Slow access of WLAN terminals

Methods of troubleshooting the problem related to slow user access:

1. The wireless air interface is of poor quality.
- Use automatic channel optimization to properly plan the channels, and adjust the special areas to reduce overlapping channels.
- Adjust the power to ensure strong signals.
- Rule out other interference sources by using the WirelessMon or inSSIDer tool.
2. The NICs of some terminals cause the slow access. The access of certain users is slower than that of other users.
Replace the NICs or terminals.
3. The intermediate network causes the slow access.
- The problem of slow user association widely occurs in certain floors of buildings. It is probably the long latency of the intermediate network that causes the slow user access.
- Ping the APs, DHCP server, RADIUS server, and users from the AC to determine the locations where network latency occurs.
4. The load balancing causes the slow user access.
WLAN load balancing is used to balance the load of the clients on a WLAN, which ensures the performance and bandwidth of each client. This function is applied only in high-density wireless network environments.
If load balancing is enabled in sparsely-populated areas (each AP covers fewer than 15 users), it cannot function as expected, and slow user association speed may be caused due to APs' denial of user association.
- Use load balancing in some densely-populated scenarios.
- Change the load balancing threshold into a proper value to decrease the load balancing triggering frequency.
- Reduce the times of reconnection and shorten the time for users in denial due to load balancing reasons.

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