Summary of N+1 Backup Configuration Tasks
Table 1 lists the N+1
backup configuration tasks.
Table 1 N+1 backup configuration tasks
Scenario
|
Description
|
Method and Task
|
APs and ACs are located on a Layer
3 network, and an AP can discover two ACs through DHCP Option 43.
|
An AP can discover a total of two
ACs in dynamic or static mode. In this scenario, use the new method
or traditional method 1 for the configuration. Using the new configuration method, you can directly specify
the active and standby ACs. The configuration logic is clear and simple.
This method is recommended in new N+1 backup configuration scenarios.
Using traditional method 1, you can determine the active and
standby ACs based on the priority. The configuration logic is complex.
This method is applicable to N+1 backup configuration involving earlier
versions but not recommended in N+1 backup configuration scenarios.
In this case, the AP needs to select the active and standby ACs.
You only need to configure the priority for the active AC and standby
ACs and set the priority of the active AC higher than that of the
standby AC.
|
New method
Configuring Option 43 on the DHCP Server
Configuring AC Roles (New Method)
Configuring Revertive Switchover
(Optional) Configuring CAPWAP Heartbeat Detection
(Optional) Configuring the Active/Standby Link Switchover Mode
Enabling N+1 Backup
|
Traditional method 1
Configuring Option 43 on the DHCP Server
Configuring AC Roles (Traditional Method 1)
Configuring Revertive Switchover
(Optional) Configuring CAPWAP Heartbeat Detection
(Optional) Configuring the Active/Standby Link Switchover Mode
Enabling N+1 Backup
|
APs and ACs are located on a Layer
2 network, and an AP can discover more than two ACs.
|
An AP can discover more than two
ACs in dynamic or static mode. In this scenario, use the new method
or traditional method 2 for the configuration. Using the new configuration method, you can directly specify
the active and standby ACs. The configuration logic is clear and simple.
This method is recommended in new N+1 backup configuration scenarios.
Using traditional method 2, you can determine the active and
standby ACs based on the priority. The configuration logic is complex.
This method is applicable to N+1 backup configuration involving earlier
versions but not recommended in N+1 backup configuration scenarios.
In this case, the AP needs to select the active and standby ACs.
You need to configure both the global and individual priorities on
all active ACs so that all APs can associate with the predefined active
or standby AC.
Ensure that the ACs' priorities meet the
following requirements: active AC's individual priority > standby
AC's global priority > active AC's global priority.
|
New method
Configuring AC Roles (New Method)
Configuring Revertive Switchover
(Optional) Configuring CAPWAP Heartbeat Detection
(Optional) Configuring the Active/Standby Link Switchover Mode
Enabling N+1 Backup
|
Traditional method 2
Configuring AC Roles (Traditional Method 2)
Configuring Revertive Switchover
(Optional) Configuring CAPWAP Heartbeat Detection
(Optional) Configuring the Active/Standby Link Switchover Mode
Enabling N+1 Backup
|