Introduction
In an era of such a developed network, more and more devices need to connect to the network, especially the rapid development of new industries of smart home and the Internet of Things has led to more and more network devices in a local area network. So when the device in the local area network reaches its capacity limit, how do you need to set it to make the device re-operate? Or let more devices connect to the Internet? Let’s discuss how to set the number of IP addresses of the LAN.
Set the number of IP addresses of the LAN
1, LAN address settings
Take the TL-WDR8690 router of TP-LINK as an example to set and calculate the number of IP addresses of the current network.
is shown in the figure above. The subnet mask is 255.255.255.0, which means there are 255 addresses in this LAN. In addition to the address 10.168.187.1 used by the router itself, there are 254 addresses, that is, there are 254 IP addresses that can be used in this LAN. Here, you can determine the number of IP addresses that can be used in this LAN by setting the value of the subnet mask. For the relevant instructions on subnet mask calculation, you can pay attention to other articles, and will not be explained here.
However, ordinary home routers cannot achieve the ability of 254 devices to connect simultaneously due to performance bottlenecks, so the bottleneck in the number of device connections of home routers is not in the basic settings but in the device hardware.
2, DHCP server settings
DHCP (Dynamic Host Configuration Protocol) is a network protocol for a LAN. It refers to the server controlling a range of IP addresses. When the client logs into the server, he can automatically obtain the IP address and subnet mask assigned by the server.
is shown in the figure below. The interface for the DHCP server of the TL-WDR8690 router is set up for the TL-WDR8690 router
It is worth noting that the "Address Pool Start Address" and "Address Pool End Address" in the above configuration interface determine the number of IP addresses in the LAN that the router can actively allocate. As shown in the figure above, the allocated addresses are 100. If the DHCP server has already allocated 100 addresses, then if there is another device access, it cannot be automatically assigned to it. This will also cause the illusion that the LAN address has been used up. In fact, it is just that the IP address pool of the DHCP server has been used up, and there are other addresses that are not in the address pool in the entire network segment that can be used. However, after the DHCP server IP address pool is used up, you need to manually set the IP address of the networked device to enable device networking. The setup plan will be described in another article.
increases the router level or uses soft routing
When the number of LAN networked devices reaches a certain number and hardware bottlenecks occur, you need to use router cascade or use switch and soft routing to solve the problem of IP address expansion.
realizes VLAN
through layer three switch of course, using layer three switches with VLAN function can also achieve IP address expansion, but the hardware still has performance bottlenecks in the end, and the software settings can be changed at will, so the bottleneck in IP address expansion is always a hardware problem, and the hardware ultimately needs to pile up.
Summary
To sum up, there are many ways to expand the capacity of LAN IP address. Generally speaking, it is recommended to check whether to set up the problem first. If not, consider expanding the hardware or using soft routing alternatives.
