Questions about LAN IP allocation

Unlimited, theoretically unlimited, in fact, China Telecom, China Unicom, and China Tietong are all 3 large local area networks. However, the specific number also depends on the bandwidth of your public network line, how many ports your router has (how many computers can be accommodated), and if the actual ** connection is not enough, you can also connect to the switch and then connect n routes... And so on infinitely.

Anyway, the intranet IP address is definitely enough, and if you run out of Class A, you can use Class B, and there are also Class C, D, and Class E.

LAN port status.

Just like my show above, it depends on your LAN port settings.

IP addresses: are all private IP addresses, e.g. Wait, as for how many computers you say you can allot. It depends on what kind of person it is. For example, for Class C, the subnet mask is available for IP address 64516

From - the subnet mask is 254 available IP addresses.

I don't know if what I said is helpful to you, if there is a ** thank you.

To assign a fixed IP to a local area network, select the IP address segment according to the number of people, and then set the fixed IP on the router and each office computer and server.

1. Disable the DHCP function on the gateway or router, or leave only a small number of addresses for DHCP dynamic allocation;

2. Decide whether to use Class B or Class C addresses according to the number of PCs or servers that need to be accessed in the LAN;

3. Set the IP address mode to static for each PC in the LAN, use the static IP that can be assigned in turn, and set the IP address, subnet mask, and default gateway;

4. If the equipment in the LAN needs to access the Internet, you need to set one or two DNS server addresses.

1. For the sake of cost, it is recommended that ordinary users use a private address, and convert NAT to a public address at the exit.

2. Each independent department assigns its own IP address block (Class C address block is recommended). Note: Configure pointing routes on routers and Layer 3 switches.

3. It is recommended that the number of hosts for each independent network segment should not exceed 100. If there are many hosts, it is recommended to statically assign IP addresses, otherwise it will take a long time to obtain the addresses automatically, or even the addresses cannot be obtained.

4. For the server that registers the domain name and some special hosts, if you want to log in remotely on the Internet, you should give them the public network address. There are two ways, one is to assign them public IP addresses, and then the router assigns a small subnet and LAN port to them. It is also possible to do static mapping at NAT time.

In the first case, there are more hosts allocated to the public network, and the second case is suitable for fewer hosts, so only a few static mappings can be done).

5. For servers or hosts that share resources, you need to configure a static IP address.

With class A, ah. The subnets are then divided, and each branch is assigned a small segment of IP

Oh, it depends on how you distribute it, it's better to find technology.

1. Set up multiple virtual LAN (VLAN), the number of LAN IPs can accommodate more than 254 units, so that multiple virtual LANs can be connected through routers or Layer 3 switches to make your LAN IP capacity more than 253 machines. To put it bluntly, the communication between them is achieved by dividing VLANs and adding routes. （vlan+router)。

This method is effective for network management and security. But maintenance and investment will increase.

If the default is, it can be set to:

This method is simple to set up, but the network expansion is not good, and it is not safe, because it is not good for a broadcast domain to be too large.

It's best to find a tool that specializes in subnet masking, which will help you. ）

3. By automatically obtaining the IP address of the server, so that all the machines will not be connected to the Internet. However, this method also needs to think about the maximum number of computers that can access the Internet, if this value is exceeded, some computers will not be assigned an IP address to the Internet.

Method 1:

500 machines can be set up with 1 gateway.

IP addresses can be assigned all the way from the beginning.

The gateway is used with a subnet mask.

A common fiber optic outlet.

Method 2:

Purchase a vSwitch that allows you to set a VLANN, and place each CIDR block under a VERN. Then add 1 router.

Configure the corresponding routing data in the router so that the five network segments can access each other.

The router is connected to the optical fiber.

The kind of router that costs a few thousand dollars can meet the requirements of this feature, but the performance is low.

Generally, enterprises divide IP according to several factors such as geographical location, department, and purpose, and it is good to divide the corresponding VLAN on the switch. Use a private address. Like this. It depends.

If a company or factory has more than 500 machines, it should be a large company, and there should be a technical manager or director in it. It should be safe and convenient and simple to maintain. There is a separate IT department, and there is a lot of communication.

If it's an Internet café, it's easy. The subnet settings are fine.

There are a variety of distribution schemes. For example, subnetting by geography; by sector; Divided by user needs and so on.

For example, by department. For example, if a company has 10 departments, you can divide 10 subnets, and each department corresponds to a VLAN. Namely:

Each subnet can accommodate 254 available IPs