VRRP HSB Becomes Ineffective

Common Causes

Common causes are as follows:

• The active and standby ACs fail to set up a link.
• The HSB service is not correctly configured.
• The VRRP virtual address is not configured.
• The source address is not configured.
• HSB is not enabled.

Troubleshooting Flowchart

Troubleshooting Procedure (Web NMS)

1. Check whether the HSB channel between the two ACs works properly.

   Log in to the active AC and check whether the link between the active and standby ACs is normal.

   Choose Configuration > Backup Settings > Backup Settings > Backup Configuration > VRRP hot backup and check whether the HSB channel is normal.

2. Check whether the HSB service is correctly configured on the active and standby ACs according to step 1.

   To back up AP information, the ACs must be bound to the AP module. To back up STA information, the ACs must be bound to the access-user module.

   Log in to the active and standby ACs to check the bound service type.

3. Check whether the virtual IP address of the VRRP group is configured on the active and standby ACs.

   Log in to the active and standby ACs to check the VRRP status and virtual address.

   Choose Configuration > Backup Settings > Backup Settings > VRRP List.

4. Check whether the source IP address is configured.

   Choose Configuration > AC Config > Basic Config > AC Configuration. If you select IP Address for AC source address, the value is displayed. If you select VLANIF for AC source address, check the IP address of the VLANIF interface.

5. Check whether the HSB function is enabled.

   Choose Configuration > Backup Settings > Backup Settings > Backup Configuration > VRRP hot backup and check whether the HSB channel is normal.

6. Collect the following information and contact Huawei technical support personnel.

   The log file can be exported through the web NMS. For details about diagnosis commands or file operations, see the following section.

   Choose Maintenance > Log >View AC Logs > Export and export AC logs.

Troubleshooting Procedure (CLI)

1. Check whether the HSB channel between the two ACs works properly.

   Log in to the active AC and check whether the link between the active and standby ACs is normal.

   Run the display hsb-service 0 command to check whether the link status is Connected. Connected: The link is normal. Disconnected: The link is terminated.

   Check the link and ensure that the link is in Connected state.

   [AC20] display hsb-service 0
   Hot Standby Service Information:
   ----------------------------------------------------------
     Local IP Address       : 10.1.1.1
     Peer IP Address        : 10.1.1.2
     Source Port            : 10241
     Destination Port       : 10242
     Keep Alive Times       : 5
     Keep Alive Interval    : 2
     Service State          : Connected
     Service Batch Modules  :
   ----------------------------------------------------------

2. Check HSB configurations on the active and standby ACs according to 1.

   To back up AP information, the ACs must be bound to the AP module. To back up STA information, the ACs must be bound to the access-user module.

   Log in to the active and standby ACs to check the bound service type.

3. Check whether the virtual IP address of the VRRP group is configured on the active and standby ACs.

   Log in to the active and standby ACs to check the VRRP status and virtual address.

   Run the display vrrp brief command to check the configuration.

   [AC20] display vrrp brief
   Total:1     Master:1     Backup:0     Non-active:0
   VRID  State        Interface                Type     Virtual IP
   ---------------------------------------------------------------- 
   2     Master       Vlanif1360               Normal   10.1.1.6

4. Check whether the source IP address is configured.

   Run the display capwap configuration command. Check the value of Source ip-address.

   [AC20] display capwap configuration
     ------------------------------------------------------------ 
     Source interface                            : - 
     Source ip-address                           : 10.1.1.111 
     Echo interval(seconds)                      : 25
     Echo times                                  : 6
     Control priority(server to client)          : 7
     Control priority(client to server)          : 7
     Control-link DTLS encrypt                   : disable
     DTLS PSK value                              : ******
     PSK mandatroy match switch                  : enable
     Control-link inter-controller DTLS encrypt  : disable
     Inter-controller DTLS PSK value             : ******
     IPv6 status                                 : disable 
     ------------------------------------------------------------

5. Check whether the HSB function is enabled.

   Run the display this command in the HSB group view.

   [AC20-hsb-group-0] display this
   #
   hsb-group 0
    track vrrp vrid 2 interface Vlanif1360
    bind-service 0
    hsb enable
   #
   return

6. Collect the following information and contact Huawei technical support personnel.

   Run the following commands to collect device information.

   Command	Function
   <AC6605> display hsb statistics hsb-group 0 event <AC6605> display hsb statistics hsb-service 0 event	Enter the user view and collect HSB events.
   <AC6605> display hsb statistics hsb-service 0 packet	Enter the user view and collect HSB packets.
   [AC6605-diagnose] display wlan debuginfo type 1 from 0 to 1000	Enter the user view and collect WDEV logs.
   [AC6605-diagnose] display wlan debuginfo type 8 from 0 to 1000	Enter the user view and collect WSRV logs.
   <AC6605> save logfile	Save diagnosis logs.
   [AC6605-diagnose] info-center create logbook xx.xml	Create a dictionary file of diagnosis logs.