Example: Configuring dual-link backup and AP license synchronization

Introduction

The following information provides a dual-link backup and AP license synchronization configuration example.

Network requirements

As shown in Figure 1, configure AC 1 as the master AC and AC 2 as the backup AC. When AC 1 fails and AC 2 takes over, the AP can communicate through AC 2. Configure the master CAPWAP tunnel preemption feature on the two ACs so that the AP reconnects to AC 1 when AC 1 recovers.

Enable AP license synchronization on AC 1 and AC 2 for the two ACs to back up licenses for each other.

Figure 1 Network diagram

 

Restrictions and guidelines

When you configure dual-link backup and AP license synchronization, follow these restrictions and guidelines:

·     Make sure the device model is compatible with the software version.

·     Use the actual serial ID of an AP to uniquely identify that AP.

·     If you use a manual AP to establish CAPWAP tunnels with the ACs, make sure the name of the AP is the same on the two ACs and either a serial ID or MAC address is configured for the AP on the two ACs.

·     As a best practice, install a license on the master AC before enabling AP license synchronization.

·     Before enabling AP license synchronization, you must specify IP addresses and roles for the AC and its member ACs in the AP license synchronization group.

·     Configure both AC 1 and AC 2 as the master in the AP license synchronization group.

·     When the master AC fails, the backup AC takes over and becomes the new master AC. The licenses synchronized to the new master AC will be valid for a 30-day grace period.

·     Dual-link backup is applicable to both centralized forwarding and local forwarding. This example uses centralized forwarding.

Procedures

Configuring AC 1

Installing a license

# Install a license on AC 1. (Details not shown.)

Configuring interfaces on AC 1

# Configure VLAN 100 and VLAN-interface 100, and assign an IP address to the VLAN interface. AC 1 will use this IP address to establish CAPWAP tunnels with APs.

<AC1> system-view

[AC1] vlan 100

[AC1-vlan100] quit

[AC1] interface vlan-interface 100

[AC1-Vlan-interface100] ip address 10.1.1.1 16

[AC1-Vlan-interface100] quit

# Configure GigabitEthernet 1/0/1 that connects AC 1 to the switch as a trunk port, and assign it to all VLANs.

[AC1] interface gigabitethernet 1/0/1

[AC1-GigabitEthernet1/0/1] port link-type trunk

[AC1-GigabitEthernet1/0/1] port trunk permit vlan all

[AC1-GigabitEthernet1/0/1] quit

Configuring dual-link backup

# Create AP group group1, and set the connection priority to 7.

[AC1] wlan ap-group group1

[AC1-wlan-ap-group-group1] priority 7

# Specify a backup AC.

[AC1-wlan-ap-group-group1] backup-ac ip 10.1.1.2

# Enable master CAPWAP tunnel preemption.

[AC1-wlan-ap-group-group1] wlan tunnel-preempt enable

# Create an AP grouping rule by AP names.

[AC1-wlan-ap-group-group1] ap ap1

[AC1-wlan-ap-group-group1] quit

Configuring AP license synchronization

# Enable AP license synchronization on AC 1 and configure AC 1 as the master AC.

[AC1] wlan ap-license-group

[AC1-wlan-als-group] local ip 10.1.1.1

[AC1-wlan-als-group] member ip 10.1.1.2

[AC1-wlan-als-group] ap-license-synchronization enable

[AC1-wlan-als-group] quit

Configuring a manual AP

# Create an AP named ap1, and specify the AP model and serial ID.

[AC1] wlan ap ap1 model WA6320

[AC1-wlan-ap-ap1] serial-id 219801A28N819CE0002T

Configuring AC 2

(Optional.) Installing a license

# Install a license on AC 2. (Details not shown.)

Configuring interfaces on AC 2

# Configure VLAN 100 and VLAN-interface 100, and assign an IP address to the VLAN interface. AC 2 will use this IP address to establish CAPWAP tunnels with APs.

<AC2> system-view

[AC2] vlan 100

[AC2-vlan100] quit

[AC2] interface Vlan-interface 100

[AC2-Vlan-interface100] ip address 10.1.1.2 16

[AC2-Vlan-interface100] quit

# Configure GigabitEthernet 1/0/1 that connects AC 2 to the switch as a trunk port, and assign it to all VLANs.

[AC2] interface gigabitethernet 1/0/1

[AC2-GigabitEthernet1/0/1] port link-type trunk

[AC2-GigabitEthernet1/0/1] port trunk permit vlan all

[AC2-GigabitEthernet1/0/1] quit

Configuring dual-link backup

# Create AP group group1, and specify a backup AC. Use the default setting for the connection priority.

[AC2] wlan ap-group group1

[AC2-wlan-ap-group-group1] backup-ac ip 10.1.1.1

# Create an AP grouping rule by AP names.

[AC2-wlan-ap-group-group1] ap ap1

[AC2-wlan-ap-group-group1] quit

Configuring AP license synchronization

# Enable AP license synchronization on AC 1 and configure AC 1 as the master AC.

[AC2] wlan ap-license-group

[AC2-wlan-als-group] local ip 10.1.1.2

[AC2-wlan-als-group] member ip 10.1.1.1

[AC2-wlan-als-group] ap-license-synchronization enable

[AC2-wlan-als-group] quit

Configuring a manual AP

# Create an AP named ap1, and specify the AP model and serial ID.

[AC2] wlan ap ap1 model WA6320

[AC2-wlan-ap-ap1] serial-id 219801A28N819CE0002T

Configuring the switch

Configuring interfaces on the switch

# Create VLAN 100. The switch will use this VLAN to forward the traffic on the CAPWAP tunnels between the AC and AP.

<Switch> system-view

[Switch] vlan 100

[Switch-vlan100] quit

# Create VLAN interface 100, and assign it an IP address.

[Switch] interface vlan-interface 100

[Switch-Vlan-interface100] ip address 10.1.1.3 16

[Switch-Vlan-interface100] quit

# Configure GigabitEthernet 1/0/1 that connects the switch to AC 1 as a trunk port, and assign the trunk port to all VLANs.

[Switch] interface gigabitethernet 1/0/1

[Switch-GigabitEthernet1/0/1] port link-type trunk

[Switch-GigabitEthernet1/0/1] port trunk permit vlan all

[Switch-GigabitEthernet1/0/1] quit

# Configure GigabitEthernet 1/0/2 that connects the switch to AC 2 as a trunk port, and assign the port to all VLANs.

[Switch] interface gigabitethernet 1/0/2

[Switch-GigabitEthernet1/0/2] port link-type trunk

[Switch-GigabitEthernet1/0/2] port trunk permit vlan all

[Switch-GigabitEthernet1/0/2] quit

# Configure GigabitEthernet 1/0/3 that connects the switch to the AP as an access port, and assign the port to VLAN 100.

[Switch] interface gigabitethernet 1/0/3

[Switch-GigabitEthernet1/0/3] port link-type access

[Switch-GigabitEthernet1/0/3] port access vlan 100

# Enable the PoE feature.

[Switch-GigabitEthernet1/0/3] poe enable

[Switch-GigabitEthernet1/0/3] quit

Configuring DHCP

# Create DHCP address pool 100. Specify the 10.1.0.0/16 subnet for the pool.

[Switch] dhcp server ip-pool 100

[Switch-dhcp-pool-100] network 10.1.0.0 mask 255.255.0.0

[Switch-dhcp-pool-100] quit

# Enable DHCP.

[Switch] dhcp enable

Verifying the configuration

# Display AP license synchronization group information on AC 1 to verify that the number of licenses in the group is the sum of licenses installed on AC 1 and AC 2.

<AC1> display wlan ap-license-group

 Group total licenses: 256

 Group used licenses: 1

 AP license synchronization: Enabled

 Local IP: 10.1.1.1

 Local role: Master

 Member information: 1

 IP address        Total      Used      Member role      State      Online duration

 10.1.1.2           0          0          Master            UP         00hr 1min 51sec

# Verify that the AP state is R/M on AC 1.

<AC1> display wlan ap all

Total number of APs: 1

Total number of connected APs: 1

Total number of connected manual APs: 1

Total number of connected auto APs: 0

Total number of connected common APs: 1

Total number of connected WTUs: 0

Total number of inside APs: 0

Maximum supported APs: 384

Remaining APs: 383

Total AP licenses: 256

Local AP licenses: 256

Server AP licenses: 0

Remaining local AP licenses: 255

Sync AP licenses: 0

 

                                  AP information

 State : I = Idle,      J  = Join,       JA = JoinAck,    IL = ImageLoad

         C = Config,    DC = DataCheck,  R  = Run,   M = Master,  B = Backup

 

AP name                        APID  State Model           Serial ID

ap1                            1     R/M   WA6320          219801A28N819CE0002T

# Verify that the AP state is R/M on AC 1 and R/B on AC 2, and the number of licenses is 256.

<AC2> display wlan ap all

Total number of APs: 1

Total number of connected APs: 1

Total number of connected manual APs: 1

Total number of connected auto APs: 0

Total number of connected common APs: 1

Total number of connected WTUs: 0

Total number of inside APs: 0

Maximum supported APs: 384

Remaining APs: 383

Total AP licenses: 256

Local AP licenses: 256

Server AP licenses: 0

Remaining local AP licenses: 256

Sync AP licenses: 256

 

                                  AP information

 State : I = Idle,      J  = Join,       JA = JoinAck,    IL = ImageLoad

         C = Config,    DC = DataCheck,  R  = Run,   M = Master,  B = Backup

 

AP name                        APID  State Model           Serial ID

ap1                            1     R/B   WA6320          219801A28N819CE0002T

# Shut down VLAN-interface 1 on AC 2 and wait for no longer than 30 seconds, during which service interruption occurs. Verify that the AP is in R/M state.

<AC2> display wlan ap all

Total number of APs: 1

Total number of connected APs: 1

Total number of connected manual APs: 1

Total number of connected auto APs: 0

Total number of connected common APs: 1

Total number of connected WTUs: 0

Total number of inside APs: 0

Maximum supported APs: 384

Remaining APs: 383

Total AP licenses: 256

Local AP licenses: 256

Server AP licenses: 0

Remaining local AP licenses: 255

Sync AP licenses: 256

 

                                  AP information

 State : I = Idle,      J  = Join,       JA = JoinAck,    IL = ImageLoad

         C = Config,    DC = DataCheck,  R  = Run,   M = Master,  B = Backup

 

AP name                        APID  State Model           Serial ID

ap1                            1     R/M   WA6320          219801A28N819CE0002T

# Bring up VLAN-interface 1 on AC 1. Verify that the AP state is R/M on AC 1 and R/B on AC 2. (Details not shown.)

Configuration files

·     AC 1:

#

vlan 100

#

interface Vlan-interface100

 ip address 10.1.1.1 255.255.0.0

#

interface GigabitEthernet1/0/1

 port link-type trunk

 port trunk permit vlan all

#

wlan ap-group group1                                                           

 priority 7                                                                    

 wlan tunnel-preempt enable                                                    

 backup-ac ip 10.1.1.2                                                         

 ap ap1

#

wlan ap ap1 model WA6320

 serial-id 219801A28N819CE0002T

#

wlan ap-license-group                                                          

 local ip 10.1.1.1                                                             

 member ip 10.1.1.2                                                            

 ap-license-synchronization enable                                             

#

·     AC 2:

#

vlan 100

#

interface Vlan-interface100

 ip address 10.1.1.2 255.255.0.0

#

interface GigabitEthernet1/0/1

 port link-type trunk

 port trunk permit vlan all

#

wlan ap-group group1                                                            

 backup-ac ip 10.1.1.1                                                         

 ap ap1

#

wlan ap ap1 model WA6320

 serial-id 219801A28N819CE0002T

#

wlan ap-license-group                                                           

 local ip 10.1.1.2                                                             

 member ip 10.1.1.1                                                            

 ap-license-synchronization enable                                              

#

·     Switch

#

 dhcp enable

#

vlan 100

#

dhcp server ip-pool 100

 network 10.1.0.0 mask 255.255.0.0

#

interface Vlan-interface100

 ip address 10.1.1.3 255.255.0.0

#

#

interface GigabitEthernet1/0/1

 port link-type trunk

 port trunk permit vlan all

#

interface GigabitEthernet1/0/2

 port link-type trunk

 port trunk permit vlan all

#

interface GigabitEthernet1/0/3

 port link-type access

 port access vlan 100

 poe enable

#

Related documentation

·     AP License Synchronization Command Reference in H3C Access Controllers Command References

·     AP License Synchronization Configuration Guide in H3C Access Controllers Configuration Guides

·     AP Management Command Reference in H3C Access Controllers Command References

·     AP Management Configuration Guide in H3C Access Controllers Configuration Guides

·     WLAN High Availability Command Reference in H3C Access Controllers Command References

·     WLAN High Availability Configuration Guide in H3C Access Controllers Configuration Guides