What are common causes for AP faults

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The common causes are as follows:
- The AP does not have an IP address.
- The AP's IP address conflicts with that of a device on the local LAN.
- The network between the AP and AC is faulty.
- The AP fails to be authenticated.
- The number of APs connected to the AC reaches the upper limit.
- The parameters such as the MAC address and SN on the AP conflict with the parameters on other APs.
- The radio environment deteriorates.
- The AP fails due to hardware problems.

Other related questions:
What are the common causes for STP flapping
The packet change and timer timeout repeatedly trigger recalculation and make network switches constantly repeat the following process: 1. Root bridge selection; 2. Port role switch; 3. Port status migration. Repetition of this process for many times is called STB flapping, which cannot be converged. The common causes are as follows: Link fault: The link attributes such as the port status, rate, and duplex mode of a port on the network constantly change. Node fault: A switch has high CPU usage and cannot send or process STP packets at specified intervals. Network fault: The network is congested, making the STP packets in the direction of root port be discarded in the process of forwarding. L2PT transparently transmits STP packets of other networks, making the STP convergence mistakenly occur on the device where the STP packets are discarded. The multicast suppression function is incorrectly configured on the network, making STP packets be discarded occasionally. Modify configuration or optimize the network design based on different causes to rectify the STP flapping.

What are the common causes of the failure to initiate a SiteCall?
Common causes of the failure to initiate a SiteCall: An endpoint can initiate a SiteCall only after registering with the GK server through the allocated account and password. Log in to the web interface, choose System > Admin > Call > H.323, and set the following parameters: Register on GK: Select Enable. GK IP: Enter the GK/SC address. (The management platform can be the MCU's built-in web interface or SMC1.0/2.0.) Site number: Enter the site ID allocated by the platform. User name: The value must be the same as that specified on the management platform. Password: The value must be the same as that specified on the management platform. HUAWEI GK: Select Enable.

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