Example for Configuring Wireless Configuration Synchronization in VRRP HSB Scenarios

WLAN V200R019C00 Typical Configuration Examples

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Service Requirements

To ensure that services are running normally, an enterprise wants to improve network reliability while reducing the configuration maintenance workload. Wireless configuration synchronization can be deployed in VRRP HSB to meet this requirement. In this solution, the master and backup ACs are often deployed in the same location, and the service switchover is fast and has higher reliability than dual-link HSB.

Networking Requirements

AC networking mode: Layer 2 networking in bypass mode
DHCP deployment mode: The AC functions as a DHCP server to assign IP addresses to APs, and a CSS functions as a DHCP server to assign IP addresses to STAs.
Service data forwarding mode: direct forwarding
Switch cluster: A cluster is set up using CSS cards, containing SwitchB and SwitchC at the core layer. SwitchB is the master switch, and SwitchC is the standby switch.

Figure 5-44 Networking for configuring wireless configuration synchronization in VRRP HSB scenarios (direct forwarding)

Data Planning

Table 5-46 AC data planning

Item	Data
AC1's source interface	Virtual IP address: 10.23.100.3/24
AC2's source interface	Virtual IP address: 10.23.100.3/24
Virtual IP address of the management VRRP group	10.23.100.3/24
VAP profile	Name: wlan-net Forwarding mode: direct forwarding Service VLAN: VLAN 101 Referenced profiles: security profile wlan-net and SSID profile wlan-net
AP group	Name: ap-group1 Referenced profiles: VAP profile wlan-net and regulatory domain profile default
Regulatory domain profile	Name: default Country code: CN
SSID profile	Name: wlan-net SSID name: wlan-net
Security profile	Name: wlan-net Security policy: WPA-WPA2+PSK+AES Password: a1234567
DHCP server	The AC functions as the DHCP server to assign IP addresses to APs, and a CSS functions as the DHCP server to assign IP addresses to STAs.
Gateway for APs	VLANIF 100: 10.23.100.3/24
IP address pool for APs	10.23.100.4-10.23.100.254/24
Gateway for STAs	VLANIF 101: 10.23.101.1/24
IP address pool for STAs	10.23.101.2-10.23.101.254/24
IP address and port number of the HSB channel for AC1	IP address: 10.23.102.1/24 of VLANIF 102 Port number: 10241
IP address and port number of the HSB channel for AC2	IP address: 10.23.102.2/24 of VLANIF 102 Port number: 10241
Scheduled wireless configuration synchronization	Start time of scheduled synchronization: 01:00 Interval for scheduled synchronization: 1440 minutes

Configuration Roadmap

Configure a cluster between SwitchB and SwitchC through cluster cards to improve the core layer reliability and configure SwitchB as the master switch.
Configure SwitchA, SwitchB, and SwitchC to communicate with each other.
Configure AC1 based on the configuration wizard. VRRP HSB and wireless configuration synchronization are both configured following the configuration wizard.
Configure APs to go online and basic WLAN services on AC1.
Configure AC2 following the configuration wizard.
Trigger wireless configuration synchronization manually on AC1.

Configuration Notes

No ACK mechanism is provided for multicast packet transmission on air interfaces. In addition, wireless links are unstable. To ensure stable transmission of multicast packets, they are usually sent at low rates. If a large number of such multicast packets are sent from the network side, the air interfaces may be congested. You are advised to configure multicast packet suppression to reduce impact of a large number of low-rate multicast packets on the wireless network. Exercise caution when configuring the rate limit; otherwise, the multicast services may be affected.
- In direct forwarding mode, you are advised to configure multicast packet suppression on switch interfaces connected to APs.
- In tunnel forwarding mode, you are advised to configure multicast packet suppression in traffic profiles of the AC.
For details on how to configure traffic suppression, see How Do I Configure Multicast Packet Suppression to Reduce Impact of a Large Number of Low-Rate Multicast Packets on the Wireless Network?.
Configure port isolation on the interfaces of the device directly connected to APs. If port isolation is not configured and direct forwarding is used, a large number of unnecessary broadcast packets may be generated in the VLAN, blocking the network and degrading user experience.
In tunnel forwarding mode, the management VLAN and service VLAN cannot be the same. Only packets from the management VLAN are transmitted between the AC and APs. Packets from the service VLAN are not allowed between the AC and APs.
During the configuration, check whether loops occur on the wired network. If so, configure MSTP on corresponding NEs.
In the VRRP HSB networking, the configurations of the DHCP address pools on the master and backup ACs must be consistent. For example, the ranges of IP addresses that cannot be automatically assigned to clients in the DHCP address pools must be consistent.

Procedure

Establish a cluster using CSS card.

# Set the CSS ID, CSS priority, and CSS connection mode to 1, 100, and CSS card connection for SwitchB.

<HUAWEI> system-view
[HUAWEI] sysname SwitchB
[SwitchB] set css mode css-card
[SwitchB] set css id 1
[SwitchB] set css priority 100

# Set the CSS ID, CSS priority, and CSS connection mode to 2, 10, and CSS card connection for SwitchC.

<HUAWEI> system-view
[HUAWEI] sysname SwitchC
[SwitchC] set css mode css-card
[SwitchC] set css id 2
[SwitchC] set css priority 10

# Check the CSS configuration on SwitchB.

[SwitchB] display css status saved
Current Id   Saved Id     CSS Enable   CSS Mode    Priority    Master force     
------------------------------------------------------------------------------  
1            1            Off          CSS card    100         Off

# Check the CSS configuration on SwitchC.

[SwitchC] display css status saved
Current Id   Saved Id     CSS Enable   CSS Mode    Priority    Master force     
------------------------------------------------------------------------------  
1            2            Off          CSS card    10          Off

# Enable the CSS function on SwitchB and restart SwitchB.

[SwitchB] css enable
Warning: The CSS configuration will take effect only after the system is rebooted. T
he next CSS mode is CSS card. Reboot now? [Y/N]:y

# Enable the CSS function on SwitchC and restart SwitchC.

[SwitchC] css enable
Warning: The CSS configuration will take effect only after the system is rebooted. T
he next CSS mode is CSS card. Reboot now? [Y/N]:y

# Log in to the CSS through the console port on any MPU to check whether the CSS is established successfully.

<SwitchB> display device
Chassis 1 (Master Switch)
S12708's Device status:
Slot  Sub Type         Online    Power      Register       Status     Role  
-------------------------------------------------------------------------------
1     -   ET1D2SFUD000 Present   PowerOn    Registered     Normal     NA    
      1   EH1D2VS08000 Present   PowerOn    Registered     Normal     NA    
5     -   ET1D2G48SEC0 Present   PowerOn    Registered     Normal     NA    
7     -   ET1D2X16SSC0 Present   PowerOn    Registered     Normal     NA    
9     -   ET1D2MPUA000 Present   PowerOn    Registered     Normal     Slave 
10    -   ET1D2MPUA000 Present   PowerOn    Registered     Normal     Master
12    -   ET1D2SFUD000 Present   PowerOn    Registered     Normal     NA    
      1   EH1D2VS08000 Present   PowerOn    Registered     Normal     NA    
13    -   ET1D2SFUD000 Present   PowerOn    Registered     Normal     NA    
      1   EH1D2VS08000 Present   PowerOn    Registered     Normal     NA    
14    -   ET1D2SFUD000 Present   PowerOn    Registered     Normal     NA    
      1   EH1D2VS08000 Present   PowerOn    Registered     Normal     NA    
PWR1  -   -            Present   PowerOn    Registered     Normal     NA    
PWR2  -   -            Present   PowerOn    Registered     Normal     NA    
CMU2  -   EH1D200CMU00 Present   PowerOn    Registered     Normal     Master
FAN1  -   -            Present   PowerOn    Registered     Normal     NA    
FAN2  -   -            Present   PowerOn    Registered     Normal     NA    
FAN3  -   -            Present   PowerOn    Registered     Normal     NA    
FAN4  -   -            Present   PowerOn    Registered     Normal     NA    
Chassis 2 (Standby Switch)
S12708's Device status:
Slot  Sub Type         Online    Power      Register       Status     Role  
-------------------------------------------------------------------------------
1     -   ET1D2SFUD000 Present   PowerOn    Registered     Normal     NA    
      1   EH1D2VS08000 Present   PowerOn    Registered     Normal     NA    
3     -   ET1D2G48SEC0 Present   PowerOn    Registered     Normal     NA    
4     -   ET1D2X16SSC0 Present   PowerOn    Registered     Normal     NA    
9     -   ET1D2MPUA000 Present   PowerOn    Registered     Normal     Slave 
10    -   ET1D2MPUA000 Present   PowerOn    Registered     Normal     Master
12    -   ET1D2SFUD000 Present   PowerOn    Registered     Normal     NA    
      1   EH1D2VS08000 Present   PowerOn    Registered     Normal     NA    
13    -   ET1D2SFUD000 Present   PowerOn    Registered     Normal     NA    
      1   EH1D2VS08000 Present   PowerOn    Registered     Normal     NA    
14    -   ET1D2SFUD000 Present   PowerOn    Registered     Normal     NA    
      1   EH1D2VS08000 Present   PowerOn    Registered     Normal     NA    
PWR1  -   -            Present   PowerOn    Registered     Normal     NA    
PWR2  -   -            Present   PowerOn    Registered     Normal     NA    
CMU1  -   EH1D200CMU00 Present   PowerOn    Registered     Normal     Master
FAN1  -   -            Present   PowerOn    Registered     Normal     NA    
FAN2  -   -            Present   PowerOn    Registered     Normal     NA    
FAN3  -   -            Present   PowerOn    Registered     Normal     NA    
FAN4  -   -            Present   PowerOn    Registered     Normal     NA    
<SwitchB> display css status
CSS Enable switch On                                                            
                                                                                
Chassis Id   CSS Enable   CSS Status      CSS Mode    Priority    Master Force  
------------------------------------------------------------------------------  
1            On           Master          CSS card    100         Off           
2            On           Standby         CSS card    10          Off

The command output shows the card status and CSS status of both member switches, indicating that the CSS is established successfully.

# Check whether the cluster links are normal.

<SwitchB> display css channel
               Chassis 1               ||             Chassis 2                 
--------------------------------------------------------------------------------
Num      [Port]         [Speed]        ||        [Speed]         [Port]
 1       1/1/0/1        10G                      10G             2/1/0/1      
 2       1/1/0/2        10G                      10G             2/1/0/2      
 3       1/1/0/3        10G                      10G             2/1/0/3      
 4       1/1/0/4        10G                      10G             2/1/0/4      
 5       1/1/0/5        10G                      10G             2/1/0/5      
 6       1/1/0/6        10G                      10G             2/1/0/6      
 7       1/1/0/7        10G                      10G             2/1/0/7      
 8       1/1/0/8        10G                      10G             2/1/0/8      
 9       1/12/0/1       10G                      10G             2/12/0/1      
10       1/12/0/2       10G                      10G             2/12/0/2      
11       1/12/0/3       10G                      10G             2/12/0/3      
12       1/12/0/4       10G                      10G             2/12/0/4      
13       1/12/0/5       10G                      10G             2/12/0/5      
14       1/12/0/6       10G                      10G             2/12/0/6      
15       1/12/0/7       10G                      10G             2/12/0/7      
16       1/12/0/8       10G                      10G             2/12/0/8      
17       1/13/0/1       10G                      10G             2/13/0/1      
18       1/13/0/2       10G                      10G             2/13/0/2      
19       1/13/0/3       10G                      10G             2/13/0/3      
20       1/13/0/4       10G                      10G             2/13/0/4      
21       1/13/0/5       10G                      10G             2/13/0/5      
22       1/13/0/6       10G                      10G             2/13/0/6      
23       1/13/0/7       10G                      10G             2/13/0/7      
24       1/13/0/8       10G                      10G             2/13/0/8      
25       1/14/0/1       10G                      10G             2/14/0/1      
26       1/14/0/2       10G                      10G             2/14/0/2      
27       1/14/0/3       10G                      10G             2/14/0/3      
28       1/14/0/4       10G                      10G             2/14/0/4      
29       1/14/0/5       10G                      10G             2/14/0/5      
30       1/14/0/6       10G                      10G             2/14/0/6      
31       1/14/0/7       10G                      10G             2/14/0/7      
32       1/14/0/8       10G                      10G             2/14/0/8      
--------------------------------------------------------------------------------

The command output shows that all the cluster links are in Up state, indicating that the CSS has been established successfully.

Configure SwitchA, SwitchB, and SwitchC to ensure that APs and ACs can exchange CAPWAP packets.

If direct forwarding is used, configure port isolation on GE0/0/1 of SwitchA connected to the AP. If port isolation is not configured, many broadcast packets will be transmitted in the VLANs or WLAN users on different APs can directly communicate at Layer 2.

# On SwitchA, set the PVID of GE0/0/1 connected to the AP to management VLAN 100, add GE0/0/1 to VLAN 100 amd VLAN 101 (service VLAN), and add GE0/0/2 connected to SwitchB and GE0/0/3 connected to SwitchC to Eth-Trunk 10.

<HUAWEI> system-view
[HUAWEI] sysname SwitchA
[SwitchA] vlan batch 100 101
[SwitchA] interface gigabitethernet 0/0/1
[SwitchA-GigabitEthernet0/0/1] port link-type trunk
[SwitchA-GigabitEthernet0/0/1] port trunk pvid vlan 100
[SwitchA-GigabitEthernet0/0/1] undo port trunk allow-pass vlan 1
[SwitchA-GigabitEthernet0/0/1] port trunk allow-pass vlan 100 101
[SwitchA-GigabitEthernet0/0/1] port-isolate enable
[SwitchA-GigabitEthernet0/0/1] quit
[SwitchA] interface eth-trunk 10
[SwitchA-Eth-Trunk10] port link-type trunk
[SwitchA-Eth-Trunk10] undo port trunk allow-pass vlan 1
[SwitchA-Eth-Trunk10] port trunk allow-pass vlan 100 101
[SwitchA-Eth-Trunk10] quit
[SwitchA] interface gigabitethernet 0/0/2
[SwitchA-GigabitEthernet0/0/2] undo port link-type
[SwitchA-GigabitEthernet0/0/2] eth-trunk 10
[SwitchA-GigabitEthernet0/0/2] quit
[SwitchA] interface gigabitethernet 0/0/3
[SwitchA-GigabitEthernet0/0/3] undo port link-type
[SwitchA-GigabitEthernet0/0/3] eth-trunk 10
[SwitchA-GigabitEthernet0/0/3] quit

# Add GE1/1/0/2 on SwitchB and GE2/1/0/2 on SwitchC to Eth-Trunk 10, and add E1/1/0/1 on SwitchB and GE2/1/0/1 on SwitchC both to VLAN 100.

[SwitchB] sysname CSS
[CSS] vlan batch 100 101
[CSS] interface gigabitethernet 1/1/0/1
[CSS-GigabitEthernet1/1/0/1] port link-type trunk
[CSS-GigabitEthernet1/1/0/1] undo port trunk allow-pass vlan 1
[CSS-GigabitEthernet1/1/0/1] port trunk allow-pass vlan 100
[CSS-GigabitEthernet1/1/0/1] quit
[CSS] interface gigabitethernet 2/1/0/1
[CSS-GigabitEthernet2/1/0/1] port link-type trunk
[CSS-GigabitEthernet2/1/0/1] undo port trunk allow-pass vlan 1
[CSS-GigabitEthernet2/1/0/1] port trunk allow-pass vlan 100
[CSS-GigabitEthernet2/1/0/1] quit
[CSS] interface eth-trunk 10
[CSS-Eth-Trunk10] port link-type trunk
[CSS-Eth-Trunk10] undo port trunk allow-pass vlan 1
[CSS-Eth-Trunk10] port trunk allow-pass vlan 100 101
[CSS-Eth-Trunk10] quit
[CSS] interface gigabitethernet 1/1/0/2
[CSS-GigabitEthernet1/1/0/2] undo port link-type
[CSS-GigabitEthernet1/1/0/2] eth-trunk 10
[CSS-GigabitEthernet1/1/0/2] quit
[CSS] interface gigabitethernet 2/1/0/2
[CSS-GigabitEthernet2/1/0/2] undo port link-type
[CSS-GigabitEthernet2/1/0/2] eth-trunk 10
[CSS-GigabitEthernet2/1/0/2] quit

Configure a DHCP server.

# Configure the CSS as a DHCP server to assign IP addresses to STAs.

[CSS] dhcp enable
[CSS] interface vlanif 101
[CSS-Vlanif101] ip address 10.23.101.1 24
[CSS-Vlanif101] dhcp select interface
[CSS-Vlanif101] quit

Configure AC1.
1. Perform basic AC configurations.
  # Choose Configuration > Config Wizard > AC from the main menu. The Basic AC Configuration page is displayed.
  
  # Set Country/Region based on actual situations. For example, set Country/Region to China, System time to Manual, and Date and time to PC Time.
  
  # Click Next. The Port Configuration page is displayed.
2. Configure interfaces.
  # Select GigabitEthernet0/0/1 and expand Modify all. Set Interface type to Trunk and add GigabitEthernet0/0/1 to VLAN 100 (management VLAN).
  
  If the AC and APs are directly connected, set the default VLAN of the interfaces connected to the APs to management VLAN 100.
  
  # Click Apply.
  
  # Deselect GigabitEthernet0/0/1 and then select GigabitEthernet0/0/2. Add GigabitEthernet0/0/2 to VLAN 102 in the same way.
  
  # Click Next. The Network Interconnection Configuration page is displayed.
3. Configure network connectivity.
  # Click Create under Interface Configuration. The Create Interface Configuration page is displayed.
  
  # Set the IP address of VLANIF 100 to 10.23.100.1/24.
  
  # Click OK.
  
  # Click Create under DHCPv4 Address Pool List, set Address pool type to Interface address pool, and select VLANIF 100. Expand Advanced. Click to add 10.23.100.1 to 10.23.100.3 to Excluded IP address.
  
  Configure the DNS server address as required.
  
  # Click OK.
  
  # Set the IP address of VLANIF 102 to 10.23.102.1/24.
  
  # Click Next. The AC Backup Configuration page is displayed.
4. Configure AC backup.
  # Enable the HSB function.
  
  # Click Create. The Create VRID page is displayed.
  # Create an mVRRP group. Set parameters as follows:
  - VLANIF/IP: VLANIF100
  - VRID: 1
  - VRRP type: mVRRP group
  - Virtual IP address: 10.23.100.3
  - Priority: 120
  - Preemption delay(s): 1800
  # Click OK.
  # Configure HSB. Set the parameters as follows:
  - Local AC IP address: 10.23.102.1
  - Peer AC IP address: 10.23.102.2
  - Local port: 10241
  - Remote port: 10241
  - Associated VRID: 1
  # Enable wireless configuration synchronization and set PSK key.
  
  # Click Next. The AC Source Address page is displayed.
5. Configure the source address for AC1.
  # Set AC source address to IP address and set the IP address to 10.23.100.3.
  
  # Click Next. The Confirm Settings page is displayed.
6. Confirm the configuration.
  # Confirm the configuration and click Continue With AP Online.
Configure APs connected to AC1.
1. Configure APs to go online.
  # Click Batch Import. The Batch Import page is displayed. Click to download an AP template file to your local computer.
  # Fill in the template file with AP information according to the following example. To add multiple APs, fill in the file with information about the APs.
  - AP MAC: 60de-4476-e360
  - AP SN: 210235419610CB002287
  - AP Name: area_1
  - AP Group: ap-group1
  If you set AP authentication mode to MAC address authentication, the AP's MAC address is mandatory and the AP's SN is optional.
  If you set AP authentication mode to SN authentication, the AP's SN is mandatory and the AP's MAC address is optional.
  # Click next to Import AP File, select the template file with AP information, and click Import.
  
  # On the page that displays the template import result, click OK.
  
  # Click Next. The Group APs page is displayed.
2. Configure an AP group.
  # AP group information has been added in the template file. Click Next. The Confirm Configurations page is displayed.
3. Confirm the configuration.
  # Confirm the configuration and click Continue With Wireless Service Configuration.
Configure basic WLAN services on AC1.
1. Configure WLAN services.
  # Click Create. The Basic Information page is displayed.
  
  # Set the SSID name, forwarding mode, and service VLAN ID.
  
  # Click Next. The Security Authentication page is displayed.
  
  # Set Security settings to Key (applicable to personnel networks), select the AES mode, and set the key.
  
  # Click Next. The Access Control page is displayed.
  
  # Set Binding the AP group to ap-group1.
  
  # Click Finish.
Configure AC2.
1. Perform basic AC configurations.
  # Configure AC2 in the same way as that for configuring AC1.
2. Configure interfaces.
  # Configure AC2 in the same way as that for configuring AC1.
3. Configure network connectivity.
  # Configure AC2 in the same way as that for configuring AC1. The difference lies in the VLANIF interfaces' IP addresses (VLANIF 100: 10.23.100.2/24; VLANIF 102: 10.23.102.2/24).
4. Configure AC backup.
  # Configure AC2 in the same way as that for configuring AC1. The difference lies in the priority and preemption delay (s). When configuring a VRRP group, retain the default settings of Priority and Preemption delay(s). When configuring HSB, set Local AC IP address to 10.23.102.2 and Peer AC IP address to 10.23.102.1.
5. Configure the source address for AC2.
  # Configure AC2 in the same way as that for configuring AC1.
6. Confirm the configuration.
  # Confirm the configuration and click Finish.
Trigger wireless configuration synchronization manually on AC1.
# Choose Monitoring > AC > Wireless Configuration Synchronization Information. The Wireless Configuration Synchronization Information page is displayed. Set Auto refresh to ON.

# Click Manual synchronization under Operation. In the Confirm dialog box that is displayed, click OK. AC2 restarts automatically.
Verify the configuration.
# After AC2 restarts, check the configuration synchronization status on AC1. If Configuration Synchronization State is Synchronization success, the wireless configuration synchronization function is normal.

# The WLAN with SSID wlan-net is available for STAs connected to the AP, and these STAs can connect to the WLAN and go online normally.

# Simulate a master AC fault by restarting the master AC to verify the backup configuration. Restart AC1. When an AP detects a fault on the link connected to AC1, AC2 takes the active role, ensuring service stability.

Before restarting the AC, click Save in the upper right corner of the web page to save the configuration file on the AC to prevent configuration loss after the restart.

# During the restart of AC1, services on the STAs are not interrupted. The AP goes online on AC2. On AC2, choose Monitoring > AP > AP Statistics Collection. It is found that the AP status changes from standby to normal.

# After AC1 recovers from the restart, an active/standby switchback is triggered. The AP automatically goes online on AC1.