ALM-5024 SFP Port Inconsistency Alarm

Description

The SFP port configuration on the RXU Chain of the BSC is inconsistent with the physical connection.

Attribute

Alarm ID	Alarm Severity	Alarm Type
5024	Major	Fault

Parameters

ID	Name	Meaning
1	Site No.	Number of the site where the faulty board or module is located Value range: 0-2047
2	Board Type	Number of the type which the faulty board belongs to. 87:GTMU
3	Board No.	Number of the fault board 0-7:GTMU
4	PassNo	Number of the passage where the faulty board is located.
5	SubLink No.	Alarm sub-category number 0: SFP0 port 1: SFP1 port 2: SFP2 port 3: SFP3 port 4: SFP4 prot 5: SFP5 prot
6	Cell Index	Index of the cell where the board or module is located 0-2047: Cell index of the faulty cell in the data configuration 65535: None
7	Site Type	Type of the site where the faulty board is located. 17:DBS3900 GSM; 18:BTS3900 GSM; 19:BTS3900A GSM;
8	RackNo	Number of the rack where the faulty board is located.
9	BoxNo	Number of the subrack where the faulty board is located.
10	SlotNo	Number of the slot where the faulty board is located.
11	Site Name	Site Name
12	Alarm Attribute	Alarm Character 0:Normal 1:Transient Count

Impact on the System

The communication between BBU and RXU fails when the alarm occurs.

System Actions

None.

Possible Causes

Topology configuration on the SFP port is inconsistent with physical connection.
RXU chain/ring on the SFP port is disconnected.
A CPRI port on the RXU chain/ring on the SFP port is blocked.

Procedure

Check the RXU chain/ring configuration at the SFP port on the LMT.
1. Based on the detailed alarm information, check the RXU chain/ring configuration at the SFP port on the LMT. Check whether the configured RXU levels are consistent with the RXU levels in network planning.
  Y => The configured RXU levels are consistent with the RXU levels in network planning. Go to step b.
  
  N => The configured RXU levels are inconsistent with the RXU levels in network planning. Go to step d.
2. Check the configured chain/ring. Check for any incorrect configurations, such as a chain that is mistakenly configured as a ring, or a ring that is mistakenly configured as a chain.
  Y => There is an incorrect configuration. Go to step c.
  
  N => There is no incorrect configuration. Go to procedure 2.
3. Reconfigure the chain/ring according to the network planning. Then, check whether the alarm is cleared.
  Y => The alarm is cleared. No further action is required.
  
  N => The alarm is not cleared. Go to procedure 2.
4. Check whether the configured RXU levels are greater than the RXU levels in network planning.
  Y => The configured RXU levels are greater than the RXU levels in network planning. Go to step e.
  
  N => The configured RXU levels are smaller than the RXU levels in network planning. Go to step f.
5. Remove the redundant RXU(s) in the chain/ring according to the network planning. Then, check whether the alarm is cleared.
  Y => The alarm is cleared. No further action is required.
  
  N => The alarm is not cleared. Go to procedure 2.
6. Add the required RXU(s) in the chain/ring according to the network planning. Then, check whether the alarm is cleared.
  Y => The alarm is cleared. No further action is required.
  
  N => The alarm is not cleared. Go to procedure 2.
On site, check the actual RXU connections and configuration.
1. Based on the detailed alarm information, check whether the CPRI LED on the main controlling board and the CPRI LED on the RXU are steady ON in red.
  Y => The CPRI LED on the main controlling board and the CPRI LED on the RXU are steady ON in red. Go to step b.
  
  N => The CPRI LED on the main controlling board and the CPRI LED on the RXU are steady ON in green. Go to step c.
2. Check the CPRI link. Rectify the CPRI link fault. Then, check whether the alarm is cleared.
  Y => The alarm is cleared. No further action is required.
  
  N => The alarm is not cleared. Go to step c.
3. Check whether the configured RXU levels are consistent with the RXU levels in network planning.
  Y => The configured RXU levels are consistent with the RXU levels in network planning. Contact Huawei Customer Service Center.
  
  N => The configured RXU levels are inconsistent with the RXU levels in network planning. Go to step d.
4. Check whether the actual RXU levels are greater than the RXU levels in network planning.
  Y => The actual RXU levels are greater than the RXU levels in network planning. Go to step e.
  
  N => The actual RXU levels are smaller than the RXU levels in network planning. Go to step f.
5. According to the network planning, remove the redundant RXU(s). Then, check whether the alarm is cleared.
  Y => The alarm is cleared. No further action is required.
  
  N => The alarm is not cleared. Contact Huawei Customer Service Center.
6. According to the network planning, install the required RXU(s). Then, check whether the alarm is cleared.
  Y => The alarm is cleared. No further action is required.
  
  N => The alarm is not cleared. Contact Huawei Customer Service Center.