[code sync] Merge code from sonic-net/sonic-utilities:202411 to 202412

doc/Command-Reference.md

@@ -5222,6 +5222,54 @@ This command is to display the link-training status of the selected interfaces.
     Ethernet8      trained          on      up       up
   ```
 
+**show interfaces flap**
+
+The show interfaces flap command provides detailed insights into interface events, including the timestamp of the last link down event and the total flap count (number of times the link has gone up and down). This helps in diagnosing stability and connectivity issues.
+
+- Usage:
+  ```
+  show interfaces flap
+  ```
+- Example:
+  ```
+  admin@sonic:~$ show interfaces flap
+  Interface    Flap Count    Admin    Oper    Link Down TimeStamp (UTC)                                 Link Up TimeStamp (UTC)
+  -----------  ------------  -------  ------  --------------------------------------------------------  -----------------------------------------------------------
+  Ethernet0    5             Up       Up      Last flapped : 2024-10-01 10:00:00 (0 days 00:01:23 ago)  Last Link up: 2024-09-30 10:01:03 UTC (1 days 02:30:15 ago)
+  Ethernet4    Never         Up       Up      Never                                                     Last Link up: 2024-09-30 10:01:03 UTC (1 days 02:30:15 ago)
+  Ethernet8    1             Up       Up      Last flapped : 2024-10-01 10:01:00 (0 days 00:00:23 ago)  Last Link up: 2024-10-02 10:01:03 UTC (5 days 02:30:15 ago)
+  ```
+**show interfaces errors**
+
+The show interface errors command provides detailed statistics and error counters for MAC-level operations on an interface. It displays the status of various operational parameters, error counts, and timestamps for when these errors occurred.
+
+- Usage:
+  ```
+  show interfaces errors [<interface_name>]
+  ```
+
+- Example:
+  ```
+  admin@sonic:~$ show interfaces errors Ethernet4
+  Port Errors                        Count           Last timestamp(UTC)
+  ---------------------------------- -----           -------------------
+  oper_error_status                  5442            2024-11-02 04:00:05
+  mac_local_fault                    2               2024-11-02 04:00:05
+  fec_sync_loss                      2               2024-11-02 04:00:05
+  fec_alignment_loss                 2               2024-11-02 04:00:05
+  high_ser_error                     2               2024-11-02 04:00:05
+  high ber_error                     2               2024-11-02 04:00:05
+  data_unit_crc_error                2               2024-11-02 04:00:05
+  data_unit_misalignment_error       2               2024-11-02 04:00:05
+  signal_local_error                 2               2024-11-02 04:00:05
+  mac_remote_fault                   2               2024-11-02 04:00:50
+  crc_rate                           2               2024-11-02 04:00:50
+  data_unit_size                     2               2024-11-02 04:00:50
+  code_group_error                   0               Never
+  no_rx_reachability                 0               Never
+  ```
+
+
 **show interfaces mpls**
 
 This command is used to display the configured MPLS state for the list of configured interfaces.