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Mtu на интерфейсах ce6800
Восстанавливаем конфиг с внешенй usb
Смена ip адресов на dad линках
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Mtu на интерфейсах ce6800

UPDATE

Команда “jumboframe enable” принимает два значения.

In V100R005C10 and later versions, run the jumboframe enable value1 [ value2 ] command in the interface view to configure the maximum length of a jumbo frame value1 and the threshold of a non-jumbo frame value2. The switch forwards a frame whose length ranges from value1 to value2 (excluding value2) as a jumbo frame and discards a frame whose length is greater than value1. The switch forwards a frame whose length is less than or equal to value2 as a normal frame and does not count it as a jumbo frame.

Первое значение (value1) задает максимальный размер фрейма который может пройти через интфрейс.
А второе значение (value2) задает размер “обычного” фрейма.
Второе значение нужно, что бы более красиво распределять пакеты по счетчикам интерфесов.
Пакеты размером до value2 попадают в счетчик обычных пакетов.
Пакеты размером от value2 до value1 попадают в счетчик джамбо пакетов.

/UPDATE

Если посмотреть на интерфейсы, то на них по дефолтку разрешены jumbo-frames, дефолтное значение 9216.
Так же можно задать размер пакетов которые надо считать как обычные пакеты, дефолтное значение 1518.

[sw21-10GE1/0/1]dis interface 10GE 1/0/1 
10GE1/0/1 current state : DOWN (ifindex: 5)
Line protocol current state : DOWN 
Description: 
Switch Port, PVID :    1, TPID : 8100(Hex), The Maximum Frame Length is 9216
...

[sw21-10GE1/0/1]jumboframe enable ?
  INTEGER<1518-12288>  Maximum frame size. The default value is 9216

[slv-sw21-10GE1/0/1]jumboframe enable 9216 ?
  INTEGER<1518-9216>  Non-jumbo frame size threshod. The default value is 1518
  <cr>

При этом, если посмотреть на mtu по snmp, то на интфрейсах на которых нет линка, значение mtu будет 1518, а на которых есть линк будет значение 1500.

...
IF-MIB::ifDescr.4 = STRING: MEth0/0/0
IF-MIB::ifDescr.5 = STRING: 10GE1/0/1
IF-MIB::ifDescr.6 = STRING: 10GE1/0/2
...
IF-MIB::ifDescr.19 = STRING: 10GE1/0/15
IF-MIB::ifDescr.20 = STRING: 10GE1/0/16
IF-MIB::ifDescr.21 = STRING: 10GE1/0/17
...
IF-MIB::ifOperStatus.4 = INTEGER: up(1)
IF-MIB::ifOperStatus.5 = INTEGER: down(2)
IF-MIB::ifOperStatus.6 = INTEGER: down(2)
...
IF-MIB::ifOperStatus.19 = INTEGER: down(2)
IF-MIB::ifOperStatus.20 = INTEGER: up(1)
IF-MIB::ifOperStatus.21 = INTEGER: down(2)
...
# snmpwalk -c xxx -v 2c x.x.x.x IF-MIB::ifMtu.5
IF-MIB::ifMtu.5 = INTEGER: 1518
# snmpwalk -c xxx -v 2c x.x.x.x IF-MIB::ifMtu.20
IF-MIB::ifMtu.20 = INTEGER: 1500

~~Изменение настроек на “jumboframe enable” не влияет на то, что отдает коммутатор по snmp.~~
Коммутатор по snmp, в mtu, показывает именно второе “информационное” значение команды “jumboframe enable”.
Для физических интфейсов на эти значения можно не смотреть.

[slv-sw21-10GE1/0/1]jumboframe enable ?
  INTEGER<1518-12288>  Maximum frame size. The default value is 9216

[slv-sw21-10GE1/0/1]jumboframe enable 9216 ?
  INTEGER<1518-9216>  Non-jumbo frame size threshod. The default value is 1518
  <cr>                

[slv-sw21-10GE1/0/1]jumboframe enable 9216 2000
...
# snmpwalk -c xxx -v 2c x.x.x.x IF-MIB::ifMtu.5
IF-MIB::ifMtu.5 = INTEGER: 2000

Восстанавливаем конфиг с внешенй usb

<HUAWEI>dir flash:
Directory of flash:/

  Idx  Attr     Size(Byte)  Date        Time       FileName                     
    0  dr-x              -  Oct 11 2021 14:48:26   $_checkpoint                 
    1  dr-x              -  Jan 23 2021 10:45:28   $_install_mod                
    2  dr-x              -  Nov 03 2021 14:55:23   $_license                    
    3  dr-x              -  Oct 11 2021 14:47:58   $_security_info              
    4  dr-x              -  Oct 11 2021 14:57:10   $_system                     
    5  -rw-    128,772,300  Jan 04 2021 10:21:49   CE6810LI-V200R002C50SPC800.cc
    6  -rw-      1,339,283  Nov 03 2021 14:57:13   CE6810LI-V200R002SPH016.PAT  
    7  -rw-      4,206,539  Sep 19 2021 09:50:14   CE6810LI-V200R002SPH022.PAT  
    8  -rw-    135,653,156  Sep 19 2021 10:35:20   CE6810LI-V200R005C10SPC800.cc
    9  -rw-      2,826,131  Sep 19 2021 10:36:08   CE6810LI-V200R005SPH008.PAT  
   10  drwx              -  Nov 03 2021 14:52:09   POST                         
   11  -rw-             97  Nov 03 2021 14:52:12   collect_diag_info.bat        
   12  -rw-         17,086  Oct 11 2021 14:51:52   device.sys                   
   13  drwx              -  Oct 11 2021 14:57:15   logfile                      
   14  -rw-          2,598  Oct 11 2021 13:42:27   vrpcfg-test.zip              
   15  -rw-            907  Oct 11 2021 14:51:51   vrpcfg.zip                   
   16  -rw-          5,914  Mar 04 2021 17:00:29   ztp_20210304165135.log       
   17  -rw-         13,961  Mar 04 2021 16:58:59   ztp_20210304165135.log.1     
   18  -rw-            824  Mar 04 2021 16:54:19   ztp_20210304165135.log.2     

269,168 KB total (11,028 KB free)
<HUAWEI>co	
<HUAWEI>compare	
<HUAWEI>configuration	
<HUAWEI>dir usb:/
Directory of usb:/

  Idx  Attr     Size(Byte)  Date        Time       FileName                     
    0  -rw-        155,216  Apr 21 2021 20:25:28   AFUDOSU.SMC                  
... 
   13  -rw-          2,588  Oct 11 2021 14:27:10   bup-conf.zip                 


1,951,992 KB total (1,899,400 KB free)

<HUAWEI>copy usb:/bup-conf.zip flash:/vrpcfg.zip 
Error: flash:/vrpcfg.zip is protected.
<HUAWEI>copy usb:/bup-conf.zip flash:/vrpcfg-from-bup.zip  
Info: Are you sure to copy usb:/bup-conf.zip to flash:/vrpcfg-from-bup.zip? [Y/N]:y
100%  complete  
Info: Copying file usb:/bup-conf.zip to flash:/vrpcfg-from-bup.zip...Done.
<HUAWEI>dir flash: 
Directory of flash:/

  Idx  Attr     Size(Byte)  Date        Time       FileName                     
    0  dr-x              -  Oct 11 2021 14:58:00   $_checkpoint                 
    1  dr-x              -  Jan 23 2021 10:45:28   $_install_mod                
    2  dr-x              -  Nov 03 2021 14:55:23   $_license                    
    3  dr-x              -  Oct 11 2021 14:47:58   $_security_info              
    4  dr-x              -  Oct 11 2021 14:57:10   $_system                     
    5  -rw-    128,772,300  Jan 04 2021 10:21:49   CE6810LI-V200R002C50SPC800.cc
    6  -rw-      1,339,283  Nov 03 2021 14:57:13   CE6810LI-V200R002SPH016.PAT  
    7  -rw-      4,206,539  Sep 19 2021 09:50:14   CE6810LI-V200R002SPH022.PAT  
    8  -rw-    135,653,156  Sep 19 2021 10:35:20   CE6810LI-V200R005C10SPC800.cc
    9  -rw-      2,826,131  Sep 19 2021 10:36:08   CE6810LI-V200R005SPH008.PAT  
   10  drwx              -  Nov 03 2021 14:52:09   POST                         
   11  -rw-             97  Nov 03 2021 14:52:12   collect_diag_info.bat        
   12  -rw-         17,086  Oct 11 2021 14:51:52   device.sys                   
   13  drwx              -  Oct 11 2021 14:57:15   logfile                      
   14  -rw-          2,588  Oct 11 2021 14:59:01   vrpcfg-from-bup.zip          
   15  -rw-          2,598  Oct 11 2021 13:42:27   vrpcfg-test.zip              
   16  -rw-            907  Oct 11 2021 14:51:51   vrpcfg.zip                   
   17  -rw-          5,914  Mar 04 2021 17:00:29   ztp_20210304165135.log       
   18  -rw-         13,961  Mar 04 2021 16:58:59   ztp_20210304165135.log.1     
   19  -rw-            824  Mar 04 2021 16:54:19   ztp_20210304165135.log.2     

269,168 KB total (11,020 KB free)
<HUAWEI>

<HUAWEI>dis startup
MainBoard:
  Configured startup system software:        flash:/CE6810LI-V200R005C10SPC800.cc
  Startup system software:                   flash:/CE6810LI-V200R005C10SPC800.cc
  Next startup system software:              flash:/CE6810LI-V200R005C10SPC800.cc
  Startup saved-configuration file:          flash:/vrpcfg.zip
  Next startup saved-configuration file:     flash:/vrpcfg.zip
  Startup paf file:                          default
  Next startup paf file:                     default
  Startup patch package:                     flash:/CE6810LI-V200R005SPH008.PAT
  Next startup patch package:                flash:/CE6810LI-V200R005SPH008.PAT
<HUAWEI>sta	
<HUAWEI>startup co	
<HUAWEI>startup sa  
<HUAWEI>startup saved-configuration fl	
<HUAWEI>startup saved-configuration flash:/v	
<HUAWEI>startup saved-configuration flash:/vrpcfg-	
<HUAWEI>startup saved-configuration flash:/vrpcfg-from-bup.zip
Info: Operating, please wait for a moment......done.
Info: Succeeded in setting the configuration for booting system.
<HUAWEI>dis star	
<HUAWEI>dis startup 
MainBoard:
  Configured startup system software:        flash:/CE6810LI-V200R005C10SPC800.cc
  Startup system software:                   flash:/CE6810LI-V200R005C10SPC800.cc
  Next startup system software:              flash:/CE6810LI-V200R005C10SPC800.cc
  Startup saved-configuration file:          flash:/vrpcfg.zip
  Next startup saved-configuration file:     flash:/vrpcfg-from-bup.zip
  Startup paf file:                          default
  Next startup paf file:                     default
  Startup patch package:                     flash:/CE6810LI-V200R005SPH008.PAT
  Next startup patch package:                flash:/CE6810LI-V200R005SPH008.PAT
<HUAWEI>

<HUAWEI>reboot 
slot 1:
Next startup system software: flash:/CE6810LI-V200R005C10SPC800.cc
Next startup saved-configuration file: flash:/vrpcfg-from-bup.zip
Next startup paf file: default
Next startup patch package: flash:/CE6810LI-V200R005SPH008.PAT
Warning: The current configuration will be saved to the next startup saved-configuration file. Continue? [Y/N]:n
Warning: The system will reboot. Continue? [Y/N]:y

*************************************************************
*  Copyright (C) <2021-2021> Huawei Technologies Co., Ltd.  *
*************************************************************

CloudEngine BIOS Version: 433  (Oct 11 2021 - 20:19:17)
Board Name ..................................... CE6810-48S4Q-LI
SDRAM Memory Initializing ...................... BEGIN
SDRAM Memory Size .............................. 2 Gbytes
SDRAM Memory Initializing ...................... DONE 

Press CTRL T for full memory test .............. skip


Starting ... 

Press CTRL B to enter BIOS menu or CTRL E to boot DFX: 0 
Boot Disk: flash
Startup File: CE6810LI-V200R005C10SPC800.cc
Try Times: 1
             
Check system software ........................................ DONE
Check APPDB .................................................. DONE
Set next bootfile ............................................ DONE
Load system software ......................................... DONE
Create file system ........................................... DONE
 
Now starting VRP ........

Configured switch mode ....................................... AUTO-NEGOTIATION
Current switch mode .......................................... STACK
Press CTRL Y to modify the switch mode ....................... skip

Initializing stack ........................................... DONE
Stack member ID .............................................. 1
Stack domain ID .............................................. INVALID
Stack priority ............................................... 100
Default MAC .................................................. 48-57-02-cc-ae-f0
Competing with other devices in the stack .................... DONE
Stack role ................................................... MASTER

User interface con0 is available


Please Press ENTER.


Password:
Info: The max number of VTY users is 5, the number of current VTY users online is 0, and total number of terminal users online is 1.
      The current login time is 2021-10-11 18:07:05 03:00.
<sw21>

<sw21>dis startup 
MainBoard:
  Configured startup system software:        flash:/CE6810LI-V200R005C10SPC800.cc
  Startup system software:                   flash:/CE6810LI-V200R005C10SPC800.cc
  Next startup system software:              flash:/CE6810LI-V200R005C10SPC800.cc
  Startup saved-configuration file:          flash:/vrpcfg-from-bup.zip
  Next startup saved-configuration file:     flash:/vrpcfg-from-bup.zip
  Startup paf file:                          default
  Next startup paf file:                     default
  Startup patch package:                     flash:/CE6810LI-V200R005SPH008.PAT
  Next startup patch package:                flash:/CE6810LI-V200R005SPH008.PAT
	
<slv-sw21>dir flash:
Directory of flash:/

  Idx  Attr     Size(Byte)  Date        Time       FileName                     
    0  dr-x              -  Oct 11 2021 18:07:30   $_checkpoint                 
    1  dr-x              -  Jan 23 2021 13:45:28   $_install_mod                
    2  dr-x              -  Nov 03 2021 17:55:23   $_license                    
    3  dr-x              -  Oct 11 2021 18:07:01   $_security_info              
    4  dr-x              -  Oct 11 2021 18:07:01   $_system                     
    5  -rw-    128,772,300  Jan 04 2021 13:21:49   CE6810LI-V200R002C50SPC800.cc
    6  -rw-      1,339,283  Nov 03 2021 17:57:13   CE6810LI-V200R002SPH016.PAT  
    7  -rw-      4,206,539  Sep 19 2021 12:50:14   CE6810LI-V200R002SPH022.PAT  
    8  -rw-    135,653,156  Sep 19 2021 13:35:20   CE6810LI-V200R005C10SPC800.cc
    9  -rw-      2,826,131  Sep 19 2021 13:36:08   CE6810LI-V200R005SPH008.PAT  
   10  drwx              -  Nov 03 2021 17:52:09   POST                         
   11  -rw-             97  Nov 03 2021 17:52:12   collect_diag_info.bat        
   12  -rw-         17,086  Oct 11 2021 18:01:33   device.sys                   
   13  drwx              -  Oct 11 2021 17:57:15   logfile                      
   14  -rw-          2,588  Oct 11 2021 17:59:01   vrpcfg-from-bup.zip          
   15  -rw-          2,598  Oct 11 2021 16:42:27   vrpcfg-test.zip              
   16  -rw-            907  Oct 11 2021 17:51:51   vrpcfg.zip                   
   17  -rw-          5,914  Mar 04 2021 20:00:29   ztp_20210304165135.log       
   18  -rw-         13,961  Mar 04 2021 19:58:59   ztp_20210304165135.log.1     
   19  -rw-            824  Mar 04 2021 19:54:19   ztp_20210304165135.log.2     

269,168 KB total (11,020 KB free)
<slv-sw21>save
Warning: The current configuration will be written to the device. Continue? [Y/N]:y
Now saving the current configuration to the slot 1 .
Info: Save the configuration successfully.
<sw21>dir flash:
Directory of flash:/

  Idx  Attr     Size(Byte)  Date        Time       FileName                     
    0  dr-x              -  Oct 11 2021 18:07:30   $_checkpoint                 
    1  dr-x              -  Jan 23 2021 13:45:28   $_install_mod                
    2  dr-x              -  Nov 03 2021 17:55:23   $_license                    
    3  dr-x              -  Oct 11 2021 18:07:01   $_security_info              
    4  dr-x              -  Oct 11 2021 18:07:01   $_system                     
    5  -rw-    128,772,300  Jan 04 2021 13:21:49   CE6810LI-V200R002C50SPC800.cc
    6  -rw-      1,339,283  Nov 03 2021 17:57:13   CE6810LI-V200R002SPH016.PAT  
    7  -rw-      4,206,539  Sep 19 2021 12:50:14   CE6810LI-V200R002SPH022.PAT  
    8  -rw-    135,653,156  Sep 19 2021 13:35:20   CE6810LI-V200R005C10SPC800.cc
    9  -rw-      2,826,131  Sep 19 2021 13:36:08   CE6810LI-V200R005SPH008.PAT  
   10  drwx              -  Nov 03 2021 17:52:09   POST                         
   11  -rw-             97  Nov 03 2021 17:52:12   collect_diag_info.bat        
   12  -rw-         17,510  Oct 11 2021 18:08:08   device.sys                   
   13  drwx              -  Oct 11 2021 17:57:15   logfile                      
   14  -rw-          2,612  Oct 11 2021 18:08:08   vrpcfg-from-bup.zip          
   15  -rw-          2,598  Oct 11 2021 16:42:27   vrpcfg-test.zip              
   16  -rw-            907  Oct 11 2021 17:51:51   vrpcfg.zip                   
   17  -rw-          5,914  Mar 04 2021 20:00:29   ztp_20210304165135.log       
   18  -rw-         13,961  Mar 04 2021 19:58:59   ztp_20210304165135.log.1     
   19  -rw-            824  Mar 04 2021 19:54:19   ztp_20210304165135.log.2     

269,168 KB total (11,016 KB free)
<sw21>   


<sw21>dir flash:
Directory of flash:/

  Idx  Attr     Size(Byte)  Date        Time       FileName                     
    0  dr-x              -  Oct 11 2021 18:07:30   $_checkpoint                 
    1  dr-x              -  Jan 23 2021 13:45:28   $_install_mod                
    2  dr-x              -  Nov 03 2021 17:55:23   $_license                    
    3  dr-x              -  Oct 11 2021 18:07:01   $_security_info              
    4  dr-x              -  Oct 11 2021 18:07:01   $_system                     
    5  -rw-    128,772,300  Jan 04 2021 13:21:49   CE6810LI-V200R002C50SPC800.cc
    6  -rw-      1,339,283  Nov 03 2021 17:57:13   CE6810LI-V200R002SPH016.PAT  
    7  -rw-      4,206,539  Sep 19 2021 12:50:14   CE6810LI-V200R002SPH022.PAT  
    8  -rw-    135,653,156  Sep 19 2021 13:35:20   CE6810LI-V200R005C10SPC800.cc
    9  -rw-      2,826,131  Sep 19 2021 13:36:08   CE6810LI-V200R005SPH008.PAT  
   10  drwx              -  Nov 03 2021 17:52:09   POST                         
   11  -rw-             97  Nov 03 2021 17:52:12   collect_diag_info.bat        
   12  -rw-         17,510  Oct 11 2021 18:18:10   device.sys                   
   13  drwx              -  Oct 11 2021 17:57:15   logfile                      
   14  -rw-          2,615  Oct 11 2021 18:18:10   vrpcfg-from-bup.zip          
   15  -rw-          2,598  Oct 11 2021 16:42:27   vrpcfg-test.zip              
   16  -rw-            907  Oct 11 2021 17:51:51   vrpcfg.zip                   
   17  -rw-          5,914  Mar 04 2021 20:00:29   ztp_20210304165135.log       
   18  -rw-         13,961  Mar 04 2021 19:58:59   ztp_20210304165135.log.1     
   19  -rw-            824  Mar 04 2021 19:54:19   ztp_20210304165135.log.2     

269,168 KB total (11,020 KB free)
<sw21>save ?
  STRING<5-64>  The name of specific file(*.cfg, *.zip, *.dat)
  flash:        Device name
  logfile       Save logfile
  usb:          Device name
  <cr>          

<sw21>save vrpcfg.zip
Warning: Are you sure to save the configuration to flash:/vrpcfg.zip? [Y/N]:y
Warning: flash:/vrpcfg.zip exists,overwrite? [Y/N]:y
Now saving the current configuration to the slot 1 
Info: Save the configuration successfully.

<sw21>dir flash:
Directory of flash:/

  Idx  Attr     Size(Byte)  Date        Time       FileName                     
    0  dr-x              -  Oct 11 2021 18:07:30   $_checkpoint                 
    1  dr-x              -  Jan 23 2021 13:45:28   $_install_mod                
    2  dr-x              -  Nov 03 2021 17:55:23   $_license                    
    3  dr-x              -  Oct 11 2021 18:07:01   $_security_info              
    4  dr-x              -  Oct 11 2021 18:07:01   $_system                     
    5  -rw-    128,772,300  Jan 04 2021 13:21:49   CE6810LI-V200R002C50SPC800.cc
    6  -rw-      1,339,283  Nov 03 2021 17:57:13   CE6810LI-V200R002SPH016.PAT  
    7  -rw-      4,206,539  Sep 19 2021 12:50:14   CE6810LI-V200R002SPH022.PAT  
    8  -rw-    135,653,156  Sep 19 2021 13:35:20   CE6810LI-V200R005C10SPC800.cc
    9  -rw-      2,826,131  Sep 19 2021 13:36:08   CE6810LI-V200R005SPH008.PAT  
   10  drwx              -  Nov 03 2021 17:52:09   POST                         
   11  -rw-             97  Nov 03 2021 17:52:12   collect_diag_info.bat        
   12  -rw-         17,510  Oct 11 2021 18:18:37   device.sys                   
   13  drwx              -  Oct 11 2021 17:57:15   logfile                      
   14  -rw-          2,615  Oct 11 2021 18:18:10   vrpcfg-from-bup.zip          
   15  -rw-          2,598  Oct 11 2021 16:42:27   vrpcfg-test.zip              
   16  -rw-          2,598  Oct 11 2021 18:18:37   vrpcfg.zip                   
   17  -rw-          5,914  Mar 04 2021 20:00:29   ztp_20210304165135.log       
   18  -rw-         13,961  Mar 04 2021 19:58:59   ztp_20210304165135.log.1     
   19  -rw-            824  Mar 04 2021 19:54:19   ztp_20210304165135.log.2     

269,168 KB total (11,020 KB free)

<sw21>dis startup
MainBoard:
  Configured startup system software:        flash:/CE6810LI-V200R005C10SPC800.cc
  Startup system software:                   flash:/CE6810LI-V200R005C10SPC800.cc
  Next startup system software:              flash:/CE6810LI-V200R005C10SPC800.cc
  Startup saved-configuration file:          flash:/vrpcfg-from-bup.zip
  Next startup saved-configuration file:     flash:/vrpcfg-from-bup.zip
  Startup paf file:                          default
  Next startup paf file:                     default
  Startup patch package:                     flash:/CE6810LI-V200R005SPH008.PAT
  Next startup patch package:                flash:/CE6810LI-V200R005SPH008.PAT

<sw21>startup saved-configuration vrpcfg.zip 
Info: Operating, please wait for a moment......done.
Info: Succeeded in setting the configuration for booting system.

<sw21>dis startup
MainBoard:
  Configured startup system software:        flash:/CE6810LI-V200R005C10SPC800.cc
  Startup system software:                   flash:/CE6810LI-V200R005C10SPC800.cc
  Next startup system software:              flash:/CE6810LI-V200R005C10SPC800.cc
  Startup saved-configuration file:          flash:/vrpcfg-from-bup.zip
  Next startup saved-configuration file:     flash:/vrpcfg.zip
  Startup paf file:                          default
  Next startup paf file:                     default
  Startup patch package:                     flash:/CE6810LI-V200R005SPH008.PAT
  Next startup patch package:                flash:/CE6810LI-V200R005SPH008.PAT

<sw21>reboot 
slot 1:
Next startup system software: flash:/CE6810LI-V200R005C10SPC800.cc
Next startup saved-configuration file: flash:/vrpcfg.zip
Next startup paf file: default
Next startup patch package: flash:/CE6810LI-V200R005SPH008.PAT
Warning: The system will reboot. Continue? [Y/N]:y

Смена ip адресов на dad линках

MLAG-пару коммутаторов надо было переводить из песочницы в боевое окружение.
Надо было поменять vlan и ip адреса на Meth интерфейсах и в настройках dfs-group.
В документации описания такого процесса нет, но при этом известно, что коммутаторы через PL договариваются, в том числе и о адресах DAD линков.
Пожтому адреса решил не менять на живую, а сначала положить все порты на слейв ноде, тем самым изолировав ноды друг от друга, и только после этого менять адреса.

Распределение ролей коммутаторов в нормальном состоянии:

Последовательность действий коротко:

Положить MLAG порты на sw22.
Положить Meth порт c sw22.
Зайти на sw22 через консоль и положить PL порты.
На sw22 поменять адрес у meth0 интерфейса и в настройках dfs-group.
Перенести sw21/meth0 в другой vlan, поднять порт meth0 и проверить, что можно зайти по ssh.
Положить meth порт c sw21.
Зайти на sw21 через консоль и поменять адрес у meth0 интерфейса и в настройках dfs-group.
Поднять meth порт c sw21.
Поднять MLAG порты на sw22.

Последовательность действия подробнее.

Кладем MLAG порты на sw22
Кладем порт 10GE1/0/16 на sw22.
Делаем в режиме “system-view immediatly”.

[sw22-10GE1/0/16]shutdown 
#25/active/linkDown/Major/occurredTime:2021-09-18 17:08:21/-/-/alarmID:0x08520003/CID=0x807a0404:The interface status changes. (ifName=Eth-Trunk16, AdminStatus=UP, OperStatus=DOWN, Reason=The conditions for the activation of the interface are not met, mainIfname=Eth-Trunk16)

#26/active/linkDown/Major/occurredTime:2021-09-18 17:08:21/-/-/alarmID:0x08520003/CID=0x807a0404:The interface status changes. (ifName=10GE1/0/16, AdminStatus=DOWN, OperStatus=DOWN, Reason=The interface is shut down, mainIfname=Eth-Trunk16)

[sw22-10GE1/0/16]
Sep 18 2021 17:08:21 sw22 %IFNET/2/linkDown_active(l):CID=0x807a0404-alarmID=0x08520003;The interface status changes. (ifName=Eth-Trunk16, AdminStatus=UP, OperStatus=DOWN, Reason=The conditions for the activation of the interface are not met, mainIfname=Eth-Trunk16)

Sep 18 2021 17:08:21 sw22 %IFNET/2/linkDown_active(l):CID=0x807a0404-alarmID=0x08520003;The interface status changes. (ifName=10GE1/0/16, AdminStatus=DOWN, OperStatus=DOWN, Reason=The interface is shut down, mainIfname=Eth-Trunk16)

#27/active/hwLacpTotalLinkLoss/Major/occurredTime:2021-09-18 17:08:22/-/-/alarmID:0x09360001/CID=0x807a0404:Link bandwidth lost totally. (TrunkIndex=2, TrunkIfIndex=60, TrunkId=16, TrunkName=Eth-Trunk16, Reason=No link is selected.)

#28/active/hwLacpNegotiateFailed/Major/occurredTime:2021-09-18 17:08:22/-/-/alarmID:0x09360000/CID=0x807a0404:The member of LAG negotiation failed. (TrunkIndex=2, PortIfIndex=20, TrunkId=16, TrunkName=Eth-Trunk16, PortName=10GE1/0/16, Reason=A link fault occurred or negotiation information synchronization failed.)

Sep 18 2021 17:08:22 sw22 %LACP/4/LACP_STATE_DOWN(l):CID=0x80480432;The LACP state is down. (PortName=10GE1/0/16, TrunkName=Eth-Trunk16, LastReceivePacketTime=[2021-09-18 17:08:05:720], Reason=The interface went down physically or flapped to down. Please check the interface's status, duplex mode, bandwidth, and so on.)

Sep 18 2021 17:08:22 sw22 %LACP/2/hwLacpTotalLinkLoss_active(l):CID=0x807a0404-alarmID=0x09360001;Link bandwidth lost totally. (TrunkIndex=2, TrunkIfIndex=60, TrunkId=16, TrunkName=Eth-Trunk16, Reason=No link is selected.)

Sep 18 2021 17:08:22 sw22 %LACP/2/hwLacpNegotiateFailed_active(l):CID=0x807a0404-alarmID=0x09360000;The member of LAG negotiation failed. (TrunkIndex=2, PortIfIndex=20, TrunkId=16, TrunkName=Eth-Trunk16, PortName=10GE1/0/16, Reason=A link fault occurred or negotiation information synchronization failed.)

Состояние MLAG со стороны sw21, все ок.

<sw21>dis dfs-group 1 m-lag        
*                : Local node
Heart beat state : OK
Node 1 *                            
  Dfs-Group ID   : 1
  Priority       : 150
  Address        : ip address 10.70.70.32 vpn-instance VRF-DAD-1
  State          : Master
  Causation      : - 
  System ID      : 4857-02cc-aef1 
  SysName        : sw21 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI
Node 2                            
  Dfs-Group ID   : 1
  Priority       : 120
  Address        : ip address 10.70.70.33 vpn-instance VRF-DAD-1
  State          : Backup
  Causation      : - 
  System ID      : 4857-02cc-aea1 
  SysName        : sw22 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI
<sw21>

Состояниени MLAG портов, со стороны sw22 (node 2) порт лежит, все ок.

<sw21>dis dfs-group 1 node 1 m-lag 
* - Local node

M-Lag ID     : 16
Interface    : Eth-Trunk 16
Port State   : Up
Status       : active(*)-inactive

<sw21>dis dfs-group 1 node 2 m-lag 
* - Local node

M-Lag ID     : 16
Interface    : Eth-Trunk 16
Port State   : Down
Status       : inactive-active(*)

Кладем Meth порт с sw22
Логи со стороны sw22.

[sw22]
#30/active/linkDown/Major/occurredTime:2021-09-18 17:14:28/-/-/alarmID:0x08520003/CID=0x807a0404:The interface status changes. (ifName=MEth0/0/0, AdminStatus=UP, OperStatus=DOWN, Reason=Interface physical link is down, mainIfname=MEth0/0/0)

Sep 18 2021 17:14:28 sw22 %IFNET/2/linkDown_active(l):CID=0x807a0404-alarmID=0x08520003;The interface status changes. (ifName=MEth0/0/0, AdminStatus=UP, OperStatus=DOWN, Reason=Interface physical link is down, mainIfname=MEth0/0/0)

#29/active/L3V_TRAP_VRF_DOWN/Major/occurredTime:2021-09-18 17:14:28/-/-/alarmID:0x09110000/CID=0x806f2717:The interface bound to the VPN instance went Down. (VpnInstanceName=VRF-DAD-1, IfName=MEth0/0/0, IfCurRowStatus=2, VRFOperationStatus=2)

Sep 18 2021 17:14:28 sw22 %L3VPN/2/L3V_TRAP_VRF_DOWN_active(l):CID=0x806f2717-alarmID=0x09110000;The interface bound to the VPN instance went Down. (VpnInstanceName=VRF-DAD-1, IfName=MEth0/0/0, IfCurRowStatus=2, VRFOperationStatus=2)

#31/active/hwMLagHeartLost/Warning/occurredTime:2021-09-18 17:14:42/-/-/alarmID:0x0ae52002/CID=0x81de271c:The DFS dual-active detection message is lost. Check the source address configuration or link configuration of the local or remote switch.

Sep 18 2021 17:14:42 sw22 %ETRUNK/4/hwMLagHeartLost_active(l):CID=0x81de271c-alarmID=0x0ae52002;The DFS dual-active detection message is lost. Check the source address configuration or link configuration of the local or remote switch.

Кладем PL порты на sw22
Кладем порт 40GE1/0/3 на sw22. В песочнице был один PL порт.
Делаем в режиме “system-view immediatly”.

[sw22-40GE1/0/3]shutdown 
Sep 18 2021 17:20:07 sw22 %LACP/4/LACP_STATE_DOWN(l):CID=0x80480432;The LACP state is down. (PortName=40GE1/0/3, TrunkName=Eth-Trunk0, LastReceivePacketTime=[2021-09-18 17:19:55:745], Reason=The interface went down physically or flapped to down. Please check the interface's status, duplex mode, bandwidth, and so on.)

[sw22-40GE1/0/3]
#32/active/linkDown/Major/occurredTime:2021-09-18 17:20:07/-/-/alarmID:0x08520003/CID=0x807a0404:The interface status changes. (ifName=Eth-Trunk0, AdminStatus=UP, OperStatus=DOWN, Reason=The conditions for the activation of the interface are not met, mainIfname=Eth-Trunk0)

#33/active/linkDown/Major/occurredTime:2021-09-18 17:20:07/-/-/alarmID:0x08520003/CID=0x807a0404:The interface status changes. (ifName=40GE1/0/3, AdminStatus=DOWN, OperStatus=DOWN, Reason=The interface is shut down, mainIfname=Eth-Trunk0)

#34/active/linkDown/Major/occurredTime:2021-09-18 17:20:07/-/-/alarmID:0x08520003/CID=0x807a0404:The interface status changes. (ifName=Vlanif350, AdminStatus=UP, OperStatus=DOWN, Reason=Interface physical link is down, mainIfname=Vlanif350)

#35/active/linkDown/Major/occurredTime:2021-09-18 17:20:07/-/-/alarmID:0x08520003/CID=0x807a0404:The interface status changes. (ifName=Vlanif360, AdminStatus=UP, OperStatus=DOWN, Reason=Interface physical link is down, mainIfname=Vlanif360)

#36/active/linkDown/Major/occurredTime:2021-09-18 17:20:07/-/-/alarmID:0x08520003/CID=0x807a0404:The interface status changes. (ifName=Vlanif370, AdminStatus=UP, OperStatus=DOWN, Reason=Interface physical link is down, mainIfname=Vlanif370)

Sep 18 2021 17:20:07 sw22 %IFNET/2/linkDown_active(l):CID=0x807a0404-alarmID=0x08520003;The interface status changes. (ifName=Eth-Trunk0, AdminStatus=UP, OperStatus=DOWN, Reason=The conditions for the activation of the interface are not met, mainIfname=Eth-Trunk0)

Sep 18 2021 17:20:07 sw22 %IFNET/2/linkDown_active(l):CID=0x807a0404-alarmID=0x08520003;The interface status changes. (ifName=40GE1/0/3, AdminStatus=DOWN, OperStatus=DOWN, Reason=The interface is shut down, mainIfname=Eth-Trunk0)

Sep 18 2021 17:20:07 sw22 %IFNET/2/linkDown_active(l):CID=0x807a0404-alarmID=0x08520003;The interface status changes. (ifName=Vlanif350, AdminStatus=UP, OperStatus=DOWN, Reason=Interface physical link is down, mainIfname=Vlanif350)

Sep 18 2021 17:20:07 sw22 %IFNET/2/linkDown_active(l):CID=0x807a0404-alarmID=0x08520003;The interface status changes. (ifName=Vlanif360, AdminStatus=UP, OperStatus=DOWN, Reason=Interface physical link is down, mainIfname=Vlanif360)

Sep 18 2021 17:20:07 sw22 %IFNET/2/linkDown_active(l):CID=0x807a0404-alarmID=0x08520003;The interface status changes. (ifName=Vlanif370, AdminStatus=UP, OperStatus=DOWN, Reason=Interface physical link is down, mainIfname=Vlanif370)

#37/active/hwLacpTotalLinkLoss/Major/occurredTime:2021-09-18 17:20:08/-/-/alarmID:0x09360001/CID=0x807a0404:Link bandwidth lost totally. (TrunkIndex=0, TrunkIfIndex=58, TrunkId=0, TrunkName=Eth-Trunk0, Reason=No link is selected.)

#38/active/hwLacpNegotiateFailed/Major/occurredTime:2021-09-18 17:20:08/-/-/alarmID:0x09360000/CID=0x807a0404:The member of LAG negotiation failed. (TrunkIndex=0, PortIfIndex=55, TrunkId=0, TrunkName=Eth-Trunk0, PortName=40GE1/0/3, Reason=A link fault occurred or negotiation information synchronization failed.)

Sep 18 2021 17:20:08 sw22 %LACP/2/hwLacpTotalLinkLoss_active(l):CID=0x807a0404-alarmID=0x09360001;Link bandwidth lost totally. (TrunkIndex=0, TrunkIfIndex=58, TrunkId=0, TrunkName=Eth-Trunk0, Reason=No link is selected.)

Sep 18 2021 17:20:08 sw22 %LACP/2/hwLacpNegotiateFailed_active(l):CID=0x807a0404-alarmID=0x09360000;The member of LAG negotiation failed. (TrunkIndex=0, PortIfIndex=55, TrunkId=0, TrunkName=Eth-Trunk0, PortName=40GE1/0/3, Reason=A link fault occurred or negotiation information synchronization failed.)

Физическая связь между коммутаторами отсутствует.
Оба коммутатора стали мастерами и оба себя считают нодой 1.
В выводе отсутствуе информация о ноде 2.

Вывод на sw21.

<sw21>dis dfs-group 1 m-lag 
*                : Local node
Heart beat state : Lost
Node 1 *                            
  Dfs-Group ID   : 1
  Priority       : 150
  Address        : ip address 10.70.70.32 vpn-instance VRF-DAD-1
  State          : Master
  Causation      : PEERLINKDOWN 
  System ID      : 4857-02cc-aef1 
  SysName        : sw21 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI

<sw21>dis dfs-group 1 node 1 m-lag 
* - Local node

M-Lag ID     : 16
Interface    : Eth-Trunk 16
Port State   : Up
Status       : active(*)-inactive

<sw21>dis dfs-group 1 node 2 m-lag 
<sw21>

Вывод на sw22.

[sw22]dis dfs-group 1 m-lag 
*                : Local node
Heart beat state : Lost
Node 1 *                            
  Dfs-Group ID   : 1
  Priority       : 120
  Address        : ip address 10.70.70.33 vpn-instance VRF-DAD-1
  State          : Master
  Causation      : PEERLINKDOWN 
  System ID      : 4857-02cc-aea1 
  SysName        : sw22 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI

[sw22]dis dfs-group 1 node 2 m-lag 
[sw22]dis dfs-group 1 node 1 m-lag 
* - Local node

M-Lag ID     : 16
Interface    : Eth-Trunk 16
Port State   : Down
Status       : inactive(*)-inactive

[sw22]

Меняем ip адрес на sw22.
Делаем в режиме “system-view”.

[~sw22]interface MEth 0/0/0 
[~sw22-MEth0/0/0]undo ip address 10.70.70.33 255.255.255.0 
[*sw22-MEth0/0/0]ip address 10.20.35.142 24
[*sw22-MEth0/0/0]quit

[*sw22]dfs-group 1 
[*sw22-dfs-group-1]undo source ip 
[*sw22-dfs-group-1]source ip 10.20.35.142 vp
[*sw22-dfs-group-1]source ip 10.20.35.142 vpn-instance VRF-DAD-1
[*sw22-dfs-group-1]

[*sw22]dis configuration candidate 
interface MEth 0/0/0
 undo ip address 10.70.70.33 255.255.255.0
 ip address 10.20.35.142 24
dfs-group 1
 undo source ip
 source ip 10.20.35.142 vpn-instance VRF-DAD-1
[*sw22]

Коммитим и смотрим состоние MLAG, адрес поменялся, на sw21 в это время все работало.

<sw22>dis dfs-group 1 m-lag 
*                : Local node
Heart beat state : Lost
Node 1 *                            
  Dfs-Group ID   : 1
  Priority       : 120
  Address        : ip address 10.20.35.142 vpn-instance VRF-DAD-1
  State          : Master
  Causation      : PEERLINKDOWN 
  System ID      : 4857-02cc-aea1 
  SysName        : sw22 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI
<sw22>

Поднимаем Meth интерфес для sw22.
С коммутатора сразу пошел бродкаси трафик.

@r13:~$ monitor interfaces ethernet eth3 traffic 
Capturing traffic on eth3 ...
  0.000000 48:57:02:cc:ae:a0 -> ff:ff:ff:ff:ff:ff ARP Gratuitous ARP for 10.20.35.142 (Request)
  0.000005 48:57:02:cc:ae:a0 -> ff:ff:ff:ff:ff:ff ARP Gratuitous ARP for 10.20.35.142 (Request)
  1.003293 48:57:02:cc:ae:a0 -> ff:ff:ff:ff:ff:ff ARP Gratuitous ARP for 10.20.35.142 (Request)
  1.003297 48:57:02:cc:ae:a0 -> ff:ff:ff:ff:ff:ff ARP Gratuitous ARP for 10.20.35.142 (Request)
  2.004187 48:57:02:cc:ae:a0 -> ff:ff:ff:ff:ff:ff ARP Gratuitous ARP for 10.20.35.142 (Request)
  2.004191 48:57:02:cc:ae:a0 -> ff:ff:ff:ff:ff:ff ARP Gratuitous ARP for 10.20.35.142 (Request)
@r13:~$ monitor interfaces ethernet eth3 traffic detail 
Capturing traffic on eth3 ...
Frame 1 (66 bytes on wire, 66 bytes captured)
    Arrival Time: Sep 18, 2021 12:36:53.388903000
    [Time delta from previous captured frame: 0.000000000 seconds]
    [Time delta from previous displayed frame: 0.000000000 seconds]
    [Time since reference or first frame: 0.000000000 seconds]
    Frame Number: 1
    Frame Length: 66 bytes
    Capture Length: 66 bytes
    [Frame is marked: False]
    [Protocols in frame: eth:arp]
Ethernet II, Src: 48:57:02:cc:ae:a0 (48:57:02:cc:ae:a0), Dst: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
    Destination: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
        Address: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
        .... ...1 .... .... .... .... = IG bit: Group address (multicast/broadcast)
        .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
    Source: 48:57:02:cc:ae:a0 (48:57:02:cc:ae:a0)
        Address: 48:57:02:cc:ae:a0 (48:57:02:cc:ae:a0)
        .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
        .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
    Type: ARP (0x0806)
    Trailer: 0000000000000000000000000000000000000000
    Frame check sequence: 0x00000000 [incorrect, should be 0x69fad3f5]
Address Resolution Protocol (request/gratuitous ARP)
    Hardware type: Ethernet (0x0001)
    Protocol type: IP (0x0800)
    Hardware size: 6
    Protocol size: 4
    Opcode: request (0x0001)
    [Is gratuitous: True]
    Sender MAC address: 48:57:02:cc:ae:a0 (48:57:02:cc:ae:a0)
    Sender IP address: 10.20.35.142 (10.20.35.142)
    Target MAC address: 00:00:00:00:00:00 (00:00:00:00:00:00)
    Target IP address: 10.20.35.142 (10.20.35.142)

Frame 2 (66 bytes on wire, 66 bytes captured)
    Arrival Time: Sep 18, 2021 12:36:53.388907000
    [Time delta from previous captured frame: 0.000004000 seconds]
    [Time delta from previous displayed frame: 0.000004000 seconds]
    [Time since reference or first frame: 0.000004000 seconds]
    Frame Number: 2
    Frame Length: 66 bytes
    Capture Length: 66 bytes
    [Frame is marked: False]
    [Protocols in frame: eth:arp]
Ethernet II, Src: 48:57:02:cc:ae:a0 (48:57:02:cc:ae:a0), Dst: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
    Destination: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
        Address: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
        .... ...1 .... .... .... .... = IG bit: Group address (multicast/broadcast)
        .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
    Source: 48:57:02:cc:ae:a0 (48:57:02:cc:ae:a0)
        Address: 48:57:02:cc:ae:a0 (48:57:02:cc:ae:a0)
        .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
        .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
    Type: ARP (0x0806)
    Trailer: 0000000000000000000000000000000000000000
    Frame check sequence: 0x00000000 [incorrect, should be 0x69fad3f5]
Address Resolution Protocol (request/gratuitous ARP)
    Hardware type: Ethernet (0x0001)
    Protocol type: IP (0x0800)
    Hardware size: 6
    Protocol size: 4
    Opcode: request (0x0001)
    [Is gratuitous: True]
    Sender MAC address: 48:57:02:cc:ae:a0 (48:57:02:cc:ae:a0)
    Sender IP address: 10.20.35.142 (10.20.35.142)
    Target MAC address: 00:00:00:00:00:00 (00:00:00:00:00:00)
    Target IP address: 10.20.35.142 (10.20.35.142)

^CFrame 3 (66 bytes on wire, 66 bytes captured)
    Arrival Time: Sep 18, 2021 12:36:54.391372000
    [Time delta from previous captured frame: 1.002465000 seconds]
    [Time delta from previous displayed frame: 1.002465000 seconds]
    [Time since reference or first frame: 1.002469000 seconds]
    Frame Number: 3
    Frame Length: 66 bytes
    Capture Length: 66 bytes
    [Frame is marked: False]
    [Protocols in frame: eth:arp]
Ethernet II, Src: 48:57:02:cc:ae:a0 (48:57:02:cc:ae:a0), Dst: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
    Destination: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
        Address: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
        .... ...1 .... .... .... .... = IG bit: Group address (multicast/broadcast)
        .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
    Source: 48:57:02:cc:ae:a0 (48:57:02:cc:ae:a0)
        Address: 48:57:02:cc:ae:a0 (48:57:02:cc:ae:a0)
        .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
        .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
    Type: ARP (0x0806)
    Trailer: 0000000000000000000000000000000000000000
    Frame check sequence: 0x00000000 [incorrect, should be 0x69fad3f5]
Address Resolution Protocol (request/gratuitous ARP)
    Hardware type: Ethernet (0x0001)
    Protocol type: IP (0x0800)
    Hardware size: 6
    Protocol size: 4
    Opcode: request (0x0001)
    [Is gratuitous: True]
    Sender MAC address: 48:57:02:cc:ae:a0 (48:57:02:cc:ae:a0)
    Sender IP address: 10.20.35.142 (10.20.35.142)
    Target MAC address: 00:00:00:00:00:00 (00:00:00:00:00:00)
    Target IP address: 10.20.35.142 (10.20.35.142)

Кладем порт на mgmt порт на sw21 и меняем адреса

[~sw21]     
#14/active/linkDown/Major/occurredTime:2021-09-18 13:07:00 03:00/-/-/alarmID:0x08520003/CID=0x807a0404:The interface status changes. (ifName=MEth0/0/0, AdminStatus=UP, OperStatus=DOWN, Reason=Interface physical link is down, mainIfname=MEth0/0/0)

Sep 18 2021 13:07:00 03:00 sw21 %IFNET/2/linkDown_active(l):CID=0x807a0404-alarmID=0x08520003;The interface status changes. (ifName=MEth0/0/0, AdminStatus=UP, OperStatus=DOWN, Reason=Interface physical link is down, mainIfname=MEth0/0/0)

#15/active/L3V_TRAP_VRF_DOWN/Major/occurredTime:2021-09-18 13:07:00 03:00/-/-/alarmID:0x09110000/CID=0x806f2717:The interface bound to the VPN instance went Down. (VpnInstanceName=VRF-DAD-1, IfName=MEth0/0/0, IfCurRowStatus=2, VRFOperationStatus=2)

Sep 18 2021 13:07:00 03:00 sw21 %L3VPN/2/L3V_TRAP_VRF_DOWN_active(l):CID=0x806f2717-alarmID=0x09110000;The interface bound to the VPN instance went Down. (VpnInstanceName=VRF-DAD-1, IfName=MEth0/0/0, IfCurRowStatus=2, VRFOperationStatus=2)

<sw21>dis dfs-group 1 m-lag 
*                : Local node
Heart beat state : Lost
Node 1 *                            
  Dfs-Group ID   : 1
  Priority       : 150
  Address        : ip address 10.70.70.32 vpn-instance VRF-DAD-1
  State          : Master
  Causation      : PEERLINKDOWN 
  System ID      : 4857-02cc-aef1 
  SysName        : sw21 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI
<sw21>

[*sw21]dis configuration candidate 
dfs-group 1
 undo source ip
 source ip 10.20.35.141 vpn-instance VRF-DAD-1
interface MEth 0/0/0
 ip address 10.20.35.141 24

...
commit
...

<sw21>dis dfs-group 1 m-lag 
*                : Local node
Heart beat state : Lost
Node 1 *                            
  Dfs-Group ID   : 1
  Priority       : 150
  Address        : ip address 10.20.35.141 vpn-instance VRF-DAD-1
  State          : Master
  Causation      : PEERLINKDOWN 
  System ID      : 4857-02cc-aef1 
  SysName        : sw21 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI

Поднимаем PL порты

<sw21>dis dfs-group 1 m-lag 
*                : Local node
Heart beat state : Lost
Node 1 *                            
  Dfs-Group ID   : 1
  Priority       : 150
  Address        : ip address 10.20.35.141 vpn-instance VRF-DAD-1
  State          : Master
  Causation      : TIMEOUT 
  System ID      : 4857-02cc-aef1 
  SysName        : sw21 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI

#10/cleared/hwLocalFaultAlarm/Minor/occurredTime:2021-09-18 12:17:00 03:00/clearTime:2021-09-18 13:14:24 03:00/clearType:service_resume/alarmID:0x081320c6/CID=0x80fc0101:The local fault alarm has resumed.(IfIndex=55, IfName=40GE1/0/3)

Sep 18 2021 13:14:24 03:00 sw21 %DEVM/3/hwLocalFaultAlarm_clear(l):CID=0x80fc0101-alarmID=0x081320c6-clearType=service_resume;The local fault alarm has resumed.(IfIndex=55, IfName=40GE1/0/3)

#9/cleared/linkDown/Major/occurredTime:2021-09-18 12:17:00 03:00/clearTime:2021-09-18 13:14:24 03:00/clearType:service_resume/alarmID:0x08520003/CID=0x807a0404:The interface status changes. (ifName=Eth-Trunk0, AdminStatus=UP, OperStatus=UP, Reason=Interface physical link is up, mainIfname=Eth-Trunk0)

#11/cleared/linkDown/Major/occurredTime:2021-09-18 12:17:00 03:00/clearTime:2021-09-18 13:14:24 03:00/clearType:service_resume/alarmID:0x08520003/CID=0x807a0404:The interface status changes. (ifName=40GE1/0/3, AdminStatus=UP, OperStatus=UP, Reason=Interface physical link is up, mainIfname=Eth-Trunk0)

Sep 18 2021 13:14:24 03:00 sw21 %IFNET/2/linkDown_clear(l):CID=0x807a0404-alarmID=0x08520003-clearType=service_resume;The interface status changes. (ifName=Eth-Trunk0, AdminStatus=UP, OperStatus=UP, Reason=Interface physical link is up, mainIfname=Eth-Trunk0)

Sep 18 2021 13:14:24 03:00 sw21 %IFNET/2/linkDown_clear(l):CID=0x807a0404-alarmID=0x08520003-clearType=service_resume;The interface status changes. (ifName=40GE1/0/3, AdminStatus=UP, OperStatus=UP, Reason=Interface physical link is up, mainIfname=Eth-Trunk0)

#12/cleared/hwLacpNegotiateFailed/Major/occurredTime:2021-09-18 12:17:00 03:00/clearTime:2021-09-18 13:14:25 03:00/clearType:service_resume/alarmID:0x09360000/CID=0x807a0404:Link negotiation failure is resumed. (TrunkIndex=0, PortIfIndex=55, TrunkId=0, TrunkName=Eth-Trunk0, PortName=40GE1/0/3, Reason=The link fault was rectified and negotiation information was synchronized.)

#13/cleared/hwLacpTotalLinkLoss/Major/occurredTime:2021-09-18 12:17:01 03:00/clearTime:2021-09-18 13:14:25 03:00/clearType:service_resume/alarmID:0x09360001/CID=0x807a0404:Link bandwidth lost totally is resumed. (TrunkIndex=0, TrunkIfIndex=58, TrunkId=0, TrunkName=Eth-Trunk0, Reason=Link is selected.)

Sep 18 2021 13:14:25 03:00 sw21 %LACP/2/hwLacpNegotiateFailed_clear(l):CID=0x807a0404-alarmID=0x09360000-clearType=service_resume;Link negotiation failure is resumed. (TrunkIndex=0, PortIfIndex=55, TrunkId=0, TrunkName=Eth-Trunk0, PortName=40GE1/0/3, Reason=The link fault was rectified and negotiation information was synchronized.)

Sep 18 2021 13:14:25 03:00 sw21 %LACP/2/hwLacpTotalLinkLoss_clear(l):CID=0x807a0404-alarmID=0x09360001-clearType=service_resume;Link bandwidth lost totally is resumed. (TrunkIndex=0, TrunkIfIndex=58, TrunkId=0, TrunkName=Eth-Trunk0, Reason=Link is selected.)

<sw21>dis dfs-group 1 m-lag 
*                : Local node
Heart beat state : Lost
Node 1 *                            
  Dfs-Group ID   : 1
  Priority       : 150
  Address        : ip address 10.20.35.141 vpn-instance VRF-DAD-1
  State          : Master
  Causation      : - 
  System ID      : 4857-02cc-aef1 
  SysName        : sw21 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI
Node 2                            
  Dfs-Group ID   : 1
  Priority       : 120
  Address        : ip address 10.20.35.142 vpn-instance VRF-DAD-1
  State          : Backup
  Causation      : - 
  System ID      : 4857-02cc-aea1 
  SysName        : sw22 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI
<sw21>

<sw21>dis dfs-group 1 node 1 m-lag 
* - Local node

M-Lag ID     : 16
Interface    : Eth-Trunk 16
Port State   : Up
Status       : active(*)-inactive

<sw21>dis dfs-group 1 node 2 m-lag 
* - Local node

M-Lag ID     : 16
Interface    : Eth-Trunk 16
Port State   : Down
Status       : inactive-active(*)

Поднимаем mgmt порт sw21.
Поднялся DAD линк.

<sw21>
#8/cleared/hwMLagHeartLost/Warning/occurredTime:2021-09-18 12:11:34 03:00/clearTime:2021-09-18 13:29:08 03:00/clearType:service_resume/alarmID:0x0ae52002/CID=0x81de271c:DFS dual-active detection message forwarding is resumed.

Sep 18 2021 13:29:08 03:00 sw21 %ETRUNK/4/hwMLagHeartLost_clear(l):CID=0x81de271c-alarmID=0x0ae52002-clearType=service_resume;DFS dual-active detection message forwarding is resumed.

#14/cleared/linkDown/Major/occurredTime:2021-09-18 13:07:00 03:00/clearTime:2021-09-18 13:29:06 03:00/clearType:service_resume/alarmID:0x08520003/CID=0x807a0404:The interface status changes. (ifName=MEth0/0/0, AdminStatus=UP, OperStatus=UP, Reason=Interface physical link is up, mainIfname=MEth0/0/0)

Sep 18 2021 13:29:06 03:00 sw21 %IFNET/2/linkDown_clear(l):CID=0x807a0404-alarmID=0x08520003-clearType=service_resume;The interface status changes. (ifName=MEth0/0/0, AdminStatus=UP, OperStatus=UP, Reason=Interface physical link is up, mainIfname=MEth0/0/0)

#15/cleared/L3V_TRAP_VRF_DOWN/Major/occurredTime:2021-09-18 13:07:00 03:00/clearTime:2021-09-18 13:29:06 03:00/clearType:service_resume/alarmID:0x09110000/CID=0x806f2717:The interface bound to the VPN instance went Up. (VpnInstanceName=VRF-DAD-1, IfName=MEth0/0/0, IfCurRowStatus=1, VRFOperationStatus=1)

Sep 18 2021 13:29:06 03:00 sw21 %L3VPN/2/L3V_TRAP_VRF_DOWN_clear(l):CID=0x806f2717-alarmID=0x09110000-clearType=service_resume;The interface bound to the VPN instance went Up. (VpnInstanceName=VRF-DAD-1, IfName=MEth0/0/0, IfCurRowStatus=1, VRFOperationStatus=1)


<sw21>dis dfs-group 1 m-lag 
*                : Local node
Heart beat state : OK
Node 1 *                            
  Dfs-Group ID   : 1
  Priority       : 150
  Address        : ip address 10.20.35.141 vpn-instance VRF-DAD-1
  State          : Master
  Causation      : - 
  System ID      : 4857-02cc-aef1 
  SysName        : sw21 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI
Node 2                            
  Dfs-Group ID   : 1
  Priority       : 120
  Address        : ip address 10.20.35.142 vpn-instance VRF-DAD-1
  State          : Backup
  Causation      : - 
  System ID      : 4857-02cc-aea1 
  SysName        : sw22 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI

Мастер свитч начал слать свои ARP.

@r13:~$ monitor interfaces ethernet eth3 traffic        
Capturing traffic on eth3 ...
  0.000000 48:57:02:cc:ae:f0 -> ff:ff:ff:ff:ff:ff ARP Gratuitous ARP for 10.20.35.141 (Request)
  0.000004 48:57:02:cc:ae:f0 -> ff:ff:ff:ff:ff:ff ARP Gratuitous ARP for 10.20.35.141 (Request)
  1.006338 48:57:02:cc:ae:f0 -> ff:ff:ff:ff:ff:ff ARP Gratuitous ARP for 10.20.35.141 (Request)
  1.006342 48:57:02:cc:ae:f0 -> ff:ff:ff:ff:ff:ff ARP Gratuitous ARP for 10.20.35.141 (Request)
  2.005912 48:57:02:cc:ae:f0 -> ff:ff:ff:ff:ff:ff ARP Gratuitous ARP for 10.20.35.141 (Request)
  2.005917 48:57:02:cc:ae:f0 -> ff:ff:ff:ff:ff:ff ARP Gratuitous ARP for 10.20.35.141 (Request)
@r13:~$ monitor interfaces ethernet eth3 traffic detail 
Capturing traffic on eth3 ...
Frame 1 (66 bytes on wire, 66 bytes captured)
    Arrival Time: Sep 18, 2021 13:30:45.005576000
    [Time delta from previous captured frame: 0.000000000 seconds]
    [Time delta from previous displayed frame: 0.000000000 seconds]
    [Time since reference or first frame: 0.000000000 seconds]
    Frame Number: 1
    Frame Length: 66 bytes
    Capture Length: 66 bytes
    [Frame is marked: False]
    [Protocols in frame: eth:arp]
Ethernet II, Src: 48:57:02:cc:ae:f0 (48:57:02:cc:ae:f0), Dst: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
    Destination: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
        Address: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
        .... ...1 .... .... .... .... = IG bit: Group address (multicast/broadcast)
        .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
    Source: 48:57:02:cc:ae:f0 (48:57:02:cc:ae:f0)
        Address: 48:57:02:cc:ae:f0 (48:57:02:cc:ae:f0)
        .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
        .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
    Type: ARP (0x0806)
    Trailer: 0000000000000000000000000000000000000000
    Frame check sequence: 0x00000000 [incorrect, should be 0xed2877af]
Address Resolution Protocol (request/gratuitous ARP)
    Hardware type: Ethernet (0x0001)
    Protocol type: IP (0x0800)
    Hardware size: 6
    Protocol size: 4
    Opcode: request (0x0001)
    [Is gratuitous: True]
    Sender MAC address: 48:57:02:cc:ae:f0 (48:57:02:cc:ae:f0)
    Sender IP address: 10.20.35.141 (10.20.35.141)
    Target MAC address: 00:00:00:00:00:00 (00:00:00:00:00:00)
    Target IP address: 10.20.35.141 (10.20.35.141)

Frame 2 (66 bytes on wire, 66 bytes captured)
    Arrival Time: Sep 18, 2021 13:30:45.005580000
    [Time delta from previous captured frame: 0.000004000 seconds]
    [Time delta from previous displayed frame: 0.000004000 seconds]
    [Time since reference or first frame: 0.000004000 seconds]
    Frame Number: 2
    Frame Length: 66 bytes
    Capture Length: 66 bytes
    [Frame is marked: False]
    [Protocols in frame: eth:arp]
Ethernet II, Src: 48:57:02:cc:ae:f0 (48:57:02:cc:ae:f0), Dst: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
    Destination: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
        Address: ff:ff:ff:ff:ff:ff (ff:ff:ff:ff:ff:ff)
        .... ...1 .... .... .... .... = IG bit: Group address (multicast/broadcast)
        .... ..1. .... .... .... .... = LG bit: Locally administered address (this is NOT the factory default)
    Source: 48:57:02:cc:ae:f0 (48:57:02:cc:ae:f0)
        Address: 48:57:02:cc:ae:f0 (48:57:02:cc:ae:f0)
        .... ...0 .... .... .... .... = IG bit: Individual address (unicast)
        .... ..0. .... .... .... .... = LG bit: Globally unique address (factory default)
    Type: ARP (0x0806)
    Trailer: 0000000000000000000000000000000000000000
    Frame check sequence: 0x00000000 [incorrect, should be 0xed2877af]
Address Resolution Protocol (request/gratuitous ARP)
    Hardware type: Ethernet (0x0001)
    Protocol type: IP (0x0800)
    Hardware size: 6
    Protocol size: 4
    Opcode: request (0x0001)
    [Is gratuitous: True]
    Sender MAC address: 48:57:02:cc:ae:f0 (48:57:02:cc:ae:f0)
    Sender IP address: 10.20.35.141 (10.20.35.141)
    Target MAC address: 00:00:00:00:00:00 (00:00:00:00:00:00)
    Target IP address: 10.20.35.141 (10.20.35.141)

Поднимаем MLAG порты на sw22.
Все хорошо, все поднялос.

<sw22>dis dfs-group 1 m-lag 
*                : Local node
Heart beat state : OK
Node 2 *                            
  Dfs-Group ID   : 1
  Priority       : 120
  Address        : ip address 10.20.35.142 vpn-instance VRF-DAD-1
  State          : Backup
  Causation      : - 
  System ID      : 4857-02cc-aea1 
  SysName        : sw22 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI
Node 1                            
  Dfs-Group ID   : 1
  Priority       : 150
  Address        : ip address 10.20.35.141 vpn-instance VRF-DAD-1
  State          : Master
  Causation      : - 
  System ID      : 4857-02cc-aef1 
  SysName        : sw21 
  Version        : V200R002C50SPC800 
  Device Type    : CE6810LI

<sw22>dis dfs-group 1 node 1 m-lag 
* - Local node

M-Lag ID     : 16
Interface    : Eth-Trunk 16
Port State   : Up
Status       : active-active(*)

<sw22>dis dfs-group 1 node 2 m-lag 
* - Local node

M-Lag ID     : 16
Interface    : Eth-Trunk 16
Port State   : Up
Status       : active(*)-active