The first four PON ports on the MA5800 901XEHD fail to learn MAC addresses due to NP hardware faults

This time, I will share with you a case about thefirst four PON ports on the MA5800 901XEHD fail to learn MAC addresses due to NP hardware faults.

Issue description

The first four PON ports on the MA5800 901XEHD fail to learn MAC addresses due to NP hardware faults

Handling Process

1. Check the MAC address learning on the PON port. It is found that the MAC address cannot be learned.

The MA5800.D(diagnose)%% display mac-address port 0/14/0 0-3 port cannot learn MAC addresses.

{<cr>|ont<K>||<K>}:

Command:

display mac-address port 0/14/0

Failed: No MAC address records can be displayed.

2. Check whether the board has a soft error.

MA5800.D(diagnose)%%DISPlay SOFt-error BOArd 0/14

{<cr>||<K>}:

Command:

DISPlay SOFt-error BOArd 0/14

Chip 0

Current status:

Chip soft error: No

Number of upstream packets modified by soft errors: 0

Number of downlink packets modified by soft errors: 0

Time when the chip soft error occurs for the first time: –

Last Status:

Chip soft error: No

Number of upstream packets modified by soft errors: 0

Number of downlink packets modified by soft errors: 0

Time when the chip soft error occurs for the first time: –

Chip 1

Current status:

Chip soft error: No

Number of upstream packets modified by soft errors: 0

Number of downlink packets modified by soft errors: 0

Time when the chip soft error occurs for the first time: –

Last Status:

Chip soft error: No

Number of upstream packets modified by soft errors: 0

Number of downlink packets modified by soft errors: 0

Time when the chip soft error occurs for the first time: –

FE health status: 0x00000000

Chip 0

FE health information:

Chip 1

FE health information:

3. No hardware alarm is reported on the board.

The MA5800.D(diagnose)%% display alarm history alarmparameter 0/14 list does not report any alarms related to hardware faults.

4. The link information of the board is normal.

MA5800.D(diagnose)%%display statistics serial-link 0/14

{<cr>||<K>}:

Command:

display statistics serial-link 0/14

Status: Normal

5. Checked the log of the internal communication port on the board. It was found that an NP hardware alarm was generated on the internal communication port.

MA5800.D(diagnose)%%display statistics inner-error log 0/14

{<cr>||<K>}:

Command:

display statistics inner-error log 0/14

Time Exception Type Exception Information

——————————————————————————

2022-11-23 19:19+08:00 Cpu Car ptype mask: 15; packet loss rate increases fastest; ptype: 0

2022-11-23 19:19 + 08:00 Traffic Detection Broadcast Queue Dropped Packets: 4294967295

2022-11-23 19:19+08:00 NP Hardware Fault

6. After the customer restarts the board, MAC address learning is normal, and the problem is solved.
 

Root cause

The first four PON ports fail to learn MAC addresses due to NP hardware faults.

Solution

Restart the board. If the problem persists, replace the board.