lists the default parameter values:

   LST FLOWCTRL:;

   %%LST FLOWCTRL:;%% RETCODE = 0  Operation succeeded  The result is as follows ------------------------            System configuration parameter  =  System parameter Flow control configuration parameter name  =  Flow control parameter                       Flow control switch  =  ON          CPU flow control start threshold  =  95            CPU flow control end threshold  =  85         DRU time span start threshold(ms)  =  500         DSU time span start threshold(ms)  =  500         DSG time span start threshold(ms)  =  500           DRU time span end threshold(ms)  =  100           DSU time span end threshold(ms)  =  100           DSG time span end threshold(ms)  =  100        LDAP time span start threshold(ms)  =  80          LDAP time span end threshold(ms)  =  50 (Number of results = 1)  ---    END

   • Yes: Contact Huawei technical support engineers.
   • No: Go to 5.
5. Run MOD FLOWCTRL to change the flow control parameters to the default values. The following is an example command:

   MOD FLOWCTRL: FLWCTRFLG=ON, CPUFLWSTR=95, CPUFLWEND=85, DRUTSSTR=500, DSUTSSTR=500, DSGTSSTR=500, DRUTSEND=100, DSUTSEND=100, DSGTSEND=100, LDAPTSSTR=80, LDAPTSEND=50;

6. Check whether this alarm is cleared.
   • Yes: No further action is required.