My DHCP server just dishes out addresses on the 0.x network, and I don't care if it issues any addresses to the 1.x network at this time I was going to make all the addresses on the 1.x network STATICĪny help here would be greatly apprecieated, oh great and powerful dragons. And so you mean for the ip address 192.168.1.1, the subnet mask must be 255.255.255. Since the Class C mask only uses the last octet for. To make smaller networks, called subnetworks, we will borrow bits from the host portion of the mask. So now I understand now I cannot change it. The default Class C mask is: 255.255.255.0. So here is where I got confused and quit for the day before I did any real damage.Īny Ideas about steps I may have missed or anything I may have overlooked in this change. I just wanted to know if I could change it to something else. Key Concept: Each of the three IP unicast/broadcast address classes, A, B and C, has a default subnet mask defined that has a one for each bit of the class’s network ID, a zero bit for each bit of its host ID, and no subnet ID bits. I try to set an IP address of a laptop at 192.168.1.100 with subnet mask 255.255.254.0 and gateway of 192.168.0.2 and DNS server at 192.168.0.1 and the message says that I cannot have a gateway on a different network. 255.255.255.0: This is the default subnet mask for Class C, but can be a custom Class A with 16 bits for the subnet ID or a Class B with 8 bits for the subnet ID. If it is not, you must properly configure the subnet mask and the gateway address. 255.0, meaning that the first 3 octets (24 bits) in an IP address are used to identify the network ID, and the last octet (8 bits) are dedicated to the host ID. So I change the subnet mask on every device I can think of on the network (switches, servers, printers, ect.) By default, the subnet mask for a Class C IP address class is set to 255.255. I did some reading and it seems the easiest and most efficient way to do this was to change my subnet mask to 255.255.254.0 the network youre in is described like this : 66.6.14.0/20. I recently needed to expand the network for future use. This tells us that the host part of the network uses 12 bits, while the network part has 20 bits.

Why is 255 255 255 0 default subnet