AP load balancing does not take effect

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To implement load balancing, the following requirements must be met; otherwise, configurations fail or do not take effect.

1. The requirements for a radio to join a load balancing group are as follows:

- A radio can join only one load balancing group.

- The newly added radios must be of the same type as other radios in the load balancing group.

Radios in a hotspot area must be of the same type. Otherwise, load balancing cannot be achieved. The type of radios in a load balancing group is determined by the type of the first added radio.

- The channel of a new radio must be different from channels of other radios in the load balancing group.

If the channel of a new radio is the same as channels of other radios in the load balancing group, a radio signal collision occurs. To improve coverage areas and minimize collisions, APs in a hotspot area must be configured with different channels. To detect channel collisions, check the configured channel and actual channel of the radio.

- More radios can be added to a load balancing group if it is not full.

In a load balancing group, radios must be configured with different channels and all these radios must be of the same type. In addition, radios of the same type support limited and fixed channels. Therefore, the number of radios in a load balancing group is limited.

2. The load balancing function applies to scenarios where there is a high degree of overlapping between APs' coverage ranges. You can adjust the AP power to enable the APs' coverage areas to overlap.

When the load difference between APs reaches the load difference threshold, some STAs may access the network slowly, because the APs will reject access requests of STAs according to the load balancing algorithm. If a STA continues to send association requests to an AP, the AP allows the STA to associate when the number of consecutive association attempts of the STA exceeds the maximum number of rejection times.

Other related questions:
Principles of AP load balancing
Load balancing can evenly distribute AP traffic loads to ensure high bandwidth for each STA. The load balancing function applies to wireless networks with high user densities to ensure proper access of STAs. Depending on whether a load balancing group needs to be manually created, load balancing is classified into static and dynamic load balancing. For details about the principles, see: V200R005: Configuring Load Balancing V200R006: Configuring Load Balancing

Problem and solution when the round robin load balancing policy of NMP does not take effect in HP_UX
You can perform the following operation when round robin load balancing policy of NMP does not take effect in HP_UX as follows: 1. Issue Description What can I do when the round robin load balancing policy of NMP does not take effect in HP_UX? Situation: HP 11i v3 is delivered with the Native Multi-Path multipathing software and the default load balancing policy round robin. Multiple paths from the hosts to controller A or controller B on the storage array do not take effect, and you can only deliver I/Os through one path. 2. Solution a. Enter scsimgr get_attr -a leg_mpath_enable on the host to check whether the current system has enabled NMP multipathing software. b. Enter scsimgr get_attr -D /dev/rdisk/diskXX -a leg_mpath_enable to check whether LUN has enabled the NMP software. c. Enter scsimgr get_attr -D /dev/rdisk/diskXX to check whether LUN has a default load balancing policy round robin. d. Enter scsimgr lun_map -D /dev/rdisk/diskxx to check which LUN has active status of all paths. e. Enter scsimgr get_stat -H Hardware path to check the I/O statistics of each path to the LUN. If the I/Os of one path is small, nearly no I/O is delivered on this path. f. Above all, although the NMP multipath configuration does not cause any failure, there is a problem which is referred on released notes. You solve the problem by setting alua_enabled of a LUN to false. However, based on lab tests, this method can deliver I/Os through multiple paths but the performance of this method degrades compared to I/Os delivered through one path. You are advised to use one path not to use multiple paths.

Do Fat APs support load balancing
Fat APs do not support load balancing. Load balancing is supported only in AC+Fit AP architecture.

Why the MAC-VLAN does not take effect
MAC address-based VLANs take effect only to untagged packets. If an MAC address-based VLAN does not take effect, check whether the incoming packets contain VLAN tags.

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