The Los Angeles Police Departments Media GuideFull description
ALM-21511 LAPD Link Congestion
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ALM-21511 ALM21511 LAPD Link Congestion Description This alarm is generated when the length of the LAPD send queue exceeds the upper limit of the configured congestion threshold.
Attribute Alarm ID
Alarm Severity
Alarm Type
21511
Minor
Fault
Parameters Name
Meaning
Subr Subrac ack k No. No.
Numb Number er of the the sub subra rack ck wher where e the the XPU/ XPU/EI EIU U boa board rd cont contro roll llin ing g the the LAPD LAPD sign signal alin ing g lin link k is is located
Slo Slot No No.
Number of of th the sl slot wh where th the XP XPU/EIU EIU bo board co controllin lling g th the LA LAPD si signaling lilink is is lo located ted
Subs Subsys ystem tem No. No.
Numb Number er of of the the subs subsys yste tem m on on the the XPU/ XPU/EI EIU U boar board d con contro troll llin ing g the the LAP LAPD D sign signal alin ing g link link
Link No.
Number of the LAPD signaling link
Port No.
Number of the E1 port where the LAPD signaling link is located
Bearing Bearing Subrack Subrack No.
Number Number of the subrack subrack where where the board board bearing bearing the LAPD LAPD signaling signaling link is located located
Bear Bearin ing g Slot Slot No. No.
Numb Number er of of the the slot slot whe where re the the boa board rd bea bearin ring g the the LAPD LAPD sign signal alin ing g link link is loc locat ated ed
Inte Interf rfac ace e Typ Type e
Type Type of the the int inter erfa face ce wher where e the the LAPD LAPD sign signal alin ing g lin link k is is loc locat ated ed
Site Index
Index of the site where the LAPD signaling link is located
Site Name
Name of the site where the LAPD signaling link is located
Ater Signaling Link ID
Ater signaling link ID where the LAPD signaling li nk is located
PbSL PbSL Logical Logical Inde Index x
PbSL PbSL logica logicall index index where where the the LAPD LAPD signal signaling ing link link is loca located ted
Impact on System The inappropriate setting of the congestion threshold or heavy traffic volume will slow down the service processing speed.
System Actions When the system reports this alarm, it also reports the LAPD link s tate to the MTLS, an upper-layer module corresponding to the LAPD. The MTLS then automatically performs flow control based on the link state and sets the congestion attribute of the LAPD to congested. At the same time, the MTLS sends messages to the peer end (GBTS or PCU). If the length of the message queue is lower than the lower limit of the congestion threshold, a recovery alarm is automatically reported and the link state is reported to the MTLS. The congestion attribute of the LAPD is set to uncontested, and the MTLS continues to send messages. messages.
Possible Causes The congestion threshold is inappropriately configured. The recommended value for the upper li mit is 90, and the recommended value for the lower limit is 80.
Handling Procedure
ALM-21511 LAPD Link Congestion
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1. Check whether whether the alarm alarm can be automatica automatically lly cleared cleared within one minute minute after its occurren occurrence. ce. YES=>The alarm is cleared. The alarm handling is complete. NO=>The alarm persists. Go to step 2. 2. Check whethe whetherr the congestion congestion thresho threshold ld is appropria appropriately tely configure configured. d. a. Run the LST LAPDLNK command to check whether the congestion threshold of the LAPD link is set to a low value. Note that the recommended value for the upper limit is 90, and the recommended value for the lower limit is 80. YES=>The congestion threshold is appropriately configured. Contact Huawei Customer Service Center. NO=>The congestion threshold is inappropriately configured. Go to step b. b. Run the SET GTRXFC command to reconfigure the congestion threshold of the LAPD link. Go to step 3. 3. Che Check ck wheth whether er this this alar alarm m is clea cleared red.. YES=>The alarm is cleared. The alarm handling is complete. NO=>The alarm persists. Contact Huawei Customer Service Center.
