Vlsm Variable Length Subnet Mask Workbooks
Vlsm variable length subnet mask iworkbooks v 1 1.
Vlsm variable length subnet mask workbooks. Rip version 2 ospf eigrp dual is is and bgp. By using vlsm you can adjust the number of subnets and number of addresses depending on the specific needs of your network. The same rules apply to a class a or. If you use a class c address with a default subnet mask you end up with one subnet containing 256 addresses.
Vlsm allows you to use different subnet masks across the network for the same class of addresses. Vlsm is supported by the following protocols. If you use a class c address with a default subnet mask you end up with one subnet containing 256 addresses. What is vlsm variable length subnet masks allow you a much tighter control over your addressing scheme.
For example a 30 subnet mask which gives 2 host addresses per subnet can be used for point to point links between routers. By using vlsm you can adjust the number of subnets and number of addresses depending on the specific needs of your network. Figure 2 2 shows how vlsm can be used to save address space in the network shown in figure 2 1. 1 subnet what is vlsm variable length subnet masks allow you a much tighter control over your addressing scheme.
You need to configure your router for variable length subnet masking by setting up one. If you use a class c address with a default subnet mask you end up with one subnet containing 256 addresses.