Multiple wireless router settings in the hotel

When a large enterprise with a large network span deploys a wireless LAN in the company, some employees may need full mobile communication capabilities, which requires a wireless roaming connection solution. Since radio waves will continue to attenuate during re-propagation, the communication range of the wireless AP is limited to a certain distance. When there are multiple APs in the network environment, their signal coverage will overlap to a certain extent. Then use network cables to connect the multiple APs. Wireless client users can move arbitrarily within the areas covered by different APs and maintain the same coverage. Network connection, this is wireless roaming. When in use, the wireless network card can automatically discover the nearby AP with the strongest signal strength, and send and receive data through this AP to maintain an uninterrupted network connection. I believe everyone has used a mobile phone. When the mobile phone moves from the coverage area of ??one base station to the coverage area of ??another base station, it can provide uninterrupted and seamless call capabilities. This is the use of wireless roaming function.

In fact, the roaming function of wireless LAN is exactly the same as that of mobile phones.

The specific configuration method of wireless roaming:

1. Wireless AP configuration:

Since wireless roaming must be composed of multiple APs, the IP address of each AP must be assigned in advance and ensure that the IP addresses of all APs are in the same Network segments must be set to the same ESSID! If we want to ensure the security of the wireless network, we can encrypt the AP with WEP, but the AP encryption method and encryption secret must be the same! Turn off the broadcast SSID, and if necessary, set up MAC address filtering to prevent illegal clients from invading your LAN through the wireless network.

In order to achieve roaming, we must overlap the signal coverage of multiple APs. If APs with overlapping coverage use channels with overlapping signals, they will interfere with each other during signal transmission. This reduces network performance and efficiency. Therefore, the channels occupied by each AP coverage area must follow certain specifications. APs in overlapping areas cannot use the same channel. The 802.11b protocol works on 2.4000GHz~2.4835GHz channels. There are 11 overlapping channels. Among these 11 channels, only three channels are non-overlapping, namely channels 1, 6, and 11. Cellular coverage using these three channels is most appropriate.

2． Principles for placing wireless APs:

The wireless AP should be placed as high as possible. Wireless signals propagate in a straight line. Every time an obstacle is encountered, part of the wireless signal will be cut off. Placing the wireless AP at a relatively high position can effectively avoid fixed or mobile obstacles between the AP and the network card. This ensures the coverage of the wireless network and the smoothness of the wireless network. If the height of the AP is not high enough, the effect of simply equipping it with a large-gain antenna will be very limited. You should ensure that there are no more than two walls between the wireless AP and the client. Otherwise, you need to consider increasing the number of APs to ensure the strength of the wireless signal.

To achieve wireless roaming, seamless connections between APs are required, and the coverage areas of adjacent APs must overlap slightly. The size of the overlapping area depends on the number of users in the area and network usage. Try to avoid wireless signal blind spots as much as possible!

3. Wireless network card settings:

For mobile clients, wireless roaming is no different from connecting to an AP, and no special settings are required. Under Windows98/Me/2000 system, you need to install the wireless client management software that comes with the wireless network card, set it up and then access the wireless network to achieve wireless roaming. If you are using a Windows XP system, you do not need to install management software. After installing the driver and management software of the wireless network card, the wireless network card needs to set the same ESSID and WEP encryption method and password as the wireless AP. Select Ingrastructure (infrastructure mode) and do not select Ad-Hoc (point-to-point mode). The IP address of the network card can be configured by yourself according to the actual situation. In this way, wireless roaming can be achieved!