Some IP addresse does not work in the company domain

Question

Hello,

We are planning to extend our network for more people. Currently we have around 230 devices.
Main Server's IP address is 172.16.100.101 (DHCP, DNS using windows server 2012) and all the devices work in this range 172.16.100.1-255 but if we want to give more addresses these Ip range does not have internet connection (172.16.101.1-255). Also I can't ping gateway server but can ping all the other devices. So is there any settings that i should check?

Answer 1

Hi,

If we want to Windows DHCP server issue DHCP leases from two separate /24 scopes, we would need to implement VLAN. Then DHCP server will assign an IP address from the scope that corresponds to the subnet that the server is on. In addition, we need to deploy DHCP relay agent to relay DHCPDiscover packets from remote subnets.

In the case of remote subnets where a DHCP relay agent is in use, the DHCP relay agent forwards the DHCP requests from clients on one subnet (VLAN) to a specific DHCP server.

Then make sure VLAN clients get proper IP address, proper gateway and proper DNS. (NOTE: If the DHCP server is in a different subnet from the DHCP clients, then the default gateway must be configured as a DHCP relay.)

Best Regards,
Candy

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