How do APs obtain the AC IP address? What is the recommended method

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APs obtain the AC IP address from Layer 2 CAPWAP broadcast packets, Option 43 in Layer 3 packets, or DNS server. The AC IP address can also be configured on APs.

The Option 43 mode is recommended. This is because it is not restricted by Layer 2 networks and no DNS server is required.

Other related questions:
Recommended method for APs to obtain the AC IP address
The DHCP Option 43 method is recommended. This method is not restricted by Layer 2 networking. It is easy to implement and requires no modification or deployment of a DNS server.

How do APs obtain the AC IP address
You can manually configure the AC IP address for APs. APs can also obtain the AC IP address from Layer 2 CAPWAP broadcast packets, Option 43 in Layer 3 packets, or DNS server.

An AC does not to respond to the Discovery packet sent by an AP after the AP obtains an IP address
Perform the following steps to locate the fault: 1. Check the AP authentication mode, blacklist, and whitelist. - If the AP fails the authentication, modify the configuration so that the AP can pass the authentication. - If the AP passes the authentication, go to the next step. 2. View packet statistics on the AC to check whether the AC has received the Discovery packet (assuming that only one AP is connected to the AC). - If the AC has received the Discovery packet, check whether the CAPWAP module processes the Discovery packet correctly. - If the AC has not received any Discovery packet, check whether the AC's source interface or source IP address has been configured.

Method of downloading the web package of a WLAN device
Method of downloading the web package of a WLAN device: To obtain the web file, log in to Huawei's support website (http://support.huawei.com/enterprise), download the corresponding web file according to the product model and version. The file name is in the format of "product name+software version.web file version.web.zip". The web file of the WLAN device is also integrated into the system software package and does not need to be loaded separately. You can directly run the HTTP service. By default, the device loads the web file included in the system software package.

What are Recommendations for the AC Power Supply
Recommendations on the AC power supply are as follows: Use a voltage stabilizer or voltage-regulator to respond to unstable voltages. Use a voltage-regulator in the following situations: The server is directly powered by the mains supply, and the power supply voltage exceeds the rated voltage by -10% to +5% or the voltage range allowed for the server. The server is not directly powered by the mains supply, and the mains voltage exceeds the rated voltage by -15% to +10% or the AC input voltage range allowed for the DC power equipment. To ensure the continuity of power supplies, use the UPS or inverter. Install an electric generator set for an office to ensure the normal communication and power load in case of mains failure. The capacity of the electric generator set should be greater than or equal to 1.5 to 2 times the capacity of the server with uninterrupted power. Connect two storage battery strings in parallel. If UPSs are used as storage batteries, only one UPS battery string is required in general. The UPSs need to work in backup mode and can be connected in parallel or serial. If an inverter is used, take the inverter that can provide more power as the primary one, and take the other as the secondary one.

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