Example for Configuring MAD in Relay Mode

Procedure

1. On the stack, configure MAD in relay mode on the inter-device Eth-Trunk.

   <HUAWEI> system-view
   [HUAWEI] interface eth-trunk 1
   [HUAWEI-Eth-Trunk1] mad detect mode relay
   [HUAWEI-Eth-Trunk1] quit
   [HUAWEI] interface gigabitethernet 0/0/5
   [HUAWEI-GigabitEthernet0/0/5] eth-trunk 1
   [HUAWEI-GigabitEthernet0/0/5] quit
   [HUAWEI] interface gigabitethernet 1/0/5
   [HUAWEI-GigabitEthernet1/0/5] eth-trunk 1
   [HUAWEI-GigabitEthernet1/0/5] quit
   [HUAWEI] interface gigabitethernet 2/0/5
   [HUAWEI-GigabitEthernet2/0/5] eth-trunk 1
   [HUAWEI-GigabitEthernet2/0/5] quit
   [HUAWEI] quit

2. Configure the MAD relay function on the relay agent.

   <HUAWEI> system-view
   [HUAWEI] sysname SwitchD
   [SwitchD] interface eth-trunk 1
   [SwitchD-Eth-Trunk1] mad relay
   [SwitchD-Eth-Trunk1] quit
   [SwitchD] interface gigabitethernet 0/0/1
   [SwitchD-GigabitEthernet0/0/1] eth-trunk 1
   [SwitchD-GigabitEthernet0/0/1] quit
   [SwitchD] interface gigabitethernet 0/0/2
   [SwitchD-GigabitEthernet0/0/2] eth-trunk 1
   [SwitchD-GigabitEthernet0/0/2] quit
   [SwitchD] interface gigabitethernet 0/0/3
   [SwitchD-GigabitEthernet0/0/3] eth-trunk 1
   [SwitchD-GigabitEthernet0/0/3] quit
   [SwitchD] quit

3. Verify the configuration.

   # Check detailed MAD configuration of the stack.

   <HUAWEI> display mad verbose
   Current MAD domain: 0 
   Current MAD status: Detect                                                      
   Mad direct detect interfaces configured:                                
   Mad relay detect interfaces configured:                                 
    Eth-Trunk1                                                                  
   Excluded ports(configurable):                                                   
   Excluded ports(can not be configured):
    GigabitEthernet0/0/26                                          
    GigabitEthernet0/0/27
    GigabitEthernet1/0/26                                          
    GigabitEthernet1/0/27                                          
    GigabitEthernet2/0/26                                          
    GigabitEthernet2/0/27                                          
   

   # Check MAD relay configuration on SwitchD.

   <SwitchD> display mad proxy
   Mad relay interfaces configured:                                        
    Eth-Trunk1 
   

4. Verify the MAD function.
   After the MAD function has been configured successfully:

   • The system can generate an alarm of MAD_1.3.6.1.4.1.2011.5.25.246.1.1 hwMadConflictDetect if the stack splits.
   • When the stack recovers, the system generates an alarm of MAD_1.3.6.1.4.1.2011.5.25.246.1.2 hwMadConflictResume.

   If no service is configured in the stack, perform the following steps to check whether the MAD function has been configured successfully:

   1. Enable the alarm display function in the user view.

      <HUAWEI> terminal monitor
      <HUAWEI> terminal trapping

   2. Simulate a stack split situation by removing the stack cables that connect SwitchB to SwitchC and SwitchC to SwitchA. If the stack is set up through service port connections, you can also run the shutdown interface command to shut down the physical member ports in the logical stack port view that connect SwitchB to SwitchC and SwitchC to SwitchA.
   3. After the stack splits, you can see the following alarm on the terminal: MAD/4/MULTIACTIVEDETECTED:OID 1.3.6.1.4.1.2011.5.25.246.1.1 Multi-active scenario is detected.
   4. Check whether the number of member switches decreases.

      Run the display device command, and you can see that the number of member switches decreases from 3 to 2. (In this example, the member switches are S5720-28P-LI-AC.)

      <HUAWEI> display device
      S5720-28P-LI-AC's Device status:
      Slot Sub  Type                Online    Power      Register     Status   Role
      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      0    -   S5720-28P-LI         Present   PowerOn    Registered   Normal   Master
      1    -   S5720-28P-LI         Present   PowerOn    Registered   Normal   Standby

   5. The preceding operations verify that the MAD function has been configured successfully.
   6. Connect the stack cables again or run the undo shutdown command to enable the physical member ports, so that the stack can be set up again.
   7. After the stack is set up again, you can see the following alarm on the terminal: MAD/4/MULTIACTIVEMERGE:OID 1.3.6.1.4.1.2011.5.25.246.1.2 Multi-active scenario is merged.
   8. Check whether the number of member switches restores to the original value.

      Run the display device command, and you can see that the number of member switches changes to 3. (In this example, the member switches are S5720-28P-LI-AC.)

      <HUAWEI> display device
      S5720-28P-LI-AC's Device status:
      Slot Sub  Type                Online    Power      Register     Status   Role
      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
      0    -   S5720-28P-LI         Present   PowerOn    Registered   Normal   Master
      1    -   S5720-28P-LI         Present   PowerOn    Registered   Normal   Standby
      2    -   S5720-28P-LI         Present   PowerOn    Registered   Normal   Slave